City of Santa Rosa
2025 Urban Water
Management Plan
Jointly prepared by
June 2026
DRAFT 2025
Urban Water
Management
Plan
June 2026
City of Santa Rosa i 2025 Urban Water Management Plan
June 2026
TABLE OF CONTENTS
SECTION PAGE NO.
EXECUTIVE SUMMARY ................................ ................................ ................................ ........................... ES-1
1. INTRODUCTION ................................ ................................ ................................ .............................. 1-1
1.1 Introduction ....................................................................................................................................................... 1-1
1.2 Importance and Extent of City’s Water Management Planning Efforts ..................................... 1-1
1.3 Changes from 2020 UWMP ........................................................................................................................ 1-1
1.4 Plan Organization............................................................................................................................................ 1-2
2. PLAN PREPARATION ................................ ................................ ................................ ......................2-1
2.1 Basis for Preparing a Plan ............................................................................................................................ 2-1
2.2 Regional Planning ........................................................................................................................................... 2-1
2.3 Individual or Regional Planning and Compliance .............................................................................. 2-2
2.4 Fiscal or Calendar Year and Units of Measure ..................................................................................... 2-2
2.5 Coordination And Outreach ....................................................................................................................... 2-3
2.5.1 Wholesale and Retail Coordination ............................................................................................. 2-3
2.5.2 Coordination with Other Agencies and the Community .................................................... 2-3
2.5.3 Notice to Cities and Counties ........................................................................................................ 2-4
3. SYSTEM DESCRIPTION ................................ ................................ ................................ ...................3-1
3.1 General Description ........................................................................................................................................ 3-1
3.2 Service Area Boundary Maps ...................................................................................................................... 3-1
3.3 Water System History And Description .................................................................................................. 3-2
3.3.1 Water System History ........................................................................................................................ 3-2
3.3.2 Water System Description ............................................................................................................... 3-6
3.4 Service Area Climate ................................................................................................................................... 3-10
3.4.1 Climate Statistics .............................................................................................................................. 3-10
3.4.2 Potential Effects of Climate Change ......................................................................................... 3-11
3.5 Service Area Population And Demographics .................................................................................... 3-12
3.5.1 Service Area Population ................................................................................................................ 3-12
3.5.2 Other Social, Economic, and Demographics Factors ......................................................... 3-12
3.6 Land Uses Within Service Area ............................................................................................................... 3-13
4. WATER USE CHARACTERIZATION ................................ ................................ ................................ 4-1
4.1 Demand Analysis Methodology ................................................................................................................ 4-1
4.2 Non-Potable Versus Potable Water Use ................................................................................................ 4-1
4.3 Past, Current, And Projected Water Use By Sector ............................................................................ 4-2
4.3.1 Water Use Sectors Listed in Water Code .................................................................................. 4-2
4.3.2 Water Use Sectors in Addition to Those Listed in Water Code ........................................ 4-3
4.3.3 Past Water Use ..................................................................................................................................... 4-3
4.3.4 Distribution System Water Loss .................................................................................................... 4-4
4.3.5 Current Water Use .............................................................................................................................. 4-7
4.3.6 Projected Water Use .......................................................................................................................... 4-8
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4.3.7 Estimated Water Use for 2026-2030 Drought Risk Assessment ................................... 4-10
4.4 Water Use For Lower Income Households ......................................................................................... 4-11
4.5 Estimating Future Water Savings ........................................................................................................... 4-12
4.6 Climate Change Considerations ............................................................................................................. 4-13
4.6.1 Climate Change Mitigation .......................................................................................................... 4-15
4.6.2 Climate Change Adaptation ........................................................................................................ 4-16
5. SB X7-7 BASELINES, TARGETS AND 2020 COMPLIANCE ................................ ............................ 5-1
6. WATER SUPPLY CHARACTERIZATION ................................ ................................ .......................... 6-1
6.1 Purchased or Imported Water ................................................................................................................... 6-1
6.1.1 Past and Current Contract Water ................................................................................................. 6-2
6.1.2 Future Contract Water ...................................................................................................................... 6-3
6.2 Groundwater ..................................................................................................................................................... 6-3
6.2.1 Groundwater Basin Description .................................................................................................... 6-3
6.2.2 Groundwater Management ......................................................................................................... 6-10
6.2.3 Overdraft Conditions ...................................................................................................................... 6-12
6.2.4 Historical Groundwater Pumping .............................................................................................. 6-13
6.2.5 Future Groundwater Pumping .................................................................................................... 6-14
6.3 Wastewater and Recycled Water – Non-Potable Supply ............................................................. 6-15
6.3.1 Wastewater System Description ................................................................................................ 6-15
6.3.2 Wastewater Disposal and Recycled Water Uses.................................................................. 6-17
6.3.3 Projected Uses of Recycled Water for Regional System .................................................. 6-20
6.3.4 Surface Water Rights ...................................................................................................................... 6-22
6.4 Storm Water Diversions ............................................................................................................................. 6-23
6.5 Desalinated Water ....................................................................................................................................... 6-23
6.6 Water Exchanges and Transfers ............................................................................................................. 6-23
6.7 Future Water Projects ................................................................................................................................. 6-24
6.8 Summary Of Existing And Planned Sources Of Water .................................................................. 6-25
6.8.1 Estimated Supply for Drought Risk Assessment ................................................................. 6-26
6.9 Climate Change Impacts to Supply ....................................................................................................... 6-28
6.10 Energy Intensity ............................................................................................................................................ 6-28
7. WATER SERVICE RELIABILITY AND DROUGHT RISK ASSESSMENT ................................ ...........7-1
7.1 Constraints on Water Sources.................................................................................................................... 7-1
7.1.1 Sonoma Water Supply Constraints .............................................................................................. 7-1
7.1.2 Groundwater Supply Constraints ................................................................................................. 7-8
7.1.3 Recycled Water Supply Constraints .......................................................................................... 7-12
7.2 Year Type Characterization ...................................................................................................................... 7-13
7.2.1 Water Service Reliability ................................................................................................................ 7-14
7.2.2 Water Service Reliability – Normal Year ................................................................................. 7-15
7.2.3 Water Service Reliability – Single-Dry Year ........................................................................... 7-15
7.2.4 Water Service Reliability – Five Consecutive Dry Years .................................................... 7-16
7.2.5 Water Service Reliability – Management Tools and Options ......................................... 7-18
7.3 Drought Risk Assessment ......................................................................................................................... 7-18
7.3.1 Data, Methods, and Basis for Water Shortage Condition ................................................ 7-18
7.3.2 DRA Water Source Reliability ...................................................................................................... 7-20
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7.3.3 Total Water Supply and Use Comparison .............................................................................. 7-20
8. WATER SHORTAGE AND CONTINGENCY PLANNING ................................ ................................ .8-1
9. DEMAND MANAGEMENT MEASURES ................................ ................................ .......................... 9-1
9.1 Water Conservation Program Overview................................................................................................. 9-1
9.2 Demand Management Measures ............................................................................................................. 9-2
9.2.1 Water Waste Prevention Ordinance ............................................................................................ 9-2
9.2.2 Metering ................................................................................................................................................. 9-4
9.2.3 Conservation Pricing.......................................................................................................................... 9-4
9.2.4 Public Education and Outreach ..................................................................................................... 9-4
9.2.5 Programs to Assess and Manage Distribution System Real Loss .................................... 9-6
9.2.6 Water Conservation Program Coordination and Staffing Support ................................. 9-7
9.2.7 Other Demand Management Measures .................................................................................... 9-7
9.3 Implementation to Achieve Water Use Targets ............................................................................... 9-12
9.4 Water Use Objective ................................................................................................................................... 9-12
9.5 Member Of The California Water Efficiency Partnership (Formerly California Urban Water Conservation Council) ................................................................................................................................ 9-13
10. PLAN ADOPTION AND SUBMITTAL IMPLEMENTATION ................................ ......................... 10-1
10.1 Plan Completion Timeline......................................................................................................................... 10-1
10.2 Notice Of Public Hearing .......................................................................................................................... 10-1
10.2.1 Notice to Cities and Counties ..................................................................................................... 10-1
10.2.2 Notice to the Public ........................................................................................................................ 10-2
10.3 Public Hearing And Adoption ................................................................................................................. 10-3
10.4 Plan Submittal ............................................................................................................................................... 10-3
10.5 Public Availability ......................................................................................................................................... 10-3
10.6 Amending An Adopted UWMP Or Water Shortage Contingency Plan .................................. 10-3
TABLES
Table ES-1: Total Projected Water Use (Potable and Non-Potable), AF Table ES-2: Current and Projected Water Supplies, AF
Table 2-1: Public Water Systems (DWR Table 2-1 Retail)
Table 2-2: Plan Identification (DWR Table 2-2)
Table 2-3: Supplier Identification (DWR Table 2-3)
Table 2-4: Water Supplier Information Exchange (DWR Table 2-4 Retail) Table 2-5: Coordination and Notification for Plan Preparation Table 3-1: Monthly Average Climate Data Summary
Table 3-2: Retail Population Current and Projected (DWR Table 3-1 Retail) Table 3-3: Current Land Use within Urban Growth Boundary(a) Table 3-4: Housing Projections
Table 4-1: Past Potable Water Use by Sector, AF
Table 4-2: Past Non-Potable Water Use by Sector, AF
Table 4-3: Total Past Water Use, AF
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Table 4-4: Water Loss Audit Reporting (DWR Table 4-5 Retail) Table 4-5: Progress Towards 2028 Water Loss Standard (DWR Table 4-6 Retail, Real Loss) Table 4-6: Progress Towards 2028 Water Loss Standard (DWR Table 4-6 Retail, Apparent Loss) Table 4-7: Current Potable Water Customers (2025)
Table 4-8: Current Non-Potable Water Customers (2025)
Table 4-9: Total Uses for Potable and Non-Potable Water - 2025 Actual (DWR Table 4-1 Retail) Table 4-10: Projected Demands for Potable Water (DWR Table 4-2 Retail) Table 4-11: Estimated Potable Water Use for 2026-2030, AF Table 4-12: Estimated Non-Potable Water Use for 2026-2030, AF Table 4-13: Inclusion in Water Use Projections: Water Code Section 10631 (a), 10631 (d)(4)(A), and 10631 (d)(4)(B) (DWR Table 4-3 Retail)
Table 4-14: Water Demand Cumulative Savings Projections, AF Table 5-1: SB X7-7 2020 Target Progress (DWR Table 5-1 Retail) Table 6-1: Past and Current (2025) Purchased Water, AF
Table 6-2: Projected Purchased Water Supply Availability, AF Table 6-3: Characteristics of Groundwater Basins/Subbasins Underlying City of Santa Rosa Urban Growth Boundary
Table 6-4: Summary of Geological Units in the Santa Rosa and Rincon Valley Groundwater Subbasins(a, b)
Table 6-5: City of Santa Rosa Municipal Groundwater Wells Table 6-6: Groundwater Volume Pumped (DWR 6-1 Retail)
Table 6-7: Projected Groundwater Supply Availability, AF Table 6-8: Agencies Participating in Incremental Recycled Water Program Table 6-9: Wastewater Collected Within Service Area in 2020 (DWR Table 6-2 Retail) Table 6-10: Wastewater Treatment and Discharge Within Service Area in 2020 (DWR Table 6-3 Retail) Table 6-11: Recycled Water Direct Beneficial Uses Within Service Area (DWR Table 6-4 Retail) Table 6-12: 2015 UWMP Recycled Water Use Projection Compared to 2020 Actual (DWR Table 6-5 Retail)
Table 6-13: Methods to Expand Future Recycled Water Use (DWR Table 6-6 Retail) Table 6-14: Expected Future Water Supply Projects or Programs (DWR Table 6-7 Retail) Table 6-15: Water Supplies – Actual (DWR Table 6-8 Retail) Table 6-16: Water Supplies – Projected (DWR Table 6-9 Retail) Table 6-17: 2026-2030 Projected Water Supply, Assuming Dry Conditions, AF Table 6-18: Energy Intensity – Multiple Water Delivery Products (DWR Table O-1C) Table 6-19: Energy Intensity – Wastewater and Recycled Water (DWR Table O-2) Table 7-1: Basis of Water Year Data (Reliability Assessment) (DWR 7-1 Retail) Table 7-2: Normal Year Supply and Demand Comparison (DWR 7-2 Retail) Table 7-3: Single-Dry Year Supply and Demand Comparison (DWR Table 7-3 Retail) Table 7-4: Multiple Dry Years Supply and Demand Comparison (DWR Table 7-4 Retail) Table 7-5: Estimated Water Use for 2026-2030, AF
Table 7-6: 2026-2030 Projected Water Supply, Assuming Dry Conditions, AF Table 7-7: Five-Year Drought Risk Assessment Tables to Address Water Code Section 10635(b) (DWR Table 7-5 Retail)
Table 10-1: Notification to Cities and Counties (DWR Table 10-1)
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FIGURES
Figure 3-1: City of Santa Rosa Existing Water System
Figure 3-2: City of Santa Rosa Service Area with Associated Sonoma County Water Agency Infrastructure
Figure 3-3: City of Santa Rosa Urban Recycled Water Distribution System Figure 3-4: City of Santa Rosa Water Pressure Zones
Figure 6-1: City of Santa Rosa Basins
Figure 6-2: City of Santa Rosa Regional System
Figure 9-1: Water Waste Cases 2021-2025
APPENDICES
Appendix A: Adoption Resolution for 2025 Urban Water Management Plan and 2025 Water Shortage Contingency Plan
Appendix B: Public Notices for Urban Water Management Plan and Water Shortage Contingency Plan Appendix C: Department of Water Resources Reporting Tables Appendix D: Water Demand Analysis
Appendix E: Water Shortage Contingency Plan
Appendix F: Department of Water Resources Urban Water Management Plan Checklist
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LIST OF ACRONYMS AND ABBREVIATIONS
AB Assembly Bill
ABAG Association of Bay Area Governments
AF Acre-Feet
AFY Acre-Feet Per Year
AMI Advanced Metering Infrastructure
ASR Aquifer Storage and Recovery
AWWA American Water Works Association
BMPs Best Management Practices
BPU Board of Public Utilities
CALGreen California Green Building Standards Code
CalWEP California Water Efficiency Partnership
CASGEM California Statewide Groundwater Elevation Monitoring CDF California Department of Finance
CEQA California Environmental Quality Act
cfs Cubic Feet Per Second
CII Commercial, Industrial, and Institutional
CIMIS California Irrigation Management Information System City City of Santa Rosa
COE Corps of Engineers
CUWCC California Urban Water Conservation Council
CWC California Water Code
CY Calendar Year
DDW Division of Drinking Water
DEIR Draft Environmental Impact Report
District Sonoma County Flood Control and Water Conservation District DMMs Demand Management Measures
DOF Department of Finance
DPH Department of Public Health
DRA Drought Risk Assessment
DWR Department of Water Resources
DWR Guidebook Urban Water Management Plan Guidebook 2020 EFDI Efficient Fixtures Direct Install
EIS Environmental Impact Statement
EKI EKI Environment and Water, Inc.
EPA Environmental Protection Agency
ESA Endangered Species Act
ESU Evolutionarily Significant Unit
ET Evapotranspiration
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ETo Reference Evapotranspiration
FERC Federal Energy Regulatory Commission
GHG Greenhouse Gas
GMP Groundwater Master Plan
GPCD Gallons Per Capita Per Day
gpm Gallons per Minute
GPSCD Gallons per Service Connection per Day
GSA Groundwater Sustainability Agency
GSP Groundwater Sustainability Plan
HDPE High-Density Polyethylene
IRWP Incremental Recycled Water Program
JPA Joint Powers Agreement
LID Low Impact Development
LTP Laguna Wastewater Treatment Plant
MG Million Gallons
mgd Million Gallons Per Day
MOU Memorandum of Understanding
NCEI National Centers for Environmental Information
NCRWQCB North Coast Regional Water Quality Control Board NMFS National Marine Fisheries Service
NOAA National Oceanic and Atmospheric Administration
NOI Notice of Intent
NPDES National Pollution Discharge Elimination System
Ordinance Water Waste Ordinance No. 3426
P.O.W.E.R. Public Officials for Water and Environmental Reform PAD Pre-application Document
Permit Sonoma Permit and Resources Management Department PG&E Pacific Gas and Electric
PVC Polyvinylchloride
PVP Potter Valley Project
PWS Public Water System
QWEL Qualified Water Efficient Landscape
Regional System Santa Rosa Regional Water Reuse System
Restructured
Agreement Restructured Agreement for Water Supply
RPM Reasonable and Prudent Measures
RUWMP Regional Urban Water Management Plan
SB Senate Bill
SB X7-7 Senate Bill Seven of the Senate’s Seventh Extraordinary Session of 2009 SGMA Sustainable Groundwater Management Act
Shortage Methodology Water Shortage Allocation Methodology
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Shortage Plan Water Shortage Contingency Plan
SMSWP Sonoma Marin Saving Water Partnership
Sonoma Water Sonoma County Water Agency
SRPWGMP Santa Rosa Plain Watershed Groundwater Management Plan SWRCB State Water Resources Control Board
ULFTs Ultra-Low-Flow Toilets
USACE U.S. Army Corps of Engineers
USGS U.S. Geological Survey
UWMP Urban Water Management Plan
UWMP Act Urban Water Management Planning Act
WC Act Water Conservation Act
WELO Water Efficient Landscape Ordinance
WET Water Education for Teachers
WSAP Water Supply Alternatives Plan
WUE Water Use Efficiency
WWTP Wastewater Treatment Plant
City of Santa Rosa ES-1 2025 Urban Water Management Plan June 2026
EXECUTIVE SUMMARY
The purpose of this Executive Summary is to provide an easily understood summary (Lay Description) of the City of Santa Rosa’s (City’s) 2025 Urban Water Management Plan (UWMP) in compliance with California Water Code (CWC) Section 10630.5:
CWC Section 10630.5. Each plan shall include a simple lay description of how much water the agency has on a reliable basis, how much it needs for the foreseeable future, what the agency’s strategy is for meeting its water needs, the challenges facing the a gency, and any other information necessary to provide a general understanding of the agency’s plan.
The Urban Water Management Planning Act (UWMP Act) requires water suppliers that provide over 3,000 acre feet per year (AFY) or have over 3,000 connections to prepare and submit to the State Department of Water Resources (DWR) an UWMP that spans at least a 20-year planning horizon every 5 years. The State recommends, but does not require, a 25-year planning horizon. The City’s 2025 UWMP has been prepared in accordance with the UWMP Act, as defined by the CWC, Division 6, Part 2.6, Sections 10610 through 10656, and the Water Conservation Act of 2009 (WC Act).
The City is a retail water supplier to approximately 56,000 residential and commercial accounts located within Santa Rosa’s service area. This 2025 UWMP addresses the City water system and includes a description of the water supply sources, historical and projected water use, and a comparison of water supply to water demands during normal, single dry, and multiple dry years through 2050. It also includes a drought risk assessment for 2026 to 2030.
This 2025 UWMP also addresses water use efficiency legislation, including the City’s 2020 water use targets, as required by the WC Act, and documents the City’s success in meeting the City’s 2020 water use targets.
The fundamental determination of the UWMP is that the City has or will have sufficient water resources to meet the City’s projected growth over the next 25 years under all anticipated hydrologic conditions, although customers should expect some demand reductions during dry years to ensure demands align with the City’s water supply.
Service Area Overview
The City of Santa Rosa is the largest city between Portland, Oregon and San Francisco, California. Within the City’s service area, employment is diversified across the public sector and the service and manufacturing industries, with a broad spectrum of commercial services such as technology, engineering, and construction.
The City’s climate is influenced by the Pacific Ocean and is divided into wet and dry seasons. Approximately 93 percent of the annual precipitation normally falls during the wet season, Oc tober to May, with a large percentage of the rainfall typically occurring during three or four major winter storms.
The City has received the majority of its potable water supply from Sonoma Water (formerly the Sonoma County Water Agency) since the early 1960s. Sonoma Water provides water principally from the Russian River to the majority of the retail water providers in Sonoma County, and to a lesser degree in Marin County.
The City also receives water supply from its own groundwater wells and provides recycled water from the Regional Water Reuse System (Regional System) to some urban Santa Rosa irrigators.
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The City receives potable surface water from Sonoma Water through a series of turnouts, check valves, and direct connections serving City pump stations along Sonoma Water’s Santa Rosa and Sonoma Aqueducts.
There are 59 physical connections between the City ’s distribution system and Sonoma Water’s system, including 39 pressure reducing valves, 16 check valves, and 4 pumping stations. The City’s major water distribution facilities consist of 652 miles of main, 21 treated water reservoirs, 20 water pump stations (plus one additional station not in use), and one well treatment facility.
Water Use Projections
Chapter 4 of this UWMP discusses the City’s future water needs. To determine projected water demands through 2050, the City in conjunction with the other Water Contractors who receive water from Sonoma Water, hired EKI Environment and Water, Inc. (EKI) to perform the demand analysis. The projected demands are based on the forecasted growth rates for population and employment published in 2018 in the Association of Bay Area Governments (ABAG) Plan Bay Area Projections 2040, in context with recent historical populatio n estimates. The projected demands also include implementation of the National Standard Plumbing Code, State Plumbing Code, as well as accounting for authorized unbilled uses (for activities such as firefighting and line flushing) and water losses from the potable water system (real loss from the distribution system and apparent loss due to billing errors, etc.). Table ES-1 summarizes actual water use for the City in 2025 and demand projections for 2030 through 2050.
TABLE ES-1: TOTAL PROJECTED WATER USE (POTABLE AND NON-POTABLE), AF Demand Component 2025 2030 2035 2040 2045 2050 (a)
Potable Water 16,790 19,613 19,921 20,313 20,765 21,263 Recycled Water 74 140 140 140 140 140
Total Water Use 16,864 19,753 20,061 20,453 20,905 21,403 (a) State law requires suppliers to span a 20-year planning horizon to 2045 for their 2025 UWMPs and recommends, but does not require, a 25-year planning horizon (to 2050). The City chose to use a 25-year horizon for this 2025 UWMP. (b) 2025 reflects actual consumption, except for real losses, apparent losses, and other authorized unbilled uses which were estimated from the calendar year 2024 water loss audit. 2030-2050 reflect projected demands as described in Appendix D.
Water Conservation Overview
The City has been and continues to be a leader in implementing innovative water conservation programs.
Water conservation and demand management are essential elements of the City’s long -term water management strategy. The City integrates water conservation into future supply and demand solutions for both the water system and the wastewater treatment/reuse system. The City has received statewide recognition for its robust conservation programs. Chapter 9 provides additional details about these programs.
Water Supply Characterization
Chapter 6 of this UWMP assesses the City’s potable and non -potable water supplies over short -term and long-term planning horizons. It also includes an analysis of the availability of each source through 2050 under the following hydrologic conditions: normal water year, single -dry water year, and a drought lasting five years. It also considers water supplies in a near -term drought (2026-2030) and longer-term issues like climate change and regulatory revisions. The analysis examines each water source separately and then
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aggregates the information into a comprehensive picture of the City’s current and future water supply reliability.
The City has three existing sources of water supply:
1. Entitlement from Sonoma Water for potable water (Section 6.1)
2. Groundwater from City’s potable water wells (Section 6.2)
3. Recycled water (non-potable) from the Santa Rosa Regional Water Reuse System (Section 6.3) The City receives approximately 95 percent of its potable water supply from Sonoma Water under the provisions of the Restructured Agreement for Water Supply (Restructured Agreement), which was executed in June 2006. Approximately 99 percent of water delivered by Sonoma Water is from surface water sources, with the remainder from groundwater. Section 6.2 describes the City’s entitlement of 29,100 AFY from Sonoma Water in more detail. Sonoma Water anticipates being able to meet the obligation to deliver 29,100 AFY out to 2050 under normal water year conditions. Chapter 7 discusses dry year conditions and anticipated water supplies in more detail.
The City produces approximately seven percent of its potable water supply from groundwater wells. Section
6.3 describes in more detail the City’s potable wells which can currently provide up to 2,300 AFY. The Santa Rosa Plain groundwater basin and its sub basins have not been identified as overdrafted and are not anticipated to become overdrafted basins. Starting in 2035, the City anticipates being able to produce 3,100 AFY of groundwater under normal and dry water year conditions, and in 2040, up to 4,100 AFY with the addition of new groundwater sources. Chapter 6 discusses dry year conditions and anticipated groundwater supply in more detail.
The City offsets less than one percent of total demand for potable water in the urban system with recycled water. The City owns and operates the Santa Rosa Regional Water Reuse System (Regional System), which produces recycled water that is approved by the State for non-potable uses. The Regional System recycles nearly all of its treated wastewater, with the majority being used for the Geysers Recharge Project. In recent years, the City’s urban water system has used an average of 98 AFY of recycled water for landscape irrigation (2021-2025). The City is not planning to expand the recycled water system within the City water service area for the duration of the planning period of this 2025 UWMP. Section 6.4 describes in more detail the City’s recycled water which can provide up to 140 AFY for urban non-potable uses.
Relying on the Water Supply Alternatives Plan described further in Chapter 6, the City has plans to add new sources of water to meet future water demand ( Section 6.9). Additionally, the City has implemented a robust water conservation program which has reduced water demand over the past 35 years and ensures that future water use is efficient. The City’s water conservation programs are discussed in Chapter 9 and analyzed in the Water Demand Analysis (Appendix D).
The City’s current and projected water supplies are summarized in Table ES-2.
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TABLE ES-2: CURRENT AND PROJECTED WATER SUPPLIES, AF
Source Additional
Detail
2025
Actual 2030 2035 2040 2045 2050
Purchased or Imported Water Potable
(contract) 15,846 29,100 29,100 29,100 29,100 29,100
Groundwater (not desalinated) Potable
(City) 1,326 2,300 3,100 4,100 4,100 4,100
Recycled Water Non-potable
(City) 74 140 140 140 140 140
Total 17,246 32,340 33,340 33,340 33,340 33,340
Water Service Reliability
Chapter 7 of this UWMP describes the long term reliability and vulnerability of the City’s potable and non- potable water supplies under varying conditions. It considers the City’s ability to meet water needs through 2050 under normal conditions, single -dry year conditions, and a five consecutive dry year period. In addition, this chapter meets the requirement to provide a Drought Risk Assessment (DRA) which considers water supply and demand under the assumption that the next five years (2026 -2030) will experience a drought that is hydrologically equivalent to the driest five consecutive years on record. The wate r service reliability assessment through 2050 and the DRA for 2026 -2030 combine the details of the water use analysis in Chapter 4 and the water supply analysis in Chapter 6 of this UWMP.
The City’s planned and implemented water management tools for increasing the reliability of water supplies through 2050 are also addressed. Shorter term reliability responses for scenarios that may require immediate action during dry periods or a catastrophic supply interruption are addressed in the 2025 Water Shortage Contingency Plan (Shortage Plan) included in Appendix E. Ongoing water use efficiency programs that help ensure water is used wisely by customers during all water supply conditions are discussed in Chapter 9 Demand Management Measures.
A summary of the water service reliability assessment findings is listed below . • The City does not anticipate legal, environmental, or water quality factors will affect the reliability of its water supplies within the planning horizon of this UMWP. • The City anticipates that climate change and drought conditions could result in a reduction of surface water supply 1. Although the City does not supply surface water directly, it does receive surface water supply from Sonoma Water which is subject to reductions during dry years (seasonal and climatic shortages) pursuant to State Water Board’s Decision 16102. When the volume of water stored in Lake Sonoma (total volume 381,000 acre feet (AF); water supply pool 245,000 AF) is less than 100,000 AF prior to July 15th, a 30 percent reduction in diversions from the Russian River is required. Such a reduction in So noma Water diversions may result in a reduction in deliveries to the City under the Restructured Agreement.
1 Sonoma Water 2025 UWMP.
2 SWRCB Decision 1610 was adopted in April 1986 and specifies minimum streamflow requirements for Sonoma Water’s various water rights for diversion, re-diversion, and storage.
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• In normal years, water supply will be sufficient to meet increasing demand through 2050. • In dry five -year periods that are equivalent to the driest five -year period on record (1987 -1991), water supply will be sufficient to meet increasing demand through 2050. • In the immediate five years (2026 -2030), water supply will be sufficient to meet demand even if water conditions are equivalent to the driest five-year period on record (1987-1991). • While supply volumes are shown to exactly meet demand during single dry year water shortages, it is anticipated that additional water would remain stored in Lake Sonoma to meet future demands.
Sonoma Water can store 245,000 AF of water supply in Lake Sonom a and can divert up to 75,000 AFY for water supply purposes under current water rights permits. • In addition, the City’s water use efficiency programs have helped ensure water is used wisely by customers during all water supply conditions. These programs have helped the City reduce water use in Santa Rosa by 12,016 AF between 2010 and 2024. Together, with National and State Plumbing codes and building regulations, the City’s per capita demand for potable water has decreased 50 percent over the past 35 years, decreasing from 177 GPCD in 1990 to 80 GPCD in 2025. Total water use went down 24 percent, decr easing from 22,494 AF in 1990 down to 17,172 AF in 2025, despite an increase in population of 54 percent. The City’s water use efficiency efforts are discussed in more detail in Chapter 9.
Water Shortage Contingency Plan
Chapter 8 and Appendix E of this UWMP document the City’s Water Shortage Contingency Plan (Shortage Plan) that will be used when available supplies are not sufficient to meet normal water demands. A water shortage may occur due to several reasons, such as drought, climate change, regulatory constraints, natural or human caused disasters, and catastrophic events which may occur at any time. The Shortage Plan is the City’s operating manual that allows the City Council, staff, and the public to identify and efficiently implement pre-determined steps to manage a water shortage.
Initial recommendations for t rigger points determining water shortage conditions on the Russian River system are made by Sonoma Water, and water shortage provisions for the Sonoma Water system are governed by the Restructured Agreement. For the City and the other parties to the Restructured Agreement, the shortage provisions are defined in Section 3.5 of that agreement, and further defined in the Water Shortage Allocation Methodology (Shortage Methodology). Together, these are designed to take into account the demand hardening associated with water conservation. The City continues to implement aggressive water conservation programs and has one of the lowest per capita water uses among all of Sonoma Water’s Water Contractors.
To address any future water supply shortages, the City has identified eight water shortage stages and developed corresponding demand reduction measures to address the severity of the supply restriction (see Sections 4 and 5 of the Shortage Plan included in Appendix F). The appropriate stage is determined by City staff and elected officials using the procedures and timeline described in Section 3 of the Shortage Plan.
The full Shortage Plan is included in Appendix F. The following is a concise summary of the key requirements met by the City’s Shortage Plan:
• Section 1: Introduction provides an overview of the Shortage Plan
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• Section 2: Water Service Reliability Assessment summarizes key elements of the water supply reliability analysis conducted for the City’s 2020 Urban Water Management Plan. [Water Code Section 10632(a)(1)]
• Section 3: Procedures for Annual Water Supply and Demand Assessment outlines the process that the City will use to conduct assessments each year to determine if a shortage exists or is anticipated and provides written decision making steps for any subsequent actions. [Water Code Section 10632 (a)(2)]
• Section 4: Water Shortage Stages describes the City’s eight water shortage levels and illustrates how these align with the State’s six standard water shortage levels. [Water Code Section 10632 (a)(3)(A)]
• Section 5: Shortage Response Actions describes the shortage response actions that the City will implement for each shortage level and estimates the extent these actions will address the gap between supplies and demands. [Water Code Section 10632 (a)(4)] • Section 6: Communication Protocols explains the procedures that the City will use to inform customers, the public, and government entities of any current or predicted water shortages and associated response actions. [Water Code Section 10632 (a)(5)]. • Section 7: Compliance and Enforcement details the means that the City will use to ensure compliance with and enforcement of triggered shortage response actions and describes appeal and exemption procedures. [Water Code Section 10632 (a) (6)] • Section 8: Legal Authorities describes the legal authorities that will empower implementation of the City’s shortage response actions during water shortage emergencies. [Water Code Section 10632 (a)(7) and Division 1, Section 350]
• Section 9: Financial Consequences of Water Shortage Contingency Plan provides a discussion of the potential revenue reductions and expense increases associated with activating shortage response actions and describes the City’s mitigation actions. [Water Code Section 10632 (a)(8) • Section 10: Monitoring and Reporting summarizes how the City will ensure appropriate data is collected to monitor customer compliance and respond to state reporting requirements. [Water Code Section 10632(a)(9)]
• Section 11: Shortage Plan Refinement Procedures describes steps the City will take to assess the functionality of the Shortage Plan and make appropriate adjustments as may be warranted. [Water Code Section 10632(a)(10)]
• Section 12: Plan Adoption, Submittal, and Availability outlines how the City will adopt, submit, implement, and amend (if necessary) the Shortage plan, and how the City will make it publicly available. [Water Code Section 10632 (a)(c)]
Demand Management Measures
Chapter 9 of this UWMP provides an overview of the City’s water use efficiency programs to promote conservation and reduce demands on water supplies. It also provides a description of and information about the status of implementation of Demand Management Measures (DMMs) listed below. In addition, it discusses implementation of DMMs to achieve water use targets and State standards for assessing and managing distribution system water loss. The DMMs are integral not only to the City’s long term water
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supply planning efforts but are also central to the effectiveness of the City’s Shortage Plan, which has been summarized in Chapter 8 and provided in detail in Appendix F. Additionally, a comprehensive analysis of the effectiveness of key programs can be found in Appendix D (EKI report).
The demand management measures described in Chapter 9 include:
• Water Waste Prevention Ordinance
• Metering
• Conservation Pricing
• Public Education and Outreach
• Programs to Assess and Manage Distribution System Real Loss • Water Conservation Program Coordination and Staffing Support • Other Demand Management Measures
2025 UWMP Organization
The City’s 2025 UWMP is organized as follows:
• Chapter 1 provides background information on the UWMP, how the UWMP is organized, and regulatory changes that have occurred since adoption of the 2020 UWMP. • Chapter 2 provides an overview of UWMP requirements, units of measure, coordination and outreach processes, and public noticing.
• Chapter 3 provides a general description of the City’s water system and service area, City and Sonoma Water facilities, and general information on climate change. • Chapter 4 describes historical, current, and projected water demands, future conservation savings, and the City’s response to climate change.
• Chapter 5 addresses the requirements of the WC Act, year 2020 target compliance, and the Regional Alliance.
• Chapter 6 discusses water supplies (Sonoma Water, groundwater, and recycled water) and provides a description of the Regional System.
• Chapter 7 provides an overview of water supply reliability and potential impacts on various supply sources.
• Chapter 8 provides a brief overview of the City’s Shortage Plan, and points to Appendix F for the whole Shortage Plan.
• Chapter 9 discusses the City’s DMMs, including its long-standing conservation programs and other measures.
• Chapter 10 describes the public hearing and adoption process, submittal of the UWMP, and UWMP availability.
• Appendix A through Appendix F provide relevant supporting documents including the City’s Shortage Plan (Appendix E).
City of Santa Rosa 1-1 2025 Urban Water Management Plan June 2026
1. INTRODUCTION
This chapter provides an introduction and overview of the City of Santa Rosa (City) 2025 Urban Water Management Plan (UWMP) including the importance and extent of the City’s water management planning efforts, regulatory changes since the preparation of the City’s 2020 UWMP, and the organization of the City’s 2025 UWMP. This 2025 UWMP has been prepared jointly by City staff and Woodard & Curran.
1.1 Introduction
The Urban Water Management Planning Act (UWMP Act) was originally established by Assembly Bill (AB) 797 on September 21, 1983. Passage of the UWMP Act was recognition by state legislators that water is a limited resource and a declaration that efficient wa ter use and conservation would be actively pursued throughout the state. The primary objective of the UWMP Act is to direct “urban water suppliers” to develop a UWMP which provides a framework for long -term water supply planning, and documents how urban water suppliers are carrying out their long-term resource planning responsibilities to ensure adequate water supplies are available to meet existing and future water demands.
1.2 Importance and Extent of City’s Water Management Planning Efforts The purpose of the UWMP is to provide a planning tool for the City for developing and delivering municipal water supplies to the City’s water service area. This UWMP provides the City a water management action plan for guidance as water conditions change and management conditions arise.
From 1873 until 1947, the City and the privately held Santa Rosa Water Works provided drinking water to residential, commercial, and institutional customers in Santa Rosa. The earliest water system (Santa Rosa Water Works) was fed from Santa Rosa Creek and from the then -newly constructed Lake Ralphine. The City’s municipal water system began in 1893 by pumping water out of Santa Rosa Creek at the north end of Farmers Lane. The two systems were combined in 1947 and the City has been the sole water supplier t o City customers since that time. Between 1948 and 1958, the City constructed eight groundwater supply wells, and by June 1959, the City’s water supply was primarily from groundwater wells, supplemented by surface water supplies from Lake Ralphine. During the 1950s, the City participated in the financing of the water supply infrastructure of the Sonoma County Flood Control and Water Conservation District, which later became the Sonoma County Water Agency (now known as Sonoma Water). In June of 1959, the Cit y connected to the Sonoma Water aqueduct and placed the City’s water supply facilities in standby mode.
Currently, the City has three sources of water supply: contractual entitlements to surface water from Sonoma Water, groundwater, and recycled water. Lake Ralphine is not currently used as a potable water supply source.
To continue to meet the water needs of the community, the City carefully manages its available water resources. The City’s UWMP is a comprehensive guide for planning for a safe and adequate water supply for the next 25 years.
1.3 Changes from 2020 UWMP
The UWMP Act has been modified over the years in response to the State’s water shortages, droughts, and other factors. Relative to the significant changes incorporated into the California Water Code ( CWC) that
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impacted the 2010, 2015, and 2020 UWMPs, there are relatively few changes since 2020 that impact the 2025 UWMP.
Summarized below are the major additions and changes to the CWC since the City’s 2020 UWMP was prepared.
• Nonfunctional Turf [CWC Section 10608.14 and Section 110]. Prohibits the use of potable water for irrigation of nonfunctional turf, with phase-in of prohibitions across 2027-2031 based on various property types.
• Urban Water Use Objectives and Water Use Reporting [CWC Section 10609.4]: Codified the indoor residential water use standard as part of the “Making Conservation a California Way of Life” regulations.
Neither of the CWC changes above relate to any specific requirements within the 2025 UWMP. For more information on both of these changes, please refer to Chapter 9 (Demand Management Measures) for more information.
1.4 Plan Organization
This 2025 UWMP contains the appropriate Sections and tables required per CWC Division 6, Part 2.6 (Act), and has been prepared based on guidance provided by the California Department of Water Resources (DWR) in their “Urban Water Management Plan Guidebook 2025” (DWR Guidebook).
This 2025 UWMP is organized into the following chapters:
Chapter 1: Introduction
Chapter 2: Plan Preparation
Chapter 3: System Description
Chapter 4: Water Use Characterization
Chapter 5: SB X7-7 Baselines, Targets and 2020 Compliance Chapter 6: Water Supply Characterization
Chapter 7: Water Service Reliability and Drought Risk Assessment Chapter 8: Water Shortage and Contingency Planning
Chapter 9: Demand Management Measures
Chapter 10: Plan Adoption and Submittal Implementation
This 2025 UWMP also contains the following appendices of supplemental information and data related to the City’s 2025 UWMP:
Appendix A: Adoption Resolution for 2025 Urban Water Management Plan and 2025 Water Shortage Contingency Plan
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Appendix B: Public Notices for Urban Water Management Plan and Water Shortage Contingency Plan Appendix C: Department of Water Resources Reporting Tables Appendix D: Water Demand Analysis
Appendix E: Water Shortage Contingency Plan
Appendix F: Department of Water Resources Urban Water Management Plan Checklist Furthermore, this 2025 UWMP contains all the tables recommended in the DWR Guidebook, both embedded into the UWMP chapters where appropriate and included in Appendix C.
DWR’s Urban Water Management Plan Checklist, as provided in the DWR Guidebook, has been completed by Woodard & Curran to demonstrate the plan’s compliance with applicable requirements. A copy of the completed checklist is included in Appendix F.
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2. PLAN PREPARATION
This chapter describes the preparation of the City’s 2025 Urban Water Management Plan (UWMP) and 2025 Water Shortage Contingency Plan ( Shortage Plan ), including the basis for the preparation of the plans, individual or regional planning, basis of reporting year (calendar versus fiscal), units of measure, and plan coordination and outreach.
2.1 Basis for Preparing a Plan
The UWMP Act requires every “urban water supplier” to prepare and adopt an UWMP, review its UWMP at least once every five years, and make any amendments or changes which are indicated by the review. An “urban water supplier” is defined as a supplier, eithe r publicly or privately owned, providing water for municipal purposes either directly or indirectly to more than 3,000 customers or supplying more than 3,000 AFY.
The City’s water system qualifies under the California Health and Safety Code, Section 116275, as a “Public Water System” (PWS) that provides drinking water for human consumption. The City manages PWS CA4910009, which is regulated by the State Water Resources Control Board, Division of Drinking Water. The City operates a single, retail drinking water system, which receives water from a wholesale supplier and from the City’s groundwater wells. The City’s public water system does not supply raw or treated dri nking water to another agency.
In accordance with the CWC, an urban water supplier with 3,000 or more service connections or supplying more than 3,000 AFY of water is required to prepare an UWMP every five years with a planning horizon spanning at least 20 years. The State recommends, b ut does not require, a 25 -year planning horizon. As shown in Table 2-1, the City provided water to 55,851 service connections and supplied 17,172 acre -feet of potable water in 2025. Therefore, the City is an urban water supplier and required to prepare an UWMP.
The City’s last UWMP, the 2020 UWMP, was adopted by the City Council in June 8, 2021. The City chose to use a 25-year planning horizon out to 2050 for this 2025 UWMP.
TABLE 2-1: PUBLIC WATER SYSTEMS (DWR TABLE 2-1 RETAIL)
Public Water System
Number
Public Water System
Name
Number of Municipal
Connections 2025
Volume of Water
Supplied 2025 (AF)
CA4910009 City of Santa Rosa 55,851 17,172
Total 55,851 17,172
NOTES: Volumes are in AF. Potable water only. Recycled water connections not included.
2.2 Regional Planning
CWC provides mechanisms for participating in area wide, regional, watershed, or basin wide urban water management planning. Water suppliers who receive water from a shared wholesale supplier may choose to form an alliance to comply on a regional basis with the Water Conservation Act (WC Act) of 2009.
A group of water suppliers agreeing among themselves to plan, comply, and report as a region on the requirements of the SB X7-7 is referred to as a “Regional Alliance.” Each Regional Alliance develops and
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demonstrates meeting its own set of 2025 Urban Water Use Targets. A Regional Alliance allows water suppliers to work toward cooperatively developing programs and meeting regional water conservation targets but not necessarily submitting a Regional Plan. Be ing a member of a Regional Alliance does not take the place of submitting an UWMP.
Per DWR guidance, each Regional Alliance must develop regional Urban Water Use Targets. Additionally, a Regional Alliance may either be a part of a Regional UWMP (RUWMP) or may be a group of suppliers that submit a Regional Alliance Report and individual U WMPs. The Regional Alliance’s water use targets are discussed in Chapter 5. The City has prepared an individual UWMP and will not adopt an RUWMP.
The Water Contractors of Sonoma Water formed a Regional Alliance for SB X7 -7 compliance purposes, consisting of the following urban water suppliers: Cities of Santa Rosa, Cotati, Petaluma, Rohnert Park, Sonoma, and the Town of Windsor, and Marin Municipal, North Marin, and Valley of the Moon Water Districts. Based on an evaluation of 2025 water demand and population data, it has been determined that the Regional Alliance has met its collective 2025 regional target. Additional SB X7 -7 information can be found in Chapter 5. A copy of the letter to DWR regarding the formation of the Regional Alliance, as well as the letter agreement forming the Regional Alliance in 2011, is included in Appendix G of the previous 2020 UWMP.
2.3 Individual or Regional Planning and Compliance
As shown in Table 2-2, the City’s 2025 UWMP has been prepared on an Individual Reporting basis, covering only the City’s service area. As described below in Section 2.5, the City has notified and coordinated with appropriate regional agencies and constituents, including Sonoma Water, other Agency contractors, as well as several local agencies in compliance with the UWMP Act.
TABLE 2-2: PLAN IDENTIFICATION (DWR TABLE 2-2)
Select
One Type of Plan Name of Regional Alliance or
RUWMP
Individual UWMP
If Water Supplier is also a member of a SB X7-7
Regional Alliance, select name from the drop-down. North Marin-Sonoma Alliance Regional Urban Water Management Plan (RUWMP)
If Supplier selected RUWMP, select name from the
drop-down.
NOTES: Regional Alliance includes City of Santa Rosa, eight other Sonoma County Water Agency contractors including Marin Municipal Water District.
2.4 Fiscal or Calendar Year and Units of Measure
The City prepared this 2025 UWMP on a calendar year basis, with the calendar year starting on January 1 and ending on December 31 of each year. As required for UMWPs for the year 2025, the City has included
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water use and planning data for the entire calendar year of 2025. The City reports water volumes in units of acre-feet (AF) in this plan. The City’s reporting methods for this 2025 UWMP are summarized in Table 2-3.
TABLE 2-3: SUPPLIER IDENTIFICATION (DWR TABLE 2-3)
Type of Supplier
Supplier is a wholesale supplier
Supplier is a retail supplier
Fiscal or Calendar Year
UWMP Tables are in calendar years
UWMP Tables are in fiscal years
Units of measure used in UWMP
Unit AF
2.5 Coordination And Outreach
The UWMP Act requires the City to coordinate the preparation of its plan with City departments and other appropriate agencies, including other water suppliers that share a common source, water management agencies, and relevant public agencies. The City’s coordination efforts are summarized below.
2.5.1 Wholesale and Retail Coordination
The City is a water retailer. The City receives wholesale water from Sonoma Water. In accordance with CWC Section 10631, the City has informed Sonoma Water of projected water use from that source in five year increments through 2050. Sonoma Water provided information to the City, identifying and quantifying water supplies available for the same period, under normal water year, single -dry year, and dry five -year periods, as well as for the DRA for the next five years 2026-2030 (see Section 7.3).
TABLE 2-4: WATER SUPPLIER INFORMATION EXCHANGE (DWR TABLE 2-4 RETAIL) The retail Supplier has informed the following wholesale supplier(s) of projected water use.
Wholesale Water Supplier Name
Sonoma County Water Agency (Sonoma Water)
2.5.2 Coordination with Other Agencies and the Community Water suppliers must coordinate the preparation of their UWMP with other appropriate agencies in the area, to the extent practicable. The City coordinated the preparation of this UWMP with several agencies
City of Santa Rosa 2-4 2025 Urban Water Management Plan June 2026
including the eight other neighboring Sonoma Water contractors, the Santa Rosa Regional System (wastewater utility), and the City’s Planning and Economic Development Department. These and other agencies, as well as the public, participated in the coordination and preparation of this 2025 UWMP. In addition, the City coordinated the preparation of the water demand projections in this UWMP with the City’s Planning and Economic Development Department and relied on data from the 2050 Santa Rosa General Plan.
The City encouraged community and public interest and involvement in the 2025 UWMP update through outreach in its water bills, City newsletter, public meetings of the City’s Board of Public Utilities (BPU) and its Water Conservation Subcommittee, and public meetings of the City Council, including a public hearing.
Copies of the City’s public hearing notices are included in Appendix B.
For 30 days prior to the public hearing, copies of the draft UWMP and draft Shortage Plan were made available for public inspection electronically and in hard copy at two City facilities. The public review period and the public hearing provided an opportunity for all City water users and the general public to become familiar with the Plan and to ask questions about its existing water supply and its plans for providing a reliable, safe, high quality water supply over the upcoming 25 years.
Table 2-5 lists the organizations that were notified and solicited for input in UWMP preparation.
TABLE 2-5: COORDINATION AND NOTIFICATION FOR PLAN PREPARATION Organization/
Agency Name
Level of Participation
Participated in
Developing the
Plan
Commented on
the Draft
Attended Public
Meetings
Was Sent a Copy
of the Draft Plan
Sonoma Water x x x x
Sonoma County Local Agency
Formation Commission x
Sonoma County Permit and
Resource Management
Department
x
Santa Rosa Plain Groundwater
Sustainability Agency x
Neighboring water providers(a) x x x x
Santa Rosa Regional Water
Reuse System x x x
General public x x x x
(a) Neighboring water providers included the Cities of Rohnert Park, Petaluma, Cotati, Sebastopol, and Sonoma; Town of Windsor; and the North Marin, Marin Municipal, and Valley of the Moon Water Districts.
2.5.3 Notice to Cities and Counties
CWC Section 10621(b) requires a water supplier to notify the cities and counties within which the supplier provides water at least 60 days in advance of the public hearing that the City’s UWMP is being updated and
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reviewed. Although the City only provides water within the City’s boundary, such notice of preparation was sent to the cities, the County of Sonoma, Sonoma Water, and other stakeholders on January 20, 2026, to inform them of the UWMP update process and sch edule, and to solicit input for the 2025 UWMP and the 2025 Shortage Plan. The notifications, as well as the public hearing notifications and the public hearing and adoption, are discussed in Chapter 10.
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3. SYSTEM DESCRIPTION
This chapter describes the City’s water system, service area, and climate. It outlines the City’s current and historical water supply sources and water distribution infrastructure. It also provides information on current demographics, projected future popu lation, current and projected future land uses, and potential impacts of climate change on the City’s water management planning.
3.1 General Description
Located at the intersection of Highway 101 and Highway 12, Santa Rosa lies approximately 50 miles north of San Francisco and 30 miles east of the Pacific Ocean. Santa Rosa serves a four-county region as the hub for technology and entrepreneurial businesses , retail, banking, and employment. The City has a dynamic and well-balanced economy anchored by tourism, high-tech manufacturing, and retail .3 Santa Rosa was founded in 1833 and recognized by the State as an incorporated City in 1868. By City Charter, the City is governed by an elected City Council. The City Charter also stipulates that the City’s water system is to be overseen by an appointed Board of Public Utilities (first seated in 1924).
When the City was incorporated in 1868, it had an area of about one square mile and 900 residents. Since that time, Santa Rosa has evolved into a commercial, financial, medical, and industrial center of the North Bay (a subregion of the San Francisco Bay A rea). Santa Rosa is the county seat for Sonoma County and home to the region’s state and federal offices. With an area of approximately 45 square miles and over 174,000 residents, Santa Rosa is also the largest city between San Francisco and Portland, Oreg on.
Land use within the City is primarily residential but also includes industrial, commercial, institutional and recreational land uses. Additional information about land use is provided in Section 3.6.
Santa Rosa employment is diversified across the public sector and the service and manufacturing industries, with a broad spectrum of commercial services such as technology, engineering, and construction.
Additionally, recreation and tourism are growing ind ustries. More broadly, regional employment in the agricultural industry is related to vineyards, livestock, orchards, silage crops, and timber; however, none of these agricultural enterprises are served by the City’s urban water system.
Since the adoption of the 2020 UWMP, the City has annexed four areas totaling 51.91 acres.
3.2 Service Area Boundary Maps
Within Santa Rosa’s urban service area, the City supplies potable water to residential, industrial, institutional, and commercial customers. No agricultural uses are supplied with City potable water. In addition to potable water service, the City provides recycled water for landscape irrigation, serving 32 urban recycled water connections. Details regarding the City’s water supply sources are included in Chapter 6.
The City’s current service area is the same as the City’s municipal boundary. Figure 3-1 depicts the City’s current and projected service area boundaries as well as major infrastructure assets including pump stations, storage tanks, and wells, which are described below. The City’s service area and voter -approved Urban
3 www.srcity.org
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Growth Boundary relative to Sonoma Water’s facilities are shown on Figure 3-2. Figure 3-3 shows the service area of the City’s urban recycled water distribution system. The City does not plan to expand the urban recycled water system during the planning period of this UWMP.
In the future, the City’s water service area may expand to the Urban Growth Boundary, as described in the City’s 2050 General Plan, which includes areas outside of the City’s current distribution system. While the City’s distribution system may expand to serve the Urban Growth Boundary at some point in the future, as noted in the City’s 2050 General Plan, it is not possible to predict the specific location or distribution of growth. Market trends and/or environmental constraints will direct this growth over time.
3.3 Water System History And Description
The history of the water system and a general description of water system facilities are provided below.
3.3.1 Water System History
From 1873 until 1947, the City was served by two separate potable water systems. Established in 1873, a privately owned and operated system called the Santa Rosa Water Company diverted water from Santa Rosa Creek and the newly constructed, privately owned Lake Ralphine. In 1893, the City began building a municipal water system to serve a portion of Santa Rosa with water pumped out of Santa Rosa Creek at the north end of Farmers Lane.
In 1947, the residents of Santa Rosa voted to issue bonds to improve the City’s municipal water system. As a result, the City purchased Santa Rosa Water Company from the private owner and integrated the acquired assets into the operation of the City’s muni cipal water system using bond funding. At that time, the City’s water system had 4,615 services and supplied 2,091 AFY of water from surface water, groundwater wells, and springs. The City has been the sole water supplier to City customers ever since .
Over the next decade, the City increased its water supply capacity by developing new wells. Between 1948 and 1958, the City constructed eight groundwater supply wells. By June 1959, the City’s primary water supply source was groundwater, supplemented by su rface water supplies from Lake Ralphine. During the 1950s, the City also participated in financing new water supply infrastructure of the Sonoma County Flood Control and Water Conservation District (District), which later became the Sonoma County Water Age ncy (now known as Sonoma Water).4
Figure 3-1 shows a map of the City’s existing water system. The following Figure 3-2 shows the City’s service area in the context of regional infrastructure. Figure 3-3 shows the City’s recycled water system.
4 Ibid.
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FIGURE 3-1: CITY OF SANTA ROSA EXISTING WATER SYSTEM
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FIGURE 3-2: CITY OF SANTA ROSA SERVICE AREA WITH ASSOCIATED SONOMA COUNTY WATER AGENCY INFRASTRUCTURE
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FIGURE 3-3: CITY OF SANTA ROSA URBAN RECYCLED WATER DISTRIBUTION SYSTEM
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In June of 1959, the City signed a contract with the District to purchase potable water diverted from the Russian River for the City’s municipal water supply. The City put its groundwater production wells on standby status and discontinued using local surf ace water diversions. The City transitioned Lake Ralphine into a recreational facility and has not used it as a water supply source since that time. By 1960, the City had 12,000 water connections and 31,721 residents.
Over the next six decades, the City gradually expanded its potable distribution system and infrastructure to ensure ongoing reliable service for its customers. The City has added water mains, pump stations, storage reservoirs (above ground tanks), and two groundwater wells (shifting them from standby status to active status). As of January 2024, the City’s potable water system has grown to over 54,000 water connections serving 174,890 residents.
The City also owns, maintains, and operates an urban recycled water distribution system which provides non-potable water for landscape irrigation for 32 connections. The source of recycled water is the Laguna Treatment Plant (owned and operated by the City ) which treats wastewater collected from homes and businesses from the City and other nearby municipalities. The City’s water recycling system is monitored by state, local, and federal agencies, and its recycled water meets or exceeds California standards for all recycled water uses except drinking water.
Currently, the City has two sources of potable water supply (surface water from Sonoma Water and groundwater from City wells), and one source of non -potable water supply (recycled water from the Regional System). Water supply sources are discussed in more detail in Chapter 6.
3.3.2 Water System Description
The City’s and Sonoma Water’s surface water, groundwater, and distribution system facilities are described below.
3.3.2.1 Surface Water System Facilities
The City’s potable water supply from Sonoma Water is predominantly surface water, which is diverted from the Russian River. Sonoma Water provides water to the City via the Santa Rosa and Sonoma Aqueducts that deliver water to the City's distribution system through turnouts at multiple locations across the City. In addition to surface water diverted from the Russian River, Sonoma Water supplements its water supply with groundwater wells located in the Santa Rosa Plain sub-basin. A description of Sonoma Water ’s supply quantity and quality are included in Section 6.1.
3.3.2.2 City Groundwater Facilities
The City is located within the Santa Rosa Plain sub-basin of the Santa Rosa Valley Groundwater Basin, located at the confluence of the Santa Rosa, Bennett, and Rincon Valleys.5 Although the City’s Urban Growth Boundary overlies portions of the Rincon Valley Sub basin and the Kenwood Valley Groundwater Basin, the City’s groundwater supply is derived exclusively from the Santa Rosa Plain Sub-basin of the Santa Rosa Valley Groundwa ter Basin. A thorough discussion of the groundwater basin and supply is provided in Section 6.2.
5 Department of Water Resources Bulletin 118, Groundwater Basin Descriptions, updated February 27, 2004.
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The City maintains a total of seven municipal groundwater wells within the Santa Rosa Plain Sub-basin of the Santa Rosa Valley Groundwater Basin. They are described as follows:
• Farmers Lane Wells No. 1 and 2: These two wells were changed from emergency to active status by the former California Department of Public Health (DPH) on July 20, 2005. The two wells are currently permitted by the California State Water Resources Control Board (SWRCB) Division of Drinking Water (DDW). These wells can provide up to 2,300 acre feet per year (AFY) and are the City’s only potable groundwater sources in active use. They have been used to supplement potable water supplies obtained from Sonoma Water, particularly during seasonally high demand periods; • Carley Well and Peter Springs Well: These two wells are operated primarily to provide water for landscape irrigation to an adjacent park, refilling Lake Ralphine, and irrigation of nearby school grounds. These wells are also permitted by DDW to operate and provide potable supply during an emergency outage condition;
• Farmers Lane Well No. 3: This well is only operated to provide minor amounts of landscape irrigation water supply to areas adjacent to the well;
• Leete Well: This well is only used to provide potable water during an emergency outage condition (as permitted by DDW). This well is currently out of service due to a casing separation; and • A Place to Play Well: This well is under construction and will only be used to provide potable water during an emergency outage condition (as permitted by DDW).
3.3.2.3 Sonoma Water Groundwater Facilities
Approximately 99 percent of water delivered by Sonoma Water is from the Russian River, with the remainder from groundwater.6 Sonoma Water supplements its surface water supply with three groundwater wells in the Santa Rosa Plain Sub-basin. These groundwater wells are located along Sonoma Water’s Cotati Aqueduct at Todd Road (SCWA-04), Sebastopol Road (SCWA-05), and Occidental Ro ad (SCWA-06) on the west side of the Santa Rosa Plain Sub-basin. All three wells are drilled to depths greater than 1,000 feet.
Because these wells feed into Sonoma Water’s Cotati Aqueduct, which provides no supply to the City, little or no groundwater from Sonoma Water is delivered to the City by Sonoma Water to meet the City’s 29,100 AFY of contractual supply entitlement under the Restructured Agreement for Water Supply. A full discussion of Sonoma Water’s groundwater supply is provided in Sonoma Water’s 2025 UWMP.
3.3.2.4 Non-Potable Water Distribution System
The City’s wastewater collection and treatment systems and its production and use of recycled water are discussed in detail in Section 6.3. As shown in Figure 3-3, the City distributes recycled water for landscape irrigation within its urban water service area to 32 connections serving multi -family residential customers, commercial customers, and institutional/governmental customers (parks, median strips, and offic e buildings). The source of recycled water is the Santa Rosa Regional Water Reuse System (Regional System), which is owned and operated by the City of Santa Rosa. The Regional System produces tertiary treated recycled water that is approved for non -potable reuse, under the authority of its National Pollution
6 Email from Marcus Trotta, Principal Geologist, Sonoma County Water Agency, January 28, 2020
City of Santa Rosa 3-8 2025 Urban Water Management Plan June 2026
Discharge Elimination System (NPDES) Permit. The City distributes and uses this recycled water for non - potable uses (landscape irrigation and dust control) within its urban jurisdiction under the SWRCB General Order for Recycled Water Use WQ-2016-0068-DDW.
3.3.2.5 Potable Water Distribution System
The City receives potable water from Sonoma Water through a series of turnouts, check valves, and direct connections along Sonoma Water’s Santa Rosa and Sonoma Aqueducts. There are 59 physical connections between the City’s distribution system and Sonoma Water’s system, including 39 pressure reducing valves, 16 check valves, and 4 pumping stations. The City’s major water distribution facilities consist of 652 miles of main, 21 treated water tanks (reservoirs), and 20 water pump stations (plus one additional pump station that is not in use). These facilities and the distribution pipelines are described in this section.
3.3.2.5.1 Storage
Twenty-one water storage tanks are located throughout the City’s water distribution system as shown on Figure 3-1. The storage capacity of each tank ranges from 0.1 to 4.0 million gallons (MG) for a total capacity of 22.1 MG.
3.3.2.5.2 Pump Stations
The City maintains and operates 20 water pump stations and one well treatment facility for delivery of water and to maintain water system pressure. Pump station capacities range from approximately 130 gallons per minute (gpm) to 5,000 gpm.
3.3.2.5.3 Distribution Pipelines
The City’s existing water distribution system is divided into 18 major pressure zones, and several smaller sub-zones, that are served by 652 miles of main, ranging in diameter from 4 to 24 inches. Most water connections are served via laterals from 6-inch to 12-inch diameter mains. Pipe materials include asbestos cement, polyvinylchloride (PVC), high -density polyethylene (HDPE), ductile iron, and cement mortar lined and coated steel. The pressure zones are shown on Figure 3-4.
City of Santa Rosa 3-9 2025 Urban Water Management Plan June 2026
FIGURE 3-4: CITY OF SANTA ROSA WATER PRESSURE ZONES
City of Santa Rosa 3-10 2025 Urban Water Management Plan June 2026
3.4 Service Area Climate
The City’s climate is influenced by the Pacific Ocean and is divided into wet and dry seasons. Approximately 93 percent of the annual precipitation normally falls during the wet season, October to May, with a large percentage of the rainfall typically occurring during three or four major winter storms. Winters are cool, and below-freezing temperatures occasionally occur. Average annual precipitation in the Santa Rosa area is
33.65 inches (see Table 3-1). Prevailing winds are from the west and southwest. Summers are warm, and the frost-free season is fairly long. Details about the City’s climate statistics and the potential effects of climate change are described below.
3.4.1 Climate Statistics
Water use within the City’s service area is dependent on various climate factors such as temperature, precipitation, and evapotranspiration (ET). Temperature and precipitation averages were obtained from the National Oceanographic and Atmospheric Administration’s National Centers for Environmental Information for Santa Rosa, California for 1991-2020.
ET describes the combined water lost through evaporation from the soil and plant transpiration. In general, the Reference Evapotranspiration (ET o) is given for turf grass, and then corrected for a specific crop type.
Local average ETo data was obtained from the California Irrigation Management Information System (CIMIS) Station 83 (Santa Rosa) for 1990-2025.
Table 3-1 includes monthly average ETo, rainfall, and temperatures for the City. These climate characteristics affect water management within the City’s service area.
City of Santa Rosa 3-11 2025 Urban Water Management Plan June 2026
TABLE 3-1: MONTHLY AVERAGE CLIMATE DATA SUMMARY
Month
Standard
Monthly Average
ETo, inches(a)
Average
Total Rainfall,
inches(b)
Average Temperature,
degrees Fahrenheit(b)
Maximum Minimum
January 1.19 6.26 59.7 38.4
February 1.84 6.49 63.6 40.0
March 3.14 4.9 66.9 41.9
April 4.40 2.34 70.6 43.9
May 5.56 1.45 74.5 47.8
June 6.26 0.34 80.2 51.1
July 6.43 0.05 81.6 52.1
August 5.60 0.05 83.0 52.5
September 4.58 0.21 83.9 51.0
October 3.26 1.58 78.9 47.6
November 1.62 3.67 67.1 42.0
December 0.99 6.24 58.6 38.2
Total 44.90 31.54 72.4 45.5
(a) Source: California Irrigation Management Information System, CIMIS Monthly Average ETo Report for Santa Rosa station 83 (downloaded May 7, 2025 for the full period of record available at the time of the download (1990-2025). (b) Temperature data from NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals (1991–2020), Santa Rosa station USC000047965. Precipitation data from NOAA NCEI, Santa Rosa station USC000047965, average total rainfall based on 1991–2020 climate normals, accessed August 13, 2025.
3.4.2 Potential Effects of Climate Change
The UMWP Act requires water suppliers to account for the impact of climate change on water supplies and supply reliability. A discussion of the effects of climate change on water demands, supplies, and reliability can be found in Chapter 4 (Water Use Characterization), Chapter 6 (Water Supply Characterization), and Chapter 7 (Water Service Reliability and Drought Risk Assessment). This section summarizes the discussions from these chapters below:
• Water Demand: Hotter days and nights, as well as a longer irrigation season, will increase landscaping and irrigation water needs. Peak water demands may also be impacted. • Water Supply: More extreme weather events such as hotter, longer drought periods have the potential to impact water supply and supply reliability. Water quality is not expected to decline. • Natural Disaster: Natural disasters will challenge water supplier operations in several ways: wildfires are expected to increase in intensity and frequency, droughts are expected to become deeper and longer, and floods are expected to become larger and more frequent.
Responding to climate change generally takes two forms: mitigation and adaptation. Mitigation is taking steps to reduce the contribution to the causes of climate change by reducing greenhouse gas (GHG)
City of Santa Rosa 3-12 2025 Urban Water Management Plan June 2026
emissions. Adaptation is the process of responding to the effects of climate change by modifying systems and behaviors to function in a warmer climate.
In the water sector, climate change mitigation is generally achieved by reducing energy use, using energy more efficiently and optimizing time of use , instituting capital improvements for infrastructure resiliency, and/or substituting fossil fuel-based energy sources for renewable energy sources. Because water requires energy to move, treat, use, and discharge, and require energy to heat by end users, water conservation results in energy conservation.
The Water Supply Alternatives Plan was accepted by the Santa Rosa City Council in late 2023 to enhance Santa Rosa’s water supply resiliency during future droughts and other catastrophic events. The Plan whittled down eighteen water supply options to three options to pursue now, and four additional to consider in the future depending on supply needed and other factors. The Plan is in implementation and more information about this process can be found at www.srcity.org/OurWaterFuture.
A discussion of the potential impact of climate change on water supply and demand is provided in Section
4.6. Additional discussion of the potential impact of climate change on water supply sources is provided in Section 6.9. A discussion of water demand management and water use efficiency is provided in Chapter
9. 3.5 Service Area Population And Demographics
The City’s service area population and other demographics are discussed below.
3.5.1 Service Area Population
The City’s water service area population primarily consists of full -time residents. Current and projected service area population is summarized in Table 3-2. The City’s current population estimate was derived from the 2050 General Plan which uses Census data from 2000 to 2021 and ABAG projections from 2025 to 2040. The 2050 General Plan estimates the City’s 2025 population to be 186,445 residents.
TABLE 3-2: RETAIL POPULATION CURRENT AND PROJECTED (DWR TABLE 3-1 RETAIL) Population
Served
2025 2030 2035 2040 2045 2050
186,445 204,795 213,615 223,060 232,923 243,222
NOTES: Source: Appendix D Demand Study Report Santa Rosa (EKI), Table 5-2
3.5.2 Other Social, Economic, and Demographics Factors
The State requires the inclusion of service area socioeconomic information as part of the system description in UWMPs. Although differences in household water use across sociodemographic groups in Santa Rosa have not been studied, the following social, eco nomic, and demographic information is being provided to comply with the regulation. The information was derived from the US Census Bureau’s profile of Santa Rosa for 2023.7
7 United States Census Bureau, American Community Survey, 2023 American Community Survey 1 -Year Estimates Profile for Santa Rosa, California. https://data.census.gov/profile/Santa_Rosa_city,_California?g=160XX00US0670098
City of Santa Rosa 3-13 2025 Urban Water Management Plan June 2026
• The average family size was 2.99.
• The median household income in Santa Rosa was $93,106, while 11.4 percent of all individuals and
13.7 percent of youth under the age of 18 lived in poverty. • The average employment rate was 64.3 percent.
• The owner-occupied housing unit rate was 56.4 percent. • The median gross rent was $2,072 per month.
• The median age was 41.6 years.
• Of persons 25 years or older in Santa Rosa, 34.0 percent had earned a bachelor’s degree or higher. • 13.1 percent had a disability and 5.1 percent did not have health insurance. • 19.3 percent of Santa Rosa residents were foreign-born.
3.6 Land Uses Within Service Area
During preparation of this UWMP, staff from the City’s Water Department coordinated with staff from the City’s Planning and Economic Development Department (the land use authority for Santa Rosa). Staff reviewed and gathered data from a range of sources (e .g., City records, County parcel data, and published reports by the Association of Bay Area Governments, the Metropolitan Transportation Commission, CDF, and State Department of Housing and Community Development) to compile information related to historic, current, and projected development projects, redevelopment initiatives, housing units by type (Single Family and Multi -Family), housing units by affordability, population, employment, and socio economic factors.
Table 3-3 summarizes the City’s current land uses. As shown, 82 percent of acreage has been developed, and 18 percent is vacant.
TABLE 3-3: CURRENT LAND USE WITHIN URBAN GROWTH BOUNDARY (A) Land Use Type Acres Percent
Single Family Residential 10,131.67 41%
Multi-Family Residential(b) 2,105.00 9%
Parks, Open Space, Creeks and Landscapes 3,626.00 15%
Institutional 1,941.58 8%
Commercial 1,382.61 6%
Industrial 1,093.05 4%
Vacant 4,411.57 18%
Total 24,691.48 -
(a) Does not include roads, parking, rail.
(b) Includes these land use designations: Multi-Family, Common areas, Senior living, and Mobile home parks.
Source: General Plan 2050, Housing Element, page 6-13
City of Santa Rosa 3-14 2025 Urban Water Management Plan June 2026
Published housing projections, provided in Table 3-4, anticipate a 36 percent increase in the number of units in Santa Rosa by 2050.
TABLE 3-4: HOUSING PROJECTIONS
2025 2030 2035 2040 2045 2050
73,671 82,161 86.242 90,612 95,175 99,940
2025 is based on actual total housing units from Department of Finance City/County Population and Housing Estimates E-5 (1/1/2025) for the City of Santa Rosa.
2050 is based on buildout (2050) estimates of housing units provided in Santa Rosa General Plan 2050. 2030-2045 was interpolated based on the same rate of growth in population estimated over the 2025-2050 period.
The City’s water records show that over the past ten years (2015-2024), 72 percent of all water delivered by the City has been consumed by the residential sector. Based on this, as well as land use and housing data, it appears that the residential sector h as been and will continue to be a central driver of total per capita water use for the City for the foreseeable future.
Water demand projections for 2025 through 2050 integrated the data, reports, and information discussed in this section, as well as other considerations. Appendix D has detailed descriptions of the data and methodologies used to develop growth scenarios and refine demand projections.
City of Santa Rosa 4-1 2025 Urban Water Management Plan June 2026
4. WATER USE CHARACTERIZATION
This chapter describes past, current, and projected water use through 2050 by water source and customer type. The terms “water use” and “water demand” are used interchangeably and refer to water conveyed by the City’s urban water distribution system and us ed by the City and its customers for any purpose. The Chapter discusses potable and non-potable water sources and outlines usage by sector, including water loss from the distribution system. Additionally, this chapter relates the likely impacts of climate change on water supply and usage and outlines the City’s mitigation and adaptation efforts in response to climate change.
4.1 Demand Analysis Methodology
This section focuses on the demand analysis and includes a realistic prediction of future potable and non- potable (recycled) water use based on the City’s past and current use, combined with considerations of anticipated trends in customer water use, population growth, employment projections, new development, land use planning data, plumbing code information, new reg ulations, and climate change. The demand projections address all sectors, including projections for all types of customer water sales as well a s authorized unbilled uses (for activities such as firefighting and line flushing) and water losses from the potable water system (real loss from the distribution system and apparent loss due to things such as billing errors). Potable water demands include water use projections for lower income residential demands.
Each water use sector was examined for a variety of factors, and then the information was aggregated into a comprehensive projection of customer water use through 2050. The total projections have been adjusted to account for anticipated “passive” water sav ings which result from new and existing local/state/federal ordinances and codes (such as the Model Water Efficient Landscape Ordinance, National Plumbing Code, CALGreen, and State Plumbing Code). To be conservative, the City did not reduce demand projecti ons to adjust for anticipated active water savings from future customer participation in the City’s ongoing water use efficiency program.
In support of this UWMP, EKI Environment and Water, Inc. (EKI) completed a detailed demand analysis which is summarized in this chapter where applicable. The full analysis by EKI, including a description of the methods used, is provided in Appendix D.
The demand analysis is also used in the assessments of water supplies in Chapter 6 and long term water system reliability in Chapter 7.
4.2 Non-Potable Versus Potable Water Use
The City’s potable water use and non-potable water use are served by different water supplies and have separate distribution systems. Therefore, past, current, and future water demands for potable water use and non-potable water use are discussed separately.
The City’s potable water supply consists of surface water and groundwater that is safe to drink and meets or exceeds all state and federal drinking water standards The City’s non -potable water supply consists of tertiary treated disinfected recycled water, which is municipal wastewater that has been treated to a specified quality to enable it to be used for non -potable (non-drinking water) applications such as urban landscape irrig ation. The City does not distribute other
City of Santa Rosa 4-2 2025 Urban Water Management Plan June 2026
types of non-potable water, such as untreated groundwater, remediated groundwater, or untreated surface water to its customers.
4.3 Past, Current, And Projected Water Use By Sector
The City delivers potable water to the following sectors: Single Family, Multi-Family, Commercial, Industrial, Institutional (and Governmental), Landscape, and Other (which includes municipal yard meter water service, construction water sales, and authorized unbilled uses such as firefighting and line flushing). The remaining potable water demand is captured in the distribution system loss sector described below in Section 4.3.4.
For this 2025 UWMP, the City uses the same definitions for each sector as suggested in the DWR Guidebook and provided below.
4.3.1 Water Use Sectors Listed in Water Code
The City’s potable water system serves these sectors:
• Single Family Residential: A single-family dwelling unit. A lot with a free-standing building containing one dwelling unit that may include a detached secondary dwelling. • Multi-Family Residential: Multiple dwelling units contained within one building or several buildings within one complex.
• Commercial: A water user that provides or distributes a product or service. • Industrial: A water user that is primarily a manufacturer or processor of materials, or an entity that is a water user primarily engaged in research and development. • Institutional (and Governmental): A water user dedicated to public service. This type of user includes, among other users, higher education institutions, schools, courts, churches, hospitals, government facilities, and nonprofit research institutions. • Landscape: Water connections supplying water solely for landscape irrigation. Such landscapes may be associated with multi-family, commercial, industrial, or institutional/governmental sites, but are considered a separate water use sector if the connection is solely for landscape irrigation. • Other: Any water demand that is not adequately described by the water sectors defined above, including firelines and temporary construction and yard meters.
The City delivers non -potable recycled water to the Landscape sector (already defined above) within its urban boundary.
Within its urban system, the City does not provide sales of water to the following three sectors identified and defined as follows in the DWR Guidebook:
• Sales to other agencies: Water sales made to another agency. • Saline water intrusion barriers, groundwater recharge, or conjunctive use, or any combination thereof.
• Agricultural: Water used for commercial agricultural irrigation.
City of Santa Rosa 4-3 2025 Urban Water Management Plan June 2026
4.3.2 Water Use Sectors in Addition to Those Listed in Water Code The City does not provide water to Water Use Sectors other than those listed in the Water Code.
4.3.3 Past Water Use
Past water use is provided for potable and non -potable supplies. These data were previously filed with the State DDW in mandated Public Water System Electronic Annual Reports.
The City’s past use of potable water is summarized in Table 4-1. Historic drought conditions and the COVID- 19 pandemic affected 2020-2022 water use. Following that, 2023 was an above average precipitation year.
Therefore, the City does not consider these years to be representative of normal potable water use for the City.
TABLE 4-1: PAST POTABLE WATER USE BY SECTOR, AF
Water Use Sector 2020 2021 2022 2023 2024
Single Family 9,863 8,449 7,958 7,983 8,562
Multi-Family 3,309 2,984 3,078 3,261 3,438
Commercial 2,020 2,078 2,046 2,035 2,056
Industrial 304 320 307 329 326
Institutional/Governmental 308 276 300 297 313
Landscape 1,991 1,482 1,224 1,286 1,590
Other (b) 93 109 114 712 81
Other Non-Revenue Water (apparent
losses, unbilled unmetered consumption)
(c)
246 211 202 204 216
Distribution System Water Loss (c) 1,135 862 459 918 567 Total 19,269 16,771 15,688 17,025 17,149
(a) The City’s urban water system does not provide potable water to agricultural customers. (b) Water use in the “Other” sector includes use from firelines, construction, and yard meters. Yard meters record a combination of potable and recycled water use, where recycled water makes up approximately 4% of total use. Annual water use records from yard meters are reduced by 4% to estimate the approximate potable water use. (c) From the American Water Works Association (AWWA) workbooks for the Water Loss Audit for each year.
The City’s past use of non-potable (recycled) water in its urban setting is summarized in Table 4-2.
City of Santa Rosa 4-4 2025 Urban Water Management Plan June 2026
TABLE 4-2: PAST NON-POTABLE WATER USE BY SECTOR, AF
Water Use Sector(a) 2020 2021 2022 2023 2024
Single Family — — — — —
Multi-Family — — — — —
Commercial — — — — —
Industrial — — — — —
Institutional/Governmental — — — — —
Landscape 110 117 97 112 89
Agriculture — — — — —
Other — — — — —
Losses(b) — — — — —
Total 110 117 97 112 89
(a) The City’s urban recycled water system serves connections that are dedicated to landscape irrigation. (b) The recycled water system has not undergone a distribution system water loss audit.
A summary of the City’s past use of potable and non-potable water use is summarized in Table 4-3.
TABLE 4-3: TOTAL PAST WATER USE, AF
Water Use Sector 2020 2021 2022 2023 2024
Potable 19,269 16,771 15,688 17,025 17,149
Non-Potable 110 117 97 112 89
Total 19,379 16,888 15,785 17,137 17,238
4.3.4 Distribution System Water Loss
The California Water Code requires water suppliers to include potable distribution system water losses for the preceding five years and to project potable water losses in five-year increments for at least 20 years in their 2025 UWMPs. Potable distribution system water losses (also known as “real losses”) are the physical water losses from a supplier’s potable water distribution system and storage facilities up to the point of delivery to customers. In the City’s distribution system, the customer water meter is the point of delivery.
This section discusses the City’s past, current (2025), and projected future potable distribution system water losses out to 2050.
As set forth in California Assembly Bill 1668 and Senate Bills 606 and 555, the State has adopted rules requiring urban retail water suppliers to meet volumetric performance standards for real water losses. These rules were adopted by the SWRCB in 2022 and became effective in 2023, with a compliance deadline of January 1, 2028.
City of Santa Rosa 4-5 2025 Urban Water Management Plan June 2026
The State has established a specific real loss target for each supplier, expressed in gallons per service connection per day. For the City, the assigned standard is 17.1 gallons per connection per day. 8 The City’s average real loss for 2020 -2024 is 13.4 gallons per connection per day. As such, the City anticipates it will achieve and maintain compliance with the State’s volumetric performance standard for water loss by 2028 as required. Section 9.2.6 provides additional information about the City’s programs for assessing and managing real water loss.
The City’s potable distribution system water losses for the preceding five years (2020-2024) were calculated annually using the AWWA Water Audit Method as required by the State with the adoption of Senate Bill 555 in 2015. As described in Table 4-4, the City submitted to the State an electronic copy of each annual audit of its potable distribution system’s water losses for the calendar years 2020 through 2024, using DWR’s online submittal tool. Each respective audit workbook can be downloaded directly from DWR’s submission portal using the links in the table notes.
TABLE 4-4: WATER LOSS AUDIT REPORTING (DWR TABLE 4-5 RETAIL) Public Water
System ID #
Reported in
Table 2-1 R
Reporting Period
(Calendar Year (CY))
Submitted to DWR Water Loss Audit
Program
CA4910009
2020 Yes
2021 Yes
2022 Yes
2023 Yes
2024 Yes
NOTES:
Calendar Year (CY) 2020: https://wuedata.water.ca.gov/public/awwa_uploads/2618390738/Santa%20Rosa%20City%20of%20%5F%202020.xlsx CY2021: https://wuedata.water.ca.gov/public/awwa_uploads/8844892203/Santa%20Rosa%20City%20of%20%5F%202021.xlsx CY2022: https://wuedata.water.ca.gov/public/awwa_uploads/4000196158/Final%20Santa%20Rosa%20City%20of%202022.xlsx CY2023: https://wuedata.water.ca.gov/public/awwa_uploads/6117261588/City%20of%20Santa%20Rosa%20CY2023%20%2D%20Validated%20Audit.xlsx CY2024: https://wuedata.water.ca.gov/public/awwa_uploads/5419845402/City%20of%20Santa%20Rosa%20CY2024%20%2D%20Validated%20Audit.xlsx As of the 2025 UWMP, urban water suppliers are no longer required to report the volume of water loss.
Instead, the City must confirm submittal of annual water loss audits to the DWR, report its assigned real loss performance standard, and indicate progress toward meeting the 2028 compliance deadline established by Senate Bill 555. These requirements apply specifically to real losses (physical leaks from the distribution system) and not to non -revenue water, which also includes apparent losses and unbilled authorized consumption. To project future potable water losses through 2050, the City projected real and apparent losses based on the gallons per day per connection values calculated in the calendar year 2023 audit which was the most recent at the time the demand projections were finalized. The per connection values were multiplied by projected connections in each forecast year.
8 State Water Resources Control Board, Individual System Water Loss Standards, August 7, 2025 (accessed online on 9 -8-2025) www.waterboards.ca.gov
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Table 4-5 summarizes real losses from the calendar year 2024 water loss audit and the City’s assigned standard. Table 4-6 summarizes apparent losses from the calendar year 2024 water loss audit and the City’s assigned standard.
TABLE 4-5: PROGRESS TOWARDS 2028 WATER LOSS STANDARD (DWR TABLE 4-6 RETAIL, REAL LOSS)
Public Water
System ID #
Reported in
Submittal
Table 2-1 R
Did the
Water Board
Calculate a
Water Loss
Standard for
this Public
Water
System?
State Water
Board Standard
Most Recent AWWA Water
Loss Audit
Real Water
Loss Per Unit
per Day
2028 Real
Water Loss
Standard per
Unit per day
Units for
Real Water
Loss
Number of
Connections
Volume of Total
Real Loss
(from AWWA
Water Loss
Audit) (AF)
CA4910009 Yes 17.1
Gallons per
Service
Connection
per Day
(GPSCD)
53,681 567.1 9.4
Notes: Most recent AWWA Water Loss Audit was for CY 2024.
TABLE 4-6: PROGRESS TOWARDS 2028 WATER LOSS STANDARD (DWR TABLE 4-6 RETAIL,
APPARENT LOSS)
Public Water
System ID #
Reported in
Submittal
Table 2-1 R
Did the
Water Board
Calculate a
Water Loss
Standard for
this Public
Water
System?
State Water
Board Standard
Most Recent AWWA Water
Loss Audit
Apparent
Water Loss
Per Unit per
Day
2028
Apparent
Water Loss
Standard per
Unit per day
Units for
Apparent
Water Loss
Number of
Connections
Volume of
Total Apparent
Loss
(from AWWA
Water Loss
Audit) (AF)
CA4910009 Yes 3.5
Gallons per
Service
Connection
per Day
(GPSCD)
53,681 205.4 3.4
Notes: Most recent AWWA Water Loss Audit was for CY 2024.
City of Santa Rosa 4-7 2025 Urban Water Management Plan June 2026
4.3.5 Current Water Use
This section includes current (2025) potable and non-potable water use. These data are based on meter reads and billing records that will be used for the City’s Public Water System Electronic Annual Report for calendar year 2025, which will be submitted to DDW in 2026.
In 2025, the City served approximately 55,851 potable water connections. The majority, 90 percent, served residential land uses while approximately 5 percent served commercial, industrial, and institutional land uses. As shown in Table 4-7, the City’s potable water customers are segregated into the following customer classes: Single Family Residential, Multi-Family Residential, Commercial, Industrial/Governmental, Institutional, Landscape, and Firelines. The City does not provide potable water for agricultural purposes.
Table 4-7 provides the number of potable accounts in each customer category currently served by the City.
TABLE 4-7: CURRENT POTABLE WATER CUSTOMERS (2025)
Sector Number of Connections Percent
Single Family Residential 46,356 83%
Multi-Family Residential 3,716 7%
Commercial 2,616 5%
Industrial 65 0.12%
Institutional/Governmental 230 0.41%
Landscape 1,564 3%
Firelines 1,304 2%
Total 55,851 100%
In 2025, the City served 32 non -potable (recycled) water connections, all of which were dedicated to landscape irrigation for multi -family residential and CII land uses. The City’s urban recycled water system does not provide water for agricultural purpose s. The number of active recycled water accounts currently served by the City in 2025 is shown in Table 4-8.
TABLE 4-8: CURRENT NON-POTABLE WATER CUSTOMERS (2025)
Sector Number of Connections Percent
Single Family Residential - -
Multi-Family Residential - -
Commercial - -
Industrial - -
Institutional/Governmental - -
Landscape 32 100%
Firelines - -
Total 32 100%
The City’s current (2025) use of potable water is summarized in Table 4-9. 2025 (and 2024) demands reflect conditions closer to average than the preceding atypical years 2020 -2023. As shown, the City’s potable
City of Santa Rosa 4-8 2025 Urban Water Management Plan June 2026
water deliveries were treated to a level of “drinking water.” The City did not supply wholesale potable water in 2025. The City’s non-potable water deliveries (recycled water) are included in Table 4-9. Recycled water was treated to meet the State’s Title 22 requirements for disinfected tertiary recycled water. As such, it is approved for all non-potable uses.
TABLE 4-9: TOTAL USES FOR POTABLE AND
NON-POTABLE WATER - 2025 ACTUAL (DWR TABLE 4-1 RETAIL)
Use Type Additional Description
(as needed)
2025 Actual Water Use
Potable or Non-
Potable
(OPTIONAL)
Volume (AF)
Single Family Potable 8,359
Multi-Family Potable 3,472
Commercial Potable 1,970
Industrial Potable 349
Institutional/Governmental Potable 324
Landscape Potable 1,452
Landscape Recycled Water Non-Potable 74
Other (optional) Fireline, Construction, Yard
Meter Potable 81
Other (optional)
Other Non-Revenue Water
(apparent losses, unbilled
unmetered consumption)
Potable 216
Distribution System Water Loss Real losses Potable 567
Subtotal Potable 16,789.5
Subtotal Non-Potable 74.1
Total 16,864
NOTES: Real losses, apparent losses, and other authorized unbilled uses were estimated from the CY 2024 water loss audit.
4.3.6 Projected Water Use
This section provides projected potable and non -potable water use by sector in five-year increments through the year 2050. The City used the same sectors and definitions as outlined in the DWR 2025 Guidebook. Projected water use is summarized from the Water Demand Analysis; a detailed description of the methodology used to project water demand is included in Appendix D.
The water demand analysis includes water demand projections based on past water use, future population and employment projections, land use planning data, climate change, and plumbing code information.
Potable demands include water use projections for lower income residential customers. Projected demands for potable water are shown in Table 4-10. Projected demands for recycled water are included in Table 4-11.
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Potable water use projections have been adjusted to account for anticipated “passive” water savings which result from new and existing local and state ordinances and codes (such as the Model Water Efficient Landscape Ordinance, National Plumbing Code, CALGreen, and State Plumbing Code).
In addition to analyzing the passive savings, an analysis of the potential “active” potable water savings was conducted. The assessment of active water savings focused on customer participation in the City’s water conservation programs. The water conservation measures selected for this analysis all had a benefit to cost ratio of greater than 1. To be conservative, the City did not reduce demand projections to adjust for anticipated active water savings. Anticipated future passive and active water savings ar e discussed in Section 4.5 and estimated in Table 4-14.
The City offsets a small percentage (less than one percent) of its potable water demand using non -potable recycled water for urban landscape irrigation. Although the City may expand its urban recycled water delivery system in the future if needed and if funding is available, the City does not have plans to do so during the planning horizon of this UWMP . Therefore, the City does not project an increase in demand for recycled water in the urban setting through 2050, other than assuming a potential increase in demand (compared to the most recent ten-year average) at existing sites due to climate change.
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TABLE 4-10: PROJECTED DEMANDS FOR POTABLE WATER (DWR TABLE 4-2 RETAIL) Use Type
Additional
Description
(as needed)
Projected Water Use
Potable or
Non-Potable
2030
(AF)
2035
(AF)
2040
(AF)
2045
(AF)
2050
(AF)
Single Family Potable 9,722 9,832 9,994 10,192 10,417 Multi-Family Potable 3,763 3,872 4,006 4,158 4,323
Commercial Potable 2,163 2,133 2,106 2,084 2,063
Industrial Potable 343 338 334 330 327
Institutional/
Governmental Potable 329 325 321 317 314
Landscape Potable 1,907 1,991 2,075 2,159 2,243
Landscape Recycled Water Non-Potable 140 140 140 140 140 Other (optional)
Fireline,
Construction, Yard
Meter
Potable 112 113 114 115 116
Distribution
System Water
Loss
Real Losses Potable 1,035 1,070 1,107 1,145 1,186
Other (optional)
Other Non-
Revenue Water
(apparent losses,
unbilled unmetered
consumption)
Potable 239.3 247.4 256.1 264.9 274.3
Subtotal Potable 19,613 19,921 20,313 20,765 21,263
Subtotal Non-Potable 140 140 140 140 140
Total 19,753 20,061 20,453 20,905 21,403
NOTES: Source: Appendix D, Table 5-5
4.3.7 Estimated Water Use for 2026-2030 Drought Risk Assessment This section provides estimated potable and non -potable water use for the next five years (2026 -2030).
These demand estimates will be used to evaluate the reliability of the City’s water supplies if a drought were to occur in the next five years, in accordance with CWC Section 10612. The estimated water use for 2026 - 2030 has been integrated into the DRA detailed in Chapter 7.
Potable water use estimates for 2026 -2030 were based on actual water use for 2025 and projected water use for 2030 from Appendix D. Projected water use for 2030 includes anticipated population growth, known development projects, potential impacts of climate change, projected water losses, and water savings from
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plumbing codes and local ordinances. The anticipated increase in water use between 2025 actual use and 2030 projected use was apportioned across the time period.
The 2026-2030 potable water use projections shown in Table 4-11 provide a realistic representation of “unconstrained” water demand. Unconstrainted demand refers to the anticipated demand for water under normal conditions, without drought conditions and without any water shortage measures in place to reduce use.
TABLE 4-11: ESTIMATED POTABLE WATER USE FOR 2026-2030, AF 2026
Estimate(a)
2027
Estimate(a)
2028
Estimate(a)
2029
Estimate(a)
2030
Projected(a)
17,661 18,149 18,637 19,126 19,614
(a) Estimated water demand for 2026-2030 was based on apportioning the difference between actual 2025 use and projected 2030 demands from Table 4-6 in the EKI report, Appendix D.
The City does not anticipate an increase in non-potable water use demand, nor a decrease in supply. There are currently no plans to expand the urban recycled water system or the number of customers served currently within the existing system, and there is no plan to curtail the amount of water allocated to these customers (140 AFY). Therefore, estimated recycled water use for 2026 -2030 has been projected at the maximum allotment of 140 AFY for the urban system consistent with planning-level estimates.
TABLE 4-12: ESTIMATED NON-POTABLE WATER USE FOR 2026-2030, AF 2026
Estimate
2027
Estimate
2028
Estimate
2029
Estimate
2030
Projected
140 140 140 140 140
4.4 Water Use For Lower Income Households
This section includes a discussion of projected water use for lower income households in the City’s service area. The City does not have the ability to track residential water use by household income and can only roughly estimate the amount of projected wa ter use for lower income households based on assumptions regarding the amount of lower income housing that currently exists in the City.
The City’s Annual Action Plan for housing provides a concise summary of the actions, activities, and the specific federal and non-federal resources that were used each year to address the priority housing needs and specific housing goals identified by the City’s Consolidated Plan for affordable housing. Recent data from the City’s 2023 –2031 Housing Element within the General Plan indicates that housing affordability challenges remain significant. For example, 44 percent of large family households are now classified as very low- or low -income, highlighting the ongoing need for targeted affordable housing strategies across a range of household types.9
9 City of Santa Rosa, 2023-2031 Housing Element Adopted and Certified (March 28, 2023)
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The City’s General Plan projects that there will be 99,940 total housing units in the City by 2050.10 Assuming the City has a similar breakdown of household income classifications in 20 50 as it does today , then approximately 44 percent of the City’s housing units ( 43,974 units) will be occupied by very -low-income and low-income households in 2050.
As discussed in Section 4.1, projected water use by customer sector is summarized in the Water Demand Analysis in Appendix D . The Water Demand Analysis projects water demand by sector for five -year increments for the years 2030-2050. The water demand of lower income households collectively is assumed to be 41 percent of the water demand for all single family and multi -family water use types through the planning horizon of this UMWP.
As indicated in Table 4-13, the City included lower income residential demands in the projected water demands out to 2045.
TABLE 4-13: INCLUSION IN WATER USE PROJECTIONS:
WATER CODE SECTION 10631 (A), 10631 (D)(4)(A), AND 10631 (D)(4)(B) (DWR TABLE 4 -3 RETAIL) Are Future Water Savings Included in Projections? Yes
If "Yes" to above, state the section or page number, in the cell to the right, where citations of the codes, ordinances, or otherwise are utilized in demand projections are found.
Optional Suppliers may complete Optional Submittal Table 4-4 R to quantify the expected savings.
Appendix D,
section 5.4
Are Lower Income Residential Demands Included In Projections? Yes Optional If the method for accounting Lower Income Residential Demands has been included, provide page number where this accounting can be found. N/A
4.5 Estimating Future Water Savings
Although future job and population growth would be expected to increase water demand, water use reduction savings are projected to decrease per capita water use for future customers compared to historical customers.
As mentioned previously, passive water savings measures include plumbing codes, standards, and ordinances. In accordance with the National Plumbing Code, the City requires new buildings to be equipped with fixtures that meet high efficiency standards (as discussed in Appendix D). Senate Bill 407 requires high efficiency standards to apply to all new and replacement residential construction as of 2017 and to new and replacement commercial construction as of 2019. Passive water savings from these and other codes are incorporated in the Water Demand Analysis as described in detail in Appendix D.
10 City of Santa Rosa General Plan 2050 (Adopted June 2025); https://www.srcity.org/392/General-Plan
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Active measures include the City’s water conservation programs. The City plans to continue to promote and implement a suite of cost effective conservation programs as described in Chapter 9 and discussed in the Water Demand Analysis (detailed in Appendix D), across the planning horizon of this UWMP.
Projected passive and active water savings in five-year increments through 2050 are summarized in Table 4-14. This table’s “passive savings” row meets the requirements of DWR Table 4 -4 Retail. Passive savings and active savings are expected to increase over the planning horizon of this UWMP. However, to be conservative, only passive water savings were applied to future demand projections.
TABLE 4-14: WATER DEMAND CUMULATIVE SAVINGS PROJECTIONS, AF 2025 2030 2035 2040 2045 2050
Passive Savings (Plumbing Codes, etc.)(a) 506 1,531 2,079 2,57 3,031 3,471 Active Savings (Water Conservation Program B)(b) 1,134 1,976 2,322 2,589 2,785 (c) (a) Reference EKI report, Table 5-5 (see Appendix D).
(b) Reference EKI report, Table 6-4 Baseline Scenario (see Appendix D). (c) Not calculated in EKI report, Table 6-4 (see Appendix D).
4.6 Climate Change Considerations
California Water Code requires water suppliers to account for the impact of climate change on water demands, supplies, and supply reliability. A discussion of the effects of climate change on water demand can be found in this chapter. The effects of climat e change on water supply can be found in Chapter 6.
Chapter 7 includes a discussion of the effects of climate change on water service reliability.
The water use factors used in the demand forecast are derived from water use during the 2017–2019 period, which reflects a rebound in demand following prior drought conditions and represents a higher level of use compared to recent (e.g., approximately 202 3-2025) trends. This timeframe was selected to capture conditions consistent with hotter, drier weather expected under future expected climate change conditions.
Incorporating these assumptions ensures that future planning accounts for increased variability, heightened temperature extremes, and the potential for greater stress on water resources driven by climate change impacts.
Climate change impacts in Sonoma County will affect the City’s water supply and demand in numerous ways. According to Climate Ready Sonoma County: Climate Hazards and Vulnerabilities , a report prepared by North Bay Climate Adaptation Initiative for the Sonoma County Regional Climate Protection Authority11, climate change is anticipated to affect Sonoma County in the following ways:
• Higher average temperatures and more extreme heat events. Sonoma County will experience a 250 percent increase in the number of very hot days (over 98.1 degrees) by 2050 12 and overall higher temperatures over a longer warm season. This could create a longer irrigation season, increase landscaping and irrigation water needs, increase the soil moisture deficit, and reduce
11 North Bay Climate Adaptation Initiative, 2014. Climate Ready Sonoma County: Climate Hazards and Vulnerabilities. Prepared for Sonoma County Regional Climate Protection Authority, December 2014. 12 Cal-Adapt (www.cal-adapt.org) using high-emissions scenario for 2050/mid-century (average of 2035–2064) and 2100/late century (average of 2070–2099) time periods compared to average conditions between 1961–1990
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groundwater recharge. Industrial processes will have increased cooling water needs, and peak water demands may be impacted. While not anticipated to impact the City’s water supply source, in some regions water quality may be impaired due to reduced baseflows. • More frequent and intense droughts. By 2050, drought years are twice as likely to occur in any given year. Severe droughts that now only occur every 20 years will occur every ten years while 100 year droughts will occur every 20 years by 2100.13 Whether the North Bay region experiences more or less rainfall overall, the land will likely be drier overall because warmer temperatures increase evapotranspiration (the loss of water from plants and soil into the air). • More variable rain and seasonality. Sonoma County will likely continue to have some years of precipitation similar to historic averages interspersed with more extreme conditions. Sonoma County is likely to experience a shorter wet season with a later onset of fall rains and an earlier onset of the dry season causing a longer irrigation season and increased peak demand. 14 More intense rainfall over shorter periods could make it harder to capture and store water supplies. • Greater risk of extreme floods. Sonoma County will see increased seasonal variability of precipitation, runoff, and stream flows, along with increased likelihood of “extreme” precipitation and drought events that were rare or unprecedented in the historic past. By 2050, it is predicted that Santa Rosa will experience a 67 percent increase in the number of extreme precipitation events (events with 2 day total of precipitation over 1.99 inches) to 2 or more events per year. 15 While not anticipated to impact the City’s water supply sources, floodwater may degrade or contaminate surface and drinking water quality in some regions, which could make it difficult to capture sufficient water (in reservoirs or groundwater) during a co mpressed rainy season to supply an extended dry season.
• More frequent and intense wildfires. The risk of fire is likely to continue to rise due to increased dryness of vegetation, compounded by productivity of plants in the spring (which creates more fuel for dry season wildfires). Water impacts could include the need for water to suppress fires, and loss of infrastructure.
• Sea level rise. While not anticipated to impact the City’s water supply sources, some regions may experience more frequent coastal flooding, increased erosion, and saltwater intrusion, which all have the potential to impact regional water supplies, supply reliability, and water quality.
Responding to climate change generally takes two forms: mitigation and adaptation. Mitigation is taking steps to reduce contributions to the causes of climate change by reducing GHG emissions. Adaptation is the process of responding to the effects of climate change by modifying systems and behaviors to function in a warmer climate. The City has implemented a suite of plans, programs, and projects pertaining to both.
The City’s mitigation and adaptation efforts have been consistently funded through its regul ar budgeting process for comprehensive asset management and capital improvement projects.
13 Swain, Langenbrunner, Neelin, Hall, Nature Climate Change. 8, 427 (2018) 14 Ibid.
15 Ibid.
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4.6.1 Climate Change Mitigation
The City has established municipal and communitywide GHG reduction targets to help mitigate climate change. Specifically, City Council adopted GHG reduction targets in 2005 that were more aggressive than the State of California’s target. In addition, the City adopted a Declaration of Climate Emergency in January 2020, establishing a goal of reaching carbon neutrality by 2030. To ensure local and state targets are met, City Council adopted a communitywide Climate Action Plan (2012) and a Municipal Climate Ac tion Plan (2013). Both plans were developed with input from the City’s water department staff, and include GHG inventories of wastewater and water operations, as well as strategies for reducing GHGs from those operations. The communitywide Greenhouse Gas Reduction Strategy was adopted on June 3, 2025 by City Council. This strategy is an update to and replacement of the City’s 2012 Community Climate Action Plan.
The Reduction Strategy establishes a roadmap to reduce the community’s GHG emissions to a minimum of 40 percent below 1990 levels by 2030, and 85 percent below 1990 levels by 2045, consistent with State - mandated emission reduction targets
The City is achieving water related climate change mitigation by reducing energy use, replacing fossil fuel - based energy sources with renewable energy sources, and implementing aggressive water efficiency and conservation programs that reduce energy associated with the movement, treatment, use, and discharge of water, and reduction in customer energy use associated with heating water.
As one of the largest energy consumers in the region, the City’s Water Department has actively pursued energy efficiencies as part of its long -standing commitment to energy management and sustainability. In addition to implementing energy efficiency measures such as upgrades to pumps, lights, buildings, and facilities, the Water Department has completed comprehensive energy and process efficiency audits for City water facilities. The Water Department has established a goal of identifying the most cost -effective project portfolio for achieving energy independence. The Water Depa rtment has completed Energy Optimization Plans for all operations (water production and delivery, sewer collection and treatment, and water recycling), which has already resulted in implementation of a diverse group of projects that enhance energy efficiency and reduce energy demand. Additionally, projects have been identified that will increase renewable energy generation and improve energy management. Such projects will be further studied to assess implementation feasibility.
In addition, the Water Department has a five-year strategic plan (2023 -2028) that includes initiatives to improve climate change adaptation. This plan has helped advance the operations of the Water Department toward its goal of energy independence, which includes further reducing dependence on fossil fue ls and outside power providers. At the Laguna Wastewater Treatment Plant (LTP), the City uses 100 percent of the digester gas produced to generate about 11 million kilowatt hours of electricity each year usi ng combined heat and power engines (47 percent of the Laguna Treatment Plant energy demand). The Water Department has also installed solar voltaic arrays on various sites to generate 65,000 kilowatt hours of electricity annually, which are used to power li ghting, pumps, and equipment in its facilities. In October 2019, the Water Department opted into the “EverGreen” program portfolio offered by Sonoma Clean Power, the local community choice aggregation entity. The EverGreen program offers individual Sonoma Clean Power customers the option to purchase 100 percent renewable energy at a premium. The City Council chose to participate in EverGreen as part of the effort to reduce dependence on fossil fuels and help the City achieve its GHG reduction goals.
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As described in more detail in Section 9, Demand Management Measures, the City has been and continues to be a leader in implementing innovative water conservation programs that reduce potable water demand and ensure that future water use is efficient. Programs are provided for all customer secto rs. As a result of these efforts, the City’s Water Use Efficiency programs have achieved a sustained water use reduction of 12,016 AF between 2010 and 2024 (see Appendix D).
4.6.2 Climate Change Adaptation
The City’s climate adaptation actions have increased its climate change resilience. The City has implemented regional groundwater management planning, local emergency groundwater infrastructure improvements, drought management planning and implementation, water use efficiency programs, use of recycled water, the expansion of overflow/wet weather capacity at its wastewater treatment plant, and storm water and creek enhancements to ensure flood capacity, species buffer zones, and natural corridors for biodive rsity.
The City is also adapting to the impacts of climate change by incorporating climate change into its water supply planning activities, including developing strategies to meet immediate, near - and long-term water supply needs. The City remains engaged in ongoing studies of localized climate change projections to assess the City’s vulnerabilities and to identify strategies to cost effectively incorporate climate change considerations into long range planning and capital improvement plans.
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5. SB X7-7 BASELINES, TARGETS AND 2020 COMPLIANCE
In November 2009, SB X7 -7, the Water Conservation Act of 2009, was signed into law as part of a comprehensive water legislation package. The Water Conservation Act addressed both urban and agricultural water conservation. The legislation set a goal of achi eving a 20 percent statewide reduction in urban per capita water use by December 31, 2020 (i.e.,“20 by 2020”). In order to meet the urban water use target requirement, each retail supplier was required to determine its baseline water use, as well as its target water use for the year 2020. Water use is measured in gallons per capita per day (GPCD). As described in the 2020 UWMP, the City met its 2020 target. The Water Code does not set an end date for reporting on progress in meeting the SB X7-7 target. DWR indicated that there was not sufficient time to conduct formal rulemaking to implement an end date to SB X7 -7 reporting requirements before 2025 UWMPs were due.
Thus, this 2025 UWMP includes this chapter which confirms that that City met its 2020 target, a s shown in Table 5-1 below.
The City achieved its 2020 target reduction both on an individual basis and as part of a Regional Alliance.
For its individual basis, the City selected SB X7-7’s method 3 to calculate its 2020 target: 95 percent of the applicable State hydrologic region target as stated in the State’s April 30, 2009, draft 20x2020 Water Conservation Plan.
In 2011, a Regional Alliance was formed between the cities of Santa Rosa, Rohnert Park, Sonoma, Cotati, and Petaluma, Town of Windsor, and North Marin, Marin Municipal, and Valley of the Moon Water Districts.
Because the parties receive water from a common water wholesale supplier (Sonoma Water), the Regional Alliance was formed pursuant to the DWR Methodologies for Calculating Baseline and Compliance Urban Per Capita Water Use. The Regional Alliance successfully demonstrated compliance (113.41 GPCD actual) with the target (129.00 GPCD) in 2020. Further information on the methodology to calculate the target and baseline, as well as the Regional Alliance, can be found in the 2020 UWMP.
As part of the Regional Alliance, the City complied with the requirements of SB X7 -7 on a regional basis. If compliance on a regional basis was unsuccessful, then the City would demonstrate compliance on an individual basis. As show in Table 5-1 below, the City is compliant with its individual target also.
TABLE 5-1: SB X7-7 2020 TARGET PROGRESS (DWR TABLE 5-1 RETAIL) Was Supplier part
of a merger or
consolidation
since 2020?
Regional Alliance
Target or
Individual Target?
Drop down list
2020 Target Actual 2020
GPCD
Did Supplier
Achieve Targeted
Reduction for
2020?
No Individual Target 126 99 Yes
In 2024, DWR and SWRCB implemented reporting for the AB 1668 / SB 606 legislation, more commonly known as Making Conservation a California Way of Life. Reporting on compliance with this new program is not currently required for the 2025 UWMP, however a discussion of the City’s programs and policies for water use efficiency is provided in Chapter 9.
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6. WATER SUPPLY CHARACTERIZATION
This chapter assesses the City’s potable and non -potable water supplies over short -term and long -term planning horizons and includes an analysis of the availability of each source out to 2050 under normal water year conditions. It also considers water supplies in a near -term drought (2026-2030) and discusses longer- term issues like climate change and regulatory revisions. The analysis examines each water source separately and then aggregates the information into a comprehensive picture of the City’s current and future water supply reliability. Chapter 7 considers the availability of water supply during single -dry water year conditions and dry five-year periods.
6.1 Purchased or Imported Water
The City purchases most of its potable water supply from Sonoma Water, pursuant to the Restructured Agreement for Water Supply (Restructured Agreement).
The Restructured Agreement defines the City’s annual entitlement as 29,100 AFY and stipulates an average of 40.0 mgd from Reach 1, 2, and 3a of the Intertie Aqueduct, 40.0 mgd from the Santa Rosa Aqueduct, 4.0 mgd from the Sonoma Aqueduct, or a maximum com bined average total of 56.6 mgd for a one month period from all aqueducts. The Restructured Agreement is dated June 23, 2006 and remains in effect until June 30, 2040.
Section 3.5 of the Restructured Agreement contains supply shortage provisions, which are further defined in the Water Shortage Allocation Methodology (Shortage Methodology), which was adopted by the Sonoma Water Board in April 2006. Both Section 3.5 of the Restructured Agreement and the Shortage Methodology take into account demand hardening associated with water conservation. Because the City has implemented an aggressive water conservation program over the past 30 years, it has one of the lowest per capita water uses among all of the water suppliers who purchase water from Sonoma Water. This is recognized by the Shortage Methodology, which encourages water conservation. Under the Shortage Methodology, if Sonoma Water’s surface water rights and Russian Rive r supply remain limited to 75,000 AFY and the Water Contractors’ total demands reach Sonoma Water’s 75,000 AFY available supply, then the City’s allocation during a shortage would still be 29,100 AFY, the City’s full entitlement under the Restructured Agreement.16
Sonoma Water is authorized to produce and deliver potable water for municipal and industrial purposes; prevent the waste or diminution of water supplies; control and conserve flood and storm waters to reduce potential damage to life and property; provide s anitary sewage services; provide recreational services in connection with flood control and water conservation activities; and levy taxes or fees for improvements necessary to conduct these activities. Sonoma Water operates under the direction of a Board o f Directors that consists of the Sonoma County Board of Supervisors. The water system facilities of Sonoma Water are briefly described in Chapter 3. Potential constraints to this supply source are discussed in Chapter 7.
Sonoma Water delivers water on a wholesale basis to customers through its water transmission system. The primary water customers, collectively known as the Water Contractors, include the cities of Santa Rosa, Cotati, Petaluma, Rohnert Park, and Sonoma; the Town of Windsor; and the water districts of North Marin
16 Letter from County of Sonoma’s Board of Supervisors, April 2006.
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and Valley of the Moon. The responsibility for supplying water to the Water Contractors is entrusted to Sonoma Water under the terms of the Restructured Agreement. Sonoma Water also provides water on a wholesale basis to and/or has authorized the exercise of its water rights by additional water purveyors, including but not limited to Marin Municipal Water District, Forestville Water District, and California American Water, Lawndale Mutual Water, Penngrove, and Kenwood Water companies.
Sonoma Water’s primary source of supply is the Russian River. Sonoma Water manages water supply releases at Coyote Valley Dam, which impounds water in Lake Mendocino on the East Fork of the Russian River, and Warm Springs Dam, which impounds water in Lake Sonoma on Dry Creek (a tributary to the Russian River), to provide water supply and to maintain required minimum flows in the Russian River and Dry Creek. Flood control releases from Coyote Valley Dam and Warm Springs Dam are controlled by the United States Army Corps of Engineers. Flows in the Russian River have been historically augmented by Pacific Gas & Electric Company’s (PG&E) Potter Valley Project, which diverts a portion of the Eel River flows to the East Fork of the Russian River. However, as discussed in Section 7.1.1.4, those augmented flows are proposed to be substantially reduced over the planning period of this UWMP update.
Sonoma Water ’s diversion facilities extract Russian River underflow, which is reported under Sonoma Water’s surface water rights. Sonoma Water operates six radial collector wells adjacent to the Russian River (three at the Wohler production facility and three at the Mira bel production facility) and delivers it to its customers through an aqueduct transmission system consisting of storage tanks, pipelines and pump stations. Sonoma Water enhances production capacity during peak demand months by raising an inflatable dam on the Russian River near Mirabel that allows for operation of five infiltration ponds at Mirabel that increase the area of infiltration along the Russian River. Water pools behind the inflatable dam and is diverted into the infiltration ponds to recharge the aquifer in the vicinity of the Mirabel collectors. Backwater conditions along the river also result in increased infiltration in the Wohler area, thereby enhancing the production capacity of those collectors.
Sonoma Water holds appropriative water rights to Russian River and Dry Creek water by virtue of an assignment to Sonoma Water of Sonoma County’s portion of the 1949 application to the State of California for the Coyote Valley Dam Project appropriative water rights, and Sonoma Water’s 1960 application for the Warm Springs Dam Project appropriative water rights. The combined limit on Sonoma Water’s annual Russian River diversions under its water rights permits (Permit Nos. 12947A, 12949, 12950, and 16596) is currently 75,000 AFY, with a maximum diversion rate of 180 cubic feet per second.
Sonoma Water also has three groundwater wells that provide water supply. They are located near the Laguna de Santa Rosa and feed directly into Sonoma Water’s Russian River Cotati Intertie Pipeline. Sonoma Water estimates the current and future production capacity of these wells at 1,900 AFY.
6.1.1 Past and Current Contract Water
Since 1959, the City’s primary source of potable water supply has been Sonoma Water. From the 1980s to 2007, it was the City’s only source. In 2007, the City added groundwater wells to its potable water system to supplement supplies obtained from Sonoma Water and provide supply during high demand periods. The City’s peak water demand year on record for contract water was 2004 (23,993 acre -feet). Over the past 10 years, the peak year for contract water was 2020 (18,024 acre feet).
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Approximately 94 percent of the City’s annual water supply has come from Sonoma Water. Table 6-1 shows the volume of water purchased from Sonoma Water over the past five years (2021-2025).
TABLE 6-1: PAST AND CURRENT (2025) PURCHASED WATER, AF
Water Supply: Sonoma Water (surface water)
2021 2022 2023 2024 2025
15,841 15,179 15,058 16,194 15,846
6.1.2 Future Contract Water
The City’s annual entitlement for contract water from Sonoma Water is 29,100 AFY. As shown in Table 6-2, it is anticipated that Sonoma Water will meet the obligation to deliver 29,100 AFY out to 2050 under normal water year conditions. Chapter 7 discusses dry year conditions and anticipated water supply.
TABLE 6-2: PROJECTED PURCHASED WATER SUPPLY AVAILABILITY, AF Supply Source: Sonoma Water (surface water)
2030 2035 2040 2045 2050
29,100 29,100 29,100 29,100 29,100
6.2 Groundwater
The City is located within the Santa Rosa Plain Subbasin (Subbasin) of the Santa Rosa Valley Groundwater Basin. Prior to 1960, the City relied primarily on groundwater from this Subbasin for its water supply, plus a small amount of surface water from Lake Ralphine. In June 1959, Sonoma Water began supplying surface water to the City and other Water Contractors. By the 1980s and until 2007, the City relied solely on purchased water deliveries from Sonoma Water to meet its water demands.
In July 2005, the City received permission from DPH (now DDW) to change the status of two of its standby wells permitted for emergency supply (Farmers Lane Wells No. W4 -1 and W4-2) to full-time active status.
These wells are now permitted for regular production of up to 2,300 AFY of potable supply. The City began using them for water supply in 2007. Including these two production wells, the City maintains a total of seven municipal groundwat er wells within the Santa Rosa Plain Subbasin, in various states of production use, emergency use, irrigation only, in construction, and offline for rehabilitation.
6.2.1 Groundwater Basin Description
The City’s Urban Growth Boundary overlies portions of two groundwater basins: the Santa Rosa Valley Groundwater Basin (specifically two of its Subbasins: the Santa Rosa Plain Subbasin and the Rincon Valley Subbasin) and the Kenwood Valley Groundwater Basin. Figure 6-1 shows the urban growth boundaries for multiple municipalities in the Santa Rosa Plan Subbasin and underlying groundwater basins. Although the City’s Urban Growth Boundary overlies portions of the Rincon Valley Subbasin and the Kenwood Valley
City of Santa Rosa 6-4 2025 Urban Water Management Plan June 2026
Groundwater Basin, the City’s groundwater supply is derived exclusively from the Santa Rosa Plain Subbasin.
The City does not currently derive any groundwater supply from the Rincon Valley Subbasin or the Kenwood Valley Groundwater Basin. Table 6-3 provides an overview of the characteristics of the groundwater basins and Subbasins.
TABLE 6-3: CHARACTERISTICS OF GROUNDWATER BASINS/SUBBASINS UNDERLYING
CITY OF SANTA ROSA URBAN GROWTH BOUNDARY
Groundwater Basin Name Subbasin Name DWR Basin
Number Surface Area
Santa Rosa Valley
Groundwater Basin(a)
Santa Rosa Plain
Subbasin 1-055.01 80,000 acres
(125 square miles)
Rincon Valley
Subbasin 1-055.03 5,600 acres
(9 square miles)
Kenwood Valley
Groundwater Basin None 2-019 5,135 acres
(8 square miles)
Source: Department of Water Resources Bulletin 118, Groundwater Basin Descriptions, updated 2018. (a) Other Subbasins include the Healdsburg Area and Alexander Valley Subbasins, located north of the City of Santa Rosa.
However, because the City of Santa Rosa does not overlie any portion of these subbasins, they are not included here.
Brief descriptions of the Rincon Valley Subbasin and the Kenwood Valley Groundwater Basin are provided below to be inclusive of all Basins/Subbasins that the City’s Urban Growth Boundary overlies. However, the remaining groundwater discussion will focus so lely on the Santa Rosa Plain Subbasin. The groundwater basin descriptions were derived from the DWR Bulletin 118 (last updated in 2018) 17 with additional information obtained from:
• Evaluation of Groundwater Resources in Sonoma County Volume 2: Santa Rosa Plain (DWR, 1982) • Geologic Map of the Santa Rosa Quadrangle (CGS, 1999) • Santa Rosa Plain Groundwater Sustainability Agency, Groundwater Sustainability Plan (2022)
6.2.1.1 Santa Rosa Valley Groundwater Basin
The Santa Rosa Valley Groundwater Basin is one of the largest groundwater basins in DWR’s North Coast Hydrologic Region and occupies a northwest trending structural depression in the southern part of the Coast Ranges of Northern California in Sonoma County . This depression divides the Mendocino Range on the west from the Mayacamas and Sonoma Mountains on the east. The Santa Rosa Valley Groundwater Basin has three alluvial subbasins: the Healdsburg Subbasin, the Santa Rosa Plain Subbasin, and the Rincon Valley Subbasin. Neither the Santa Rosa Valley Groundwater Basin, nor any of its subbasins, are adjudicated groundwater basins. None of the subbasins in the Santa Rosa Valley Groundwater Basin have been identified as overdrafted basins according to DWR Bulletin 118. Under the Sustainable Groundwater Management Act
17 California Department of Water Resources, 2018.
City of Santa Rosa 6-5 2025 Urban Water Management Plan June 2026
(SGMA) Basin Prioritization classification, Healdsburg Subbasin and Rincon Valley Basin were designated as “low” priority and Santa Rosa Plain Subbasin was designated as “medium” priority.
As shown on Figure 6-1, the City overlies a portion of the Santa Rosa Plain Subbasin, the Rincon Valley Subbasin and the Kenwood Valley Basin. In September 2018, the City of Sebastopol requested a change in the Santa Rosa Plain Subbasin boundary to include the City of Sebastopo l. DWR approved the request in February 2019.
The Santa Rosa Plain Subbasin (DWR Groundwater Basin Number 1-055.01) covers an area of 80,000 acres, or approximately 125 square miles. It is the largest subbasin of the Santa Rosa Valley Groundwater Basin and is characterized by low relief with an average ground surface elevation of approximately 145 feet above mean sea level.
The Santa Rosa Plain Subbasin is approximately 22 miles long and 0.2 miles wide at the northern end; approximately 9 miles wide through the Santa Rosa area; and about 6 miles wide at the south end of the plain near the City of Cotati. The Santa Rosa Plain Subbasin is bounded on the northwest by the Russian River plain approximately one mile south of the City of Healdsburg and the Healdsburg Subbasin.
Mountains of the Mendocino Range flank the remaining western boundary. The southern end of the subbasin is m arked by a series of low hills, which form a drainage divide that separates the Santa Rosa Valley from the Petaluma Valley basin south of Cotati. The eastern subbasin boundary is formed by the Sonoma Mountains south of Santa Rosa and the Mayacamas Mountains north of Santa Rosa.
The Santa Rosa Plain Subbasin is drained principally by the Santa Rosa and Mark West Creeks that flow westward into the Laguna de Santa Rosa. The Laguna de Santa Rosa flows northward and discharges into the Russian River. Annual precipitation in the Santa Rosa Plain ranges from approximately 30 inches measured at Climate Station Santa Rosa (USC00047965) in downtown Santa Rosa, and up to 50 inches per year in the Mayacamas and Sonoma Mountains. Approximately 93 percent of the annual precipitation falls between October and May. During the wet season, a large percentage of the rainfall falls during three or four major winter storms.
The Rincon Valley Groundwater Subbasin (DWR Groundwater Basin 1 -055.03) occupies a small north to northwesterly trending structural trough located adjacent to the east side of the Santa Rosa Groundwater Subbasin. Rincon Valley is approximately seven miles long and has a width that varies from 0.5 to 2.5 miles.
Rincon Valley encompasses an area of 5,600 acres (approximately nine square miles) and is bounded by the Sonoma and Mayacamas Mountains, except to the southeast, where it is bounded by the Kenwood Valley Groundwater Basin, and on the southwest, where it is bounded by the Santa Rosa Plain Groundwater Subbasin. Rincon Valley is drained by Brush Creek, a tributary of Santa Rosa Creek.
This region is characterized by geologic complexity. Faults represent structural boundaries that limit lateral extent of geologic formations and groundwater movement. The major geologic formations comprising the Santa Rosa Plain and Rincon Valley Groundwater Subbasins are, from youngest to oldest, Younger Alluvium, Older Alluvium (alluvial fan deposits), the undifferentiated Glen Ellen, Huichica Formations and related continental deposits, the Sonoma Volcanics, the Wilson Grove (formerly Merced) Formation a nd the Petaluma Formation. The Tolay Volcanics may also be present in the subsurface. The groundwater subbasins are floored by low permeability rocks of the Franciscan Formation. A description of each of these units and their hydrogeologic properties is provided in Table 6-4.
City of Santa Rosa 6-6 2025 Urban Water Management Plan June 2026
In the GSP’s Hydrogeologic Conceptual Model, there are two principal aquifer systems identified: shallow aquifer system and deep aquifer system. The two systems are separated by clay layers that act as barriers to flow and they are distinguished in their thickness and degree of continuity. In the shallow aquifer system, primary extractions are from domestic water supply wells and shallow agricultural or public supply wells.
The shallow aquifer system is more closely connected to surface water in some areas, seasonally supporting water for riparian communities along many shallow surface waterways. The deep aquifer system is generally confined or semi-confined and does not have substantial connection to surface water. Extractions from this aquifer system are f rom a variety of users including domestic well owners in unincorporated areas of the Subbasin, agricultural wells used for crop irrigation, industrial and commercial wells, and public water supply wells for municipal and smaller public supply systems.
City of Santa Rosa 6-7 2025 Urban Water Management Plan June 2026
FIGURE 6-1: CITY OF SANTA ROSA BASINS
City of Santa Rosa 6-8 2025 Urban Water Management Plan June 2026
TABLE 6-4: SUMMARY OF GEOLOGICAL UNITS IN THE SANTA ROSA AND
RINCON VALLEY GROUNDWATER SUBBASINS(A, B)
Geological Unit Map
Symbol(c) Lithology Specific
Yield Comments
Younger Alluvium Q
Interbedded layers
of sand, silt, clay,
and gravel
Variable
(3-15%)
May contain objectionable levels of
iron and manganese above
secondary drinking water standards.
Older Alluvium
(Alluvial Fan
Deposits)
Qo
Fine sand, silt, and
silty clay, coarse
sand and gravel,
with gravel more
abundant near fan
heads
Moderate
to high
(8-17%)
Lenses of very fine sand. Minor
amounts of methane gas. May
contain objectionable levels of iron
and manganese above secondary
drinking water standards.
Glen Ellen and
Huichica
Formations and
related,
undifferentiated
continental
deposits
QT
Cemented gravel,
sand, silt and clay,
local interbedded
tuff
Low
(3-7%)
Generally low yields unless a
substantial thickness of coarse
gravel and sand is penetrated. May
contain objectionable levels of iron
and manganese above secondary
drinking water standards.
Sonoma
Volcanics Psv
Volcanic flows,
agglomerates, and
tuffs
Highly
Variable
(0-15%)
Variable yields. Some water has
high boron content. Some water is
thermal. Zones of hydrogen sulfide
(H2S). May occasionally exceed
secondary drinking water standards
for iron and manganese.
Wilson Grove
(formerly
Merced)
Formation
Pwg
Mostly marine
coarse-to-fine
grained sandstone
with minor
amounts of clay.
Sandstone is
typically yellow,
gray, or buff-white
in surface
exposures and
distinctively blue in
subsurface cuttings
High
(10-20%)
Lenses of very fine sand. Drillers’
well logs generally describe this
unit as blue sand, blue sandstone,
cemented sand, or blue rock with
some intervals of blue clay. Zones
of high concentration of methane
gas. May occasionally exceed
secondary drinking water standards
for iron and manganese. Water not
as hard as other formations.
City of Santa Rosa 6-9 2025 Urban Water Management Plan June 2026
Geological Unit Map
Symbol(c) Lithology Specific
Yield Comments
Petaluma
Formation Pp
Mostly non-marine
clay and shale with
minor amounts of
sandstone
Low
(3-7%)
Generally low yields. Yields may be
higher for wells penetrating lenses
of coarse material. Wilson Grove
and Petaluma formations deposited
at about the same time – driller’s
logs indicate alternating layers of
blue sandstone and blue clay.
Zones of hydrogen sulfide (H2S).
May contain objectionable levels of
iron and manganese.
Tolay Volcanics Ttv
Volcanic flows,
tuffs, breccias and
agglomerates
Unknown Variable yields. Fair to good water
producer regionally.
Franciscan
Complex KJf
Mélange, including
chert, sandstone,
shale, greenstone,
and serpentinite
Very low
(<3%)
Low yields. Poor quality water in
thermal and serpentinite areas.
Good quality locally.
(a) Based on Table I in DWR Bulletin 118 -4, Evaluation of Ground Water Resources Sonoma County, Volume 2: Santa Rosa Plain (September 1982).
(b) Based on Table 4 in Sweetkind, D.S., J.A. Hevesi, T. Nishikawa, P. Martin, and C.D. Farrar. 2013. “Hydrology of the Santa Ros a Plain Watershed, Sonoma County, California.” Chapter B. In Nishikawa, Tracy, ed., Hydrogeologic and geochemical characterization of the Santa Rosa Plain watershed, Sonoma County, California. U.S. Geological Survey Scientific Investigations Report 2013-5118, pp. 27-112. https://pubs.usgs.gov/sir/2013/5118/ (c) Geologic Map of the Santa Rosa Quadrangle; 1:250,000, California Geological Survey, 1999.
6.2.1.2 Kenwood Valley Groundwater Basin
The Kenwood Valley Groundwater Basin (DWR Basin Number 2-019) is located east of the Santa Rosa Valley and the City of Santa Rosa in Sonoma County and covers an area of approximately 5,135 acres, or approximately eight square miles. Kenwood Valley occupies a portion of a small north to northwest trending structural trough located to the southeast of the Rincon Valley Subbasin.
The Kenwood Valley Groundwater Basin is approximately seven miles long and varies in width from less than one mile to about two miles at its widest point. The majority of the Kenwood Valley Groundwater Basin is bounded by the Napa-Sonoma Volcanic Highlands, except for the northwest side, where the Kenwood Valley is separated from the Rincon Valley Subbasin by Santa Rosa Creek.
The Kenwood Valley Groundwater Basin is drained by the Santa Rosa and Sonoma Creeks. The principal water bearing units in this groundwater basin are Alluvium and the Glen Ellen Formation (see descriptions above). Annual precipitation in Kenwood Valley ranges from about 36 to 44 inches. This basin is tapped for domestic use by the Kenwood Village Water Company for residents in the Kenwood area. It is not an adjudicated groundwater basin. It has not been identified as an over drafted basin and is not anticipated to become an over drafted basin according to DWR Bulletin 118.
City of Santa Rosa 6-10 2025 Urban Water Management Plan June 2026
6.2.2 Groundwater Management
Several municipal water purveyors, including the City and private parties, use groundwater within the Santa Rosa Plain Subbasin. These municipal water purveyors and the County are working collectively to better understand and manage the regional groundwater resources.
In 2009, the California legislature passed Senate Bill X7-6, requiring groundwater level monitoring for every groundwater basin and subbasin listed in DWR Bulletin 118. In response to the legislation, the California Statewide Groundwater Elevation Monitoring (CASGEM) Program was established. In December 2010, Sonoma Water and Sonoma County Permit and Resources Management Department (Permit Sonoma) notified the Department of Water Resources that they would be the Monitoring Entities for 13 of the 14 groundwater basins and subbasins located in Sonoma County. The City has been working collaboratively with Sonoma Water and Permit Sonoma to provide groundwater level data as required by CASGEM for monitoring wells within Santa Rosa’s service area.
As part of a joint effort, the U.S. Geological Survey (USGS) partnered with Sonoma Water, the cities of Santa Rosa, Rohnert Park, Cotati, and Sebastopol, the Town of Windsor, California American Water, and others, to undertake a cooperative study. The obje ctives of this study were to: 1) Develop an updated assessment of the geohydrology, geochemistry and geology of the Santa Rosa Plain Subbasin; 2) Develop a groundwater flow model of the Santa Rosa Plain Subbasin; and 3) Evaluate the hydrogeologic impacts o f alternative groundwater strategies for the Santa Rosa Plain Subbasin. Final results of the study were released in 2013, followed by the release of the surface water/groundwater model report in 2014.
The USGS study identified the following key findings from 18:
• Groundwater Quality – Many wells in the Santa Rosa Plain Subbasin produce high quality water, but naturally occurring elements such as iron, manganese, boron, and arsenic are widely variable in groundwater and can pose problems in some areas. Areas in the southern Santa Rosa Plain Subbasin also exhibit increasing chloride concentrations. Groundwater underlying the City’s service area generally meets primary and secondary drinking water standards for municipal use. • Groundwater Level Trends – Groundwater trend data from the existing monitoring wells located throughout the Subbasin indicate that water levels within the main portion of the Subbasin have generally remained constant or have slightly increased over time, indicating that the Subbasin is in balance and is not suffering from overdraft.
• Groundwater Storage and Budget – The gross groundwater storage capacity for the basin is estimated to be about 948,000 AF. The water budget for the Santa Rosa Plain Subbasin (amount and sources of water entering versus the amounts and sources of water exit ing the subbasin) has been estimated using a computer model of groundwater flow. The results indicate that over the 35-year period simulated by the model (1975 through 2010), more water exited the basin through a combination of groundwater pumping and natu ral outflows than entered the basin, resulting in an average annual loss of groundwater storage of approximately 3,300 AFY. The estimated storage loss is a relatively small percentage of the total storage in the basin.
18 U.S. Geological Survey, Nishikawa, Tracy, ed., 2013.
City of Santa Rosa 6-11 2025 Urban Water Management Plan June 2026
In 2014, the State Legislature passed the Sustainable Groundwater Management Act (SGMA), requiring the formation of a Groundwater Sustainability Agency (GSA) and preparation of a Groundwater Sustainability Plan (GSP) to sustainably manage groundwater supplies. As mentioned, DWR identified the Santa Rosa Plain Subbasin as a medium priority groundwater basin that is not critically overdrafted as part of the 2019 Basin Prioritization effort.
In response to SGMA, local agencies worked together to form the Santa Rosa Plain GSA as a public agency in June 2017.
The Santa Rosa Plain GSA was formed through a Joint Exercise of Powers Agreement (JPA) entered into by the following entities in 2017, and later amended in 2019:
• City of Cotati
• City of Rohnert Park
• City of Santa Rosa
• City of Sebastopol
• Town of Windsor
• Gold Ridge Resource Conservation District
• Sonoma County
• Sonoma County Water Agency
• Sonoma Resource Conservation District
• And an organized group of mutual water and Public Utilities commission -regulated companies (Independent Water Systems)
The Santa Rosa Plain GSA has a Board of Directors, a plan manager, and an advisory committee. The appointed Board of Directors includes representatives from each entity that is part of the GSA. The appointed Advisory Committee is comprised of community members with diverse perspectives on beneficial groundwater use, including representatives from agriculture, the environmental community, the business community, rural residential well users, and public water suppliers. The Advisory Committee’s purpose is to provide input and recommendations to the Santa Rosa Plain GSA Board of Directors on GSP development, implementation, and policies.
The Santa Rosa Plain Subbasin is ranked as a medium priority basin by DWR. Therefore, pursuant to SGMA requirements, the Santa Rosa Plain GSA submitted a GSP to DWR in January 2022, and the GSP was approved a year later in January 2023. The GSP establishes a suite of measures and management strategies to ensure the basin will achieve sustainability, as defined by state law, by 2042. The GSP defines sustainable management criteria thresholds and measurable objectives and includes an implementation plan to evaluate, monitor, and manage the Santa Rosa Plain Subbasin sustainably so as to avoid the six defined undesirable results listed in SGMA: chronic lowering of groundwater levels, reduction of groundwater storage, surface water depletion, water quality degradation, land subsidence, and seawater intrusion.
The City is a member of the Santa Rosa Plain GSA and will continue to participate as a member of the GSA during implementation of the GSP. Sustainability measures included in the GSP include: 19
19 https://santarosaplaingroundwater.org/gsp/
City of Santa Rosa 6-12 2025 Urban Water Management Plan June 2026
• Increased water conservation and efficiency
• Data and monitoring improvements
• Increased groundwater recharge
• Increased water recycling and reuse
• Integrated groundwater management with other water resources (such as stormwater) In September 2013 the City adopted a Groundwater Master Plan (GMP). The overall objective of the City’s GMP is to “provide a strategic road map for the City’s Water staff, BPU, and City Council of how available groundwater resources could be most effective ly used, in a sustainable manner, to meet the needs of the City’s existing and future customers.”20
The GMP provides background information on the City’s historical use of groundwater, descriptions of ongoing studies, recommendations for an emergency groundwater supply plan, development of a key well monitoring network, and a conceptual evaluation of the potential use of aquifer storage and recovery wells.
Included in the preparation of the GMP is the development of recommended groundwater policies designed to guide the future role of groundwater and promote balanced use and sustainability for the groundwater resources available to the City. Based on these recommended policies, specific groundwater projects and programs were identified and prioritized to implement the direction of the BPU. The GMP advanced the characterization and monitoring of groundwater conditions, and served as an initial study and planning of potential projects within the Subbasin.
In early 2022, the City started the process of developing a new plan to guide the City in its water supply options, including groundwater development. This new plan, entitled the Water Supply Alternatives Plan (WSAP), outlined various supply options including the development of new production wells, conversion of emergency wells to production wells and exploration of aquifer storage and recovery wells. 21 The WSAP supersedes the GMP, which identified new emergency groundwater supplies as the priority for the City.
With the WSAP, the City anticipates developing new municipal supply groundwater wells, with a total goal of up to approximately 4,100 AFY by 2040, of which includes already existing groundwater supplies of 2,300 AFY.
GSP implementation is designed to build upon all existing efforts, at the City and GSA level, to manage groundwater within the Santa Rosa Plain Subbasin.
6.2.3 Overdraft Conditions
As noted above, the Santa Rosa Plain Valley Groundwater Basin and its subbasins are not adjudicated.
Furthermore, the basin and its subbasins have not been identified as overdrafted and are not anticipated to become overdrafted basins according to DWR Bulletin 118.
Groundwater trend data analyzed in the GSP from the existing monitoring wells located throughout the Subbasin indicate that water levels within the main portion of the Subbasin have generally remained constant or have slightly increased over time, indicating that the Subbasin is in balance and is not suffering from overdraft. The GSP lays out a management process for ensuring a sustainable groundwater supply in
20 West Yost Associates, City of Santa Rosa Groundwater Management Plan, Final Report, September 2013. 21 https://www.srcity.org/OurWaterFuture
City of Santa Rosa 6-13 2025 Urban Water Management Plan June 2026
the future by improving the understanding of groundwater as a resource, measuring progress through metrics that will be monitored, actively implementing projects, adopting policies and management actions in response to groundwater conditions if they declin e unacceptably, and developing the funding needed for long-term implementation.
6.2.4 Historical Groundwater Pumping
The City has a total of seven municipal groundwater wells within the Santa Rosa Plain Subbasin. These wells are listed in Table 6-5 along with their current status TABLE 6-5: CITY OF SANTA ROSA MUNICIPAL GROUNDWATER WELLS Well Name/Number Well Status
A Place to Play (W7) In construction. Will be used for emergency potable purposes.
Leete (W1) Offline for rehabilitation; used for emergency potable purposes.
Carley (W2-1) Offline for rehabilitation; used for emergency potable purposes and some landscape irrigation. May be re-permitted as a production well.
Peter Springs (W2-2) Offline for rehabilitation; used for emergency potable purposes, landscape irrigation and filling of a nearby lake.
Farmers Lane (W4-1) Active Status(a)
Farmers Lane (W4-2) Active Status(a)
Farmers Lane (W4-3) Not connected to City’s potable water distribution system; used strictly for minor landscape irrigation purposes.
(a) Change in status approved by California Department of Public Health (now Division of Drinking Water (DDW)) on July 20, 2005.
Prior to obtaining surface water supplies from Sonoma Water in 1959, the Farmers Lane production wells contributed a significant portion of the groundwater supplies required to meet the City’s demands. Of the City’s roughly 2,870 AFY of historical groundwa ter pumpage prior to 1959, it is estimated that the Farmers Lane Wells supplied about 1,720 AFY 22. Once the City switched to Sonoma Water supply, the City’s wells were put in standby mode. In 2007, the City began pumping water once again from Farmers Lane Wells No.
W4-1 and W4-2 into the City’s potable water system to supplement supplies obtained from Sonoma Water and to provide supply during high demand periods. Table 6-6 (DWR Table 6 -1) shows the volume of groundwater pumped for potable supply for 2021 through 2025.
22 Technical Memorandum, Evaluation of Potential Impacts Associated with Increased Groundwater Production from Farmers Lane Wells W4 1 and W4 2, prepared by West Yost & Associates, July 22, 2004.
City of Santa Rosa 6-14 2025 Urban Water Management Plan June 2026
TABLE 6-6: GROUNDWATER VOLUME PUMPED (DWR 6-1 RETAIL)
Check the box if the Supplier does not pump groundwater.
Proceed to the next table.
Check the box if all or part of the groundwater described below is desalinated. (OPTIONAL)
Groundwater
Type
Potable or
Non-Potable
Location or
Basin Name
2021
(AF)
2022
(AF)
2023
(AF)
2024
(AF)
2025
(AF)
Alluvial Basin Potable Santa Rosa
Plain 1,324 1,057 1,234 1,001 1,326
Total 1,324 1,057 1,234 1,001 1,326
6.2.5 Future Groundwater Pumping
As described in the GMP, the City intended to construct emergency groundwater wells throughout the City’s water service area, including the Rincon Valley Subbasin and Kenwood Valley Groundwater Basin, to increase emergency groundwater supply resources23. However, with the adoption of the WSAP, the City has a renewed focus on new production capacity instead. This could include developing new groundwater wells, converting emergency wells to production, and exploration of aquifer storage and recovery (ASR) we lls.
Next steps towards this process include the development of California Environmental Quality Act analysis for new wells, a well siting study, and research into the feasibility of ASR. With the WSAP, the City anticipates developing new production ground water wells, up to approximately 4,100 AFY including existing well capacity.
The projected groundwater availability in normal years in five -year increments through 2050 is shown in Table 6-7.
TABLE 6-7: PROJECTED GROUNDWATER SUPPLY AVAILABILITY, AF Groundwater Type Location or
Basin Name 2030 2035(a) 2040(a) 2045(a) 2050(a)
Alluvial Basin Santa Rosa
Plain Subbasin 2,300 3,100 4,100 4,100 4,100
Total 2,300 3,100 4,100 4,100 4,100
(a) Development of new wells is estimated and could be delayed or changed based on CEQA analysis, well siting study, and other factors.
23 West Yost Associates, September 2013.
City of Santa Rosa 6-15 2025 Urban Water Management Plan June 2026
6.3 Wastewater and Recycled Water – Non-Potable Supply
The City’s Water Department is responsible for the operation and management of the Santa Rosa Regional Water Reuse System (Regional System). The Regional System operates the Laguna Treatment Plant (LTP), oversees the Industrial Pretreatment Program, and op erates and maintains the recycled water system for more than 225,000 residents and 6,500 businesses for the Cities of Cotati, Rohnert Park, Santa Rosa, and Sebastopol, and the South Park Sanitation District and portions of unincorporated Sonoma County. As managing partner of the Regional System, the City is responsible for operating the system economically and safely and for planning for future regulatory changes and growth.
Local water, wastewater, and planning agencies were consulted and participated in the development of the Regional System’s Incremental Recycled Water Program (IRWP), which is the planning document developed to continually optimize the use of recycled water and offset demands on the potable water system. The agencies that participated in the development of the IRWP are listed in Table 6-8.
TABLE 6-8: AGENCIES PARTICIPATING IN INCREMENTAL RECYCLED WATER PROGRAM Agency Type Agency Name Participated
Water Agencies Cities of Cotati, Rohnert Park, Santa Rosa, Sebastopol, and Windsor; Sonoma County Water Agency X
Wastewater Agencies Cities of Cotati, Rohnert Park, Santa Rosa, and Sebastopol; South Park Sanitation District X
Groundwater
Agencies None
Planning Agencies County of Sonoma; Cities of Cotati, Rohnert Park, Santa Rosa, and Sebastopol X
6.3.1 Wastewater System Description
The City operates the LTP for the Regional System. Figure 6-2 depicts the location of the wastewater treatment facilities and reclamation facilities for all the partners in the Regional System service area. LTP is a tertiary level treatment facility and is permitted for 21.34 mgd average daily dry weather flow. LTP t akes wastewater from homes, businesses, and industry located within the Cities of Santa Rosa, Rohnert Park, Sebastopol, and Cotati, and the South Park Sanitation District. Over 500 miles of underground pipes bring wastewater to the treatment plant where water goes through three stages of treatment prior to disinfection, storage, and reuse. The water is treated to the highest non -potable water recycling regulations (Title 22 Tertiary). The volume of wastewater collected within the City’s service area in 2025 is shown in Table 6-9.
City of Santa Rosa 6-16 2025 Urban Water Management Plan June 2026
FIGURE 6-2: CITY OF SANTA ROSA REGIONAL SYSTEM
City of Santa Rosa 6-17 2025 Urban Water Management Plan June 2026
TABLE 6-9: WASTEWATER COLLECTED WITHIN SERVICE AREA IN 2020 (DWR TABLE 6-2 RETAIL)
Check the box if there is no wastewater collection system.
Proceed to the next table.
Percentage of 2025 service area served by wastewater collection system (OPTIONAL)
Percentage of 2025 service area population served by wastewater collection system (OPTIONAL)
Wastewater Collection Recipient of Collected Wastewater Name of
Wastewater
Collection
Agency
Wastewater
Volume
Metered or
Estimated?
Volume of
Wastewater Collected
from UWMP Service
Area 2025 (AF)
Name of Wastewater
Treatment Plant
(WWTP) and Place ID
Number
Is WWTP
Located Within
UWMP Area?
Santa Rosa
Regional
System
Estimated 21,973
Santa Rosa Laguna
Subregional Water
Reclamation Facility,
Place ID 255703
No
Total Wastewater Received
from UWMP Service Area in
2025:
21,973
6.3.2 Wastewater Disposal and Recycled Water Uses
The Regional System’s primary point of discharge is via the Delta Pond at the confluence of Santa Rosa Creek and the Laguna de Santa Rosa. The North Coast Regional Water Quality Control Board (NCRWQCB) regulates wastewater discharges from the Regional System. Under the NCRWQCB guidelines, tertiary treated water can be discharged only between October 1 and May 14. Discharge cannot exceed five percent of the Russian River flow.
The Regional System is one of the largest recyclers of water in Northern California. The recycled water that leaves the treatment plant is high quality, tertiary treated water that is safe for many reuse purposes, including irrigation of landscapes, agricultural crops, vineyards, playgrounds, golf courses, and public parks.
Depending upon the amount of rainfall in any given year, approximately 98 percent of the Regional System’s wastewater is recycled for urban landscapes and rural agricultural irrigation ( approximately 6,000 acres of farmlands and vineyards), and the Geysers Recharge Project.
The Regional System provides recycled water to the City of Rohnert Park for its urban reuse program for irrigation at many Rohnert Park schools, parks, and businesses, as well as Sonoma State University. These uses are discussed in the City of Rohnert Park’s UWMP.
City of Santa Rosa 6-18 2025 Urban Water Management Plan June 2026
In Santa Rosa, recycled water is used within the City’s urban growth boundary for landscape irrigation at City facilities (including the municipal services center, bus transfer station, Finley Park, and A Place to Play sports complex), as well as multi-family residential complexes, institutions, and business parks.
Since the water recycling treatment plant opened in 1968, treated effluent production has increased from 2 mgd to an average of 18 mgd over the 2019 -2024 period . The recycled water distribution system is supported by storage reservoirs that can hold over 1.65 billion gallons of water, which allows the system to meet peak, hot summer day irrigation requirements.
The current (2025) volumes of wastewater treated, discharged, and used as recycled water from the Regional System are shown in Table 6-10. The Regional System has not discharged treated wastewater for several years. It has been able to recycle all of the treated wastewater.
City of Santa Rosa 6-19 2025 Urban Water Management Plan June 2026
TABLE 6-10: WASTEWATER TREATMENT AND DISCHARGE WITHIN SERVICE AREA IN 2020 (DWR TABLE 6 -3 RETAIL) Check the box if no wastewater is treated or disposed of within the UWMP service area.
Wastewater
Treatment
Plant Name
and Place ID
Number
Does This
Plant Treat
Wastewater
Generated
Outside the
UWMP
Service Area?
(OPTIONAL)
2025
Volume of
Wastewater
Received
from UWMP
Service Area
(As
Reported in
Submittal
Table 6-2 R)
(AF)
Total
2025
Volume
of Water
Treated
(AF)
2025 Outcomes of Treated Wastewater
Water Recycled
Within UWMP
Service Area
(enter data as
applicable)
Water Recycled
Outside of UWMP
Service Area
(enter data as
applicable)
Effluent Discharge
that is not a
Permitted
Recycled Water
Use
(enter data as
applicable)
Required
Discharge for
Instream Flow
(enter data as
applicable)
Delivered to Another Entity
for Additional Treatment
(enter data as applicable)
Treatment
Level
Volume
(AF)
Treatment
Level
Volume
(AF)
Treatment
Level
Volume
(AF)
Treatment
Level
Volume
(AF)
Treatment
Level
Volume
(AF)
Name of
other
entity
Santa Rosa
Laguna
Subregional
Water
Reclamation
Facility,
Place ID
255703
Yes 21,973 21,973 Tertiary 21,973 0 0 0 0
Total 21,973 21,973 21,973 0 0 0 0
City of Santa Rosa 6-20 2025 Urban Water Management Plan June 2026
6.3.3 Projected Uses of Recycled Water for Regional System The Santa Rosa Regional Water Reuse System is an increasingly complex system that must work continuously to balance the wastewater disposal needs of a growing population with new government regulations, ongoing contractual obligations, and the varied demands of recycled water users.
Financial feasibility plays a significant role in determining the use of recycled water and implementation of recycled water projects. Recycled water distribution systems require additional pipelines, storage tanks, and pumps. Proximity to the production of the recycled water distribution system is a major factor affecting the financial feasibility of recycled water projects.
The City’s current and historical use of recycled water for urban customers has been limited to areas within proximity to the Regional System’s distribution network. In the last five years, the City has used on average 98 AFY of recycled water for urban landscape irrigation within the urban service area.
In 2001, the City undertook development of the IRWP and adopted the IRWP Master Plan in 2004. This included plans for recycled water urban reuse efforts and investigated several potentially new (and the possible augmentation of existing) recycled water use s, including urban reuse, agriculture, Geysers Recharge Project, and created wetlands. The IRWP outlined a water recycling alternative that could replace the City’s potable water sources (not including private groundwater supply sources) up to a maximum of 2,200 AFY upon implementation and 4,400 AFY by 2020 depending on wastewater disposal capacity need.
In April 2005, the City began work on the City’s Urban Reuse Project expansion conceptual plan, which analyzed several alternatives for expanded urban reuse within the City service area. In September 2006, the BPU approved contracts for pre-design of a phased urban reuse project with ultimate service to most of the south and west portions of the City, and a total delivery of 3,000 AFY to sites which would otherwise be served by potable water. In December 2007, the City approved the Santa Rosa Urban Reuse Project which could serve up to 3,000 AFY of recycled water to current and future approved water uses, primarily landscape irrigation. This project would be implemented in phases as needed for water supply offset and wastewater disposal capacity. The phased nature of the urban reuse alternative allows City policy makers to develop this water supply source incrementally as more supply is needed, while continuing to evaluate other potentially more cost effective water supply sources for future water supply need s.
The City selected Phase 1 West as the first phase of the Urban Reuse Project to be implemented. Phase 1 West was designed to provide up to 750 AFY of recycled water. The City initiated a small segment of this project in 2009. Based on the projected water s upply and wastewater disposal capacity needs, it was determined that the City will not need to complete construction of Phase 1 West. Due in part to the City’s success in reducing potable water demands and the projected continuation of water conservation practices, the City has determined that it is not cost effective to expand the recycled water distribution system through the UWMP planning period. However the City is always open to exploring new opportunities regarding water supplies and if the right opportunity were presented, the City would re-evaluate the expansion of the recycled water system.
The current and projected volume of recycled water to be beneficially used within the City’s service area is shown in Table 6-11.
City of Santa Rosa 6-21 2025 Urban Water Management Plan June 2026
TABLE 6-11: RECYCLED WATER DIRECT BENEFICIAL USES WITHIN SERVICE AREA (DWR TABLE 6-4 RETAIL)
Check box if recycled water is not used and is not planned for use within the service area of the supplier. The supplier will only complete the column on "Potential Recycled Water Use" and submit an accompanying narrative on the feasibility of that potential recycled water use.
Name(s) of Facility/ies Producing (Treating)
the Recycled Water (OPTIONAL) : Laguna Treatment Plant
Name of Supplier Operating the Recycled
Water Distribution System (OPTIONAL) :
Volume of Supplemental Water Added in
2025 (OPTIONAL) :
Source of 2025 Supplemental Water
(OPTIONAL) :
Use Type
Potable or
Non-
Potable
(after
treatment if
treated)
(OPTIONAL)
Additional
Information
(as needed)
2025
(AF)
2030
(AF)
2035
(AF)
2040
(AF)
2045
(AF)
2050
(AF)
Potential
Recycled Water
Use
Vol-
ume
Narrative
page
number
(OPTIONAL)
Landscape
irrigation
(exc golf
courses)
Non-
Potable
Parks, medians,
HOAs,
Commercial
landscapes,
Multifamily
residential
common areas
74 140 140 140 140 140
Subtotal Potable 0 0 0 0 0 0 0
Subtotal Non-Potable 74 140 140 140 140 140 0
Total 74.1 140 140 140 140 140 0 0
City of Santa Rosa 6-22 2025 Urban Water Management Plan June 2026
Projections for total recycled water use for the Regional System were made in the City’s 2020 UWMP. Table 6-12 shows a comparison of the total projected 2025 recycled water use from the City’s 2020 UWMP with the Regional System’s actual recycled water use in 2025.
TABLE 6-12: 2015 UWMP RECYCLED WATER USE PROJECTION COMPARED TO 2020 ACTUAL (DWR TABLE 6-5 RETAIL)
Check the box if recycled water was not used in 2025 nor previously projected for use in 2020.
Use Type
Drop Down list
2020 Projection
for 2025 (AF)
2025 Actual
Use (AF)
Landscape irrigation (exc golf courses) 140 74
Total 140 74
As part of the Santa Rosa Urban Reuse Project, the City instituted incentives for retrofitting existing potable irrigation water use to recycled water use. The incentives include a decreased user charge for recycled water customers and paying for the cost to retrofit existing potable water irrigation customers to recycled water use. In addition, the City adopted a Recycled Water Ordinance, granting the City the authority to require new connections to the water system to use recycled water for appropriate uses.
In addition, the City’s wholesaler, Sonoma Water, encourages recycled water use by collecting, as part of its water rates, funds to be held in a special reserve for projects carried out by its water customers.
As described above, the City has determined that continued expansion of the Urban Reuse Project is not cost effective for the foreseeable future. Therefore, Table 6-13 has not been completed beyond indicating the City does not plan to expand recycled water use in the future.
TABLE 6-13: METHODS TO EXPAND FUTURE RECYCLED WATER USE (DWR TABLE 6 -6 RETAIL)
Check the box if the Supplier does not plan to expand recycled water use in the future. Supplier will not complete the table below but will provide narrative explanation.
Section 6.3.3 Provide page location of narrative in the UWMP Name of Action Description Planned Implementation Year Expected Increase in Recycled Water Use (AF)
Total (AF) 0
Unit Conversion to AF 0
6.3.4 Surface Water Rights
The City does not currently have, nor is it currently planning to develop, a source of surface water to meet future demand, independent of the water purchased from Sonoma Water (as described in Section 6.1).
City of Santa Rosa 6-23 2025 Urban Water Management Plan June 2026
6.4 Storm Water Diversions
The City of Santa Rosa and most development projects within the City must meet Regional Water Quality Control Board (RWQCB) requirements to reduce stormwater pollution, protect water quality of local waterways, and promote groundwater recharge. The City’s stormwater requirements prioritize the use of infiltration-based landscape features for stormwater treatment. Low Impact Development (LID) features utilize the natural cleaning properties of soil, plants, and microbial activity to breakdown pollutants and allow for stormwater to recharge groundwater aquifers and maintain stream flow. These LID features are required on developments that create 5,000 square feet or more of impervious surface. Any increase in runoff volume from a developed site (for a storm up to 1 inch in a 24-hour period) must be infiltrated back into the soil or stored and reused on site. Additionally, runoff from all paved areas and rooftops must be filtered through these landscaped features to remove pollutants. These policies help to hydraulically mimic the undeveloped condition which provides aquifer recharge, preserves stream flow, cleans storm water, and reduces demand on potable water for irrigation.
As part of the WSAP, the City is exploring opportunities to divert and reuse stormwater for water supply purposes. Per the Storm Drain System Master Plan, four locations in Santa Rosa have been identified as ideal candidate sites for flood reduction and stormwater retention. Santa Rosa is exploring these sites through additional analysis for potential water supply purposes.
6.5 Desalinated Water
The City does not currently have, nor is it currently planning to develop, a desalinated water supply. Because the City’s service area is too far from saline water sources, importing saline water for desalination and disposing of the resulting brine is not financially feasible. Furthermore, the local groundwater and surface water supplies do not require desalination.
As part of the WSAP, the City explored a regional partnership with nearby municipalities who have access to brackish water: City of Petaluma and Marin Municipal Water District (Marin Water). The City and Marin Water could partner in constructing a desalination facility to augment Marin Water’s local water supply and the City’s Sonoma Water supply via water exchanges. Provided that the desalination facility would be within the jurisdiction of Marin Water, an exchange could be completed where the City receives a portion of Marin Water’s Sonoma Water allocation, and the desalinated water is used directly by Marin Water. Since the Sonoma Water aqueduct would be an integral component of operations, the exchange concept would not reduce reliance on the Sonoma Water system overall, but it would reduce overall reliance on the Russian River.
Regional and local desalination is not cost effective at this time, is resource intensive, faces significant regulatory and permitting challenges, and therefore there are no plans to move desalination projects forward during this UWMP period.
6.6 Water Exchanges and Transfers
Currently, the City does not transfer or exchange water with entities or third parties that are not also Water Contractors of Sonoma Water and does not anticipate that transfers or exchanges will happen with such parties in the future.
City of Santa Rosa 6-24 2025 Urban Water Management Plan June 2026
Water transfers and exchanges between Sonoma Water’s Water Contractors are authorized under the Restructured Agreement and have occurred between Sonoma Water’s Contractors in the past and may be necessary in the future.
6.7 Future Water Projects
As described in Chapter 7, the City will have sufficient supplies to meet the 2050 demand projections.
However, to ensure supply availability and reliability, the City will continue to evaluate the potential to develop additional supplies including possible further utilization of the City’s groundwater resources.
In addition to the two production wells (Farmers Lane Wells 1 and 2), described above, the City has several stand by emergency wells in rehabilitation. Since the mid 1990’s, Santa Rosa has had an adopted Capital Improvement Program for the development of t he City’s groundwater resources to provide additional emergency groundwater supply suitable for potable use by the City. However, in early 2022, the City started the process of developing a new plan to guide the City in its water supply options, including groundwater development. This new plan, entitled the Water Supply Alternatives Plan (WSAP) outlined various supply options including the development of new production wells, conversion of emergency wells to production wells and exploration of aquifer storage and recovery wells.24 This Plan supersedes the Groundwater Master Plan, which identified new emergency groundwater supplies as the priority for the City. With the WSAP, the City anticipates developing new production groundwater wells, up to approximately 3,100 AF in 2035 and 4,100 AFY starting in 2040 including the current groundwater supply of approximately 2,300 AF. Table 6-14 represents the cumulative impact of known, planned projects through the WSAP.
In addition to new groundwater supplies, the City, through the WSAP, explored 18 different supply options ranging from new groundwater supplies, purified recycled water, desalinization, stormwater reuse, and enhanced water efficiency programs. From the ini tial screening, 11 options were deemed infeasible due to lack of available space, because regional efforts are already planned that pertain to that option, or they were deemed not to be cost effective. The remaining seven options were graded and ranked on:
• cost effectiveness,
• scalability,
• resiliency,
• equity,
• environmental performance,
• legal, permitting, and regulatory challenges,
• city control and interagency coordination,
• and multi-benefits.
From that screening, four portfolios of supply options were developed. Portfolio four “most adaptive” is currently being implemented by the City, which includes adding extraction wells, converting emergency wells to production wells, adding aquifer storage and recovery wells, and enhanced water efficiency programs. Consideration is given for potential future implementation of satellite direct potable reuse, regional direct potable reuse, and stormwater storage in aquifer.
24 https://www.srcity.org/OurWaterFuture
City of Santa Rosa 6-25 2025 Urban Water Management Plan June 2026
As described in Sonoma Water’s 2025 UWMP, additional water supply, water supply diversion facilities, and water supply transmission capacity are planned through 2050. Those future projects that may contribute to the City’s water supply are summarized in Sonoma Water’s 2025 UWMP.
TABLE 6-14: EXPECTED FUTURE WATER SUPPLY PROJECTS OR PROGRAMS (DWR TABLE 6-7 RETAIL)
Check the box if there are no expected future water supply projects or programs that provide a quantifiable increase to the agency's water supply.
Proceed to the next table.
Check the box if some or all of the supplier's future water supply projects or programs are not compatible with this table and are described in a narrative format.
Section 6.7 Provide page location of narrative in the UWMP Name of
Future
Projects or
Programs
Joint Project with
other suppliers?
Additional
Description
(as needed)
Potable or
Non-
Potable
(after
treatment if
treated)
(OPTIONAL)
Planned
Implementation
Year
Planned for
Use in Year
Type
Expected
Increase in
Water
Supply to
Supplier
(This may
be a
range) (AF)
(yes/no)
If Yes,
Supplier
Name
Water
Supply
Alternatives
Plan
No
See more
details in
Section 6.7
Potable 2035-2040 All Year
Types 800 - 1,800
NOTES: There are other potential supply options that may be implemented. Future UWMPs will continue to be revised as new projections are known with more certainty.
6.8 Summary Of Existing And Planned Sources Of Water
A summary of the City’s existing sources of potable and non-potable water is provided in Table 6-15 (DWR Table 6-8).
City of Santa Rosa 6-26 2025 Urban Water Management Plan June 2026
TABLE 6-15: WATER SUPPLIES – ACTUAL (DWR TABLE 6-8 RETAIL) Water Supply
Additional
Description
(as needed)
2025
Category
Potable or
Non-Potable
(after treatment
if treated)
(OPTIONAL)
Actual
Volume
(AF)
Total
Entitlement
(OPTIONAL)
(AF)
Purchased or Imported Water Sonoma Water Potable 15,846 Groundwater (not desalinated) City production wells Potable 1,326 Recycled Water Santa Rosa Regional
Reuse Facility Non-Potable 74
Subtotal Potable 17,172 0
Subtotal Non-Potable 74 0
Total 17,246 0
A summary of the City’s planned sources of water is provided in Table 6-16 (DWR Table 6-9).
TABLE 6-16: WATER SUPPLIES – PROJECTED (DWR TABLE 6-9 RETAIL) Water Supply
Potable or
Non-
Potable
(after
treatment if
treated)
(OPTIONAL)
Projected Water Supply (Report to the Extent Practicable) 2030 2035 2040 2045 2050
Reasonably
Available
Volume (AF)
Reasonably
Available
Volume (AF)
Reasonably
Available
Volume (AF)
Reasonably
Available
Volume (AF)
Reasonably
Available
Volume (AF)
Purchased or
Imported Water Potable 29,100 29,100 29,100 29,100 29,100 Groundwater (not
desalinated) Potable 2,300 3,100 4,100 4,100 4,100
Recycled Water Non-
Potable 140 140 140 140 140
Subtotal Potable 31,400 32,200 33,200 33,200 33,200
Subtotal Non-Potable 140 140 140 140 140
Total 31,540 32,340 33,340 33,340 33,340
6.8.1 Estimated Supply for Drought Risk Assessment
This section provides estimated potable and non-potable water supplies for the next five years (2026-2030), assuming the hydrology is equivalent to the driest five-year period on record (1987-1991). These estimates
City of Santa Rosa 6-27 2025 Urban Water Management Plan June 2026
will be used to evaluate the reliability of the City’s water service if a drought were to occur in the upcoming five years. These estimated water supplies for 2026 -2030 under dry conditions have been integrated into the DRA detailed in Chapter 7.
Sonoma Water assessed its water supply for 2026 -2030 assuming dry conditions equivalent to the driest five-year period on record (1987 -1991). Sonoma Water determined it could provide supplies equal to unconstrained City potable demands (less the volume of groundwater supplies available) for each of the upcoming five years if a similar drought occurred.
The City assessed its potable groundwater supply availability for 2026 -2030 assuming dry conditions equivalent to the driest five-year period on record. The City reviewed groundwater volumes it has extracted over the past ten years (2014 -2024) for potable water supply, during the recent historic drought (2020 - 2022). The City considered the fact that its production wells were not impacted during that period and consistently returned to artesian conditions quickly even after continuous full time use over six to seven dry months each year, including during the recent historic drought. Therefore, the City’s groundwater supply is not projected to have a shortfall in the upcoming five years. The City projects having 2,300 AFY of groundwater available.
Recycled water demands within the City (140 AFY) is less than one percent of the total recycled water production volume, and urban recycled water customers are prioritized for deliveries over other uses of recycled water to interruptible customers outside the City’s urban area. During the recent historic drought (2020-2022), there was no reduction in deliveries of recycled water to urban customers. The City’s source of non-potable water (recycled) is not projected to have a shortfall in the upcoming five years. The City projects having 140 AFY of recycled water available.
The 2026-2030 water supply projections for potable and non -potable water sources are shown in Table 6-17. These projections assume the years 2026 through 2030 will be hydrologically equivalent to the driest five-year period on record.
TABLE 6-17: 2026-2030 PROJECTED WATER SUPPLY, ASSUMING DRY CONDITIONS, AF Supply 2026 2027 2028 2029 2030
Purchased
Water (potable) 15,361 15,849 16,337 16,826 17,314
Groundwater
(potable) 2,300 2,300 2,300 2,300 2,300
Non-potable
(recycled) 140 140 140 140 140
Total 17,801 18,289 18,777 19,266 19,754
City of Santa Rosa 6-28 2025 Urban Water Management Plan June 2026
6.9 Climate Change Impacts to Supply
The City’s water supply is not vulnerable to these climate change impacts listed in the Climate Change Handbook for Regional Water Planning25:
• No portion of the City’s water supply comes from snowmelt. • No portion of the City’s water supply comes from the Delta, is imported from the Colorado River, or is imported from other climate-sensitive areas.
• No portion of the City’s water supply comes from coastal aquifers, and salt intrusion has not been a problem in the past.
• Sonoma Water’s water supply does not have difficulty in storing carry over water from year to year; the available storage volume can meet several years’ water demand. • The City has not experienced a drought that has caused it to not meet local water demands. • The region does not have invasive species management issues at the water supply facilities.
Although the specific impacts listed above are not applicable to the City’s water supply, Santa Rosa is expected to experience the effects of climate change including increased minimum and maximum temperatures, increased seasonality of precipitation, incre ased extreme heat in number of days and heat wave duration, increased extreme precipitation events including intensity and frequency, increased drought likelihood and increased wildfire risk and area burned.26 These projected changes are likely to increase peak demand, increase extreme events such as landslides and flash flooding, increase stress in native vegetation providing additional fuel for wildfires, and impact the community through decreased tourism, inc reased demand for emergency services, and increase demand for public spaces and water dependent recreation that provide relief from extreme heat.
Sonoma Water has been funding a series of ongoing studies to evaluate the potential effects of climate change on Sonoma Water’s water supply. The results of the studies may allow Sonoma Water to evaluate future climate change impacts on the water demands of the City, as well as other Water Contractors, and in turn provide the basis for future UWMPs. For additional information, see Sonoma Water’s 2025 UWMP .
6.10 Energy Intensity
In accordance with CWC Section 10631.2(a), the energy intensity to provide water service to the City’s customers over a one-year period is presented in this section to the extent that the information is available.
The amount of energy to divert, pump, treat, and distribute the City’s water supply within the system that it owns and operates is included.
Water energy intensity is the total amount of energy, calculated on a whole system basis, used to deliver water to the City’s retail and wholesale customers for use. Energy intensity is the total amount of energy in kilowatt hour (kWh) expended on a per ac re foot basis to take water from the City’s source to its point of
25 Climate Change Handbook, US Environmental Protection Agency and California Department of Water Resources, November 2011. 26 Cal Adapt (https://cal-adapt.org) using high emissions scenario for 2050/mid-century (average of 2035-2064) and 2100/late century (average of 2070–2099) time periods compared to average conditions between 1961–1990.
City of Santa Rosa 6-29 2025 Urban Water Management Plan June 2026
delivery. Understanding the whole system energy intensity has allowed the City to make informed strategies in managing its water supplies and operating its system as follows:
• Identifying energy saving opportunities as energy consumption is a significant portion of the cost of delivering water;
• Calculating energy savings and greenhouse gas emissions reductions associated with water conservation programs;
• Applying for (and receiving) grants for energy efficiency efforts tied to water conservation programs;
• Informing climate change mitigation strategies; and
• Benchmarking of energy use at each water acquisition and delivery step and the ability to compare energy use among similar agencies.
In Table 6-18 below, the energy intensity of the City’s water service is calculated for 2024 as it reflects a typical year’s energy use. The total energy intensity for the City’s water service in 2024 was 206 kWh/AF.
City of Santa Rosa 6-30 2025 Urban Water Management Plan June 2026
TABLE 6-18: ENERGY INTENSITY – MULTIPLE WATER DELIVERY PRODUCTS (DWR TABLE O-1C) Start Date of Reporting
Period 1/1/2024
Only for Water Delivery Products Under the Urban Water Supplier's Operational Control End Date of Reporting Period 12/31/2024
Is upstream embedded
energy in the values
reported?
No
Water Management Processes
Non-Consequential
Hydropower
(if applicable) Units of Measure for
Water AF
Extract and
Divert
Place into
Storage Conveyance Treatment Distribution Total
Utility
Hydrop
ower Net Utility
Total Volume of Water Entering Each
Process for All Product Types 1001 17196 17196 N/A Retail Potable Deliveries (%) 100% 100%
Enter in
Column C
of table
below
Retail Non-Potable Deliveries (%)
Wholesale Potable Deliveries(%)
Wholesale Non-Potable Deliveries (%)
Agricultural Deliveries (%)
Environmental Deliveries (%)
Other (%)
Total Percentage [must equal 100%] 100% 0% 0% 0% 100% N/A 0% N/A Total Energy Consumed by Each
Process for All Product Types (kWh) 913,523 2,627,815 3,541,338 3,541,338 Energy Intensity (kWh/vol. converted
to MG) 2800.1 0.0 0.0 0.0 469.0 N/A 0.0 N/A
City of Santa Rosa 6-31 2025 Urban Water Management Plan June 2026
Product Type
Delivery Volume by
Product (volume units
defined above)
Total Energy Intensity
(kWh/volume)
Net Energy Intensity
(kWh/volume)
Retail Potable 17,196 205.9 205.9
Retail Non-Potable - - Wholesale Potable - - Wholesale Non-Potable - - Agricultural - - Environmental - - Other - - Total of All Products 17196 205.9 205.9
City of Santa Rosa 6-32 2025 Urban Water Management Plan June 2026
As discussed in Section 6.4, the City operates a local wastewater collection system to collect wastewater within the City’s water service area, a regional wastewater treatment system, and a recycled water system.
The energy intensity associated with these systems for 2024 is provided in Table 6-19.
TABLE 6-19: ENERGY INTENSITY – WASTEWATER AND RECYCLED WATER (DWR TABLE O-2) Start Date of Reporting Period 1/1/2024 Only for Water Delivery Products Under the Urban Water Supplier's Operational Control End Date of Reporting Period 12/31/2024 Is upstream embedded energy
in the values reported? No Water Management Process
Units of Measure for Water AF Collection /
Conveyance Treatment Discharge /
Distribution Total
Volume of Wastewater Entering Process
(volume units selected above) 21,973 21,973
Wastewater Energy Consumed (kWh) 499,009 499,009
Wastewater Energy Intensity (kWh/volume
converted to MG) 70 - - 70
Volume of Recycled Water Entering Process
(volume units selected above)
21,973 89 22,062
Recycled Water Energy Consumed (kWh) 28,437,717 2,193,923 30,631,640 Recycled Water Energy Intensity
(kWh/volume converted to MG) - 3,972 75,651 4,261
City of Santa Rosa 7-1 2025 Urban Water Management Plan June 2026
7. WATER SERVICE RELIABILITY AND DROUGHT RISK ASSESSMENT This chapter describes the long-term reliability and vulnerability of the City’s potable and non-potable water supplies under varying conditions. It considers the City’s ability to meet water needs through 2050 under normal conditions, single-dry year conditions, and five consecutive dry year periods. In addition, this chapter meets the requirement to provide a Drought Risk Assessment (DRA) which considers water supply and demand under the assumption that the next five years (2026 2030) will experience a drought that is hydrologically equival ent to the driest five consecutive years on record. The water service reliability assessment through 2050 and the DRA for 2026 -2030 combine the details of the water use analysis in Chapter 4 and the water supply analysis in Chapter 6.
The City’s planned and implemented water management tools for increasing the reliability of water supplies through 2050 are also addressed. Shorter term reliability responses for scenarios that may require immediate action during a severe dry period or a catastrophic supply interruption are addressed in Chapter 8 and Appendix F. Ongoing demand management measures and water use efficiency programs that help ensure water is used wisely by customers during all water supply conditions are discussed in Chapter 9.
7.1 Constraints on Water Sources
This section addresses potential legal, environmental, water quality, and climatic effects on the reliability of water supply sources through the year 2050, which is the planning horizon of this UWMP. The City’s water supply sources (contract water, groundwater, and recycled water) are each discussed separately
7.1.1 Sonoma Water Supply Constraints
An overview of the conditions that could affect Sonoma Water’s water supply is provided below. Additional information about the reliability of Sonoma Water supply can be found in Sonoma Water’s 2025 UWMP.
Various conditions may influence the water supply available to Sonoma Water. This section of the plan describes the water rights held by Sonoma Water and the City’s entitlement to Sonoma Water’s water supply. This section also describes the various physica l and legal conditions that may influence the water supply availability, including the Biological Opinion (BO), issued by the National Marine Fisheries Service (NMFS) in 2008 and revised in 2025, and future operation of the Potter Valley Project (PVP). Fin ally, this section describes the process by which Sonoma Water determined how much water may be delivered through the 2050 planning period under normal, single-dry, and dry five-year period hydrologic conditions.
7.1.1.1 Water Rights of Sonoma Water
Four SWRCB permits27 currently authorize Sonoma Water to store water in Lake Mendocino (up to 122,500 AF) and Lake Sonoma (up to 245,000 AF) and to divert and redivert 180 cubic feet per second (cfs) of water from the Russian River, up to 75,000 AFY.
The permits also establish minimum instream flow requirements for fish and wildlife protection and Russian River recreational considerations. These minimum instream flow requirements vary according to the hydrologic cycle (i.e., dry water years versus norm al water years) defined by the SWRCB’s Decision 1610.
27 State Water Board Permit Numbers 12947A, 12949, 12950, and 16596.
City of Santa Rosa 7-2 2025 Urban Water Management Plan June 2026
Sonoma Water meets the various instream flow requirements set by Decision 1610 by making releases from Coyote Valley Dam and Warm Springs Dam. As required by the BO, Sonoma Water has applied to the SWRCB to make changes to the minimum instream flow require ments of Decision 1610. The BO requirements are discussed below.
Sonoma Water also has three groundwater wells that provide water supply. They are located near the Laguna de Santa Rosa and feed directly into Sonoma Water’s Russian River Cotati Intertie Pipeline. Sonoma Water estimates the future production capacity of these wells at 2,300 AFY.
7.1.1.2 Restructured Agreement
The Restructured Agreement was executed in 2006, and generally provides for the finance, construction, and operation of existing and new diversion facilities, transmission lines, storage tanks, booster pumps, conventional wells, and appurtenant facilities. The Restructured Agreement currently provides the contractual relationship between Sonoma Water and the City and includes the City’s various rights to water service, including specific rates of delivery and maximum amounts of water that Sonoma Water is obligated to supply to the City. The Restructured Agreement defines the City’s entitlement as 29,100 AFY and an average of 40.0 mgd from Reach 1, 2 and 3a of the Intertie Aqueduct, 40.0 mgd from the Santa Rosa Aqueduct, 4.0 mgd from the Sonoma Aqueduct, or a maximum combined average total of 56.6 mgd for a one month period from all aqueducts.
Though the City’s existing supply from Sonoma Water is relatively reliable, the Restructured Agreement contains provisions in Section 3.5 which may be implemented in the event of a supply shortage. The shortage provisions are further defined in the Water Shortage Allocation Methodology (Shortage Methodology), which was initially adopted by the Sonoma Water Board in April 2006. 28 The Restructured Agreement Section 3.5 provisions and the Shortage Methodology are designed to take the demand hardening associated with water conservation into account. The City has implemented an aggressive water conservation program over the past 35 years and has one of the lowest per capit a water uses among all Sonoma Water customers. This is recognized by the Shortage Methodology which encourages water conservation. Under the Shortage Methodology, if Sonoma Water surface water rights and Russian River supply remain limited to 75 ,000 AFY and the Water Contractors’ total demands reach Sonoma Water’s 75,000 AFY available supply, then the City’s allocation would still be 29,100 AFY, the City’s full entitlement under the Restructured Agreement.29
7.1.1.3 Threatened and Endangered Species
On October 31, 1996, NMFS published a final notice of determination listing coho salmon as threatened under the federal Endangered Species Act (ESA) within the Central California Coast Evolutionarily Significant Unit (ESU), which includes the Russian River . On August 18, 1997, NMFS published a final notice of determination listing steelhead as threatened under the ESA within the Central California Coast ESU, also including the Russian River. On September 16, 1999, NMFS listed the California Coast ESU of Chi nook salmon as threatened.
28 John O. Nelson Report, April 2006.
29 Letter from Sonoma County Board of Supervisors, April 2006.
City of Santa Rosa 7-3 2025 Urban Water Management Plan June 2026
In accordance with Section 7(a)(2) of the ESA, federal agencies must consult with the United States Fish and Wildlife Service and/or NMFS (depending on the species) to “ensure that any action authorized, funded, or carried out by such agency is not likely to jeopardize the continued existence of any listed species or result in the destruction or adverse modification of designated critical habitat….” (50 CFR Section 402). The operation of Warm Springs and Coyote Valley dams and Sonoma Water’s rubber dam and fish screens all fall within the provisions of Section 7 of the ESA. In December 1997, the US Army Corp of Engineers (USACE), as the federal sponsor of the above two flood control and water supply projects, and Sonoma Water, as the local sponsor, entered into a Memorandum of Understanding with NMFS to begin the Section 7 consultation process. As part of the Section 7 consultati on, a Biological Assessment was prepared to study the impact of current and potential future operations of facilities on the listed species in the Russian River.
The final Biological Assessment was completed in September 2004.
As part of the Section 7 consultation process, the NMFS formed Biological Review Teams to conduct a status review of the three listed fish species by assembling the best available information on the condition of the fish species and quantifying risks faced by each ESU. Using the results of the status review, NMFS reevaluated the listing of the three fish species. On June 28, 2005, NMFS issued a final rule listing the status of coho as endangered and maintaining the threatened status of California Coast Chin ook salmon. On January 5, 2006, NMFS issued a final determination listing the steelhead as threatened. 30 On September 24, 2008, NMFS issued the first BO with the second issued on April 29, 2025. Both Biological Opinions analyzed the impacts of the current operation of the Warm Springs and Coyote Valley Dams as well as other facilities operated by the USACE, S onoma Water, and the Russian River Flood Control and Water Conservation Improvement District in the Russian River Watershed for the subsequent 15 years. The 2008 BO determined that the continued operation of some aspects of the flood control and water supp ly operations will have substantial adverse effects on both the coho salmon and steelhead but are not likely to impact the survival and recovery of the Chinook salmon in the Russian River. The three areas of most concern are the high summertime flows in th e Russian River and Dry Creek, the high velocity of water in Dry Creek in the summer, and the current practice of breaching the sandbar at the estuary during the summer months.31
In the 2008 BO, NMFS collaborated with the USACE and Sonoma Water to develop a Reasonable and Prudent Alternative, including eight Reasonable and Prudent Measures (RPMs), to implement over a 15- year timeframe to avoid jeopardy to the coho salmon and steelhead. The RPMs include the following:
interim and permanent changes to the summertime flows in the Russian River and Dry Creek; changing the management of the Jenner estuary; restoring fish habitat along Dry Creek; conducting a feasibility study of constructing a pipeline to deliver water from Lake Sonoma to the mainstem of the Russian River; strengthening and expanding the existing coho broodstock program; installation of a new back up water supply pipeline to the Warm Springs Hatchery and construction of a dditional rearing facilities for the coho broodstock program; and monitoring of habitat and fish in the Russian River, Dry Creek, and the Jenner estuary.
30 National Marine Fisheries Service, Southwest Region, Biological Opinion for Water Supply, Flood Control Operations, and Chann el Maintenance conducted by the U.S. Army Corps of Engineers, the Sonoma County Water Agency, and the Mendocino County Russian River Flood Control and Water Conservation Improvement District in the Russian River watershed, September 24, 2008. 31 Sonoma County Water Agency, Russian River Instream Flow and Restoration, The Biological Opinion: Frequently Asked Questions, October 2008.
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Fish habitat restoration work and monitoring have been steadily implemented, under review by NMFS. On October 4, 2018, NMFS reported in a letter to USACE that implementation of Dry Creek habitat restoration work has been “tremendously successful to date” a nd has allowed “critical water supply and dam safety operations to continue unconstrained while also producing demonstrable benefits to the three ESA listed salmonid species that inhabit the watershed.”32
The 2008 BO also provides an Incidental Take Statement for the taking of the coho, steelhead and Chinook that may occur due to the implementation of the continued operations of the flood control and water supply operations and the associated RPMs.
The 2008 BO originally required, and was reaffirmed by the 2025 BO, the following temporary and permanent changes to the minimum instream flows in the Russian River and Dry Creek:
During Normal Years:
• Reduce the minimum flow requirement for the Russian River from the East Fork to Dry Creek from 185 cfs to 125 cfs between June 1 and August 31; and from 150 cfs to 125 cfs between September 1 and October 31.
• Reduce the minimum flow requirement for the Russian River between the mouth of Dry Creek and the mouth of the Russian River from 125 cfs to 70 cfs.
• Reduce the minimum flow requirement for Dry Creek from Warm Springs Dam to the Russian River from 80 cfs to 40 cfs from May 1 to October 31.
During Dry Years:
• Reduce the minimum flow requirement for the Russian River between the mouth of Dry Creek and the mouth of the Russian River from 85 cfs to 70 cfs.
In September 2009, Sonoma Water filed a petition with the State Water Board to permanently change the minimum instream flow requirements as outlined by the BO. The petition is currently pending at the State Water Board and will not be acted on until Sonoma Water has completed compliance with CEQA. Until the petition is acted upon by the State Water Board, Sonoma Water will have to file a Temporary Urgency Change petition with the State Water Board to reduce the minimum instream flows during the months of May through October as required by the BO.
The reduced flows required by the RPMs would provide enough water for Sonoma Water to meet existing water demands. The RPMs allow for restoration of fish habitat in Dry Creek to continue flows of 130 to 175 cfs to meet the water demands of Sonoma Water. 33 However, the BO clarified that, if the restoration work was not sufficiently effective, Sonoma Water would have to explore other alternatives, including a bypass pipeline. To be proactive and prudent, Sonoma Water released a draft feasibility study of a bypass pipeline in April 2011 and a final study report on September 15, 2011.
32 Letter from Sam Rauch, Deputy Assistant Administrator for Regulatory Program, National Marine Fisheries Service, to Lt. Gener al Todd Semonite, Chief of Engineers, and James Dalton, Director of Civil Works, United States Army Corps of Engineers, October 4, 2018. 33 Sonoma Water, October 2008.
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In anticipation of the expiration of the 2008 Biological Opinion in September 2023, Sonoma Water worked with NMFS, USACE, and CDFW to reinitiate consultation and develop a Biological Assessment for continuation of the USACE and Sonoma Water operations in the Russian River watershed. A draft Biological Assessment was submitted to NMFS and CDFW on December 9, 2022. 34 A final Biological Assessment was submitted to NMFS and CDFW on September 5, 2023 and further revised and clarified by subsequent letters and information from the USACE and Sonoma Water. 35 The USACE supplemented the BA with additional Proposed Actions pursuant to a November 7, 2024 settlement agreement in White v. United States Army Corps of Engineers 3:22-cv-06143-JSC (N.D. Cal.).36 A second BO was issued on April 29, 2025 and has a ten year term.37
Key elements of the Proposed Action evaluated in the new 2025 BO include continued habitat enhancement efforts in Dry Creek, revised Russian River Estuary adaptive management, studies to learn more about migration and survival of hatchery and wild salmonids, reservoir flood control and water supply operations at Coyote Valley Dam (Lake Mendocino) and Warm Springs Dam (Lake Sonoma), and time-limited changes to the Russian River Hydrologic Index (water year classifications) to be based on Lake Mendocino stora ge thresholds rather than Lake Pillsbury storage in the Eel River watershed, and request, via interim petitions, changes to Decision 1610 minimum flows during Normal and Dry hydrologic conditions in a manner consistent with the Reasonable and Prudent Alter native from the 2008 BO. USACE and Sonoma Water will also be required to continue habitat enhancement efforts in Dry Creek including adaptive management, completion of an additional mile of restoration and long term maintenance of already completed project s by Sonoma Water. The Revised Russian River Estuary Adaptive Management Plan requires habitat enhancement including construction of three to five acres of estuarine habitat enhancements targeting juvenile steelhead rearing.
The 2025 BO concluded that the Proposed Action is not likely to jeopardize the continued existence of Central California Coast coho salmon, California Coastal Chinook salmon, Central California Coast steelhead, or Southern Resident Killer Whale (newly added species in 2025 Biological Opinion), nor is it likely to destroy or adversely modify their designated critical habitat, marking a significant change due to improvement in operations and conservation measures from the 2008 BO which was a jeopardy opinion. Next steps for Sonoma Water include forming Technical Advisory working groups on reservoir operations, turbidity, Dry Creek habitat enhancement, Dry Creek joint monitoring, Estuary adaptive management, and survival studies.
In August of 2016, Sonoma Water released the Fish Habitat Flows and Water Rights Project (Fish Flow Project) Draft Environmental Impact Report (DEIR) for public review. The Fish Flow Project objectives include managing Lake Mendocino and Lake Sonoma water supply releases to provide instream flows that improve habitat for threatened and endangered fish species and updating Sonoma Water’s existing water rights to reflect current conditions. The Fish Flow Project would change Sonoma Water’s water right permits related to flows and diversions from the Russian River and Dry Creek. The new minimum instream flow requirements proposed by the Fish Flow Project were developed to meet the requirements of the 2008 and 2025 Biological Opinion to improve habitat for threa tened and endangered salmonid species. The Fish Flow
34 Sonoma Water, Russian River Biological Opinion Update, Water Advisory Committee meeting, May 1, 2023. 35 Environmental Science Associates, Biological Assessment and Essential Fish Habitat Assessment, August 2023. 36 White v. United States Army Corps of Engineers, District Court, N.D. California, October 23, 2023. 37 National Marine Fisheries Service, West Coast Region, Endangered Species Act Section 7(a)(2) Biological Opinion and Magnuson - Stevens Fishery Conservation and Management Act Essential Fish Habitat Response for the Russian River Watershed Water Supply and Channel Maintenance Project, (April 29, 2025).
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Project does not propose to increase or otherwise change the quantities of surface water that Sonoma Water diverts under its water right permits, to obtain any new authorizations for new rights, or to construct new facilities.38 In response to release of the Draft EIR, Sonoma Water received numerous comment letters from the public and resource agencies. Based on extensive public input, Sonoma Water is currently working on revisions in anticipation of recirculating the Draft EIR. 39
7.1.1.4 Future Operation of the Potter Valley Project
Built in 1908, the PVP is a 9.4 -megawatt hydropower project located on the Eel River and the East Branch of the Russian River in Mendocino and Lake Counties, about 15 miles northeast of the City of Ukiah. PVP features include Lake Pillsbury, a 76,876 AF st orage reservoir impounded by Scott Dam, and Van Arsdale Reservoir, a 700 AF storage reservoir impounded by the Cape Horn Diversion Dam. At Van Arsdale Reservoir, a portion of the water is diverted south to the 9.2-megawatt Potter Valley Powerhouse by a series of tunnels, conduits, and penstocks that discharge into the East Branch of the Russian River which flows into Lake Mendocino where it is released and contributes various beneficial uses of water and minimum instream flow requirements in the Russian River below Lake Mendocino. The PVP is owned and operated by Pacific Gas and Electric Company (PG&E) and is governed by a Federal Energy Regulatory Commission (FERC) license that expired on April 14, 2022. In April 2017, PG&E initially notified FERC of its in tent to renew its hydropower license.
At the request of several interested entities, a PVP Ad Hoc Committee was convened by U.S. Representative Jared Huffman to enable dialogue on the terms of a potential new license. The Ad Hoc Committee is comprised of over 25 federal and state resource agen cies, local counties, tribes, and environmental organizations. Participating stakeholders committed to reaching a “Two Basin Solution” with co-equal goals of improving fish passage and habitat on the Eel River and minimizing adverse impacts to water supply reliability, fisheries, water quality, and recreation in the Russian River and Eel River basins. 40 On January 25, 2019, PG&E filed a notice of withdrawal of its Notice of Intent (NOI) and pre -application document (PAD), indicating it was discontinuing efforts to relicense the hydroelectric project. On March 1, 2019, FERC issued a Notice Soliciting Applications for any party interested in filing a license application for a new license, stating any party interested in seeking a new license needed to file an NOI and PAD by July 1, 2019. In response, a coalition of interests from Humboldt, Mendocino, and Son oma Counties (the Two- Basin Solution Partnership) undertook an effort to determine the feasibility of re -licensing the PVP. The Two-Basin Solution Partnership consisted of the following entities: California Trout, the County of Humboldt, the Mendocino County Inland Water & Power Commission, the Round Valley Indian Tribes, and Sonoma County Water Agency (Sonoma Water). Ultimately, the Two Basin Solution Partnership was unable to provide the necessary studies and information as required by FERC to re -license the project and PG&E decided to surrender its FERC license. With the project license now expired, PG&E is now operating on an annual license which will continue to be issued by FERC throughout the surrender process.
In May 2023, Sonoma Water convened the first meeting of the Russian River Water Users Forum comprised of water users that are dependent on PVP water to improve the understanding of water reliability uncertainties, help organize the water users, and eventually create a source of funding for continuing water
38 Sonoma Water, Fish Habitat Flows and Water Rights Project Draft Environmental Impact Report, August 2016. 39 Sonoma Water, May 1, 2023.
40 https://www.twobasinsolution.org/
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transfers through the PVP and/or water supply planning and project implementation in the Russian River watershed.41
Building off the work by the Russian River Water Users Forum, in late 2023, the California Department of Fish and Wildlife (CDFW), California Trout, Humboldt County, Mendocino County Inland Water and Power Commission (IWPC), Round Valley Indian Tribes (RVIT), Trout Unlimited, and Sonoma Water requested that PG&E consider a proposal for the Cape Horn Dam and Van Arsdale Diversion, called the New Eel -Russian Facility (NERF). NERF is governed by the coequal goals of improving fish migration and habitat on the Eel River and maintaining water diversion from the Eel River to the Russian River. To achieve these goals the Eel-Russian Project Authority (ERPA) was formed by a joint exercise of powers agreement between County of Sonoma, Sonoma Water, and Mendocino Inla nd Water and Power Commission. 42 ERPA will have the power to negotiate with PG&E as the utility moves forward with plans to surrender operation of the PVP and will also have the legal capacity to own, construct, and operate a new water diversion facility.
Two potential new water diversion facility alternatives were identified by ERPA – a Roughened Channel and a Pump Station alternative. After the Roughened Channel alternative scored fewer points based on biological feasibility, habitat and water quality, resiliency, cost, and more, the Pump Station alternative was selected by ERPA. The Pump Station will remove a large portion of the dam and fish barrier to the level of the existing riverbed downstream, construct a new pump station to pump Eel River water to the existing Van Arsdale Diversion via a pipeline, and install an array of screens to divert water and to screen fish. The project will also include the removal of the current Van Arsdale fish screens.
In February 2025, a Memorandum of Understanding (MOU) was entered into by the CDFW, California Trout, ERPA, Humboldt County, IWPC, RVIT, Sonoma Water, and Trout Unlimited, to state the proposed terms for a Water Division Agreement for the NERF for 30 years with an option to extend another 20 years. The MOU describes support for the transfer of the Project’s appropriative water rights from PG&E to ERPA with the transfer of the rights to RVIT immediately after the closing with PG&E. ERPA will continue to oper ate NERF to divert flow from the Eel River, with the remaining water available under the appropriative water rights for instream beneficial uses per RVIT. ERPA will pay RVIT $1,000,000 annually for use of these water rights to operate NERF in addition to a Restoration Payment of up to $1,000,000 annually in recognition of RVIT’s agreement to forbear asserting federally reserved water and fishing rights against ERPA during the term of the lease. By signing the MOU, the parties confirm their commitment to continuing efforts to finalize a Water Diversion Agreement by July 29, 2025. The final Water Diversion Agree ment was signed on July 16, 2025 and contains terms substantially consistent with the MOU.
If the PVP diversions were to cease altogether, there is the possibility that some regulatory requirements could redirect to Lake Sonoma. Sonoma Water has begun work on a viability assessment of utilizing Forecast Informed Reservoir Operations (FIRO) at Lake Sonoma. If successful, there is a possibility that Sonoma Water could work with the USACE to update the water control manual for Lake S onoma to achieve the ability to store more water in certain scenarios. It is possible that this operational change cou ld offset some of the potential impacts to Lake Sonoma from diminished diversions from the PVP.
41 https://russianriverwaterforum.org/
42 https://www.eelrussianauthority.org/
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7.1.1.5 Water Reliability Modeling For 2025 UWMP
Sonoma Water modeled the reliability of its water supply system for the Water Contractors’ use in preparing individual 2025 UWMPs. For both the normal (1999), single dry year (1977), and dry five-year period (1987- 1991) scenarios, the modeling results indicated that there would be adequate water supply to meet 100 percent of the projected demands for Sonoma Water, including demands from the City of Santa Rosa.
Sonoma Water modeled the impact of the single -dry year scenario for 1977 and projected the results for the Upper Russian River and Lower Russian River systems as follows:
• Lake Mendocino: For the single-dry year scenario, the modeling results indicated Lake Mendocino storage levels decline to the lowest level that water can be released from the reservoir for all the 2035 through 2050 single dry year scenarios. During this period, downstre am demands and minimum instream flow requirements are not met due to depleted reservoir storage and inadequate inflow into the reservoir. This result is mainly attributed to assumptions in Eel River diversions associated with PG&E’s decommiss ioning of the Potter Valley Project. Sonoma Water would need to request reductions in minimum instream flow requirements, coupled with significant demand reductions by water users that divert water from the Upper Russian River, to prevent Lake Mendocino from reaching deadpool. However, the City is not an Upper Russian River water user; therefore, these results do not directly affect water supply reliability for the City. • Lake Sonoma: There are no expected shortages in Lake Sonoma in any conditions including single dry year, multiple dry years, or drought years. However, if a water supply condition were to occur, water would be allocated among the Water Contractors in conformance with the adopted Shortage Methodology in accordance with Section 3.5 of the Restructured Agreement, as described above.
7.1.2 Groundwater Supply Constraints
The City’s current groundwater supply from the Farmers Lane wells is constrained by the existing pumping capacity and operations protocol which are based on an assumption that the Farmers Lane wells can be operated as much as 40 to 70 percent of the time a t a pumping rate of 2,000 gpm. The estimated annual pumpage quantity is also constrained based on the limited information available regarding annual natural recharge to the area. However, the wells have historically returned to artesian condition quickly e ach year, even after continuous use for up to eight months per year, including each year of the recent historic drought (2014-2016 and 2020-2022).
As mentioned in Chapter 6, the USGS completed a study of the Santa Rosa Plain Groundwater Subbasin in 2013, in collaboration with Sonoma Water, the cities of Cotati, Rohnert Park, Santa Rosa and Sebastopol, the town of Windsor, the County of Sonoma, and the California American Water Company. The Santa Rosa Plain Groundwater Subbasin Groundwater Sustainability Plan (GSP) relied heavily on the USGS study for basin characterization, while also providing additional basin information. Key findings from these documents are described belo w along with other available data with respect to groundwater quality, groundwater level trends, and groundwater storage and budget.
7.1.2.1 Groundwater Quality
The GSP summarizes the localized groundwater quality issues across the Santa Rosa Plain Subbasin based on concerns and trends observed through various studies and regulatory programs, including:
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• DWR periodic sampling of private wells (1950s to 2010) • Groundwater Ambient Monitoring and Assessment (GAMA) studies of public water -supply wells (Kulongoski et al. 2006) and private domestic wells (Bennett et al. 2014) 43 • USGS 2013 study, Chapter C (Martin et al. 2013)44
• 2013 Salt and Nutrient Management Plan (SNMP) (City of Santa Rosa 2013) 45 • Data from regulated public water-supply system sampling • Regulated contaminant sites
The GSP finds that groundwater quality is generally suitable for beneficial uses, but localized impairments exist due to natural geologic conditions and anthropogenic activities such as agriculture, urban development, and industrial operations. The 2013 USGS study highlights that many wells in the Santa Rosa Plain Subbasin produce high quality water, but naturally occurring elements such as iron, manganese, boron, and arsenic are variable in groundwater and can pose problems in some areas.
Areas of elevated arsenic concentrations are most notable in the northeastern portions of the Subbasin, immediately south of the City of Santa Rosa, in the vicinity of the City of Sebastopol and along the Trenton Fault near Mark West Creek. Many areas of h igher arsenic concentrations appear to be associated with known or inferred faults.
Elevated total dissolved solids (TDS) levels may result from both natural sources and land use sources. The Santa Rosa Plain Subbasin exhibited increasing chloride concentrations in the 2013 USGS study, but the GSP found that these have since stabilized. N itrate is typically associated with runoff from agricultural practices, but it was not found to be a concern in the majority of wells across the Subbasin. The Subbasin contains various regulated contaminated release sites that are under an active cleanup order by the SWRCB.
However, only a small number of the public and private wells sampled as part of the GAMA program had very low -level detections of volatile organic compounds and/or pesticides, but all detections were significantly below the contaminant’s respective maximum contaminant levels.
The major-ion composition of groundwater is controlled by the natural chemistry of the recharge water, geochemical reactions in the unit the water is stored in, and anthropogenic factors. Most groundwater in the Subbasin is bicarbonate -type water and range s from sodium -potassium-type water to calcium - magnesium-type water. Additionally, water samples from wells completed within the shallow aquifer system generally exhibit greater proportions of calcium and magnesium, while deep aquifer samples exhibit greater proportions of sodium and potassium.46
43 Bennett, G.L., and M.S. Fram. 2014. Groundwater -quality Data in the North San Francisco Bay Shallow Aquifer Study Unit, 2012:
Results from the California GAMA Program. U.S. Geological Survey Data Series 865. https://pubs.usgs.gov/ds/0865/pdf/ds865.pdf 44 Martin, P., L.F. Metzger, J.N. Densmore, and R.A. Schroeder. 2013. “Groundwater quality and source and age of groundwater in the Santa Rosa Plain watershed, Sonoma County, California.” Hydrogeologic and geochemical characterization of the Santa Rosa Plai n watershed, Sonoma County. Tracy Nishikawa, ed. U.S. Geological Survey Scientific Investigations Report 2013 -5118, pp. 113 -165. https://pubs.usgs.gov/sir/2013/5118/pdf/sir20135118.pdf 45 City of Santa Rosa. 2013a. Santa Rosa Plain Salt and Nutrient Management Plan. Prepared by Woodard & Curran in association with Plan Tierra. March. https://srcity.org/DocumentCenter/View/15217/Salt-and-Nutrient-Management-Plan 46 California Department of Water Resources, Evaluation of Ground Water Resources in Sonoma County Volume 2: Santa Rosa Plain, DWR Bulletin 118 4, 1982.
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According to a DWR study of the Subbasin, few wells tested for water quality contained constituents over the recommended concentration for drinking water. Some wells produced water with aesthetic problems such as elevated concentrations of iron and mangane se, or high hardness. Some private well owners questioned about groundwater quality reported complaints about the color and/or taste of the water.
Although high iron, manganese, and hardness have been reported in groundwater for some portions of the Santa Rosa Plain Subbasin, the overall quality of groundwater in the Subbasin is good 47. The sustainable management criteria for groundwater quality in the GSP are established to be protective of federal and state drinking water quality standards.
Groundwater underlying the City’s service area generally meets primary and secondary drinking water standards for municipal use. The City’s Farmers Lane wells have historically exhibited slightly elevated concentrations of both iron and manganese, exceedin g secondary drinking water standards. A treatment system for iron and manganese removal has been constructed at the site of the City’s Farmers Lane wells to treat groundwater pumped from Farmers Lane Wells Nos. 1 and 2 before entering the City’s distribution system.
7.1.2.2 Groundwater Level Trends
The DWR Bulletin 118 updated in February 2004 states that the Santa Rosa Plain Subbasin “as a whole is about in balance, with increased groundwater levels in the northeast contrasting with decreased groundwater levels in the south.” The 2013 USGS study als o found that groundwater levels in the Santa Rosa Plan Subbasin are relatively stable over time, and in the shallow aquifer range from close to ground surface near the Laguna de Santa Rosa to about 15 to 30 feet below ground surface along the eastern basin boundary and 50 feet near the southern end of the Santa Rosa Plain Subbasin. Most recently, the 2022 GSP presents a similar analysis and also found long -term trends to be stable or increasing over time, with the exception of wells within the southern portion of the Subbasin in the Cotati area.
Groundwater levels in intermediate and deeper wells in the southern Santa Rosa Plain Subbasin exhibit seasonal fluctuations and have shown a decline in groundwater levels in the late 1970s and 1980s. The declines reached a maximum in the early 1990s, follo wed by recovery in the early 2000s. The recovered groundwater levels coincide with increased conservation, reduced groundwater pumping, and increased deliveries of Russian River supplies from Sonoma Water to the City of Rohnert Park. These historical declines are primarily associated with increases in municipal groundwater pumping related to population growth through the 1990s coupled with droughts in 1976 -77 and 1987-92, and the recovered groundwater levels coincide with the aforementioned reduced pumping in this area since the early 2000s.
A review of groundwater levels in wells actively monitored by DWR generally supports these findings, in that a majority of the wells actively monitored by DWR located throughout the Subbasin have demonstrated either increasing or stable groundwater levels, indicating that the Subbasin is in balance and is not being overdrafted. An overdrafted groundwater basin would generally be characterized by groundwater levels that decline over a period of years and never fully recover, even in wet years. This is not th e case for the Santa Rosa Plain Subbasin.48
47 California Department of Water Resources, Bulletin 118 California’s Groundwater, Individual Groundwater Basin Description for Santa Rosa Valley, Santa Rosa Plain Subbasin, last update February 27, 2004. 48 City of Santa Rosa, 2035: General Plan Water Supply Assessment, Section 2.4.4.1.3.
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Groundwater level data for the City’s municipal wells were compared to historical data. For the City’s Carley Well, Peters Spring Well, and Farmers Lane Wells Nos. 1, 2 and 3, historical groundwater levels from the 1940’s and 1950’s were compared to current groundwater levels. Although the available data is limited, the data indicate for each of these wells that static (non -pumping) groundwater levels have increased significantly from 14 to 94 feet below groundwater surface in the 1940’s and 1950’s to essen tially artesian conditions (e.g., groundwater level at or above ground surface). The City’s Farmers Lane Wells Nos. 1 and 2 and Leete Well demonstrate artesian conditions, while water surface elevations in the City’s other wells are only a few feet below g round surface, indicating an abundance of groundwater in the portion of the subbasin underlying the City.
A review of hydrographs near the City’s Farmers Lane wells shows that groundwater elevations have been high (within 10 to 30 feet of the ground surface) and stable since at least 1989, indicating that groundwater recharge is taking place and that additiona l groundwater yield from this area is possible. 49 Groundwater level data collected from the Farmers Lane Wells after recent summer pumpage periods shows that water levels quickly recover to artesian conditions after the wells are turned off. The hydrographs indicate that groundwater elevations to the east of the Farmers Lane wells are significantly higher than the ground surface at the Farmers Lane wells, which provides additional explanation for the artesian conditions at the Farmers Lane wells.50
7.1.2.3 Groundwater Storage and Budget
Over the years, several estimates have been made of the groundwater storage capacity of the Santa Rosa Plain Subbasin. These estimates of storage capacity range from 948,000 AF to 4,313,000 AF.
Based on work by DWR, a brief description of each storage capacity estimate follows: 51 • Using the water level information for the spring of 1980 and the product of the TRANSCAP computer program, the volume of groundwater in storage was estimated to be 3,910,000 AF by DWR in Bulletin 118.
• USGS estimated the gross groundwater storage capacity for this basin to be about 948,000 AF based on the average specific yield of 7.8 percent for aquifer materials at depths of 10 to 200 feet. • DWR performed a study of the area in 1982 and calculated the groundwater storage capacity for this basin to be 4,313,000 AF. This calculation was made using the TRANSCAP computer program, assuming aquifer thicknesses ranged from 50 to over 1,000 feet with an average thickness of approximately 400 feet.
According to the DWR Bulletin 118, a groundwater model for the Santa Rosa Plain Subbasin was prepared by DWR in 1982. The 15-year period from 1960-61 through 1974-75 was selected as the study period for the Santa Rosa Plain Subbasin because it contained a mixture of wet and dry years approximating long - term climatic conditions. The average annual natural recharge for the period 1960 to 1975 was estimated to be about 29,300 AF. Average annual pumping during the same time period was estimated to be
49 West Yost and Associates, Technical Memorandum, Evaluation of Potential Impacts Associated with Increased Groundwater Production from Farmers Lane Wells W4 1 and W4 2, July 22, 2004. 50 City of Santa Rosa, SB 610 Water Supply Assessment for the Downtown Station Area Specific Plan Update, March 3, 2020. 51 California Department of Water Resources, February 27, 2004.
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approximately 29,700 AF, indicating that the annual natural recharge and the annual pumping within the Subbasin were essentially in balance.
The 2013 USGS study estimated changes in groundwater storage for the Santa Rosa Plain Watershed, which includes the Santa Rosa Plain Subbasin, using the GSFLOW model. USGS evaluated long term changes in storage for the period 1976 through 2010 as decreasin g by 3,300 AFY. This change in storage is very small in comparison to the overall groundwater storage in the Santa Rosa Plain Watershed. The very small change in storage is consistent with generally stable groundwater levels in the Subbasin, which indicate that groundwater storage in the Subbasin is in balance.
The GSP builds upon these previous methods and provides the most recent estimate of Subbasin change in groundwater storage. The GSP groundwater budget finds that storage declined during the historical budget period (1976 -2018) by 600 AFY and by 2,100 AFY i n the current (2012 -2018) budget period.
Therefore, the current period (which includes a drought) has larger declines in groundwater storage than the historical period. Analysis of groundwater pumping during the recent period shows the increased rate of groundwater-storage depletion appears to be more a result of a drier climate than increased pumping during that period.
With respect to the area in the vicinity of the City’s Farmers Lane wells, it has been estimated that the annual groundwater recharge to the area from which the Farmers Lane wells extract groundwater is on the order of 2,500 AFY, using historical rainfall data and an estimate of the potential recharge area. 52
7.1.3 Recycled Water Supply Constraints
The Santa Rosa Regional Water Reuse System (Regional System) produces about 18 million gallons per day of recycled water for reuse (approximately 20,000 acre-feet per year) . This recycled water meets State standards for non-potable uses and is suitable for irrigation, industrial, and agricultural purposes (but not for drinking). The system is monitored by state, local , and federal agencies to ensure compliance with applicable regulations. Santa Rosa has been safely using recycled water for over 40 years.
Over half of the Regional System’s recycled water (more than 12,000 AFY) is sent to The Geysers where it is used for geothermal power generation. Calpine Corporation (a power generation company) receives recycled water and pumps it deep underground into st eam fields to generate enough clean renewable electricity for up to 100,000 households. The remaining portion is used for agricultural on about 6,400 acres outside of the City’s urban system and for non-potable uses in the City of Rohnert Park, and a small amount is conveyed to Santa Rosa’s urban recycled water system.
On average, 140 AFY (less than one percent of the total Regional System production) is conveyed to the City’s urban recycled water system where it is distributed to customers for landscape irrigation at residential, commercial, and institutional sites within the City’s urban water system boundaries. Urban recycled water customers are given top priority for recycled water (non -interruptible supply). The urban recycled water supply has not been impacted by dry weather conditions since the inception of the urb an recycled water use program in 2009.
52 Technical Memorandum, Evaluation of Potential Impacts Associated with Increased Groundwater Production from Farmers Lane Wells W4 1 and W4 2, prepared by West Yost & Associates, July 22, 2004.
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7.2 Year Type Characterization
This section discusses the City’s potable and non-potable water supplies available during normal conditions, single-dry year conditions, and dry five-year periods.
To identify the years to use for characterizing a normal year, a single-dry year, and the five consecutive year drought conditions, the City used the following water year definitions from the DWR Guidebook. 53 • Normal Year. This condition represents the water supplies a Supplier considers available during normal conditions. This could be a single year or averaged range of years that most closely represents the average water supply available to the Supplier. In th e DWR Guidebook, DWR uses the terms average and normal interchangeably when addressing the water year type. • Single-Dry Year. The single-dry year is the year that represents the lowest water supply available to the Supplier.
• Five Consecutive Year Drought. Per Water Code, the five consecutive dry year period for the Drought Risk Assessment for 2026 -2030 would be the driest five-year historical sequence for the Supplier (Water Code Section 10612). The State encourages Suppliers to use the same five-year sequence for their water service reliability assessment. However, Suppliers may choose to use a different five consecutive year dry period such as the lowest average water supply available to the Supplier for five years in a row. Suppliers are encouraged to characterize the five consecutive year drought in a manner that is best suited for understanding and managing their water service reliability.
The City has two sources of potable water supply: Sonoma Water contract water and City groundwater wells. For these water sources, the City has identified base water years for the historical average (“normal”) year, single-dry year, and the driest five -year period on record. Base water years were selected based on aggregated historical information for all water supply sources and analysis by Sonoma Water.
The City has one source of non -potable water (recycled water). The City has been producing and using recycled water since the 1970s for agricultural use. Urban use of recycled water (for landscape irrigation) began in 2009. The City will use the same base water years for the historical average (“normal”) year, single- dry year, and five consecutive dry year period.
Base years and the total water supply (potable and non-potable) that was available during each water year type are summarized in Table 7-1. Although the City did not begin delivering recycled water to urban customers until 2009, this water supply is available into the future and is included in the three scenarios illustrated in the table below (average year, single-dry year, and five consecutive dry years).
53 State of California Department of Water Resources. Final January 2026. Urban Water Management Plan Guidebook 2025.
City of Santa Rosa 7-14 2025 Urban Water Management Plan June 2026
TABLE 7-1: BASIS OF WATER YEAR DATA (RELIABILITY ASSESSMENT) (DWR 7-1 RETAIL) Year Type Base
Year
Available Supplies if
Year Type Repeats
Check the box if quantification of available
supplies is not compatible with this table and is
provided elsewhere in the UWMP.
Location: [insert location from UWMP]
Quantification of available supplies is provided in this table as either volume only, percent only, or both.
Volume
Available
(AF)
% of Average Supply
Average Year 1999 31,540 100%
Single-Dry Year 1977 22,053
Consecutive Dry Years 1st Year 1987 22,053
Consecutive Dry Years 2nd Year 1988 22,053
Consecutive Dry Years 3rd Year 1989 22,053
Consecutive Dry Years 4th Year 1990 22,053
Consecutive Dry Years 5th Year 1991 22,053
Notes: All supplies reported in this table are based on 2030 projected conditions. Additional supplies are estimated to be available in all year types based on new projects coming online in future years, and due to changing demands. Average year supplies are based on 29,100 AFY contract water entitlement plus 2,300 AFY of groundwater and 140 AFY of recycled water. The remaining dry years are based on the same assumptions for groundwater and recycled water, plus an assumption of contract water supply availability equaling 2030 total potable demands.
7.2.1 Water Service Reliability
This section provides an analysis of the reliability of the City’s water service to its customers over the planning horizon through 2050. This assessment compares projected water demands to total water supply sources for a normal water year, a single-dry water year, and a dry period lasting five consecutive years. The water supply service reliability analysis extends through 2050 in five -year increments and is based on the information provided in Chapters 4 and 6.
In summary, the water service reliability assessment through 2050 found the following:
• Normal Water Years: The City projects having adequate water supplies in normal years to meet demands through 2050.
• Single-Dry Water Years: The City does not project a shortfall in contract water supply from Sonoma Water in a single-dry year that is hydrologically equivalent to the driest water year on record (1977).
Also, the City does not anticipate a shortfall in groundwater supply or recycled water supply.
City of Santa Rosa 7-15 2025 Urban Water Management Plan June 2026
• Dry Five-Year Periods: The City projects having adequate water supplies for dry five-year periods that are hydrologically equivalent to the five driest consecutive years on record (1987-1991) to meet demands through 2050.
7.2.2 Water Service Reliability – Normal Year
Contract Water: As described in Sonoma Water’s 2025 UWMP and summarized in Chapter 6 of this UWMP, Sonoma Water’s model projects being able to provide up to 29,100 AFY per the Restructured Agreement during normal water years through 2050, starting in 2035.
Groundwater: As discussed in Chapter 6, the City projects being able to produce up to 4,100 AFY of groundwater from its potable wells during normal water years through 2050, starting in 2035.
Recycled Water: As discussed in Chapter 6, the City projects being able to provide up to 140 AFY of non - potable water (recycled water) to urban recycled water customers through 2050.
Demands: As discussed in Chapter 4, the City has projected normal water demand through 2050 in five - year increments. These projections are for normal demands, which reflect anticipated water use when the City is not experiencing a water shortage. The projected demands take into account est imated population and employment growth, likely new development, passive water savings from plumbing codes, and climate change.
Assessment: A comparison of future water supplies and projected demands shows that demands will not exceed supplies in normal water supply years through 2050, which is the planning horizon of this UWMP.
Table 7-2 provides a comparison of projected total water supply and demand during normal years. As shown, the City anticipates having adequate water supplies to meet demands through 2050.
TABLE 7-2: NORMAL YEAR SUPPLY AND DEMAND COMPARISON (DWR 7-2 RETAIL) 2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 (AF)
Supply totals
(autofill from Submittal
Table 6-9 R)
31,540 32,340 33,340 33,340 33,340
Use totals
(autofill from Submittal
Table 4-2 R)
19,753 20,061 20,453 20,905 21,403
Surplus/(shortfall) 11,787 12,279 12,887 12,435 11,937
7.2.3 Water Service Reliability – Single-Dry Year
Contract Water: As described in Sonoma Water’s 2025 UWMP, Sonoma Water’s model does not project a supply shortfall of potable water supply during single-dry years. For the purpose of single-dry year supply projections for the City’s 2025 UWMP, Contract Water volume is assumed equal to total projected demands.
City of Santa Rosa 7-16 2025 Urban Water Management Plan June 2026
Groundwater: As discussed in Chapter 6, the City projects that groundwater supply would not be reduced during a single-dry year due to the short duration of a single-dry year and the historically artesian conditions of the City’s Farmers Lane wells. The City projects having 2,300 AFY of potabl e groundwater during single- dry years through 2030, and up to 4,100 AFY through 2045.
Recycled Water: As discussed in Chapter 6, the City projects non -potable (recycled) water supply would not be reduced during single-dry years. The projected demand for recycled water within the City is less than one percent of the total annual recycled water production volume, and urban recycled water customers are given top priority for deliveries. The City projects having 140 AFY of recycled water during single -dry years through 2050.
Demands: As discussed in Chapter 4, the City projected normal water demand through 2050 in five-year increments. These projections reflect anticipated water use when the City is not experiencing a water shortage. The normal demand projections consider estimated population and employment growth, likely new development, and passive water savings from plumbing codes.
Assessment: A comparison of future water supplies and projected demands shows that demands will not exceed supplies through 2050, within the planning horizon of this UWMP.
Table 7-3 provides a comparison of projected total water supply and demand during single dry years. As shown, the City anticipates having adequate water supplies to meet demands through 2050.
TABLE 7-3: SINGLE-DRY YEAR SUPPLY AND DEMAND COMPARISON (DWR TABLE 7-3 RETAIL)
2030
(AF)
2035
(AF)
2040
(AF)
2045
(AF)
2050
(AF)
Supply totals 22,053 23,161 24,553 25,005 25,503
Use totals 19,753 20,061 20,453 20,905 21,403
Surplus/(shortfall) 2,300 3,100 4,100 4,100 4,100
7.2.4 Water Service Reliability – Five Consecutive Dry Years Contract Water: As described in Sonoma Water’s 2025 UWMP, Sonoma Water’s model does not project a supply shortfall of potable water supply during multiple dry years. For the purpose of multiple dry years supply projections for the City’s 2025 UWMP, Contract Water volume is assumed equal to total projected demands.
Groundwater: As discussed in Chapter 6, the City projects that groundwater supply would not be reduced during dry five-year periods. The City reviewed the volumes of groundwater extracted over the past 10 years (2015-2025), including during the recent historic drought (2020-2022). Due to the quantity of groundwater storage available and the City’s observation that its wells have historically quickly returned to artesian conditions each year (even during drought conditions), the City anticipates that groundwater supply will
City of Santa Rosa 7-17 2025 Urban Water Management Plan June 2026
not be reduced by dry five-year periods. The City projects increasing groundwater supply availability with the development of new supplies, as discussed in Chapter 3 and 6.
Recycled Water: As discussed in Chapter 6 of this UWMP, the City projects non -potable (recycled) water supply would not be reduced during dry five-year periods. The City reviewed the volumes supplied to urban recycled water customers over the past 10 years (2015 -2025), including during the recent historic drought (2020-2022). The City considered the fact that urban recycled water customers consume less than one percent of the total recycled water produced and that urban recycled water customers are given high priority for deliveries. The City projects having 140 AFY of recycled water during five dry year periods through 2050.
Demands: As discussed in Chapter 4, the City has projected normal water demand through 2050 in five - year increments. These projections are for normal demands, which reflect anticipated water use when the City is not experiencing a water shortage. The projected demands take into account est imated population and employment growth, likely new development, and passive water savings from plumbing codes.
Assessment: A comparison of future water supplies and projected demands shows that demands will not exceed supplies in dry five-year periods through 2050, which is the planning horizon of this UWMP.
Table 7-4 provides a comparison of projected total water supply and demand during dry five-year periods.
As shown, the City anticipates having adequate water supplies to meet demands through 2050.
TABLE 7-4: MULTIPLE DRY YEARS SUPPLY AND DEMAND COMPARISON (DWR TABLE 7-4 RETAIL)
2030
(AF)
2035
(AF)
2040
(AF)
2045
(AF)
2050
(AF)
First year
Supply totals 22,053 23,161 24,553 25,005 25,503
Use totals 19,753 20,061 20,453 20,905 21,403
Surplus/(shortfall) 2,300 3,100 4,100 4,100 4,100
Second year
Supply totals 22,053 23,161 24,553 25,005 25,503
Use totals 19,753 20,061 20,453 20,905 21,403
Surplus/(shortfall) 2,300 3,100 4,100 4,100 4,100
Third year
Supply totals 22,053 23,161 24,553 25,005 25,503
Use totals 19,753 20,061 20,453 20,905 21,403
Surplus/(shortfall) 2,300 3,100 4,100 4,100 4,100
Fourth year
Supply totals 22,053 23,161 24,553 25,005 25,503
Use totals 19,753 20,061 20,453 20,905 21,403
Surplus/(shortfall) 2,300 3,100 4,100 4,100 4,100
Fifth year
Supply totals 22,053 23,161 24,553 25,005 25,503
Use totals 19,753 20,061 20,453 20,905 21,403
Surplus/(shortfall) 2,300 3,100 4,100 4,100 4,100
City of Santa Rosa 7-18 2025 Urban Water Management Plan June 2026
7.2.5 Water Service Reliability – Management Tools and Options All water consumed by the City comes from local supply sources. No water is imported from other regions, nor does the City anticipate importing water from other regions during the UWMP planning period.
Therefore, the City’s water management tools focus on increasing the reliability of water supplies over time.
For example, by providing funding and staffing to implement the City’s robust water use efficiency programs for over three decades, the City worked with the community to ensure water is used wisely by customers during all water supply conditions. Details about demand management efforts are discussed in Chapter 9.
State regulations and local ordinances have also helped to reduce water use over the past 30 years. Going forward, the City will continue to provide its “WaterSmart” programs to engage customers in helping to manage local water supplies effectively. For any future water shortage scenarios that require additional action during a severe dry period or a catastrophic supply interruption, the City will implement its WSCP summarized in Chapter 8 and detailed in Appendix F.
It is also important to note that Sonoma Water can store 245,000 AF of water in Lake Sonoma and can divert up to 75,000 AFY for water supply purposes under current water rights permits. This means that Lake Sonoma can store approximately three years of nor mal water supply. While supply volumes in Table 7-3 are shown to exactly meet demands in single -dry years when shortages might occur, it is anticipated that additional water would remain in storage in Lake Sonoma to meet future demands. In addition, the City’s groundwater wells would only be pumped as neede d to meet water use, even though the groundwater supply could produce more water.
7.3 Drought Risk Assessment
The Drought Risk Assessment (DRA) is an evaluation of local water supply availability, assuming the next five years (2026 -2030) are hydrologically equivalent to the driest five consecutive years on record. As required by the regulation, this section provides a description of the data and methods used for the DRA, the basis for determining supply shortage conditions, a determination of the reliability of each water supply source, and a comparison of the total water supplies and uses, assuming the next five y ears are hydrologically equivalent to the driest five consecutive years on record.
7.3.1 Data, Methods, and Basis for Water Shortage Condition The City analyzed data and considered trends to assess whether supply shortage conditions are anticipated in one or more years during the upcoming five-year period (2026-2030), assuming this upcoming five years are hydrologically equivalent to the driest five-year period on record. To conduct this assessment, the City relied on the following data sources to develop this DRA:
• Driest five-year period on record for the region, based on historical hydrological information (Source: Sonoma Water 2025 UWMP)
• Historic and current water supplies by source (Sources: City records) • Historic and current water use, including all uses and water losses (Source: City records and annual Water Loss Audits).
• Projected water supply availability for 2026 through 2030 (Source: Sonoma Water 2025 UWMP, City records for groundwater and recycled water)
• Projected water use for 2026-2030 (Sources: EKI report (Appendix D) and Chapter 4 of this UWMP)
City of Santa Rosa 7-19 2025 Urban Water Management Plan June 2026
The City used the following methods in its analysis:
Driest Five-Year Period: To identify the driest five-year period on record, the City relied on the analysis completed by Sonoma Water. Sonoma Water analyzed hydrologic records for the region and determined that the driest five-year period on record as 1987-1991.
Water Use: To estimate water use for 2026-2030, the City used historic and projected water use data. Water use was estimated at “unconstrained” levels. Unconstrained refers to anticipated water use under normal water year conditions when the City is not experiencing a water shortage. To estimate u nconstrained demand for 2026-2030, the City considered historic water use and the projected demand for 2026, which takes into account estimated population and employment growth, likely new development, rebounding demand after the 2020 -2022 drought, passive water savings from plumbing codes, and climate change impacts.54 The anticipated increase in use from 2024 actual use to 2025 projected demand was applied to estimate the demands for 2026, 2027, 2028, and 2029.
Table 7-5 (which includes estimated demands for potable and non -potable water from Table 4-11 and Table 4-12 from Chapter 4) shows the estimated unconstrained water demand for 2026-2030.
TABLE 7-5: ESTIMATED WATER USE FOR 2026-2030, AF
2026
Estimated
2027
Estimate)
2028
Estimated
2029
Estimated
2030
Projected
Potable(a) 17,660 18,148 18,637 19,125 19,613
Non-potable (recycled)(b) 140 140 140 140 140
Total 17,800 18,288 18,777 19,265 19,753
(a) Estimated potable water demand for 2026-2030 was based on interpolating between actual 2025 use and projected 2030 demands from Table 5-4 in Appendix D (EKI report).
(b) Estimated non-potable (recycled water) demand is expected remain at or below 140 AFY.
Water Supplies: To estimate water supplies for 2026-2030, the City considered each water supply separately:
• Contract Water : The City relied on Sonoma Water for its analysis of contract water supplies.
Sonoma Water assessed the availability of its water supply for 2026 -2030 under hydrologic conditions equivalent to the driest five-year period on record (1987-1991). Based on that analysis, Sonoma Water anticipates contract water supply would be less than normal but would not result in a water shortage condition for the City if the 2026 -2030 hydrology is equivalent to the driest five- year period on record. Sonoma Water determined it could provide supplies equal to unconstrained total City demands (less the volume of groundwater and recycled water supplies available) for each of the upcoming five years if a similar drought occurred. • Groundwater: The City assessed groundwater availability for 2026 -2030 under conditions equivalent to the driest five-year period on record. The City reviewed the volumes of groundwater extracted over the most recent 10 years (2016 -2025), which include the recent historic drought (2020-2022). The City considered the fact that its production wells have historically quickly returned
54 EKI report (Appendix D).
City of Santa Rosa 7-20 2025 Urban Water Management Plan June 2026
to artesian conditions quickly, even after full time use over six to seven dry months each year, including during drought conditions. Therefore, the City projects groundwater supply will not be impacted if 2026-2030 is hydrologically equivalent to the driest five-year period. • Recycled Water: As discussed in Chapter 6, the City assessed recycled water availability for 2026 - 2030 under conditions equivalent to the driest five-year period on record. The City reviewed the volumes supplied to urban customers over the past 10 years (2016 -2025), including the recent historic drought (2020-2022). The City considered the fact that urban customers consume less than one percent of the total recycled water produced , that urban recycled water customers are given high priority for deliveries and that urban recycled water supply has not been impacted by drought conditions. Therefore, the City projects recycled water supply will not be i mpacted if 2026-2030 is hydrologically equivalent to the driest five-year period.
7.3.2 DRA Water Source Reliability
As discussed above in Section 7.2.1, the City assessed available water supplies for 2026 -2030, assuming the hydrology will be equivalent to the driest five-year period on record and determined the following:
• Sonoma Water anticipates contract water supply would be less than normal but would not result in a water shortage condition.
• Groundwater supply will not be impacted.
• Recycled water supply will not be impacted.
Table 7-6 (which is Table 6-17 from Chapter 6) shows the estimated water supply by water source for 2026-2030, assuming the hydrology will be equivalent to the driest five-year period on record.
TABLE 7-6: 2026-2030 PROJECTED WATER SUPPLY, ASSUMING DRY CONDITIONS, AF Supply 2026 2027 2028 2029 2030
Purchased Water
(potable) 15,361 15,849 16,337 16,826 17,314
Groundwater (potable) 2,300 2,300 2,300 2,300 2,300
Non-potable (recycled) 140 140 140 140 140
Total 17,801 18,289 18,777 19,266 19,754
7.3.3 Total Water Supply and Use Comparison
This section provides an analysis of the reliability of the City’s water service to its customers should the next five years (2026-2030) be hydrologically equivalent to the driest five-year period on record for the region (1987-1991). This assessment compares estimated water demands to total water supply sources.
The City anticipates having adequate supplies to meet estimated unconstrained demand if 2026 -2030 is hydrologically equivalent to the driest five-year period on record. Table 7-7 provides a comparison of estimated water supplies and unconstrained demands for 2026-2030 under drought conditions
City of Santa Rosa 7-21 2025 Urban Water Management Plan June 2026
TABLE 7-7: FIVE-YEAR DROUGHT RISK ASSESSMENT TABLES TO ADDRESS WATER CODE SECTION 10635(B) (DWR TABLE 7-5 RETAIL)
2026 Total
Total Water Use (AF) 17,800
Total Supplies (AF) 17,801
Surplus/Shortfall w/o WSCP Action 1
2027 Total
Total Water Use (AF) 18,288
Total Supplies (AF) 18,289
Surplus/Shortfall w/o WSCP Action 1
2028 Total
Total Water Use (AF) 18,777
Total Supplies (AF) 18,777
Surplus/Shortfall w/o WSCP Action 0
2029 Total
Total Water Use (AF) 19,265
Total Supplies (AF) 19,266
Surplus/Shortfall w/o WSCP Action 1
2030 Total
Total Water Use (AF) 19,753
Total Supplies (AF) 19,754
Surplus/Shortfall w/o WSCP Action 1
City of Santa Rosa 8-1 2025 Urban Water Management Plan June 2026
8. WATER SHORTAGE AND CONTINGENCY PLANNING
The City has developed a detailed standalone Water Shortage Contingency Plan (WSCP) for responding to water shortage conditions. The full plan has been attached in Appendix F. Here is a concise summary of the key requirements met by the attached WSCP:
• Section 1: Introduction provides an overview of the City’s WSCP. • Section 2: Water Service Reliability Assessment summarizes key elements of the water supply reliability analysis conducted for the City’s 2025 UWMP. [CWC Section 10632(a)(1)] • Section 3: Procedures for Annual Water Supply and Demand Assessment outlines the process that the City will use to conduct assessments each year to determine if shortage exist or are anticipated and provides written decision making steps for any subsequent actions. [CWC Section 10632 (a)(2)]
• Section 4: Standard Water Shortage Stages describes the City’s eight water shortage levels and illustrates how these align with the State’s six standard water shortage levels. [CWC Section 10632 (a)(3)(A)]
• Section 5: Shortage Response Actions describes the shortage response actions that the City will implement for each shortage level and estimates the extent these actions will address the gap between supplies and demands. [CWC Section 10632 (a)(4)] • Section 6: Communication Protocols explains the procedures that the City will use to inform customers, the public, and government entities of any current or predicted water shortages and associated response actions. [CWC Section 10632 (a)(5)]. • Section 7: Compliance and Enforcement details the means that the City will use to ensure compliance and enforcement of triggered shortage response actions and describes appeal and exemption procedures. [CWC Section 10632 (a) (6)]
• Section 8: Legal Authorities describes the legal authorities that will empower implementation of the City’s shortage response actions during water shortage emergencies. [CWC Section 10632 (a)(7) and Division 1, Section 350]
• Section 9: Financial Consequences of Water Shortage Contingency Plan provides a discussion of the potential revenue reductions and expense increases associated with activating shortage response actions and describes the City’s mitigation actions. [CWC Section 10632 (a)(8)] • Section 10: Monitoring and Reporting summarizes how the City will assure appropriate data is collected to monitor customer compliance and to respond to any state reporting requirements. [CWC Section 10632(a)(9)]
• Section 11: Shortage Plan Refinement Procedures describes steps the City will take to assess the functionality of the WSCP and make appropriate adjustments as may be warranted. [CWC Section 10632(a)(10)]
City of Santa Rosa 8-2 2025 Urban Water Management Plan June 2026
• Section 12: Plan Adoption, Submittal, and Availability outlines how the City will adopt, submit, implement, and amend (if necessary) the WSCP, and how the City will make it publicly available. [CWC Section 10632 (a)(c)]
City of Santa Rosa 9-1 2025 Urban Water Management Plan June 2026
9. DEMAND MANAGEMENT MEASURES
This chapter describes the City’s historical and existing demand management measures (DMMs) to promote conservation and reduce water supply demands. It provides information about the status of implementation of DMMs, including a comprehensive description of the City’s historical, current, and projected DMMs.
These measures are integral not only to the City’s long term water supply planning efforts bu t are also central to the effectiveness of the City’s WSCP, which has been summarized in Section 8 and provided in detail in Appendix E. Additionally, a comprehensive analysis of the effectiveness of the City’s key water use efficiency programs can be found in Appendix D (EKI report).
9.1 Water Conservation Program Overview
The City has been and continues to be a leader in implementing innovative water conservation programs.
Water conservation and demand management are an integral part of the City’s water supply strategy. Santa Rosa is committed to integrating water conservation into future supply and demand solutions for both the water system and the wastewater treatment/reuse system.
The City has been implementing water conservation programs since the 1976 -1977 drought. In the early 1990s, the City expanded these efforts by hiring a full-time Water Conservation Coordinator. By 1998, the City had established its first rebate and incentive programs and had hired three full time staff dedicated to water conservation program implementation. Additionally, in 1998 the City became a signatory to the California Urban Water Conservation Council (CUWCC) 55 Memorandum of Understanding Regarding Urban Water Conservation (MOU) dated September 1997. The City continued to expand its demand management and conservation programs to address the requirements of the Best Management Practices identified by the CUWCC. As a result of these efforts, the City was recognized by the Publ ic Officials for Water and Environmental Reform (P.O.W.E.R) 2007 Water Conservation Scorecard as one of only two water retailers in the State of California to successfully complete all 14 of the CUWCC’s Best Management Practices outlined in the 1998 CUWCC MOU, without an exemption. Following the CUWCC’s restructuring in 2018 to become the California Water Efficiency Partnership (CalWEP), a state chapter of the national organization, the Alliance for Water Efficiency (AWE), Best Management Practices are no l onger required. However, the City still implements a suite of DMMs and conservation programs and intends to expand these per new state conservation regulations which became effective in January 2025.
Since the early 1990s, the City has spent approximately $30 million on its water conservation programs, including replacement of approximately 58,000 toilets with ultra low-flow and high efficiency toilets and conversion of over 4.3 million square feet of high water use turf grass to low water use landscaping.
Additionally, the City implements innovative programs such as the rainwater harvesting rebate program, graywater reuse rebate program, and sustained reduction rebate programs.
To encourage water conservation, the City established a conservation-oriented water rate structure in 2007.
This water rate structure is designed to derive the majority of water sales revenue from volumetric, as opposed to fixed, charges. On average, from 2021 to 2025 the City received approximately 72 percent of potable water sales revenue from volumetric charges and 28 percent from fixed charges. The City set a tiered water rate structure for Single Family Residential customers and a water budget -based tiered water
55 CUWCC changed its name California Water Efficiency Partnership (CalWEP) in 2018.
City of Santa Rosa 9-2 2025 Urban Water Management Plan June 2026
rate structure for Dedicated Irrigation customers that targets outdoor water use. The Dedicated Irrigation rate structure is based on landscape measurements for each customer’s site and real -time evapotranspiration data from the City’s CIMIS stations.
For 30 years, the City has offered a suite of technical support, education, information, rebates, and incentives to Single Family Residential, Multi-Family Residential, CII, and Dedicated Irrigation customers. As a result of the City’s programs and state and local requirements, the City’s per capita demand for potable water has decreased 50 percent over the past 35 years, decreasing from 177 GPCD in 1990 to 88 GPCD in 2025. Total water use went down 24 percent, decreasing from 22,494 AF in 1990 down to 17,172 AF in 2025, despite an increase in population of 54 percent.
The cumulative annual water savings from 2010 -2024 attributed to the City’s water use efficiency efforts implemented during that time period is estimated to be 12,300 AF. This does not include passive water savings due to plumbing code (see Section 4.5). These savings were estimated using a combination of national water use averages by device and appliance type based on the best available research, combined with some locally-specific estimated program water savings. Santa Rosa participated in a 2025 study on the water savings of the City’s Green Exchange program (as a follow -up to a previous 2020 iteration of the study) and the indoor and outdoor water use efficiency survey program. This research (see Appendix D for the full report) provided Santa Rosa with the actual water savings for those programs from program participants and is a more accurate way of calculating water savings for these programs as compared to using national averages.
9.2 Demand Management Measures
The City implements a wide range of DMMs to promote conservation and reduce water supply demands.
The various categories of DMMs are described in the subsections below, including implementation of the City’s water waste ordinance, metering of all water connections, conservation pricing, public outreach and education, programs to assess and control di stribution system water loss, water conservation program coordination and staffing, and a suite of free services, rebates, and incentives.
At the end of each program description, the narrative provides a description of the nature (e.g., type of rebate and amount) and extent (e.g., number of customers who participated) of the DMMs implemented by the City from 2021 through 2025. Over the course of this five‑year period, staff conducted more than 1,790 indoor and/or outdoor water use surveys for residential and CII customers, and the City provided more than $1.1 million in rebates to over 1,129 residential and CII customers
9.2.1 Water Waste Prevention Ordinance
The City adopted Water Waste Ordinance No. 3426 (Ordinance) in May 1999. The Ordinance prohibits waste of water due to breaks or leaks in the water delivery system or water use in the outdoor areas resulting in runoff.56 The Ordinance gives the City the authority to discontinue service, or fine the customer if the water waste is not corrected.
56 The City’s Water Waste Ordinance also requires all new water services to be equipped with recycling or reuse systems for evaporative cooling systems, decorative water fountains, conveyer car washes, and industrial clothes washers
City of Santa Rosa 9-3 2025 Urban Water Management Plan June 2026
The City has developed a process to address violations of the Ordinance. All reported water waste violations receive prompt response from City staff. If water waste is verified by staff, the customer is informed of the water waste ordinance requirements an d corrective action timeline, offered free technical assistance, and provided information on water use efficiency (WUE) incentive programs. If corrective action is not implemented within the identified time frame, a formal notice of violation is mailed to the customer specifying actions that must be taken within a particular time frame. Failure to comply can lead to the City discontinuing water service, and/or fining the customer. As needed, the City also implements a water waste patrol to identify and notify customers of violations of the Ordinance.
Implementation Over the Last 5 Years: Figure 9-1 shows the number of water waste reports for 2021 through 2025. Since 2021, 2,280 reports have been received by the WUE Program, resulting in over 2,821 follow-ups and 1,161 written warnings and further contacts. During this time, 14 water shutoffs were required. In 2020, the City began utilizing AMI data to identify sites with continuous water use. Through a review of usage data, staff identify connections that have continuous use and flag them for follow up. WUE Program staff then reach out to these custom ers and inform them of their continuous use data (and that it might be indicative of a leak); this has led to a marked increase in the number of water waste cases investigated and resolved beginning in 2020 and continuing to the present.
FIGURE 9-1: WATER WASTE CASES 2021-2025
City of Santa Rosa 9-4 2025 Urban Water Management Plan June 2026
9.2.2 Metering
The City’s service area is fully metered. All existing water connections are metered, and all new connections are required to be metered. The City obtains meter reads electronically or manually as needed, and issues water bills to customers monthly. The City maintains an asset management database that contains detailed information on all meters in the City’s system, including meter size, type, year installed, customer class served, and maintenance performed.
Implementation Over the Last 5-10 Years: In 2016, the City began converting meters to AMI technology. The City completed the full AMI conversion in 2021. AMI meters allow the City to remotely read meters, which speeds meter reading, decreases field safety concerns, and enhances customer service. An online customer data portal deemed the WaterSmart Portal was launched in 2021 to further enhance the City’s customer service by providing customers with access to their own water use data in near -real time. In Au gust 2024, the City began issuing automated leak detection notifications via the WaterSmart Portal for accounts with suspected leaks exceeding a designated threshold over 24 hours, with a supplemental notice sent to the email address associated with the account. In addition, staff access to AMI hourly data greatly assists water use efficiency efforts by providing a detailed profile of water use to help staff inform and educate customers about their current water use, seasonal patterns, and any continuous use.
9.2.3 Conservation Pricing
The City established a conservation-oriented water rate structure in 2007 to encourage water conservation implementation. The City implements an increasing block, tiered water rate structure for Single Family Residential customers and an increasing block, water budget based tiered water rate structure for Dedicated Irrigation connections (for urban landscape irrigation). The Dedicated Irrigation water rate structure is based on individual landscape measurements and real time evapotranspiration data from the City’s CIMIS stations.
The City’s sewer charges are based on metered water use during winter months, when all water use is presumed to be indoor use.
The water rate structure is designed to derive the majority of water sales revenue from volumetric charges.
Customers are billed on metered water use monthly. Because water rates are tiered and sewer fees are based on metered water use during winter months, customers can reduce their water and sewer bills by reducing their water use.
Implementation Over the Last 5 Years: The conservation-oriented rate structure has been in place since 2007.
The City’s current rate structure is available at www.srcity.org/817/Rates-Fees.
9.2.4 Public Education and Outreach
The City maintains four water use efficiency information distribution centers in City facilities, provides water use efficiency bill inserts in both English and Spanish, sends a WUE Program Welcome postcard to all new accounts informing them of the City’s WUE Programs, participates in the annual Fix -A-Leak Week, and engages the public with information tables at community events to promote using water wisely. The City also provides information through its website, provides speakers to organizations, hosts se veral technical workshops for customers annually, and supports the statewide Water Awareness Month campaign each May with a variety of activities. In addition, the City has an active social media presence on Facebook, X (formerly Twitter), and NextDoor whe re water use efficiency outreach is posted in English and Spanish.
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Additionally, digital and print ads, water bill inserts, the Santa Rosa’s City Connections e -newsletter and radio ads are used to reach customers.
In 2010, the Sonoma Marin Saving Water Partnership (SMSWP) was established to work collaboratively on water conservation and efficiency implementation, including water conservation outreach and education.
SMSWP consists of the cities of Santa Rosa, Rohnert Park, Sonoma, Cotati, Petaluma, Healdsburg, Cloverdale and the Town of Windsor, as well as California American Water, North Marin Water District, Marin Municipal Water District, Valley of the Moon Water District, and Sonoma Water. SMSWP provides regional media campaigns related to water conservation and water use efficiency, including digital and print newspaper ads and radio ads, Facebook posts, before the movie ads, a dedicated website, and local cable channel videos. For eight consecutive years (2017 -2024), the SMSWP won the WaterSense Sustained Excellence Award from the United States Environmental Protection Agency (EPA) for developing and growing the Qualified Water Efficient Landscaper (QWEL) program. (Awards were not presented in 2025 due to a federal government shutdown. QWEL is a 21 -hour nationwide training program that teaches landscape professionals about outdoor water use efficiency and offers certification in sustainable landscape practices.
The City’s water wholesaler, Sonoma Water, implements a regional water education program on behalf of its retail water agencies. Sonoma Water’s Water and Energy Education Program is designed to help educators teach students the “value” of water as an important natural resource, watershed stewardship, and how water and energy are linked. The program includes classroom instructional presentations; field study opportunities; Project WET (Water Education for Teachers) teacher trainings and workshops; free curriculum materials aligned with the California Next Generation Science Standard; a lending library of videos, interactive models, and printed materials; and endorsement, participation, and financial sponsorship of events, assemblies, and workshops. During the COVID-19 public health emergency and resultant County of Sonoma Public Health Order restricting in -person education opportunities, Sonoma Water developed free distance learning materials, including videos, activity sheets, and learning games for teachers of kindergarten through twelfth grade. All programs and materials are free to teachers in the Sonoma Water service area, including the City of Santa Rosa.
To supplement the Sonoma Water education program, the City also provides classroom presentations to educate students about where our water comes from, water conservation, and water quality through the City’s Take it From the TAP! Program. The City also offers tours of the Laguna Wastewater Treatment Plant, incorporating information on water conservation and recycled water production and use.
Implementation Over the Last 5 Years: About six times each year from 2021 through 2025, the City distributed bill inserts to inform approximately 54,000 customers about water use efficiency rebates, incentives, free services and fixtures, classes, and events. On average, the WUE Team offered five workshops per year on subjects such as water efficient landscapes, graywater reuse, and rainwater harvesting.
From January 2021 through June 2025, the City reached thousands of customers by staffing information booths at the City’s annual WaterSmart Expo, Wednesday Night Markets, Eco-Friendly Garden Tour, County Fair, local Home Show, the City’s St. Patrick’s Day 5K Run, Earth Day Festival, Cinco de Mayo Celebration, Día de los Niños, and Cesar Chavez Day. Additionally, the City provided Take it From the TAP! water education presentations to students from January 2021 through June 2025, reaching approximately 12,055 students in 38 schools (grades K12).
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9.2.5 Programs to Assess and Manage Distribution System Real Loss The City uses the AWWA Standard Water Audit and Water Balance M36 Publication and companion free Water Audit Software to determine and analyze system water losses. Water losses include “real losses” and “apparent losses”. Real loss is defined by the State as the physical loss of water from water distribution systems. Apparent loss is defined as revenue losses due to meter inaccuracies, billing errors or unauthorized consumption.
In 2015 and 2016, a multidisciplinary team of City staff participated in the State sponsored Water Loss Technical Assistance Program to receive training and guidance to enhance their skills for conducting valid water loss audits. The team then performed extensive interviews of City staff and evaluations of systems to better understand existing procedures for collecting, entering, and managing data and for operating, repairing, and maintaining the distribution system. The audit team has been refining and imp roving data collection and data grading processes every year. The most significant step the City took to increase data validity is upgrading water meters, registers, and meter transceiver units to AMI technology.
As set forth in California Assembly Bill 1668 and Senate Bills 606 and 555, the SWRCB has adopted rules requiring urban retail water suppliers to meet volumetric performance standards for water losses. The City’s performance standard target is 17.1 gallons per service connection per day. 57 The City’s average real loss for 2020-2024 is 13.4 gallons per service connection per day, which is well below the performance standard.
Based on these results, the City is currently in compliance with the anticipated volumetric performance standard and expects to maintain compliance through 2027 and beyond.
The City implements multiple programs to monitor and reduce water loss. All water entering the City’s distribution system from Sonoma Water and from City -operated supply wells is metered, as is all water delivered to customers, including construction water and water sold from the municipal yard. City field crew trucks are also equipped with portable meters to track usage during routine maintenance activities, ensuring accurate accounting of operational water use. To maintain system integrity, hydrants are exercised regularly to keep valves functioning properly and hydrant pressure measurements are conducted several times each year to monitor system performance.
In addition, the City’s field crews conduct a comprehensive proactive leak detection and repair program.
Field crews use a combination of acoustic listening devices and a leak detection correlator to systematically complete a survey of the City’s distribution system to identify undetected leaks (walking routes and listening to accessible points of the system, i.e., curb stops, valves, hydrants, etc.). System leaks discovered by staff and reported by the public are repaired promptly. The City maintains a database that records the date, time, and location of the leak, as well as the repair information and estimated amount of water lost due to the leak. The City is currently finalizing implementation of a GIS -enabled asset management software system (CityWorks) to enhance data collection and analysis capacity, including data related to leak repair. As a preventative measure, the City implements a proactive service replacement program for plastic services and certain copper services where the City has identified areas of high potential leaks from services.
Implementation Over the Last 5 Years: Described in narrative above.
57 State Water Resources Control Board, Individual System Water Loss Standards, August 7, 2025 (accessed online on 9 -8-2025) www.waterboards.ca.gov
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9.2.6 Water Conservation Program Coordination and Staffing Support Since January 1991, the City has had a full time WUE Program Coordinator overseeing the implementation of the City’s water conservation and efficiency programs. In addition to the Coordinator, the City’s WUE Team currently includes five full time -equivalent positions for water conservation programs, including two WUE Representatives, two WUE Technicians, and three part-time WUE interns.
Implementation Over the Last 5 Years: From 2021 to 2025, the annual budget averaged $1.5 million for staff and DMM programs.
9.2.7 Other Demand Management Measures
9.2.7.1 Ordinances and Laws
In addition to the DMMs discussed above, the City has adopted ordinances to require efficient water use in new development:
• In 1991, the City adopted an efficient plumbing fixture ordinance, Ordinance No. 2889, mandating the installation of low -flow faucet aerators and showerheads and ultra low -flow toilets (ULFTs) at all new and existing properties within the City.
• In 1992, the City adopted a Water Efficient Landscape Policy in response to Assembly Bill 325 (1991), requiring the installation of water efficient landscaping for all new development construction, excluding Single Family Residential.
• In 2007, the City adopted its 2007 Water Efficient Landscape Policy and the Single Family Residential Landscape Policy.
• In 2009, the City adopted its Water Efficient Landscape Ordinance (WELO), in response to AB 1881, incorporating and superseding the City’s previously adopted 2007 policies. • In 2015 the City revised its 2009 WELO to comply with the State’s new Model Water Efficient Landscape Ordinance.
• In 2010, the City adopted the CALGreen Building Code Requirements, requiring high efficiency plumbing fixtures for all new construction and renovations of residential and CII properties. The City has also adopted all subsequent CALGreen Building Code Requirements.
More recently, the California state legislature passed two new laws that direct urban retail water suppliers to achieve water use efficiency standards, employ a suite of BMPs, and prohibit certain potable water use.
These laws are as follows:
9.2.7.1.1 Non-Functional Turf (irrigation ban)
In October of 2023, the California legislature passed Assembly Bill 1572 which prohibits using potable water to irrigate non-functional turf (NFT) on CII accounts, including Homeowners’ Associations (HOAs). The law also requires public water agencies to up date policies to reflect the terms of the regulation no later than January 1, 2027. In 2025, the City began the process of updating city code to address the irrigation ban and to include enforcement measures, with anticipated adoption in 2026. Concurrently , the City is partnering
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with CalWEP and other stakeholders across the state to develop education and outreach materials for various water account types impacted by the rule.
9.2.7.1.2 Conservation Regulation
On January 1, 2025, the Making Conservation a California Way of Life regulation (Conservation Regulation) went into effect for all urban retail water suppliers in the state. In addition to meeting an annual Urban Water Use Objective based on service area conditions, the regulation requires the City to adopt a number of Performance Measures and conservation BMPs. Performance Measures affect CII accounts and require those with large areas of irrigated landscapes meeting or exceeding a half -acre in size to eit her install dedicated irrigation meters or employ in-lieu technologies coupled with BMPs no later than 2039. Further, the City is required to employ a specific number of programs and other BMPs for the top 2.5 percent and 20 percent of CII water users. It is the City’s intent to utilize existing DMMs and develop new customer offerings, as needed, to comply with implementation deadlines.
9.2.7.2 Programs
The City’s WUE Program team delivers a wide range of free services, rebates, and incentives to help customers use water wisely. These efforts are described in more detail in the bolded subsections below.
9.2.7.2.1 Indoor Water Use Efficiency Survey
In 2004, the City began providing free water use efficiency surveys to all residential customers. The water use surveys are conducted by WUE Program staff and include checking for interior and exterior property leaks, inspecting toilets, shower heads, and faucets for flow rate and efficiency, and distributing free high efficiency showerheads and faucet aerators as needed. The City also provides free water use surveys for CII customers; audits include a review of water uses, plumbing fixtures, processes, coo ling water systems, and provides site specific recommendations for efficiency improvements.
Implementation Over the Last 5 Years: Staff completed indoor WaterSmart Checkups for 1,538 residences (1,492 Single‑Family residences and 46 Multi‑Family units) and 159 businesses from 2021 through 2025.
In‑person Indoor WUE WaterSmart Checkup also provides recommendations for improving irrigation efficiency, which is detailed in the Landscape Water Use Checkup section below. Customers are provided with a report of findings, and water use efficiency recommendations at the end of the Checkup.
9.2.7.2.2 WaterSmart Home Kit program
In 2020, the City launched this program which provides a kit containing all the materials needed for customers to perform a do‑it‑yourself survey at their own house with follow‑up by WUE Program staff.
Originally, the kit enabled the City to continue to pr ovide surveys during the COVID‑19 health emergency, but the program has continued to be implemented through present.
Implementation Over the Last 5 Years: 1,700 kits were distributed from 2021-2025.
9.2.7.2.3 Landscape Water Use Efficiency Survey
In addition to the Indoor Water Use Efficiency Survey described above, staff conduct Landscape WUE Surveys as well. Staff develop site specific recommendations for improving the efficiency of landscape water
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use by testing irrigation systems for efficiency and recommending irrigation system repairs and improvements. By participating in this program, customers can also pre -qualify to participate in other landscape incentive programs, such as the Green Exchange Program described below. For customers with Dedicated Irrigation accounts, technical staff will check irrigation systems for leaks and for efficiency, recommend irrigation system repairs and improvements, develop irrigation schedules based on landscape measurements and ETo data, and analyze potential water and financial savings from implementing efficiency upgrades.
Implementation Over the Last 5 Years: Staff completed landscape water use efficiency surveys for approximately 633 residential customers and 131 dedicated landscape irrigation meter sites from 2021 through 2025. Many customers participate in both an indoor and landscape water use efficiency Ch eckup at the same appointment; therefore, the total number of indoor and landscape Checkups may be greater than the number of actual customer site visits.
9.2.7.2.4 Sustained Reduction Rebate
The City’s Sustained Reduction Rebate program began in 1996, initially for CII customers exclusively and was later expanded to include residential customers. This incentive encourages innovative approaches to reducing water use, such as through the adoption of new technologies and/or process water system design, that might not be covered under other existing rebate programs offered by the City. The City offers $400 for every 1,000 gallons per month of sustained water savings.
Implementation Over the Last 5 Years: From 2021 through 2025, two residential, one Multi -Family Residential, and one CII sites achieved sustained reductions, collectively reducing their demand by more than 20,500 gallons per month.
9.2.7.2.5 High Efficiency Clothes Washer Rebate
The City offers a rebate to Single Family and Multi -Family Residential customers who replace clothes washers with more efficient models. The program began in 1998, initially through a regional program administered by Sonoma Water. The City began administering its own residential program in 2004. Since 2000, the City has also offered a rebate program for the replacement of commercial washing machines with the highest efficiency commercial washing machines available. The City offers a rebate of $50 for residential washing machines. Commercial washing machines are eligible for a rebate of $350.
Implementation Over the Last 5 Years: A total of 175 residential were replaced under this program from 2021 through 2025.
9.2.7.2.6 Recirculating Hot Water Pump Rebate
From September 2014 to September 2023, the City offered a rebate for recirculating hot water pumps for Single Family residences. With a push of a button, the device pumps cold water sitting in the hot water pipe back to the water heater through the cold wa ter pipe. When the hot water pipe has been refilled with hot water, the pump stops operating, and the end user has access to hot water without having wasted any cold water. This rebate was discontinued in 2023.
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Implementation Over the Last 5 Years: 34 Single‑Family Residential customers have taken advantage of the rebate, which increased from $100 to $250 in 2022, for installing a recirculating hot water pump from 2021 through 2023 when the program was discontinued.
9.2.7.2.7 Rainwater Harvesting Rebate
In 2009, the City developed and implemented a Rainwater Harvesting Rebate program. Rainwater harvesting is the capture, storage and use of rainwater on site. Rainwater systems range from simple catchment devices, such as rain barrels, to more complex syste ms such as cisterns and storage tanks. The City provides a rebate for storage, limited to the amount of storage needed to meet the estimated peak month water use needs for the landscape.
Implementation Over the Last 5 Years: From 2021 through 2025, City customers have received rebates of $0.25 to $1.00 per gallon of storage for rainwater harvesting systems. Note, between 2022 to 2023, the rebate was increased from $0.50 to $1.00 per gallon of storage through a grant funded by DWR. Collectively, customers installed over 92,140 gallons of rainwater storage from 2021 to 2025.
9.2.7.2.8 Graywater Reuse Rebate
In 2010, the City developed a Graywater Reuse Rebate to encourage the installation of graywater systems in compliance with new building codes. Graywater is wastewater collected from showers, bathtubs, bathroom sinks, and clothes washing machines that is reused on site instead of going into the sewer system.
Graywater does not include water from toilets, kitchen sinks, or dishwashers. The City provides a few options for the Graywater Reuse Rebate Program, including a $100 rebate for single‑fixture graywater systems ($75 prior to February 1, 2021) or a sustained reduction rebate of $400 for every 1,000 gallons per month of sustained water saving (the sustained reduction option would typically be used for multi‑fixture, engineered systems that require a permit).
Implementation Over the Last 5 Years: Ten customers participated in the Graywater Rebate program or received free graywater kits to create their own system at home from 2021 through 2025.
9.2.7.2.9 High Efficiency Urinal Rebate
In 2009, the City began offering a High-Efficiency Urinal Rebate Program to CII customers. The City provides a rebate of up to $450 per urinal with a qualifying high‑efficiency urinal that uses one pint of water per flush or less.
Implementation Over the Last 5 Years: Ten urinals were rebated from 2021 through 2025.
9.2.7.2.10 Green Exchange Program
In 2007, the City began offering rebates and financial incentives for reducing landscape water use and improving landscape water use efficiency at residential and CII sites. The Green Exchange Program provides rebates for replacing high water use landscaping with low water use alternatives and for qualifying irrigation system upgrades. For Single Family residences, the City provides a rebate for replacing up to 1,000 square feet of high water use turf grass with low water use alternatives. This increases to up to 10,000 square feet at Multi-Family Residential and CII sites. The City also provides a rebate for qualifying irrigation equipment and hardware upgrades.
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As of July 2020, the City pays $0.75 per square foot of high water use turf grass replaced with low water use alternatives (up to 1,000 square feet total for Single‑Family residences and up to 10,000 square feet annually for Multi‑Family and CII sites). In response to the severity of drought conditions, the incentive increased from its previous value of $0.50 per square foot to $1.00 per square foot in August 2014 and returned to $0.50 per square foot in June 2016. The rebate was increased to $0.75 per squa re foot in July 2020 to increase program participation. The City also provides a rebate for upgrading irrigation equipment (up to $100 for Single‑Family residences and up to $1,000 for Multi‑Family complexes and CII sites).
Implementation Over the Last 5 Years: From 2021 through 2025, a total of 593 customers (482 Single‑Family residences and 111 Multi‑Family complexes and CII sites) participated in this “Cash for Grass” program, collectively replacing more than 774,000 square feet of high water use turf grass w ith low water use alternatives. A total of 98 sites (76 residential and 22 Multi‑Family and CII sites) received rebates for installing qualifying upgrades to their irrigation systems from 2021 through 2025.
9.2.7.2.11 Water Budgets
In 2007, the City implemented a water budget based tiered water rate structure for Dedicated Irrigation customers based on real time evapotranspiration data from the City’s CIMIS station and square footage of irrigated plant type on the site. Customers receive information about their water budgets on their monthly water bill and are charged for water use based on how efficiently they water compared to their billing period water budget.
Implementation Over the Last 5 Years: The City has 1,747 Dedicated Irrigation customers, all of which are involved with this program.
9.2.7.2.12 Service Split Incentive
The City has required new CII developments to install Dedicated Irrigation services since the 1980s. Because of this, the City has a limited number of CII accounts with “mixed use meters” that serve both indoor and outdoor water use on one meter. Approximately 10 percent of the City’s CII accounts have mixed use meters.
To encourage the retrofitting of mixed use connections to Dedicated Irrigation connections, the City developed and now implements a Service Split Incentive Program. The Service Split Incenti ve Program provides financial incentives to offset the material and permitting cost of retrofitting mixed use services with a Dedicated Irrigation service and a domestic service.
Implementation Over the Last 5 Years: There has been no participation in the service split incentive, likely due to the small number of CII accounts with mixed-use meters.
9.2.7.2.13 Efficient Fixtures Direct Install Program (EFDI) In 2023, the City was awarded $1.5 million dollars from DWR to install ultra-high efficiency toilets (0.8 gallons per flush) and where feasible, low -flow faucet aerators and showerheads at commercial and residential accounts at no cost to the customer. The EFDI program will run until June 2026. In addition, in 2024, the City, under a sub -awardee grant agreement, launched a second EFDI program for resid ential customers with funding from the U.S. Bureau of Reclamation. This second EFDI program provides an add itional $1.8 million in funding (under 55/45 percent match/reimbursement terms), for installation of the same ultra - high efficiency toilet and low-flow fixtures as the DWR-funded EFDI program through September 2026.
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Previously, between 2016 and 2017, through a $2.5 million grant from DWR, the City replaced over 6,400 toilets (1.6 gallons per flush or more) with ultrahigh efficiency toilets (0.8 gallons per flush) in Single Family residences and Multi-Family complexes.
Implementation Over the Last 5 Years: From 2023-2025, 3,400 accounts have participated in the original grant. Both programs collectively are estimated to contribute to the installation of over 4,000 ultra -high efficient toilets across the City’s service area.
9.3 Implementation to Achieve Water Use Targets
In November 2009, SB X7 -7 was signed into law as part of a comprehensive water legislation package.
Known as the 2009 Water Conservation Act, this regulation set a goal of achieving a 20 percent statewide reduction in urban per capita water use by the year 2020. The State directed urban retail water suppliers to establish an interim per capita water use target to be met by 2015 and a final per capita water use target to be met by 2020.
In the City’s 2015 UWMP, the City identified its 2015 interim target as 136 GPCD and its 2020 final target as 126 GPCD. These targets, and the data and methodology used to calculate them, were included in the City’s 2015 UWMP and discussed in Section 5 and Appendix G of the previous 2020 UWMP.
By implementing the DMMs as described in Section 9 of the previous 2015 and 2020 UWMPs and the DMMs described in this UWMP in Section 9.2 and Section 9.3 above, the City achieved the interim and final targets. The City’s actual per capita use was 85 GPCD in 2015, 99 GPCD in 2020, and 88 GPCD in 2025.
Chapter 5 of the previous 2020 UWMP includes a detailed analysis demonstrating the City’s compliance with SB X7-7. 5 of this 2025 UWMP has a brief summary of this regulation.
9.4 Water Use Objective
The Making Conservation a California Way of Life regulation (Conservation Regulation) became effective January 1, 2025, and establishes a new framework for urban retail water suppliers (suppliers) to manage their water use. The Conservation Regulation requires that suppliers annually calculate and compl y with an urban water use objective (Objective). The Objective is calculated using water efficiency standards and unique climatic and demographic factors that reflect the previous year’s conditions. The Objec tive will become more conservative through 2040, as the efficiency standards are reduced for both indoor and outdoor water usage. In addition, the Conservation Regulations require that suppliers implement various CII performance measures and submit an annu al report to demonstrate compliance and progress to the State Water Resources Control Board (State Board). During the second reporting period to the State Board, fiscal year 2024/2025, the City’s water usage was 33 percent below the calculated Objective.
Over the next five years (2026-2031), the City will continue to implement the suite of the DMMs discussed in Section 9.2 and Section 9.3 and seek grant funding, as feasible, to enhance customer programs and services geared at water use efficiency. In addition, the City will continue to proactively engage customers whose AMI data indicates continuous use. These actions are intended to allow the City to remain well below the Objective over the next five years and beyond.
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9.5 Member Of The California Water Efficiency Partnership (Formerly C alifornia Urban Water Conservation Council)
In 1991, DWR along with water utilities, environmental organizations, and other interested groups formulated an MOU regarding urban water conservation in California to implement BMPs and make a cooperative effort to reduce the consumption of California’s w ater resources. At that time, the CUWCC administered this contract. The MOU was amended in 1999.
The City signed the MOU in 1998, pledging to implement cost effective BMPs and conservation programs.
By becoming a signatory, the City committed itself to abide by the BMPs and report progress on quantifiable measures at least every two years. Additionall y, the City has served on the CalWEP Board of Directors for many years.
After the State adoption of new water conservation regulations in 2018, the CUWCC restructured as an organization and changed its name to the California Water Efficiency Partnership (CalWEP). Although the original BMPs are no longer required by CalWEP, Cal WEP continues to play an important role in statewide water use efficiency. CalWEP provides tools, resources, information, and networking opportunities to water providers to implement, evaluate, and track water use efficiency efforts. The organization also tracks and influences water use efficiency legislation. The City is an active member of CalWEP and its national parent organization, the Alliance for Water Efficiency.
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10. PLAN ADOPTION AND SUBMITTAL IMPLEMENTATION
This chapter provides information regarding the notification, public hearing, adoption, and submittal of the City’s 2025 UWMP. It also includes discussion on plan implementation and the process of amending the UWMP.
This UWMP will be the source document for any Senate Bill 610 Water Supply Assessments or Senate Bill 221 Water Supply Verifications required for any proposed projects between 2026 and 2030 that are subject to the CEQA and would demand an amount of water e quivalent or greater than the amount of water required by a 500 dwelling unit project. This UWMP will also be the source document for water demand projections and water supply availability should there be an update by year 2030 to the City’s 2020 Water Master Plan, which was last updated in February 2022. Lastly, this UWMP will provide guidance and direction on development of new local supplies and implementation of water conservation programs and recycled water expansion to meet the requirements of the WC Act.
10.1 Plan Completion Timeline
As indicated in Section 2 of this plan, the City uses a calendar year for water supply and demand accounting. The 2025 UWMP cannot be completed before the end of the calendar year 2025 because current year information is required by Water Code.
10.2 Notice Of Public Hearing
In accordance with the UWMP Act, the City must provide an opportunity for the public to provide input on this 2025 UWMP. The City must consider all public input prior to its adoption. There are two audiences to be notified for the public hearing: cities and counties, and the public.
10.2.1 Notice to Cities and Counties
Per California Water Code Section 10621, notice regarding the plan preparation was sent to the County of Sonoma more than 60 days prior to the public hearing date as noted in Table 10-1. A similar 60-day notice was also sent to neighboring cities, Sonoma Water, and the Santa Rosa Regional Water Reuse System. All notices to the cities and county were sent on January 21, 2026.
The City coordinated the preparation of its UWMP internally, with Sonoma Water, the agencies participating in the Regional Alliance for SB X7-7 compliance and the Santa Rosa Plain Groundwater Sustainability Agency. The notices of preparation are included as Appendix B. Upon substantial completion of this 2025 UWMP, the City provided the same agencies, including internally within the City and Sonoma County, notice of public hearing (Appendix B).
Notifications to cities and counties, in accordance with the UWMP Act, are summarized in Table 10-1. In addition, the City notified and coordinated with Marin Municipal Water District, North Marin Water District, and Valley of the Moon Water District.
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TABLE 10-1: NOTIFICATION TO CITIES AND COUNTIES (DWR TABLE 10-1) City Name 60 Day Notice Notice of Public
Hearing
City of Cotati Yes Yes
City of Petaluma Yes Yes
City of Rohnert Park Yes Yes
City of Sebastopol Yes Yes
City of Sonoma Yes Yes
Town of Windsor Yes Yes
County Name 60 Day Notice Notice of Public
Hearing
Sonoma County Yes Yes
10.2.2 Notice to the Public
To encourage community and public input on the development of the 2025 UWMP, the City included information about the preparation of 2025 UWMP and how to participate through an insert in the utility bills in February 2026, held a public meeting of the City’s Water Conservation Subcommittee of the Board of Public Utilities in February 2026, and held a study briefing on the 2025 UWMP at a Board of Public Utilities meeting in March 2026 and a meeting of the Santa Rosa City Council in June 2026. The City also developed a dedicated webpage providing updates and information related to development of the 2025 UWMP: www.srcity.org/UWMP.
Following completion of the Draft UWMP, a notification of public hearing was placed in the local newspaper (The Press Democrat) about the 2025 UWMP update process. An electronic version of the document was made available on the City’s website, www.srcity.org/UWMP.
During the public review period, local cities and Sonoma County, as well as the general public, were encouraged to comment on the draft document. Noticing for the public hearing was conducted pursuant to Section 6066 of the Government Code. Public hearing notifications were published in The Press Democrat. Copies of the published Notice of Public Hearing are included in Appendix B. In addition, the City notified Marin Municipal Water District, North Marin Water District, and Valley of the Moon Water District
City of Santa Rosa 10-3 2025 Urban Water Management Plan June 2026
10.3 Public Hearing And Adoption
A public hearing to discuss the Draft UWMP (along with the Draft Shortage Plan) was held on June 2, 2026 (TO BE CONFIRMED), in conjunction with the City Council meeting.
The public hearings provided an opportunity for all City water users and the general public to become familiar with the UWMP, provide comments, and ask questions about its water supply in addition to the City’s continuing plans for providing a reliable, sa fe, high quality water supply. Copies of the draft UWMP were made available for public inspection at the Santa Rosa City Manager’s office and at the Santa Rosa Municipal Services Center South Building.
This 2025 UWMP and the 2025 Water Shortage Contingency Plan were adopted by the City Council on June 2, 2026 (TO BE CONFIRMED). A copy of the adopted resolution is provided in Appendix A.
10.4 Plan Submittal
The adopted 2025 UWMP and 2025 Shortage Plan will be submitted electronically to DWR using the WUE data submittal tool within 30 days of adoption, prior to July 1, 2026. A CD or hardcopy of the adopted 2025 UWMP and 2025 Shortage Plan will also be submitted to the California State Library.
No later than 30 days after adoption, a copy of the adopted 2025 UWMP, including the Water Shortage Contingency Plan, will be provided to the cities and counties to which the City provides water.
10.5 Public Availability
No later than 30 days after submittal to DWR, an electronic copy of this UWMP, including the adopted Water Shortage Contingency Plan, will be available to the public online on the City’s website, www.srcity.org/UWMP.
10.6 Amending An Adopted UWMP Or Water Shortage Contingency Plan The City may amend its 2025 UWMP and its 2025 Shortage Plan jointly or separately. If the City amends one or both documents, the City will follow the notification, public hearing, adoption, and submittal process described in Sections 10.2 through 10.4 above. In addition to submitting amendments to DWR through the WUE data portal, copies of amendments or changes to the plans will be submitted to the California State Library, and any city or county within which the supplier provides water supplies within 30 days after adoption.
City of Santa Rosa 2025 Urban Water Management Plan
June 2026
APPENDIX A: ADOPTION RESOLUTION FOR 2025 URBAN WATER
MANAGEMENT PLAN AND 2025 WATER SHORTAGE
CONTINGENCY PLAN
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City of Santa Rosa 2025 Urban Water Management Plan
June 2026
APPENDIX B: PUBLIC NOTICES FOR URBAN WATER MANAGEMENT
PLAN AND WATER SHORTAGE CONTINGENCY PLAN
January 20, 2026
To: Interested Parties
Re: Notice of Preparation of City of Santa Rosa 2025 Urban Water Management Plan and 2025 Water Shortage Contingency Plan
The California Urban Water Management Planning Act requires each urban water purveyor serving more than 3,000 connections or 3,000 acre-feet annually to prepare and submit an Urban Water Management Plan (UWMP) every five years.
Per Water Code Section 10621(b), the City of Santa Rosa (City) is providing notice that it is preparing its 2025 UWMP. The City’s 2025 UWMP will provide an update and analysis regarding the City’s projected water demand, water supply, and water supply reliability for the next 25 years, through 2050.
The UWMP will include an updated Water Shortage Contingency Plan (WSCP) that describes how the City will respond to water shortage conditions in times of drought, supply reductions, or emergencies.
The UWMP and WSCP are due to the California Department of Water Resources by July 1, 2026.
If your agency would like to participate or provide input during the preparation of the City’s 2025 UWMP or its 202 5 WSCP, please contact me at (707) 543-3962 or [email protected]. You can find additional information on the City’s UWMP and WSCP by visiting srcity.org/UWMP.
Sincerely,
Claire Nordlie
Senior Water Resources Planner
Email Distribution List:
County of Sonoma, PRMD (Permit Sonoma)
County of Sonoma, Local Agency Formation Commission
Santa Rosa Plain Groundwater Sustainability Agency
Sonoma County Water Agency
City of Cotati
City of Petaluma
City of Rohnert Park
City of Sebastopol
City of Sonoma
Marin Municipal Water District
North Marin Water District
Town of Windsor
Valley of the Moon Water District
CITY OF SANTA ROSA
NOTICE OF PUBLIC HEARING
ADOPTION OF SANTA ROSA’S 2025 URBAN WATER MANAGEMENT PLAN
AND WATER SHORTAGE CONTINGENCY PLAN
Notice is hereby given that a public hearing will be conducted by the City Council on Tuesday, June 2, 2026 at or after 5:00 p.m. The purpose of the public hearing will be to receive public comment and recommendations prior to the City Council considering the adoption of Santa Rosa’s proposed 2025 Urban Water Management Plan and Water Shortage Contingency Plan.
Meeting access information (including instructions) and meeting documents are available online at: https://santa-rosa.legistar.com/Calendar.
Copies of the proposed 2025 Urban Water Management Plan and Water Shortage Contingency Plan are available online at srcity.org/UWMP and in person at City Hall, 100 Santa Rosa Ave, Santa Rosa, CA 95404, Room 10 and Municipal Service Center South, 69 Stony Circle, Santa Rosa, CA 95401.
Members of the public can provide public comment by attending in person at Council Chambers at 100 Santa Rosa Avenue, Santa Rosa during the City Council meeting.
The public can also view or listen to the meeting live at:
1. https://santa-rosa.legistar.com/Calendar. Click on the “In Progress” link to view;
2. Via Zoom by visiting https://srcity-org.zoom.us/J/83637533027, or by dialing 877-853- 5257 and entering Webinar ID: 836 3753 3027;
3. Comcast Channel 28 or 26 (Español), AT&T U-Verse Channel 99; and
4. Via YouTube at https://www.youtube.com/cityofsantarosa.
Comments and questions may be directed to Claire Nordlie, Senior Water Resources Planner, Santa Rosa Water, 707-543-3962 and/or [email protected]..
PUBLISHED: May 6 and May 17
Dina Manis, City Clerk, City of Santa Rosa
The City of Santa Rosa does not discriminate against individuals with disabilities in its employment, services, benefits, facilities, programs, or activities. Requests for accommodations, auxiliary aids, or services necessary to participate in a City program, service, or activity, including printed information in alternate formats, are available by contacting the City Clerk's Office at 707-543-3015 (TTY Relay at 711) or [email protected]. Requests should be submitted as far in advance as possible, but no later than two business days before the scheduled meeting.
Planning for
the future . . .
The City of Santa Rosa is preparing a
five-year update to our next Urban Water
Management Plan (UWMP) and Water
Shortage Contingency Plan (WSCP),
consistent with state law.
The UWMP details our community’s current
and future water supplies and water
demands through year 2050.
The WSCP provides our response plan for
mild to severe water shortages.
Both documents will be available for public comment for 3O days, beginning early May 2026. A public hearing is
tentatively scheduled for a June City Council meeting.
For additional information, including how you can
participate in the process, please visit . . .
srcity.org/uwmp
Planificando
para el
futuro...
La ciudad de Santa Rosa está preparando una
actualización quinquenal de su Plan de Gestión del
Agua Urbana (UWMP) y de su Plan de Contingencia
para la Escasez de Agua (WSCP), conforme con la
legislación Estatal.
El UWMP detalla los suministros de agua actuales y futuros de nuestra comunidad y las demandas de agua hasta el
año 2050.
El Plan de Contingencia por Escasez de Agua (WSCP)
proporciona nuestro plan de respuesta en caso de
escasez de agua desde leve a grave.
Ambos documentos estarán disponibles para
comentarios públicos durante 3O días, comenzando
a principios de mayo de 2026. Tentativamente, una
audiencia pública está programada durante la reunión del Concilio de la Ciudad del junio de 2O26.
Para obtener información adicional, incluyendo cómo
puede participar en el proceso, por favor visite . . .
srcity.org/uwmp
City of Santa Rosa 2025 Urban Water Management Plan
June 2026
APPENDIX C: DEPARTMENT OF WATER RESOURCES REPORTING TABLES
Workbook Contents: This workbook contains the templates for Submittal Tables that Suppliers use to organize information as part of their Urban Water Management Plans 2025 (due July 1, 2026). Table numbers correspond to the chapter number where they are described in the UWMP Guidebook. If the table name is followed by a letter, the letter corresponds to whether the table is specific for Wholesale Suppliers or Retail Suppliers only (W and R, respectively). For those table names that are not followed by a letter, these are Submittal Tables for all Suppliers.
Where to submit? Suppliers submit the completed table data and UWMPs (including the Water Shortage Contingency Plan) electronically through the WUEdata Portal (https://wuedata.water.ca.gov/). The portal will be updated and will be announced to the Urban Suppliers listserv, DWR webpage and WUEdata Portal opening page when it is available for plan and table submittals.
Unlocked templates (use with caution): The templates provided in this workbook are formated to mirror the structure of information that is submitted through the WUEdata Portal for the electronic submission of Submittal Tables in the UWMP. The tables are offered in a unprotected (unlocked) version. If needed, Suppliers may adjust the tables for their own planning needs beyond the Submittal Tables. However, preparers will still need to submit the information using the original template structure provided for their UWMP. Make changes to the tables with caution, as there are formulas, automatically filled cells, and drop-downs present throughout. To redownload the templates in their original format, visit https://wuedata.water.ca.gov in the Resources button of the Urban Water Management Plan section (no login necessary).
Templates of Submittal Tables for the Urban Water Management Plan 2025
NOTES FOR REGIONAL URBAN WATER MANAGEMENT PLANS (RUWMPs) RUWMPs will report data for each agency in the RUWMP, requiring duplicates of the submittal tables. The supplier will copy the needed tables and notate each of the copies with the name of the agency, or some other designation, identifying the table with the corresponding agency.
WUEdata upload tool for RUWMPs
RUWMPs will submit data to the WUEdata upload tool on an individual agency basis.
CA4910009 City of Santa Rosa 55,851 17,172
55,851 17,172
Submittal Table 2-1 Retail: Public Water Systems
Add additional rows as needed
NOTES: Volumes are in AF. Potable water only. Recycled water connections not included.
Volume of Water
Supplied 2025 (AF)
DWR NOTES:
Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.
Total
Public Water System
Number
Public Water System
Name
Number of Municipal
Connections 2025
Select One Name of Regional Alliance or
RUWMP (Drop Down List)
North Marin-Sonoma Alliance
NOTES: Regional Alliance includes 7 other Sonoma County Water Agency contractors and Marin Municipal Water District.
Submittal Table 2-2: Plan Identification
Type of Plan
Individual UWMP
If Water Supplier is also a member of a SB X7-7
Regional Alliance, select name from the drop-down.
Regional Urban Water Management Plan (RUWMP)
If Supplier selected RUWMP, select name from the
drop-down.
Supplier is a wholesale supplier
Supplier is a retail supplier
UWMP Tables are in calendar years
UWMP Tables are in fiscal years
Unit AF
Submittal Table 2-3: Supplier Identification
Type of Supplier (select one or both)
Fiscal or Calendar Year (select one)
If using fiscal years provide month and date that the fiscal year begins (mm/dd)
Units of measure used in UWMP
(Select from the drop down list).
DWR NOTES:
Units of measure (AF, CCF, MG) must remain consistent
throughout the UWMP as reported in Submittal Table 2-3.
NOTES:
Submittal Table 2-4 Retail: Water Supplier Information Exchange Water Code Section 10631(h)
The retail Supplier has informed the following wholesale supplier(s) of projected water use.
Wholesale Water Supplier Name
Add additional rows as needed
Sonoma County Water Agency (Sonoma Water)
NOTES:
10631(h) An urban water supplier that relies upon a wholesale agency for a source of water shall provide the wholesale agency with water use projections from that agency for that source of water in five-year increments to 20 years or as far as data is available.
Check the box if the Supplier has informed more than 10 other water suppliers of water supplies available.
Completion of the table below is optional. If not completed, include a list of the water suppliers that were informed.
Provide page number for location of the list.
Check the box if the Supplier has informed 10 or fewer other water suppliers of water supplies available.
Complete the table below.
10631(h) ... The wholesale agency shall provide information to the urban water supplier for inclusion in the urban water supplier’s plan that identifies and quantifies, to the extent practicable, the existing and planned sources of water as required by subdivision (b), available from the wholesale agency to the urban water supplier over the same five year increments, and during various water-year types in accordance with subdivision (f).
NOTES:
Submittal Table 2-4 Wholesale: Water Supplier Information Exchange Water Code Section 10631(h)
Water Supplier Name
Add additional rows as needed
2025 2030 2035 2040 2045 2050(opt)
186,445 204,795 213,615 223,060 232,923 243,222
Submittal Table 3-1 Retail: Population - Current and Projected Water Code Section 10631(a)
Population
Served
NOTES: Appendix E Demand Study Report Santa Rosa (EKI), Table 5-2 CWC 10631(a) describe the current and projected population of the service area including current and projected population…
2025 2030 2035 2040 2045 2050(opt)
Submittal Table 3-1 Wholesale: Population - Current and Projected Water Code Section 10631(a)
Population
Served
NOTES:
CWC 10631(a) describe the current and projected population of the service area… Use Type
Drop down list
May select each use multiple times
These are the only use types that will be recognized by the WUEdata online submittal tool
Potable or Non-Potable
(OPTIONAL)
Drop down list
Volume (AF)
Single Family Potable 8,359
Multi-Family Potable 3,472
Commercial Potable 1,970
Industrial Potable 349
Institutional/Governmental Potable 324
Landscape Potable 1,452
Landscape Recycled Water Non-Potable 74
Other (optional) Fireline, Construction, Yard Meter Potable 81 Other (optional)
Other Non-Revenue Water (apparent
losses, unbilled unmetered
consumption)
Potable 216
Distribution System Water Loss Real losses Potable 567
16789.5
74.1 16,864
(A) Single-family residential.
(B) Multifamily.
(C) Commercial.
(D) Industrial.
(E) Institutional and governmental.
(F) Landscape.
(G) Sales to other agencies.
4 | Water Use Characterization
Draft | November 2025 4-10
(H) Saline water intrusion barriers,
groundwater recharge, or
conjunctive use, or any combination
thereof.
(I) Agricultural.
(J) Distribution system water loss
Total
Submittal Table 4-1 Retail: Total Uses for Potable and Non-Potable Water — Actual Water Code Section 10631(d)(1)
CWC 10631(d)(1) For an urban retail water supplier, quantify, to the extent records are available, past and current water use…identifying the uses among water use sectors including but not limited to:
NOTES: Real losses, apparent losses, and other authorized unbilled uses were estimated from the CY 2024 water loss audit.
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-
3. This table identifies the unit of measure selected in Submittal Table 2-3. 2025 Actual Water Use
Add additional rows as needed
Subtotal Potable
Subtotal Non-Potable
Additional Description
(as needed)
Use Type
Drop down list
May select each use multiple times
These are the only use types that will be
recognized by the WUEdata online submittal
tool
Potable or Non-Potable
(OPTIONAL)
Drop down list
Volume (AF)
0 0
0 10631(d) (1) for an urban retail water supplier, quantify to the extent records are available, past and current water use...
NOTES:
Optional Submittal Table 4-1 Wholesale: Total Uses for Potable and Non-Potable Water — Actual Water Code Section 10631(d)(1)
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
This table identifies the unit of measure selected in Submittal Table 2-3.
Total
Add additional rows as needed
2025 Actual Water Use
Subtotal Potable
Subtotal Non-Potable
Additional Description
(as needed)
Use Type
Drop down list
May select each use multiple times
These are the only Use Types that will be recognized by the WUEdata online submittal tool
Potable or Non-Potable
(OPTIONAL)
Drop down list
2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 opt (AF)
Single Family Potable 9,722 9,832 9,994 10,192 10,417
Multi-Family Potable 3,763 3,872 4,006 4,158 4,323
Commercial Potable 2,163 2,133 2,106 2,084 2,063
Industrial Potable 343 338 334 330 327
Institutional/Governmental Potable 329 325 321 317 314
Landscape Potable 1,907 1,991 2,075 2,159 2,243
Landscape Recycled Water Non-Potable 140 140 140 140 140 Other (optional) Fireline, Construction, Yard
Meter Potable 112 113 114 115 116
Distribution System Water Loss Real Losses Potable 1,035 1,070 1,107 1,145 1,186 Other (optional)
Other Non-Revenue Water
(apparent losses, unbilled
unmetered consumption)
Potable 239.3 247.4 256.1 264.9 274.3
19,613 19,921 20,313 20,765 21,263 18,963<surface water 140 140 140 140 140 2300 <groundwater
19,753 20,061 20,453 20,905 21,403 140 <RW
21,403 <2050 total water availability in single and 5-dry-year scenarios 17,313 <2030 surface water availability in DRA
Add additional rows as needed.
Submittal Table 4-2 Retail: Total Uses for Potable, and Non-Potable Water — Projected Water Code Section 10631(d)(1)
Projected Water Use
(Report To the Extent that Records are Available)
Additional Description
(as needed)
CWC 10631(d)(1) For an urban retail water supplier, quantify, to the extent records are available... projected water use…identifying the uses among water use sectors… NOTES: Source: Appendix E, Table 5-5
2050
Total
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.
Subtotal Non-Potable
Subtotal Potable
Use Type
Drop down list
May select each use multiple times
These are the only Use Types that will be
recognized by the WUEdata online
submittal tool.
Potable or Non-Potable
(OPTIONAL)
Drop down list
2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 opt (AF)
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
10631(d) (1) for an urban retail water supplier, quantify to the extent records are available, past and current water use...
Optional Submittal Table 4-2 Wholesale: Total Uses for Potable and Non-Potable Water — Projected Water Code Section 10631(d)(1)
NOTES:
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.
Total
Add additional rows as needed
Projected Water Use (Report To the Extent that Records are Available) Subtotal Potable
Subtotal Non-Potable
Additional Description
(as needed)
Are Future Water Savings Included in Projections?
Drop down list (y/n) Yes
If "Yes" to above, state the section or page number, in the cell to the right, where citations of the codes, ordinances, or otherwise are utilized in demand projections are found.
Optional Suppliers may complete Optional Submittal Table 4-4 R to quantify the expected savings.
Appendix E,
section 5.4
Are Lower Income Residential Demands Included In Projections? Drop down list (y/n) Yes
Optional If the method for accounting Lower Income Residential Demands has been included, provide page number where this accounting can be found. N/A CWC10631 (d) (4) (A) Water use projections, where available, shall display and account for water savings estimated to result from adopted codes, standards, ordinances, or transpotation and land use plans identified by the urban water supplier, as applicable to the service area.
CWC 10631 (d) (4) (B) to the extent that an urban water supplier reports the information described in subparagraph (A), an urban water supplier shall do both of the following: (i) Provide citations of the various codes, standards, ordinances or transportation and land use plans utilized in making the projections. (ii) Indicate the extent that the water use projections consider savings from codes, standards, ordinances, or transportation and land use plans. Water use projections that do not account for these water savings shall be noted of that fact.
CWC 10631(a) Water use projections required by section 10631 shall include projected water use for single-family and multifamily residential housing needed for lower income households, as identified in the housing element of any city, county, or city and county, in the service area of the supplier .
Submittal Table 4-3 Retail: Inclusion in Water Use Projections Water Code Section 10631 (a), 10631 (d)(4)(A), and 10631 (d)(4)(B) NOTES:
DWR NOTES: Additional guidance is provided in Appendix K. 2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 opt (AF)
1,201 1,642 2,042 2,413 2,770
Water Code Section 10631(d)(4)(A) Water use projections, where available, shall display and account for the water savings estimated to result from adopted codes, standards, ordinances, or transportation and land use plans identified by the urban water supplier, as applicable to the service area.
NOTES: Appendix E Demand Study Report Santa Rosa (EKI), Table 5-4 Passive Water Conservation
Optional Submittal Table 4-4 Retail: Passive Water Savings Projections Water Code Section 10631(d)(4)(A)
Passive savings
Add additional rows as needed
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.
Description
(Codes, Standards, Ordinances, or Plans)
Public Water System ID # Reported
in Table 2-1 R Reporting Period Submitted to DWR Water
Loss Audit Program (yes/no) Instructions for adding more rows
1. Select and Copy the 5 rows designated for one PWS (dotted lines). 2020 Yes
2021 Yes
2022 Yes
2023 Yes
2024 Yes
2. Right click the row and select "Insert Copied Cells" and "Shift cells down" CWC 10631(d)(3) (A) The distribution system water loss shall be quantified for each of the five years preceding the plan update, in accordance with rules adopted pursuant to Section 10608.34.
Submittal Table 4-5 Retail: Water Loss Audit Reporting
Water Code Section 10631(d)(3)(A)
CA4910009
DWR NOTES: Suppliers will provide a link to the WUEdata submittals of their Water Loss Audit Reports.
NOTES:
CY2020:
https://wuedata.water.ca.gov/public/awwa_uploads/2618390738/Santa%20Rosa%2 0City%20of%20%5F%202020.xlsx
CY2021:
https://wuedata.water.ca.gov/public/awwa_uploads/8844892203/Santa%20Rosa%2 0City%20of%20%5F%202021.xlsx
CY2022:
https://wuedata.water.ca.gov/public/awwa_uploads/4000196158/Final%20Santa%2 0Rosa%20City%20of%202022.xlsx
CY2023:
https://wuedata.water.ca.gov/public/awwa_uploads/6117261588/City%20of%20San ta%20Rosa%20CY2023%20%2D%20Validated%20Audit.xlsx
CY2024:
https://wuedata.water.ca.gov/public/awwa_uploads/5419845402/City%20of%20San ta%20Rosa%20CY2024%20%2D%20Validated%20Audit.xlsx
Report submittal status for all five years for each Public Water System as available.
Add rows as needed
Public Water System ID #Reporting Period
Submitted to DWR Water
Loss Audit Program
(yes/no) Instructions for adding more rows
1. Select and Copy the 5 rows designated for one PWS (dotted lines). 2020
2021
2022
2023
2024
2. Right click the row and select "Insert Copied Cells" and "Shift cells down" CWC 10631(d)(3) (A) The distribution system water loss shall be quantified for each of the five years preceding the plan update, in accordance with rules adopted pursuant to Section 10608.34.
DWR NOTES: Suppliers will provide a link to the WUEdata submittals of their Water Loss Audit Reports.
Optional Submittal Table 4-5 Wholesale: Water Loss Audit Reporting Water Code Section 10631(d)(3)(A)
Report submittal status for all five years for each Public Water System as available.
Add rows as needed
NOTES:
Instructions for adding more rows
1. Select and Copy the entire row (dotted lines).
2028 Real Water Loss
Standard per Unit per
day
Units for Real
Water Loss
Drop down list
Number of Units
(Connections or Miles
corresponding with
units selected)
Volume of Total Real
Loss
(from AWWA Water
Loss Audit)
(AF)
2028 Apparent Water
Loss Standard per
Unit per Day
Units for
Apparent Water
Loss
Number of
Connections
Volume of Total
Apparent Loss
(from AWWA Water
Loss Audit)
(AF)
CA4910009 Yes 17.1
Gallons per
Service
Connection per
Day (GPSCD)
53,681 567.1
9.4 3.5
Gallons per
Service
Connection per
Day (GPSCD)
53,681 205.4
3.4 2. Right click the row and select "Insert Copied Cells" and "Shift cells down" Gallons per
Service
Connection per
Day (GPSCD)
Gallons per
Service
Connection per
Day (GPSCD)
CWC 10631(d)(3)(C) In the plan due July 1, 2021, and in each update thereafter, data shall be included to show whether the urban retail water supplier met the distribution loss standards enacted by the board pursuant to Section 10608.34.
Submittal Table 4-6 Retail: Progress Towards 2028 Water Loss Standard Water Code Section 10631(d)(3)(C)
NOTES: Most recent AWWA Water Loss Audit was for CY 2024.
Apparent Water Loss
Did the Water Board Calculate a
Water Loss Standard for this
Public Water System? (y/n)
If no, Supplier will not complete
this row.
Real Water Loss
Water Board's Calculated Water Loss Standards
DWR NOTES: Units of measure (AF, CCF, MG) for Water Loss MUST remain consistent with units reported in Submittal Table 2-3. The units reported in Submittal Table 2-3 are used in this table's calculations.
Public Water
System ID #
Reported in
Submittal Table 2-1
R
Add additional rows as needed.
Most Recent AWWA Water Loss Audit
Real Water
Loss Per Unit
per Day
Most Recent AWWA Water Loss Audit
Apparent Water
Loss Per Unit per
Day
State Water Board Standard State Water Board Standard
Actual 2025 GPCD
(From SB X7-7
Compliance Form)
Did Supplier meet
the 2020 Target in
2025?
No Individual Target 126 99 Yes NA
10608.40 Urban water retail suppliers shall report to the department on their progress in meeting their urban water use targets as part of their urban water management plans submitted pursuant to Section 10631.
Submittal Table 5-1 Retail: SB X7-7 2020 Target Progress Water Code Section 10608.40
NOTES:
Did Supplier
Achieve Targeted
Reduction for
2020?
Actual 2020 GPCD2020 Target
Regional Alliance
Target or
Individual
Target?
Drop down list
DWR NOTES:
Suppliers calculating a 2025 GPCD will need to complete and submit SB X 7-7 Compliance Tables to verify the use of SB X7-7 Methodologies.
Suppliers that were part of a merger or consolidation since 2020 see Chapter 5 and Appendix P for guidance.
NA=Not Applicable
Check the box if the Supplier was not an Urban Water Supplier during or before the 2020 UWMP reporting cycle.
Proceed to the next table.
Only for suppliers that did not meet the
Target in 2020
See DWR NOTES below.
Was Supplier part of a
merger or
consolidation since
2020?
Groundwater Type
Drop Down List
May use each category
multiple times
Potable or
Non-Potable
(OPTIONAL)
Drop down list
Location or Basin Name 2021 (AF) 2022 (AF) 2023 (AF) 2024 (AF) 2025 (AF) Alluvial Basin Potable Santa Rosa Plain 1,324 1,057 1,234 1,001 1326.1 1,324 1,057 1,234 1,001 1,326
Add additional rows as needed
10631(4) If groundwater is identified as an existing or planned source of water available to the supplier, all of the following information:
(C) A detailed description and analysis of the location, amount, and sufficiency of groundwater pumped by the urban water supplier for the past five years. The description and analysis shall be based on information that is reasonably available, including, but not limited to, historic use records.
Submittal Table 6-1 Retail: Groundwater Volume Pumped
Water Code Section 10631(4) and 10631(4)(c)
DWR NOTES:
Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.
NOTES
Total
Check the box if the Supplier does not pump groundwater.
Proceed to the next table.
Check the box if all or part of the groundwater described below is desalinated. (OPTIONAL)
Groundwater Type
Drop Down List
May use each category
multiple times
Potable or Non-
Potable
(OPTIONAL)
Drop down list
Location or Basin Name2021 (AF) 2022 (AF) 2023 (AF) 2024 (AF) 2025 (AF) 0 0 0 0 0
10631(4) If groundwater is identified as an existing or planned source of water available to the supplier, all of the following (C) A detailed description and analysis of the location, amount, and sufficiency of groundwater pumped by the urban water supplier for the past five years. The description and analysis shall be based on information that is reasonably available, including, but not limited to, historic use records.
Submittal Table 6-1 Wholesale: Groundwater Volume Pumped Water Code Section 10631(4) and 10631(4)(C)
Check the box if the Supplier does not pump groundwater.
Proceed to the next table.
NOTES:
DWR NOTES:
Total
Check the box if all or part of the groundwater described below is desalinated. (OPTIONAL) Add additional rows as needed
Name of Wastewater
Collection Agency
Wastewater
Volume Metered
or Estimated?
OPTIONAL
Drop Down List
Volume of Wastewater
Collected from UWMP
Service Area 2025 (AF)
Name of Wastewater
Treatment Plant (WWTP) and
Place ID Number
Drop down list
Is WWTP Located
Within UWMP
Area?
Drop Down List
Santa Rosa Regional
System Estimated 21,973
Santa Rosa Laguna Subregional
Water Reclamation Facility,
Place ID 255703
No
21,973
CWC 10633(a) A description of the wastewater collection and treatment systems in the supplier’s service area, including a quantification of the amount of wastewater collected and treated and the methods of wastewater disposal.
Check the box if there is no wastewater collection system.
Proceed to the next table.
NOTES:
Submittal Table 6-2 Retail: Wastewater Collected Within Service Area Water Code Section 10633(a)
Percentage of 2025 service area population served by wastewater collection system (OPTIONAL)
Percentage of 2025 service area served by wastewater collection system (OPTIONAL) DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.
Additional Guidance: See Appendix M, Section M.21 for detailed guidance on this table.
Wastewater Collection Recipient of Collected Wastewater Total Wastewater Received from UWMP
Service Area in 2025:
Add additional rows as needed
Treatment Level
Drop down list
Volume
(AF)
Treatment Level
Drop down list
Volume
(AF)
Treatment Level
Drop down list
Volume
(AF)
Treatment Level
Drop down list
Volume
(AF)
Treatment Level
Drop down list
Volume
(AF)
Name of other
entity
Santa Rosa Laguna
Subregional Water
Reclamation Facility,
Yes 21973 21,973 Tertiary 21,973 - 0 0 0 21,973 21,973 21,973 0 0 0 0
Submittal Table 6-3 Retail: Wastewater Treatment and Outcomes Within UWMP Service Area Water Code Section 10633(b)
DWR NOTES:
Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.
IPR: Indirect Potable Reuse would have the treatment level of its end use requirement in the Level of Treatment drop-down.
Additional Guidance: See Appendix M, Section M.21 for detailed guidance on this table.
Water Recycled Outside of
UWMP Service Area
(enter data as applicable)
Effluent Discharge that is
not a Permitted Recycled
Water Use
(enter data as applicable)
Required Discharge for
Instream Flow
(enter data as applicable)
Delivered to Another Entity for Additional
Treatment
(enter data as applicable)
Add additional rows as needed
10633. The plan shall provide, to the extent available, information on recycled water and its potential for use as a water source in the service area of the urban water supplier...and shall include all of the following:
(b) A description of the quantity of treated wastewater that meets recycled water standards, is being discharged, and is otherwise available for use in a recycled water project. 2025 Outcomes of Treated Wastewater
Check the box if no wastewater is treated or disposed of within the UWMP service area.
Proceed to the next table.
Does This Plant
Treat
Wastewater
Generated
Outside the
UWMP Service
Area?
(OPTIONAL)
Drop down list
Wastewater Treatment
Plant Name and Place ID
Number
Drop down list
Total 2025
Volume of
Water
Treated
(AF)
NOTES:
Total
2025 Volume of
Wastewater
Received from
UWMP Service
Area
(As Reported in
Submittal Table
6-2 R) (AF)
Water Recycled Within
UWMP Service Area
(enter data as applicable)
Treatment Level
Drop down list
Volume
(AF)
Treatment Level
Drop down list
Volume
(AF)
Treatment Level
Drop down list
Volume
(AF)
Treatment Level
Drop down list
Volume
(AF)
Treatment Level
Drop down list
Volume
(AF) Name of other entity
0 0 0 0 0 0 0
10633. The plan shall provide, to the extent available, information on recycled water and its potential for use as a water source in the service area of the urban water supplier. ...and shall include all of the following:
(b) A description of the quantity of treated wastewater that meets recycled water standards, is being discharged, and is otherwise available for use in a recycled water project.
Total
DWR NOTES:
Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.
IPR: Indirect Potable Reuse would have the treatment level of its end use requirement in the Level of Treatment drop-down.
Additional Guidance: See Appendix M, Section M.21 for detailed guidance on this table.
NOTES:
Add additional rows as needed.
Submittal Table 6-3 Wholesale: Wastewater Treatment and Discharge Within Service Area Water Code Section 10633(b)
Check the box if the Wholesale Supplier neither distributes nor provides supplemental treatment to recycled water.
Proceed to the next table.
2025 Volume of
Wastewater
Received from
UWMP Service
Area (AF)
2025 Outcomes of Treated Wastewater
Water Recycled Within
UWMP Service Area
(enter data as applicable)
Water Recycled Outside of
UWMP Service Area
(enter data as applicable)
Effluent Discharge that is not a
Permitted Recycled Water Use
(enter data as applicable)
Required Discharge for
Instream Flow
(enter data as applicable)
Delivered to Another Entity for Additional Treatment
(enter data as applicable)
Wastewater
Treatment Plant
Name and Place ID
Number
Drop down list
Does This Plant
Treat Wastewater
Generated
Outside the
UWMP Service
Area?
(OPTIONAL)
Drop down list
Total 2025
Volume of
Water
Treated
(AF)
Volume Narrative page number
(OPTIONAL)
Landscape irrigation (exc golf
courses) Non-Potable
Parks, medians,
HOAs, Commercial
landscapes, Multifamily
residential
common areas
74 140 140 140 140 140
0 0 0 0 0 0 0
74 140 140 140 140 140 0
74.1 140 140 140 140 140 0 0
10633. The plan shall provide, to the extent available, information on recycled water and its potential for use as a water source in the service area of the urban water supplier... and shall include...
(c) A description of the recycled water currently being used in the supplier’s service area, including, but not limited to, the type, place, and quantity of use d) A description and quantification of the potential uses of recycled water, including, but not limited to, agricultural irrigation, landscape irrigation, wildlife habitat enhancement, wetlands, industrial reuse, groundwater recharge, indirect potable reuse, and other appropriate uses, and a determination with regard to the technical and economic feasibility of serving those uses.
(e) The projected use of recycled water within the supplier’s service area at the end of 5, 10, 15, and 20 years, and a description of the actual use of recycled water in comparison to uses previously projected pursuant to this subdivision.
Total
Use Type
Drop down list
Potable or Non-Potable
(after treatment if treated)
(OPTIONAL)
Drop down list
Additional Information
(as needed)
Add additional rows as needed
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.
Additional Guidance: See Appendix M, Section M.21 for detailed guidance on this table.
Potential recycled water use: a description of the feasibility of these uses must be included in the narrative.
Multiple Producers: If you have multiple recycled water producers, submit a separate table for each.
NOTES:
2050 (AF)2025 (AF) 2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) Subtotal Potable
Subtotal Non-Potable
Check box if recycled water is not used and is not planned for use within the service area of the supplier. The supplier will only complete the column on "Potential Recycled Water Use" and submit an accompanying narrative on the feasibility of that potential recycled water use.
Submittal Table 6-4 Retail: Recycled Water Direct Beneficial Uses Within Service Area Water Code Section 10633 (c),(d),(e)
Potential Recycled Water Use
Name(s) of Facility/ies Producing (Treating) the Recycled Water (OPTIONAL) : Laguna Treatment Plant Name of Supplier Operating the Recycled Water Distribution System (OPTIONAL) :
Volume of Supplemental Water Added in 2025 (OPTIONAL) :
Source of 2025 Supplemental Water (OPTIONAL) :
Volume (AF) Narrative page number
(OPTIONAL)
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
10633. The plan shall provide, to the extent available, information on recycled water and its potential for use as a water source in the service area of the urban water supplier... and shall include...
(c) A description of the recycled water currently being used in the supplier’s service area, including, but not limited to, the type, place, and quantity of use
d) A description and quantification of the potential uses of recycled water, including, but not limited to, agricultural irrigation, landscape irrigation, wildlife habitat enhancement, wetlands, industrial reuse, groundwater recharge, indirect potable reuse, and other appropriate uses, and a determination with regard to the technical and economic feasibility of serving those uses. (e) The projected use of recycled water within the supplier’s service area at the end of 5, 10, 15, and 20 years, and a description of the actual use of recycled water in comparison to uses previously projected pursuant to this subdivision.
Total
NOTES:
Subtotal Non-Potable
2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF)
Submittal Table 6-4 Wholesale: Current and Projected Recycled Water Uses Water Code Section 10633(c),(d),(e)
DWR NOTES:
Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table reports the unit of measure selected in Submittal Table 2-3.
Additional Guidance: See Appendix M, Section M.21 for detailed guidance on this table.
Potential recycled water use: a description of the feasibility of these uses must be included in the narrative.
Multiple Producers: If you have multiple recycled water producers, submit a separate table for each.
Add additional rows as needed
Name of Receiving
Supplier or Direct Use by
Wholesale Supplier
Potable or Non-Potable
(after treatment if treated)
(OPTIONAL)
Drop down list
Additional
Information
(as needed)
Name(s) of Facility/ies Producing (Treating) the Recycled Water (OPTIONAL) :
Name of Supplier Operating the Recycled Water Distribution System (OPTIONAL) :
Volume of Supplemental Water Added in 2025 (OPTIONAL) :
Source of 2025 Supplemental Water (OPTIONAL) :
Check box if recycled water is not used and is not planned for use within the service area of the supplier. The supplier will only complete the column on "Potential Recycled Water Use" and submit an accompanying narrative on the feasibility of that potential recycled water use.
Potential Recycled Water Use
2050 (AF)2025 (AF)
Subtotal Potable
2020 Projection
for 2025 (AF)
2025 Actual
Use (AF)
140 74
140 74
NOTES:
Total
DWR NOTES:
Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure reported in Submittal Table 2-3 Additional Guidance: See Appendix M, Section M.21 for detailed guidance on this table.
Use Type
Drop Down list
10633. The plan shall provide, to the extent available, information on recycled water and its potential for use as a water source in the service area of the urban water supplier. The preparation of the plan shall be coordinated with local water, wastewater, groundwater, and planning agencies that operate within the supplier’s service area, and shall include all of the following: (e) ...a description of the actual use of recycled water in comparison to uses previously projected pursuant to this subdivision
Submittal Table 6-5 Retail: 2020 UWMP Recycled Water Use Projection Compared to 2025 Actual
Water Code Section 10633(e)
Check the box if recycled water was not used in 2025 nor previously projected for use in 2020.
Proceed to the next table.
Add additional rows as needed
Landscape irrigation (exc golf courses)
2020 Projection
for 2025 (AF) 2025 Actual Use (AF)
0 0
Submittal Table 6-5 Wholesale: 2020 UWMP Recycled Water Use Projection Compared to 2025 Actual
Water Code Section 10633(e)
Add additional rows as needed
DWR NOTES:
Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-
3. Additional Guidance: See Appendix M, Section M.21 for detailed guidance on this table.
NOTES:
10633. The plan shall provide, to the extent available, information on recycled water and its potential for use as a water source in the serv`ice area of the urban water supplier. The preparation of the plan shall be coordinated with local water, wastewater, groundwater, and planning agencies that operate within the supplier’s service area, and shall include all of the following: (e) ...a description of the actual use of recycled water in comparison to uses previously projected pursuant to this subdivision
Check the box if recycled water was not used or distributed by the supplier in 2025, nor projected for use or distribution in 2020.
Proceed to the next table.
Total
Name of Receiving Supplier or Direct
Use by Wholesale Supplier
Section 6.3.3
Name of Action Description Expected Increase in Recycled Water Use (AF)
0 0
Total (AF)
10633. The plan shall provide, to the extent available, information on recycled water and its potential for use as a water source in the service area of the urban water supplier. The preparation of the plan shall be coordinated with local water, wastewater, groundwater, and planning agencies that operate within the supplier’s service area, and shall include all of the following:
(f) a description of actions, including financial incentives, which may be taken to encourage the use of recycled water, and the projected results of these actions in terms of acre feet of recycled water used per year.
DWR NOTES:
Units of measure (AF, CCF, MG) MUST remain consistent with units reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.
The unit conversion to Acre Feet addresses the Water Code's requirement that this value be provided in acre-feet.
NOTES:
Submittal Table 6-6 Retail: Methods to Encourage Future Recycled Water Use Water Code Section 10633(f)
Check the box if the Supplier does not plan to expand recycled water use in the future. Supplier will not complete the table below but will provide narrative explanation.
Provide page location of narrative in the UWMP
Add additional rows as needed
Unit Conversion to AF
Planned Implementation Year
Section 6.7
Drop Down
List
(yes/no)
If Yes, Supplier Name
Water Supply
Alternatives Plan No See more details in
Section 6.7 Potable 2035-2040 All Year Types 800 - 1,800 10631 (f) Include a description of all water supply projects and water supply programs that may be undertaken by the urban water supplier to meet the total projected water use, as established pursuant to subdivision (a) of Section 10635. The urban water supplier shall include a detailed description of expected future projects and programs that the urban water supplier may implement to increase the amount of the water supply available to the urban water supplier in normal and single-dry water years and for a period of drought lasting five consecutive water years. The description shall identify specific projects and include a description of the increase in water supply that is expected to be available from each project. The description shall include an estimate with regard to the implementation timeline for each project or program.
Planned for Use in
Year Type
Drop Down List
NOTES: There are other potential supply options that may be implemented. Future UWMPs will continue to be revised as new projections are known with more certainty.
Submittal Table 6-7 Retail: Expected Future Water Supply Projects or Programs Water Code Section 10631(f)
DWR NOTES:
Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure reported in Submittal Table 2-3.
Check the box if some or all of the supplier's future water supply projects or programs are not compatible with this table and are described in a narrative format.
Check the box if there are no expected future water supply projects or programs that provide a quantifiable increase to the agency's water supply.
Proceed to the next table.
Planned
Implementation
Year
Add additional rows as needed
Joint Project with other suppliers? Expected
Increase in
Water Supply
to Supplier
(This may be a
range) (AF)
Provide page location of narrative in the UWMP
Name of Future Projects
or Programs
Additional Description
(as needed)
Potable or Non-Potable
(after treatment if treated)
(OPTIONAL)
Drop Down list
Drop Down List
(yes/no) If Yes, Supplier Name
10631 (f) Include a description of all water supply projects and water supply programs that may be undertaken by the urban water supplier to meet the total projected water use, as established pursuant to subdivision (a) of Section 10635. The urban water supplier shall include a detailed description of expected future projects and programs that the urban water supplier may implement to increase the amount of the water supply available to the urban water supplier in normal and single-dry water years and for a period of drought lasting five consecutive water years. The description shall identify specific projects and include a description of the increase in water supply that is expected to be available from each project. The description shall include an estimate with regard to the implementation timeline for each project or program.
Provide page location of narrative in the UWMP
Check the box if some or all of the supplier's future water supply projects or programs are not compatible with this table and are described in a narrative format.
Check the box if there are no expected future water supply projects or programs that provide a quantifiable increase to the agency's water supply.
Proceed to the next table.
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure reported in Submittal Table 2-3.
NOTES:
Add additional rows as needed
Submittal Table 6-7 Wholesale: Expected Future Water Supply Projects or Programs Water Code Section 10631(f)
Name of Future Projects
or Programs
Additional
Description
(as needed)
Potable or Non-Potable
(after treatment if treated)
(OPTIONAL)
Drop down list
Planned Implementation
Year
Planned for Use in
Year Type
Drop Down list
Expected Increase in Water
Supply to Supplier
(This may be a range) (AF)
Joint Project with other
suppliers?
Water Supply
Drop down list
May use each category multiple times.
These are the only water supply
categories that will be recognized by the
WUEdata online submittal tool
Potable or Non-Potable
(after treatment if treated)
(OPTIONAL)
Drop Down list
Actual Volume
(AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes' below
(AF)
Purchased or Imported WaterSonoma Water Potable 15,846
Groundwater (not desalinated)City production wells Potable 1,326 Recycled Water Santa Rosa Regional Reuse Facility Non-Potable 74 17,172 0
74 0
17,246 0
10631. A plan shall be adopted in accordance with this chapter that shall do all of the following... (b) Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier over the same five-year increments described in subdivision (a), providing supporting and related information...
Submittal Table 6-8 Retail: Water Supplies — Actual
Water Code Section 10631(b)
2025
NOTES:
DWR NOTES:
Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.
Total Entitlement: e.g. Water Right, Groundwater Allocation, Contracted Amount.
Add additional rows as needed
Total
Subtotal Potable
Subtotal Non-Potable
Additional Description
(as needed)
Water Supply
Drop down list
May use each category multiple
times.These are the only water supply
categories that will be recognized by
the WUEdata online submittal tool
Potable or Non-Potable
(after treatment if treated)
(OPTIONAL)
Drop Down list
Actual Volume
(AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes' below
(AF)
0 0
0 0
0 0
10631. A plan shall be adopted in accordance with this chapter that shall do all of the following... (b) Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier over the same five-year increments described in subdivision (a), providing supporting and related information
NOTES:
2025
Submittal Table 6-8 Wholesale: Water Supplies — Actual
Water Code Section 10631(b)
DWR NOTES:
Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.
Total Entitlement: e.g. Water Right, Groundwater Allocation, Contracted Amount.
Total
Subtotal Potable
Subtotal Non-Potable
Add additional rows as needed
Additional Description
(as needed)
2021 (AF) 2022 (AF) 2023 (AF) 2024 (AF) 2025 (AF)
0 0 0 0 0Total
NOTES:
Optional Table 6-8DS: Source Water Desalination by Urban Water Supplier Check the box if the Supplier does not reduce salinity in either groundwater or surface water prior to distribution.
Volume of Water Desalinated
DWR NOTES:
Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submital Table 2-3. This table identifies the units of measure reported in Submittal Table 2-3.
Add additional rows as needed
Desalination Facility
Drop Down list
Plant
Capacity
Intake Type
Drop down list
Source Water Type
Drop down list
Influent
TDS
Brine Discharge
Drop down list
Name(s) of Agencies
that Receive this Water
Water Supply
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
Purchased or Imported Water Potable 29,100 29,100 29,100 29,100 29,100 Groundwater (not
desalinated) Potable 2,300 3,100 4,100 4,100 4,100
Recycled Water Non-Potable 140 140 140 140 140
31,400 0 32,200 0 33,200 0 33,200 0 33,200 0
140 0 140 0 140 0 140 0 140 0
31,540 0 32,340 0 33,340 0 33,340 0 33,340 0
Submittal Table 6-9 Retail: Water Supplies — Projected
Water Code Section 10631 (b)
Projected Water Supply (Report to the Extent Practicable) Drop down list
May use each category multiple
times. These are the only water
supply categories that will be
recognized by the WUEdata online
submittal tool
Additional
Detail on
Water
Supply
Potable or Non-Potable
(after treatment if treated)
(OPTIONAL)
Drop Down list
10631. A plan shall be adopted in accordance with this chapter that shall do all of the following... (b) Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier over the same five-year 2050 (opt)
Add additional rows as needed
Total
NOTES:
2030 2035 2040 2045
Subtotal Non-Potable
Subtotal Potable
DWR NOTES:
Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
Total Entitlement: e.g. Water Right, Groundwater Allocation, Contracted Amount.
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
10631. A plan shall be adopted in accordance with this chapter that shall do all of the following... (b) Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier over the same five-year Add additional rows as needed
Total
NOTES:
Subtotal Potable
Subtotal Non-Potable
DWR NOTES:
Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in a Submittal Table 2-3.
Total Entitlement: e.g. Water Right, Groundwater Allocation, Contracted Amount.
Submittal Table 6-9 Wholesale: Water Supplies — Projected Water Code Section 10631 (b)
Water Supply Projected Water Supply (Report to the Extent Practicable) 2030 2035 2040 2045 2050 (opt)Drop down list
May use each category multiple
times.These are the only water
supply categories that will be
recognized by the WUEdata online
submittal tool
Additional
Detail on
Water
Supply
Potable or Non-Potable
(after treatment if treated)
(OPTIONAL)
Drop Down list
Units for
Water
Volume
Extract and
Divert
Place into
StorageConveyanceTreatment DistributionTotal Utility
See DWR NOTES Hydropower Net Utility
0 N/A 0 0
N/A 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.00
Quantity of Self-Generated Renewable Energy
0 kWh
Data Quality (Estimate, Metered Data, Combination of Estimates and Metered Data) Data Quality Narrative:
Narrative:
(1) An estimate of the amount of energy used to extract or divert water supplies. (6) An estimate of the amount of energy used to place water into or withdraw from storage.
Optional Submittal Table O-1A: Recommended Energy Reporting - SINGLE DELIVERY PRODUCT - WATER SUPPLY PROCESS APPROACH Water Delivery Product
drop down list
(If delivering more than one type of product recommend using Table O- 1C)
Only for Water Delivery Products Under the Urban Water Supplier's Operational Control Start Date of Reporting Period
Water Management Process Non-Consequential Hydropower
(if applicable)End Date of Reporting Period
Is upstream embedded energy included in the values reported? Volume of Water Entering Process
Energy Consumed (kWh)
Energy Intensity (kWh/vol. converted to MG)
DWR NOTES: Total Utility:The volume of water entered in the “Total Utility” column should equal the volume of water entering the distribution system (excluding recycled water); in most cases, this is the total volume calculated in UWMP Table 4-1: 2025 Actual Total Uses for Potable and Non-Potable Water. Note if recycled water is included in your Submittal Table 4-1, you must exclude it from your volume in this table. (5) An estimate of the amount of energy used for treated water supplies in comparison to the amount used for nontreated water supplies. (7) Any other energy-related information the urban water supplier deems appropriate. 10631.2 (b) The Department shall include in its guidance for the preparation of urban water management plans a methodology for the voluntary calculation or estimation of the energy intensity of urban water systems.
NOTES:
10631.2. (a) In addition to the requirements of Section 10631, an urban water management plan shall include any of the following information that the urban water supplier can readily obtain:
(2) An estimate of the amount of energy used to convey water supplies to the water treatment plants or distribution systems. (3) An estimate of the amount of energy used to treat water supplies. (4) An estimate of the amount of energy used to distribute water supplies though its distribution systems.
Water Delivery Product
drop down list
(If delivering more than one type of product recommend using Table O-1C)
Start Date of Reporting Period
End Date of Reporting Period
Is upstream embedded energy in the values reported?
Units of Measure for Water Total Utility
See DWR NOTES Hydropower Net Utility
-
-
- - - Quantity of Self-Generated Renewable Energy
0 kWh
Data Quality (Estimate, Metered Data, Combination of Estimates and Metered Data) Data Quality Narrative:
Narrative:
(1) An estimate of the amount of energy used to extract or divert water supplies. 10631.2 (b) The Department shall include in its guidance for the preparation of urban water management plans a methodology for the voluntary calculation or estimation of the energy intensity of urban water systems.
(5) An estimate of the amount of energy used for treated water supplies in comparison to the amount used for nontreated water supplies.
Optional Submittal Table O-1B: Recommended Energy Reporting - SINGLE DELIVERY PRODUCT - TOTAL UTILITY APPROACH 10631.2. (a) In addition to the requirements of Section 10631, an urban water management plan shall include any of the following information that the urban water supplier can readily obtain:
(3) An estimate of the amount of energy used to treat water supplies. (4) An estimate of the amount of energy used to distribute water supplies though its distribution systems.
Only for Water Delivery Products Under the Urban Water Supplier's Operational Control Sum of All Water Management
Processes Non-Consequential Hydropower
DWR NOTES:
Total Utility:The volume of water entered in the “Total Utility” column should equal the volume of water entering the distribution system (excluding recycled water); in most cases, this is the total volume calculated in UWMP Table 4-1: 2025 Actual Total Uses for Potable and Non-Potable Water. Note if recycled water is included in your Submittal Table 4-1, you must exclude it from your volume in this table. (2) An estimate of the amount of energy used to convey water supplies to the water treatment plants or distribution systems.
NOTES:
Volume of Water Entering Process
Energy Consumed (kWh)
Energy Intensity (kWh/vol. converted to MG)
(6) An estimate of the amount of energy used to place water into or withdraw from storage. (7) Any other energy-related information the urban water supplier deems appropriate.
Start Date of Reporting Period 1/1/2024
End Date of Reporting Period 12/31/2024
Is upstream embedded energy in the
values reported? No
Units of Measure for Water AF
Extract and DivertPlace into Storage ConveyanceTreatment Distribution Total Utility See DWR NOTESHydropower Net Utility
1001 17196 17196 N/A
100% 100%
100% 0% 0% 0% 100% N/A 0% N/A
913,523 2,627,815 3,541,338 3,541,338
2800.1 0.0 0.0 0.0 469.0 N/A 0.0 N/A
Delivery Volume by
Product (volume
units defined
above)
Total Energy
Intensity
(kWh/volume)
Net Energy
Intensity
(kWh/volume)
17196 205.9 205.9
- -
- -
- -
- -
- -
- -
17196 205.9 205.9
Quantity of Self-Generated Renewable Energy
65340 kWh
Data Quality (drop down)
Combination of Estimates and Metered
Data
Data Quality Narrative:
Narrative:
Total of All Products
DWR NOTES: The volume of water entered in the “Total Utility” column should equal the volume of water entering the distribution system (excluding recycled water); in most cases, this is the total volume calculated in UWMP Table 4-1: 2025 Actual Total Uses for Potable and Non- Potable Water. Note if recycled water is included in your Submittal Table 4-1, you must exclude it from the volume reported in Table O1-C..
Water volume data is calculated using City records and local power provider billing information.
Energy is consumed during water pumping and distribution. Energy is produced through solar arrays.
NOTES:
Other
Total Percentage [must equal 100%]
Total Energy Consumed by Each Process for All Product Types (kWh) Energy Intensity (kWh/vol. converted to MG)
DWR NOTES: The volume of water entered in the “Total Utility” column should equal the volume of water entering the distribution system (excluding recycled water); in most cases, this is the total volume calculated in UWMP Table 4- 1: 2025 Actual Total Uses for Potable and Non-Potable Water. Note if recycled water is included in your Submittal Table 4-1, you must exclude it from your volume in this table.
Product Type
Retail Potable
Retail Non-Potable
Wholesale Potable
Wholesale Non-Potable
Agricultural
Environmental
Retail Potable Deliveries (%)
Enter in Column C
of table below
Retail Non-Potable Deliveries (%)
Wholesale Potable Deliveries(%)
Wholesale Non-Potable Deliveries (%)
Agricultural Deliveries (%)
Environmental Deliveries (%)
Other (%)
Total Volume of Water Entering Each Process for All Product Types Optional Submittal Table O-1C: Recommended Energy Reporting - MULTIPLE WATER DELIVERY PRODUCTS - WATER PROCESS APPROACH Only for Water Delivery Products Under the Urban Water Supplier's Operational Control Water Management Processes Non-Consequential Hydropower (if applicable)
Start Date of Reporting Period1/1/2024
End Date of Reporting Period12/31/2024
Is upstream embedded energy in the values reported?No
Units of Measure for WaterAF Collection /
Conveyance Treatment Discharge /
Distribution Total
21973 21973
499008.7 499008.7
69.7 0.0 0.0 69.7
21973 89 22062
28437717 2193923 30631640
0.0 3971.8 75650.9 4261.0
Quantity of Self-Generated Renewable Energy related to recycled water and wastewater operations
11423100 kWh
Data Quality (drop down)
Metered Data
Data Quality Narrative:
Narrative:
Optional Submittal Table O-2: Recommended Energy Reporting - WASTEWATER AND RECYCLED WATER Only for Water Delivery Products Under the Urban Water
Supplier's Operational Control
Water Management Process
Data is not readily available to break wastewater entering into process, into collection/conveyance, treatment and discharge/distribution. All wastewater data is therefore grouped under treatment.
Energy is consumed during water pumping, reclamation and recycling processes. Energy is produced through on combined heat and power system.
NOTES:
Volume of Wastewater Entering Process (volume units selected above) Wastewater Energy Consumed (kWh)
Volume of Recycled Water Entering Process (volume units selected above) Recycled Water Energy Consumed (kWh)
Wastewater Energy Intensity (kWh/volume converted to MG) Recycled Water Energy Intensity (kWh/volume converted to MG) % of Average Supply
Average Year 1999 100%
Single-Dry Year 1977
Consecutive Dry Years 1st Year 1987
Consecutive Dry Years 2nd Year 1988
Consecutive Dry Years 3rd Year 1989
Consecutive Dry Years 4th Year 1990
Consecutive Dry Years 5th Year 1991
31,540
22,053
Year Type
Base Year
If not using a calendar
year, type in the last
year of the fiscal,
water year, or range
of years, for example,
water year 2024-
2025, use 2025
Optional Submittal Table 7-1 Retail: Basis of Water Year Data (Reliability Assessment) Available Supplies if
Year Type Repeats
Check the box if quantification of available supplies is not compatible with this table and is provided elsewhere in the UWMP.
Location: [insert location from UWMP]
Volume Available (AF)
Quantification of available supplies is provided in this table as either volume only, percent only, or both.
22,053
22,053
NOTES: All supplies reported in this table are based on 2030 projected conditions. Additional supplies are estimated to be available in all year types based on new projects coming online in future years, and due to changing demands. Average year supplies are based on 29,100 AFY contract water entitlement plus 2,300 AFY of groundwater and 140 AFY of recycled water. The remaining dry years are based on the same assumptions for groundwater and recycled water, plus an assumption of contract water supply availability equaling 2030 total potable demands.
22,053
22,053
22,053
DWR NOTES: Supplier may use multiple versions of Submittal Table 7-1 R if different water sources have different base years and the supplier chooses to report the base years for each water source separately. If a Supplier uses multiple versions of Submittal Table 7-1 R, in the "Note" section of each submittal table, state that multiple versions of Submittal Table 7-1 R are being used and identify the particular water source that is being reported in each submittal table.
Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table reports the units of measure reported in Submittal Table 2-3.
% of Average Supply
Average Year 100%
Single-Dry Year
Consecutive Dry Years 1st Year
Consecutive Dry Years 2nd Year
Consecutive Dry Years 3rd Year
Consecutive Dry Years 4th Year
Consecutive Dry Years 5th Year
OPTIONAL Submittal Table 7-1 Wholesale: Basis of Water Year Data (Reliability Assessment) Available Supplies if
Year Type Repeats
Check the box if quantification of available supplies is not compatible with this table and is provided elsewhere in the UWMP.
Location: [insert location from UWMP]
Volume Available (AF)
NOTES:
DWR NOTES: Supplier may use multiple versions of Submittal Table 7-1 W if different water sources have different base years and the supplier chooses to report the base years for each water source separately. If a Supplier uses multiple versions of Submittal Table 7-1 W, in the "Note" section of each submittal table, state that multiple versions of Submittal Table 7-1 W are being used and identify the particular water source that is being reported in each submittal table.
Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table reports the unit of measure selected in Submittal Table 2-3.
Quantification of available supplies is provided in this table as either volume only, percent only, or both.
Year Type
Base Year
If not using a calendar
year, type in the last
year of the fiscal,
water year, or range of
years, for example,
water year 2024-2025,
use 2025
2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 (AF)
Supply totals
(autofill from Submittal Table 6-
9 R)
31,540 32,340 33,340 33,340 33,340 2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 (AF) 2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 (AF) Use totals
(autofill from Submittal Table 4-
2 R)
19,753 20,061 20,453 20,905 21,403
Supply totals
(autofill from Submittal Table
6-9 R)
31,400 32,200 33,200 33,200 33,200
Supply totals
(autofill from Submittal Table
6-9 R)
140 140 140 140 140
Surplus/(shortfall) 11,787 12,279 12,887 12,435 11,937
Use totals
(autofill from Submittal Table
4-2 R)
19,613 19,921 20,313 20,765 21,263
Use totals
(autofill from Submittal Table
4-2 R)
140 140 140 140 140
Surplus/(shortfall) 11,787 12,279 12,887 12,435 11,937 Surplus/(shortfall) 0 0 0 0 0 WSCP - supply augmentation
benefit
WSCP - use reduction savings
benefit
WSCP - supply augmentation
benefit
WSCP - supply augmentation
benefit
Revised Surplus/(shortfall) WSCP - use reduction savings benefit
WSCP - use reduction savings
benefit
Revised Surplus/(shortfall) Revised Surplus/(shortfall) If you choose to fill these optional tables, please paste the combined information in the submittal table to the left.
OPTIONAL Submittal Table 7-2 Retail: Normal Year Supply and Use Comparison - POTABLE OPTIONAL Planned WSCP Actions
NOTES:
OPTIONAL Submittal Table 7-2 Retail: Normal Year Supply and Use Comparison -
NON-POTABLE
OPTIONAL Planned WSCP Actions
NOTES:
10635. (a) Every urban water supplier shall include, as part of its urban water management plan, an assessment of the reliability of its water service to its customers during normal, dry, and multiple dry water years. This water supply and demand assessment shall compare the total water supply sources available to the water supplier with the long-term total projected water use over the next 20 years, in five-year increments, for a normal OPTIONAL Planned WSCP Actions
Submittal Table 7-2 Retail: Normal Year Supply and Use Comparison Water Code Section 10635 (a)
NOTES:
DWR NOTES : Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
Supply totals
(autofill from Submittal Table 6-
9 W)
0 0 0 0 0
Use totals
(see OPTIONAL Submittal Table
4-2 W)
Supply totals
(autofill from Submittal Table 6-
9 W)
0 0 0 0 0
Supply totals
(autofill from Submittal Table 6-
9 W)
0 0 0 0 0
Surplus/(shortfall) 0 0 0 0 0
Use totals
(see OPTIONAL Submittal Table
4-2 W)
Use totals
(see OPTIONAL Submittal Table
4-2 W)
Surplus/(shortfall) 0 0 0 0 0 Surplus/(shortfall) 0 0 0 0 0 WSCP - supply augmentation
benefit
WSCP - use reduction savings
benefit
WSCP - supply augmentation
benefit
WSCP - supply augmentation
benefit
Revised Surplus/(shortfall) WSCP - use reduction savings benefit
WSCP - use reduction savings
benefit
Revised Surplus/(shortfall) Revised Surplus/(shortfall) Submittal Table 7-2 Wholesale: Normal Year Supply and Use Comparison Water Code Section 10635 (a)
OPTIONAL Planned WSCP Actions
OPTIONAL Submittal Table 7-2 Wholesale: Normal Year Supply and Use Comparison -
POTABLE
If you choose to fill these optional tables, please paste the combined information in the submittal table to the left.
OPTIONAL Submittal Table 7-2 Wholesale: Normal Year Supply and Use Comparison - NON-POTABLE2030 (AF)
2030 (AF) 2030 (AF)
2035 (AF)
2035 (AF) 2035 (AF)
2040 (AF)
2040 (AF) 2040 (AF)
NOTES:
DWR NOTES : Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
OPTIONAL Planned WSCP Actions
NOTES
OPTIONAL Planned WSCP Actions
NOTES
2045 (AF)
2045 (AF) 2045 (AF)
2050 (AF)
2050 (AF) 2050 (AF)
Supply totals 22,053 23,161 24,553 25,005 25,503
Use totals 19,753 20,061 20,453 20,905 21,403 Supply totals 21,913 23,021 24,413 24,865 25,363 Supply totals 140 140 140 140 140 Surplus/(shortfall) 2,300 3,100 4,100 4,100 4,100 Use totals 19,613 19,921 20,313 20,765 21,263 Use totals 140 140 140 140 140 Surplus/(shortfall) 2,300 3,100 4,100 4,100 4,100 Surplus/(shortfall) 0 0 0 0 0 WSCP - supply
augmentation benefit
WSCP - use reduction
savings benefit
WSCP - supply
augmentation benefit
WSCP - supply
augmentation benefit
Revised Surplus/(shortfall) WSCP - use reduction
savings benefit
WSCP - use reduction
savings benefit
Revised Surplus/(shortfall) Revised Surplus/(shortfall) 2035 (AF) 2040 (AF) 2045 (AF) 2050 (AF)
2050 (AF)
2035 (AF) 2040 (AF) 2045 (AF) 2050 (AF)
DWR NOTES : Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
NOTES
10635. (a) Every urban water supplier shall include, as part of its urban water management plan, an assessment of the reliability of its water service to its customers during normal, dry, and multiple dry water years. This water supply and demand assessment shall compare the total water supply sources available to the water supplier with the long-term total projected water use over the next 20 years, in five-year increments, for a normal water year, a single dry water year, and a drought lasting five consecutive water years.
DWR NOTES : Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
NOTES DWR NOTES : Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
NOTES
Submittal Table 7-3 Retail: Single Dry Year Supply and Use Comparison Water Code Section 10635(a)
OPTIONAL Planned WSCP Actions
OPTIONAL Submittal Table 7-3 Retail: Single Dry Year Supply and Use Comparison - POTABLE
OPTIONAL Planned WSCP Actions
If you choose to fill these optional tables, please paste the combined information in the submittal table to the left.
OPTIONAL Submittal Table 7-3 Retail: Single Dry Year Supply and Use Comparison - NON-POTABLE
OPTIONAL Planned WSCP Actions
2030 (AF)
2030 (AF) 2030 (AF)
2035 (AF) 2040 (AF) 2045 (AF)
2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 (AF)
Supply totals 2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 (AF) 2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 (AF) Use totals Supply totals Supply totals
Surplus/(shortfall) Use totals Use totals
Surplus/(shortfall) Surplus/(shortfall)
WSCP - supply
augmentation benefit
WSCP - use reduction
savings benefit
WSCP - supply
augmentation benefit
WSCP - supply
augmentation benefit
Revised
Surplus/(shortfall)
WSCP - use reduction
savings benefit
WSCP - use reduction
savings benefit
Revised
Surplus/(shortfall)
Revised
Surplus/(shortfall)
NOTES:NOTES:
NOTES:
OPTIONAL Planned WSCP Actions
Submittal Table 7-3 Wholesale: Single Dry Year Supply and Use Comparison Water Code Section 10635(a)
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
OPTIONAL Submittal Table 7-3 Wholesale: Single Dry Year Supply and Use Comparison - POTABLE
OPTIONAL Planned WSCP Actions
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
If you choose to fill these optional tables, please paste the combined information in the submittal table to the left.
OPTIONAL Submittal Table 7-3 Wholesale: Single Dry Year Supply and Use Comparison - NON-POTABLE
OPTIONAL Planned WSCP Actions
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
2030 (AF)2035 (AF)2040 (AF)2045 (AF)2050 (AF)
Supply totals 22,053 23,161 24,553 25,005 25,503 2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 (AF) 2030 (AF)2035 (AF)2040 (AF)2045 (AF)2050 (AF) Use totals 19,753 20,061 20,453 20,905 21,403 Supply totals 21,913 23,021 24,413 24,865 25,363 Supply totals 140 140 140 140 140 Surplus/(shortfall) 2,300 3,100 4,100 4,100 4,100 Use totals 19,613 19,921 20,313 20,765 21,263 Use totals 140 140 140 140 140 Surplus/(shortfall) 2,300 3,100 4,100 4,100 4,100 Surplus/(shortfall) 0 0 0 0 0 WSCP - supply augmentation benefit
WSCP - use reduction savings benefit WSCP - supply augmentation benefit WSCP - supply augmentation benefit Revised Surplus/(shortfall) WSCP - use reduction savings benefit WSCP - use reduction savings benefit Supply totals 22,053 23,161 24,553 25,005 25,503 Revised Surplus/(shortfall) Revised Surplus/(shortfall) Use totals 19,753 20,061 20,453 20,905 21,403 Supply totals 21,913 23,021 24,413 24,865 25,363 Supply totals 140 140 140 140 140 Surplus/(shortfall) 2,300 3,100 4,100 4,100 4,100 Use totals 19,613 19,921 20,313 20,765 21,263 Use totals 140 140 140 140 140 Surplus/(shortfall) 2,300 3,100 4,100 4,100 4,100 Surplus/(shortfall) 0 0 0 0 0 WSCP - supply augmentation benefit
WSCP - use reduction savings benefit WSCP - supply augmentation benefit WSCP - supply augmentation benefit Revised Surplus/(shortfall) WSCP - use reduction savings benefit WSCP - use reduction savings benefit Supply totals 22,053 23,161 24,553 25,005 25,503 Revised Surplus/(shortfall) Revised Surplus/(shortfall) Use totals 19,753 20,061 20,453 20,905 21,403 Supply totals 21,913 23,021 24,413 24,865 25,363 Supply totals 140 140 140 140 140 Surplus/(shortfall) 2,300 3,100 4,100 4,100 4,100 Use totals 19,613 19,921 20,313 20,765 21,263 Use totals 140 140 140 140 140 Surplus/(shortfall) 2,300 3,100 4,100 4,100 4,100 Surplus/(shortfall) 0 0 0 0 0 WSCP - supply augmentation benefit
WSCP - use reduction savings benefit WSCP - supply augmentation benefit WSCP - supply augmentation benefit Revised Surplus/(shortfall) WSCP - use reduction savings benefit WSCP - use reduction savings benefit Supply totals 22,053 23,161 24,553 25,005 25,503 Revised Surplus/(shortfall) Revised Surplus/(shortfall) Use totals 19,753 20,061 20,453 20,905 21,403 Supply totals 21,913 23,021 24,413 24,865 25,363 Supply totals 140 140 140 140 140 Surplus/(shortfall) 2,300 3,100 4,100 4,100 4,100 Use totals 19,613 19,921 20,313 20,765 21,263 Use totals 140 140 140 140 140 Surplus/(shortfall) 2,300 3,100 4,100 4,100 4,100 Surplus/(shortfall) 0 0 0 0 0 WSCP - supply augmentation benefit
WSCP - use reduction savings benefit WSCP - supply augmentation benefit WSCP - supply augmentation benefit Revised Surplus/(shortfall) WSCP - use reduction savings benefit WSCP - use reduction savings benefit Supply totals 22,053 23,161 24,553 25,005 25,503 Revised Surplus/(shortfall) Revised Surplus/(shortfall) Use totals 19,753 20,061 20,453 20,905 21,403 Supply totals 21,913 23,021 24,413 24,865 25,363 Supply totals 140 140 140 140 140 Surplus/(shortfall) 2,300 3,100 4,100 4,100 4,100 Use totals 19,613 19,921 20,313 20,765 21,263 Use totals 140 140 140 140 140 Surplus/(shortfall) 2,300 3,100 4,100 4,100 4,100 Surplus/(shortfall) 0 0 0 0 0 WSCP - supply augmentation benefit
WSCP - use reduction savings benefit WSCP - supply augmentation benefit WSCP - supply augmentation benefit Revised Surplus/(shortfall) WSCP - use reduction savings benefit WSCP - use reduction savings benefit Revised Surplus/(shortfall) Revised Surplus/(shortfall) DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
NOTES:
Second
year OPTIONAL WSCP Actions
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
NOTES:
Third
year OPTIONAL Planned WSCP Actions
Fourth
year OPTIONAL Planned WSCP Actions
Fifth
year
OPTIONAL Planned WSCP Actions
Submittal Table 7-4 Retail: Multiple Dry Years Supply and Use Comparison Water Code Section 10635(a)
OPTIONAL Planned WSCP Actions
If you choose to fill these optional tables, please paste the combined information in the submittal table to the left.
OPTIONAL Submittal Table 7-4 Retail: Multiple Dry Years Supply and Use Comparison - NON-POTABLE First year OPTIONAL Planned WSCP Actions
Third year
Fifth year
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
OPTIONAL Planned WSCP Actions
OPTIONAL Planned WSCP Actions
OPTIONAL Planned WSCP ActionsFourth year
NOTES:
10635. (a) Every urban water supplier shall include, as part of its urban water management plan, an assessment of the reliability of its water service to its customers during normal, dry, and multiple dry water years. This water supply and demand assessment shall compare the total water supply sources available to the water supplier with the long-term total projected water use over the next 20 years, in five-year increments, for a normal water year, a single dry water OPTIONAL Submittal Table 7-4 Retail: Multiple Dry Years Supply and Use Comparison - POTABLE First year OPTIONAL Planned WSCP Actions
First year
Second
year OPTIONAL WSCP Actions
Third
year OPTIONAL Planned WSCP Actions
Fourth
year OPTIONAL Planned WSCP Actions
Fifth
year
OPTIONAL Planned WSCP Actions
OPTIONAL WSCP Actions Second year
Supply totals
Use totals Supply totals Supply totals
Surplus/(shortfall) 0 0 0 0 0 Use totals Use totals
Surplus/(shortfall) 0 0 0 0 0 Surplus/(shortfall) 0 0 0 0 0 WSCP - supply augmentation benefit
WSCP - use reduction savings benefit WSCP - supply augmentation benefit WSCP - supply augmentation benefit Revised Surplus/(shortfall) WSCP - use reduction savings benefit WSCP - use reduction savings benefit Supply totals Revised Surplus/(shortfall) Revised Surplus/(shortfall) Use totals Supply totals Supply totals
Surplus/(shortfall) 0 0 0 0 0 Use totals Use totals
Surplus/(shortfall) 0 0 0 0 0 Surplus/(shortfall) 0 0 0 0 0 WSCP - supply augmentation benefit
WSCP - use reduction savings benefit WSCP - supply augmentation benefit WSCP - supply augmentation benefit Revised Surplus/(shortfall) WSCP - use reduction savings benefit WSCP - use reduction savings benefit Supply totals Revised Surplus/(shortfall) Revised Surplus/(shortfall) Use totals Supply totals Supply totals
Surplus/(shortfall) 0 0 0 0 0 Use totals Use totals
Surplus/(shortfall) 0 0 0 0 0 Surplus/(shortfall) 0 0 0 0 0 WSCP - supply augmentation benefit
WSCP - use reduction savings benefit WSCP - supply augmentation benefit WSCP - supply augmentation benefit Revised Surplus/(shortfall) WSCP - use reduction savings benefit WSCP - use reduction savings benefit Supply totals Revised Surplus/(shortfall) Revised Surplus/(shortfall) Use totals Supply totals Supply totals
Surplus/(shortfall) 0 0 0 0 0 Use totals Use totals
Surplus/(shortfall) 0 0 0 0 0 Surplus/(shortfall) 0 0 0 0 0 WSCP - supply augmentation benefit
WSCP - use reduction savings benefit WSCP - supply augmentation benefit WSCP - supply augmentation benefit Revised Surplus/(shortfall) WSCP - use reduction savings benefit WSCP - use reduction savings benefit Supply totals Revised Surplus/(shortfall) Revised Surplus/(shortfall) Use totals Supply totals Supply totals
Surplus/(shortfall) 0 0 0 0 0 Use totals Use totals
Surplus/(shortfall) 0 0 0 0 0 Surplus/(shortfall) 0 0 0 0 0 WSCP - supply augmentation benefit
WSCP - use reduction savings benefit WSCP - supply augmentation benefit WSCP - supply augmentation benefit Revised Surplus/(shortfall) WSCP - use reduction savings benefit WSCP - use reduction savings benefit Revised Surplus/(shortfall) Revised Surplus/(shortfall) 2045 (AF) 2050 (AF)
2030 (AF)2035 (AF)2040 (AF)2045 (AF)2050 (AF)
2045 (AF) 2050 (AF) 2030 (AF) 2035 (AF) 2040 (AF)
NOTES:
OPTIONAL Submittal Table 7-4 Wholesale: Multiple Dry Years Supply and Use Comparison - NON-POTABLE First year OPTIONAL Planned WSCP Actions
Second
year OPTIONAL Planned WSCP Actions
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-
3. NOTES:
Third year OPTIONAL Planned WSCP Actions
Fourth year OPTIONAL Planned WSCP Actions
Fifth year OPTIONAL Planned WSCP ActionsOPTIONAL Planned WSCP Actions Submittal Table 7-4 Wholesale: Multiple Dry Years Supply and Use Comparison Water Code Section 10635(a)
OPTIONAL Planned WSCP ActionsFirst year
Second
year
OPTIONAL Submittal Table 7-4 Wholesale: Multiple Dry Years Supply and Use Comparison - POTABLE First year OPTIONAL Planned WSCP Actions
Second
year OPTIONAL Planned WSCP Actions
If you choose to fill these optional tables, please paste the combined information in the submittal table to the left.
OPTIONAL Planned WSCP Actions
2030 (AF) 2035 (AF) 2040 (AF)
Fifth year
NOTES:
Third year OPTIONAL Planned WSCP Actions
OPTIONAL Planned WSCP Actions
OPTIONAL Planned WSCP Actions
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
Fourth year
Fifth year
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-
3. Third year OPTIONAL Planned WSCP Actions
Fourth year OPTIONAL Planned WSCP Actions
2026 Total
Total Water Use (AF)17,800 2026 Total 2026 Total
Total Supplies (AF) 17,801 Total Water Use (AF)17,660 Total Water Use (AF) 140 Surplus/Shortfall w/o WSCP Action1 Total Supplies (AF) 17,661 Total Supplies (AF) 140 Surplus/Shortfall w/o WSCP Action 1 Surplus/Shortfall w/o WSCP Action 0 WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF) WSCP - supply augmentation benefit (AF) WSCP - supply augmentation benefit (AF) Revised Surplus/(shortfall) WSCP - use reduction savings benefit (AF) WSCP - use reduction savings benefit (AF) 2027 Total Revised Surplus/(shortfall) Revised Surplus/(shortfall) Total Water Use (AF)18,288 2027 Total 2027 Total
Total Supplies (AF) 18,289 Total Water Use (AF)18,148 Total Water Use (AF) 140 Surplus/Shortfall w/o WSCP Action 1 Total Supplies (AF) 18,149 Total Supplies (AF) 140 Surplus/Shortfall w/o WSCP Action 1 Surplus/Shortfall w/o WSCP Action 0 WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF) WSCP - supply augmentation benefit (AF) WSCP - supply augmentation benefit (AF) Revised Surplus/(shortfall) WSCP - use reduction savings benefit (AF) WSCP - use reduction savings benefit (AF) 2028 Total Revised Surplus/(shortfall) Revised Surplus/(shortfall) Total Water Use (AF)18,777 2028 Total 2028 Total
Total Supplies (AF) 18,777 Total Water Use (AF)18,637 Total Water Use (AF) 140 Surplus/Shortfall w/o WSCP Action0 Total Supplies (AF) 18,637 Total Supplies (AF) 140 Surplus/Shortfall w/o WSCP Action 0 Surplus/Shortfall w/o WSCP Action 0 WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF) WSCP - supply augmentation benefit (AF) WSCP - supply augmentation benefit (AF) Revised Surplus/(shortfall) WSCP - use reduction savings benefit (AF) WSCP - use reduction savings benefit (AF) 2029 Total Revised Surplus/(shortfall) Revised Surplus/(shortfall) Total Water Use (AF)19,265 2029 Total 2029 Total
Total Supplies (AF) 19,266 Total Water Use (AF)19,125 Total Water Use (AF) 140 Surplus/Shortfall w/o WSCP Action 1 Total Supplies (AF) 19,126 Total Supplies (AF) 140 Surplus/Shortfall w/o WSCP Action 1 Surplus/Shortfall w/o WSCP Action 0 WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF) WSCP - supply augmentation benefit (AF) WSCP - supply augmentation benefit (AF) Revised Surplus/(shortfall) WSCP - use reduction savings benefit (AF) WSCP - use reduction savings benefit (AF) 2030 Total Revised Surplus/(shortfall) Revised Surplus/(shortfall) Total Water Use (AF)19,753 2030 Total 2030 Total
Total Supplies (AF) 19,754 Total Water Use (AF)19,613 Total Water Use (AF) 140 Surplus/Shortfall w/o WSCP Action1 Total Supplies (AF) 19,614 Total Supplies (AF) 140 Surplus/Shortfall w/o WSCP Action 1 Surplus/Shortfall w/o WSCP Action 0 WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF) WSCP - supply augmentation benefit (AF) WSCP - supply augmentation benefit (AF) Revised Surplus/(shortfall) WSCP - use reduction savings benefit (AF) WSCP - use reduction savings benefit (AF) Revised Surplus/(shortfall) Revised Surplus/(shortfall) 10635 (b) Every urban water supplier shall
include, as part of its urban water management
plan, a drought risk assessment for its water
service... The drought risk assessment shall
include each of the following:
(1) A description of the data, methodology, and
basis for one or more supply shortage conditions
that are necessary to conduct a drought risk
assessment for a drought period that lasts five
consecutive water years, starting from the year
following when the assessment is conducted.
(2) A determination of the reliability of each source
of supply under a variety of water shortage
conditions. This may include a determination that a
particular source of water supply is fully reliable
under most, if not all, conditions.
(3) A comparison of the total water supply sources
available to the water supplier with the total
projected water use for the drought period.
(4) Considerations of the historical drought
hydrology, ...
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) NOTES:
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
Submittal Table 7-5 Retail: Five-Year Drought Risk Assessment Water Code Section 10635(b)(3)
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation)
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation)
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation)
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation)
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation)
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) If you choose to fill these optional tables, please paste the combined information in the submittal table to the left.
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
NOTES:
OPTIONAL Submittal Table 7-5 Retail: Five-Year Drought Risk Assessment - OPTIONAL Submittal Table 7-5 Retail: Five-Year Drought Risk Assessment - OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
NOTES:
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation)OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) 2026 Total
Total Water Use (AF) 2026 Total 2026 Total
Total Supplies (AF) Total Water Use (AF) Total Water Use (AF) Surplus/Shortfall w/o WSCP Action 0 Total Supplies (AF) Total Supplies (AF) Surplus/Shortfall w/o WSCP Action 0 Surplus/Shortfall w/o WSCP Action 0 WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF) WSCP - supply augmentation benefit (AF) WSCP - supply augmentation benefit (AF) Revised Surplus/(shortfall) WSCP - use reduction savings benefit (AF) WSCP - use reduction savings benefit (AF) 2027 Total Revised Surplus/(shortfall) Revised Surplus/(shortfall) Total Water Use (AF) 2027 Total 2027 Total
Total Supplies (AF) Total Water Use (AF) Total Water Use (AF) Surplus/Shortfall w/o WSCP Action 0 Total Supplies (AF) Total Supplies (AF) Surplus/Shortfall w/o WSCP Action 0 Surplus/Shortfall w/o WSCP Action 0 WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF) WSCP - supply augmentation benefit (AF) WSCP - supply augmentation benefit (AF) Revised Surplus/(shortfall) WSCP - use reduction savings benefit (AF) WSCP - use reduction savings benefit (AF) 2028 Total Revised Surplus/(shortfall) Revised Surplus/(shortfall) Total Water Use (AF) 2028 Total 2028 Total
Total Supplies (AF) Total Water Use (AF) Total Water Use (AF) Surplus/Shortfall w/o WSCP Action 0 Total Supplies (AF) Total Supplies (AF) Surplus/Shortfall w/o WSCP Action 0 Surplus/Shortfall w/o WSCP Action 0 WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF) WSCP - supply augmentation benefit (AF) WSCP - supply augmentation benefit (AF) Revised Surplus/(shortfall) WSCP - use reduction savings benefit (AF) WSCP - use reduction savings benefit (AF) 2029 Total Revised Surplus/(shortfall) Revised Surplus/(shortfall) Total Water Use (AF) 2029 Total 2029 Total
Total Supplies (AF) Total Water Use (AF) Total Water Use (AF) Surplus/Shortfall w/o WSCP Action 0 Total Supplies (AF) Total Supplies (AF) Surplus/Shortfall w/o WSCP Action 0 Surplus/Shortfall w/o WSCP Action 0 WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF) WSCP - supply augmentation benefit (AF) WSCP - supply augmentation benefit (AF) Revised Surplus/(shortfall) WSCP - use reduction savings benefit (AF) WSCP - use reduction savings benefit (AF) 2030 Total Revised Surplus/(shortfall) Revised Surplus/(shortfall) Total Water Use (AF) 2030 Total 2030 Total
Total Supplies (AF) Total Water Use (AF) Total Water Use (AF) Surplus/Shortfall w/o WSCP Action 0 Total Supplies (AF) Total Supplies (AF) Surplus/Shortfall w/o WSCP Action 0 Surplus/Shortfall w/o WSCP Action 0 WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF) WSCP - supply augmentation benefit (AF) WSCP - supply augmentation benefit (AF) Revised Surplus/(shortfall) WSCP - use reduction savings benefit (AF) WSCP - use reduction savings benefit (AF) Revised Surplus/(shortfall) Revised Surplus/(shortfall) 10635 (b) Every urban water supplier shall
include, as part of its urban water management
plan, a drought risk assessment for its water
service... The drought risk assessment shall
include each of the following:
(1) A description of the data, methodology, and basis
for one or more supply shortage conditions that are
necessary to conduct a drought risk assessment for a
drought period that lasts five consecutive water
years, starting from the year following when the
assessment is conducted.
(3) A comparison of the total water supply sources
available to
the water supplier with the total projected water
use for the
drought period.
(4) Considerations of the historical drought
hydrology, ...
(2) A determination of the reliability of each source
of supply under a variety of water shortage
conditions. This may include a determination that a
particular source of water supply is fully reliable
under most, if not all, conditions.
(3) A comparison of the total water supply sources
available to the water supplier with the total
projected water use for the drought period.
Submittal Table 7-5 Wholesale: Five-Year Drought Risk
Assessment
Water Code Section 10635(b)(3)
OPTIONAL Submittal Table 7-5 Wholesale: Five-Year Drought Risk OPTIONAL Submittal Table 7-5 Wholesale: Five-Year Drought Risk If you choose to fill these optional tables, please paste the combined information in the submittal table to the left.
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) NOTES: NOTES:
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout NOTES:
Standard
Shortage
Levels
Percent
Shortage Range
Suppliers
Shortage
Levels
Percent
Shortage Range
1 Up to 10% 1 Up to 10%
2 Up to 20% 2 & 3 Up to 15% (2)
Up to 20% (3)
3 Up to 30% 4 & 5 Up to 25% (4)
Up to 30% (5)
4 Up to 40% 6 Up to 40%
5 Up to 50% 7 Up to 50%
6 >50% 8 >50%
(B) An urban water supplier with an existing water shortage contingency plan that uses different water shortage levels may comply with the requirement in subparagaph (A) by developing and including a cross-reference relating its existing categores to the six standard water shortage levels.
Submittal Table 8-1: Cross-reference for Standard vs
Supplier Shortage Levels
Water Code Section 10632(a)(3)(B)
Check the box if the Supplier uses the Standard
six levels of water shortage.
Proceed to the next table.
NOTES: (a) Stage 1 is voluntary
10632 (a) Every urban water supplier shall prepare and adopt a water shortage contingency plan as part of its urban water management plan that consists of each of the following elements:
(3)(A)Six standard water shortage levels corresponding to progressive ranges of up to 10, 20, 30, 40, and 50 percent shortages and greater than 50 percent shortage. Urban water suppliers shall define these shortage levels based on the suppliers’ water supply conditions, including percentage reductions in water supply, changes in groundwater levels, changes in surface elevation or level of subsidence, or other changes in hydrological or other local conditions indicative of the water supply available for use. Shortage levels shall also apply to catastrophic interruption of water supplies, including, but not limited to, a regional power outage, an earthquake, and other potential emergency events.
No
Volume or
Percentage
Drop down
Shortage Gap
Reduction Value
(May be a range) (AF)
Any Other Actions (describe) Volume 2,300
In non-irrigation months, production wells
can be activated as emergency augmented
water supply in the case of
catastrophic/sudden water supply reduction.
(E) For each action, an estimate of the extent to which the gap between supplies and demand will be reduced by implementation of the action.
Submittal Table 8-2 Retail: Supply Augmentation and Other Actions Water Code Section 10632(a)(4)(A),(C) and (E)
Add additional rows as needed
NOTES:
Is the Supplier completing this table using the standard six levels? (yes/no) 10632(a)(4) Shortage response actions that align with the defined shortage levels and include, at a minimum, all of the following:
(A) Locally appropriate supply augmentation actions.
(C) Locally appropriate operational changes.
How much is this going to reduce the
shortage gap?
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
Shortage
Level
Supply Augmentation Methods and
Other Actions by Water Supplier
Drop down list
These are the only categories that will be
accepted by the WUEdata online submittal tool
Additional Explanation or Reference
(OPTIONAL)
Volume or
Percentage
Drop down
Shortage Gap
Reduction Value
(May be a range) (AF)
Submittal Table 8-2 Wholesale: Supply Augmentation and Other Actions Water Code Section 10632(a)(4)(A),(C) and (E)
Is the Supplier completing this table using the standard six levels? (yes/no) How much is this going to reduce the shortage
gap?
Add additional rows as needed
Shortage
Level
Supply Augmentation Methods and Other
Actions by Water Supplier
Drop down list
These are the only categories that will be accepted by the WUEdata online submittal tool
Additional Explanation or Reference
(OPTIONAL)
10632(a)(4) Shortage response actions that align with the defined shortage levels and include, at a minimum, all of the following:
(A) Locally appropriate supply augmentation actions.
(C) Locally appropriate operational changes.
(E) For each action, an estimate of the extent to which the gap between supplies and demand will be reduced by implementation of the action.
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
NOTES:
No
Volume or Percentage
Drop down
Shortage Gap
Reduction Value
(May be a range) (AF)
1 Expand Public Information Campaign Percentage 15-20% Based on community response to calls for reductions over the past 30 years No
1 Offer Water Use Surveys Percentage <0.5% Always offered. Expect increase in participation.
Water savings based on 2014-2016 drought No
1 Provide Rebates on Plumbing Fixtures
and Devices Percentage <0.5% Always offered. Expect increase in participation.
Water savings based on 2014-2016 drought No
1 Provide Rebates for Landscape
Irrigation Efficiency Percentage <0.5% Always offered. Expect increase in participation.
Water savings based on 2014-2016 drought No
1 Provide Rebates for Turf Replacement Percentage <0.5% Always offered. Expect increase in participation.
Water savings based on 2014-2016 drought No
1 Decrease Line Flushing Percentage <0.5% Average total annual flushing is approximately 0.5% of total water. No
1 Increase Water Waste Patrols Percentage <0.5% Includes all water waste enforcement efforts. Yes 1 Landscape - Restrict or prohibit runoff
from landscape irrigation Percentage <0.5% Always prohibited (Water Waste Ord). Yes 1 Other - Customers must repair leaks,
breaks, and malfunctions in a timely
manner
Percentage <0.5% Always prohibited (Water Waste Ord). Yes 1 Other - Require automatic shut of
hoses Percentage <0.5% Required for garden and utility hoses Yes 1 Other - Prohibit use of potable water
for washing hard surfaces Percentage <0.5% Prohibit hosing off hard surfaces. Yes 2 Expand Public Information Campaign Percentage 15-20% Based on community response to calls for reductions over the past 30 years No
2 Other Percentage 1-3% Combined savings for actions continued from previous stage Yes
2 Implement or Modify Drought Rate
Structure or Surcharge Percentage 1-5% Water Shortage Charge (5% of customer usage rates) Yes 2 CII - Restaurants may only serve water
upon request Percentage <0.5% Yes
2 CII - Lodging establishment must offer
opt out of linen service Percentage <0.5% Yes
3 Expand Public Information Campaign Percentage 15-20% Based on community response to calls for reductions over the past 30 years No
3 Other Percentage 1-3% Combined savings for actions continued from previous stages Yes
3 Implement or Modify Drought Rate
Structure or Surcharge Percentage 5-7% Water Shortage Charge (7.5% of customer usage rates) Yes
3 Other - Prohibit use of potable water
for washing hard surfaces Percentage 0-5% Prohibit use of potable water for pressure washing. Yes 3 Landscape - Limit landscape irrigation
to specific times Percentage 0-15% Irrigation limited to 8 PM to 6 AM. Savings varies based on time of year/season Yes
4 Expand Public Information Campaign Percentage 15-20% Based on community response to calls for reductions over the past 30 years No
4 Other Percentage 3-5% Combined savings for actions continued from previous stages Yes
4 Implement or Modify Drought Rate
Structure or Surcharge Percentage 7-10% Water Shortage Charge (10% of customer usage rates) Yes
4 Water Features - Restrict water use for
decorative water features, such as
fountains
Percentage <0.5% Prohibit operation of ornamental fountains and water features Yes
5 Expand Public Information Campaign Percentage 15-20% Based on community response to calls for reductions over the past 30 years No
5 Other Percentage 3-5% Combined savings for actions continued from previous stages Yes
5 Implement or Modify Drought Rate
Structure or Surcharge Percentage 10-15% Water Shortage Charge (15% of customer usage rates) Yes
5 Implement or Modify Drought Rate
Structure or Surcharge Percentage 5-10% Water Allocations in effect and enforced by Excess Use Penalty Yes
5 Other water feature or swimming pool
restriction Percentage <0.5% Prohibit filling of new pools/spas Yes 5 Other - Prohibit use of potable water
for construction and dust controlPercentage <0.5% Require use of recycled water if available and filling station within one‑mile radius Yes
5 Moratorium or Net Zero Demand
Increase on New Connections Percentage 0-1% New construction must offset demand by 1:1 ratio Yes 6 Expand Public Information Campaign Percentage 15-20% Based on community response to calls for reductions over the past 30 years No
6 Other Percentage 3-5% Combined savings for actions continued from previous stages Yes
6 Implement or Modify Drought Rate
Structure or Surcharge Percentage 15-20% Water Shortage Charge (25% of customer usage rates) Yes
6 Implement or Modify Drought Rate
Structure or Surcharge Percentage 10-15% Water Allocations in effect and enforced by Excess Use Penalty Yes
6 Other water feature or swimming pool
restriction Percentage <0.5% Prohibit filling or topping off existing pools/spas Yes 6 Landscape - Prohibit certain types of
landscape irrigation Percentage <0.5% Prohibit installation of water‑using landscape at new construction Yes
7 Expand Public Information Campaign Percentage 15-20% Based on community response to calls for reductions over the past 30 years No
7 Other Percentage 3-5% Combined savings for actions continued from previous stages Yes
7 Implement or Modify Drought Rate
Structure or Surcharge Percentage 15-20% Water Shortage Charge (35% of customer usage rates) Yes
7 Implement or Modify Drought Rate
Structure or Surcharge Percentage 20-25% Water Allocations in effect and enforced by Excess Use Penalty Yes
7 Landscape - Prohibit certain types of
landscape irrigation Percentage <0.5% Prohibit installation or replanting of any water‑using landscape Yes
8 Expand Public Information Campaign Percentage 15-20% Based on community response to calls for reductions over the past 30 years No
8 Other Percentage 3-5% Combined savings for actions continued from previous stages Yes
8 Implement or Modify Drought Rate
Structure or Surcharge Percentage 15-20% Water Shortage Charge (45% of customer usage rates) Yes
8 Implement or Modify Drought Rate
Structure or Surcharge Percentage 20-25% Water Allocations in effect and enforced by Excess Use Penalty Yes
8 Landscape - Prohibit all landscape
irrigation Percentage 0-20% Savings varies based on time of year/season Yes (D) Additional, mandatory prohibitions against specific water use practices that are in addition to state-mandated prohibitions and appropriate to the local conditions. (E) For each action, an estimate of the extent to which the gap between supplies and demand will be reduced by implementation of the action.
Is the Supplier completing this table using the standard six levels? (yes/no) Submittal Table 8-3 Retail: Demand Reduction Actions
Water Code Section 10632(a)(4)(B),(D), and (E)
Add additional rows as needed
How much is this going to reduce the shortage
gap?
10632(a)(4) Shortage response actions that align with the defined shortage levels and include, at a minimum, all of the following:
(B) Locally appropriate demand reduction actions to adequately respond to shortages.
Shortage
Level
Demand Reduction Actions
Drop down list
These are the only categories that will be
accepted by the WUEdata online submittal
tool. Select those that apply.
Additional Explanation or Reference
(OPTIONAL)
NOTES:
Penalty, Charge, or
Other
Enforcement?
For Retail Suppliers Only
Drop Down List
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
Volume or Percentage
Drop down
Shortage Gap
Reduction Value
(May be a range) (AF)
(E) For each action, an estimate of the extent to which the gap between supplies and demand will be reduced by implementation of the action. (B) Locally appropriate demand reduction actions to adequately respond to shortages.
Submittal Table 8-3 Wholesale: Demand Reduction Actions Water Code Section 10632(a)(4)(B) and (E)
Add additional rows as needed
NOTES:
10632(a)(4) Shortage response actions that align with the defined shortage levels and include, at a minimum, all of the following:
Is the Supplier completing this table using the standard six levels? (yes/no) How much is this going to reduce the shortage
gap?
Shortage Level
Demand Reduction Actions
Drop down list
These are the only categories that will
be accepted by the WUEdata online
submittal tool. Select those that
apply.
Additional Explanation or
Reference
(OPTIONAL)
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
City Name 60 Day Notice
Drop Down (yes/no)
Notice of Public
Hearing
Drop Down (yes/no)
City of Cotai Yes Yes
City of Petaluma Yes Yes
City of Rohnert Park Yes Yes
City of Sebastopol Yes Yes
City of Sonoma Yes Yes
Town of Windsor Yes Yes
County Name
Drop Down List
60 Day Notice
Drop Down (yes/no)
Notice of Public
Hearing
Drop Down (yes/no)
Sonoma County Yes Yes
CWC 10642 The water supplier is to provide the time and place of the hearing to any city or county within which the supplier provides water.
CWC 10621 (b)Notify at least 60 days prior to the public hearing any city or county within which the supplier provides water that the urban water supplier will be reviewing the plan and considering amendments or changes to the plan.
Submittal Table 10-1 Retail: Notification to Cities and Counties Water Code Section 10621(b) and 10642
Add additional rows as needed
Add additional rows as needed
NOTES:
City Name 60 Day Notice
Drop Down (yes/no)
Notice of Public Hearing
Drop Down (yes/no)
County Name
Drop Down List
60 Day Notice
Drop Down (yes/no)
Notice of Public Hearing
Drop Down (yes/no)
CWC 10621 (b)Notify at least 60 days prior to the public hearing any city or county within which the supplier provides water that the urban water supplier will be reviewing the plan and considering amendments or changes to the plan.
CWC 10642 The water supplier is to provide the time and place of the hearing to any city or county within which the supplier provides water.
Add additional rows as needed
NOTES:
Submittal Table 10-1 Wholesale: Notification to Cities and Counties Water Code Section 10621(b) and 10642
Check the box if the Supplier has notified more than 10 cities or counties.
Completion of the table below is not required. Provide a separate list of the cities and counties that were notified.
Provide the page or location of this list in the UWMP.
Check the box if the Supplier has notified 10 or fewer cities or counties.
Complete the table below.
Add additional rows as needed
YesNo UseTypesR UseTypesW Disposal Treatment Recycled UsesR Recycled Water UsesW WWTF Name and Place ID 2025 Recycled Deliveries Brine Discharge PWSID PWS_NAME Yes Single Family Sales to other agencies Ocean outf all Secondary , Undisinf ected Agricultural irrigation Sent to Another Supplier (Prov ide name optional) 4-S Ranch WRF, Place ID 202611 Agricultural irrigation Sewer CA3610001 ADELANTO, CITY OF No Multi-Family Transf ers to other agencies Riv er or creek outf all Secondary , Disinf ected - 23Landscape irrigation (exc golf courses) Agricultural irrigation A.K. Warren Water Resource Facility, Place ID 234156 Landscape irrigation (exc golf courses) Brine Line CA0110001 ALAMEDA COUNTY WATER DISTRICT Not Applicable Commercial Exchanges to other agencies Bay or estuary outf all Secondary , Disinf ected - 2.2Golf course irrigation Industrial reuse Acton Rehabilitation Center, Place ID 207053 Golf course irrigation ZLD CA2710001 ALCO WATER SERVICE Industrial Groundwater recharge Lake outf all Tertiary Commercial use Geothermal and other energy production Adelanto WWTP, Place ID 204475 Commercial use Evaporation Pond CA1910001 CITY OF ALHAMBRA Groundwater Institutional/Gov ernmental Saline water intrusion barrier Wetlands Advanced Industrial use Seawater intrusion barrier Adin CSD, Place ID 204486 Industrial use Other (describe in notes section) CA0310002 AWA, IONE Alluvial Basin Landscape Agricultural Subsurf ace inf iltration gallery Direct Potable Reuse Geothermal and other energy production Recreational impoundment Airforce Research Lab STP, Place ID 204763 Geothermal and other energy production CA0310003 AWA, TANNER Fractured Rock Saline water intrusion barrier Wetlands or wildlif e habitat (optional) Land disposal Seawater intrusion barrier Wetlands or wildlif e habitat Alamitos Barrier Recycled Water Project/Leo J. Vander Lans Water Treatment Fac., Place ID 629209Wetlands or wildlif e habitat CA0310012 AWA BUCKHORN PLANT Groundwater recharge Incidental Retail Use Percolation ponds SOURCE WATER TYPE Recreational impoundment Groundwater recharge (IPR) Alan Horton WWTP, Place ID 204870 Other (Description Required) CA0310019 AWA LA MEL HEIGHTS #3 YearType Agricultural Distribution Sy stem Water Loss Deep injection well Groundwater Wetlands or wildlif e habitat Reserv oir water augmentation (IPR) Alturas Municipal WWTP, Place ID 205325 CA0310021 AWA - CAMANCHE VILLAGE Average Year Wetlands or wildlif e habitat (optional) Other (optional) Other Seawater Groundwater recharge (IPR) Direct potable reuse (DPR) Amador City WW Export System, Place ID 205396 2025 Recycled Water Long Term Storage CA2810005 AMERICAN CANYON, CITY OF Single-Dry Year Sales/Transf ers/Exchanges to other Suppliers Brackish Surface Water Reserv oir water augmentation (IPR) Other (Description Required) Amador County Regional Outfall, Place ID 205398 Seawater intrusion barrier CA3010001 CITY OF ANAHEIM Multi-Dry Year Distribution Sy stem Water Loss Direct potable reuse (DPR) American Canyon Water Reclamation Facility (WRF) (formerly WWTP), Place ID 205477Underground Storage CA4510001 CITY OF ANDERSON All Year Types Other (optional) BRINE DISCHARGE Other (Description Required) American Valley WWTP, Place ID 846487 Surface reservoir Storage CA0710001 CITY OF ANTIOCH Average and Single-Dry Year Desalination Agency Anaheim Water Recycling Demonstration Project, Place ID 774666 CA3610003 LIBERTY UTILITIES (AV RANCHOS) CORP.
Average and Multi-Dry Year Sewer INTAKE TYPE Antioch Anderson WPCP, Place ID 205741 CA1910003 CITY OF ARCADIA Single-Dry and Multi-Dry Year Brine Line Open-water intake (screened or unscreened) Arcadia Water Treatment Plant Angels City WWTP, Place ID 205793 CA1210001 ARCATA, CITY OF ZLD Slant Well Arlington Basin Groundwater Desalter Project Arbuckle WWTP, Place ID 206149 CA1210021 JACOBY CREEK CSD Units for Water Loss Standard Evaporation Pond Vertical Well Bev erly Hills Desalter Arcata City WWTF, Place ID 206164 CA4010001 ARROYO GRANDE, WATER DEPARTMENT Gallons per Service Connection
per Day (GPSCD)
Other (describe in notes section) C. Marv in Brewer Desalter Armona CSD WWTF, Place ID 206355 CA1510001 ARVIN COMMUNITY SERVICES DIST Gallons per Mile per Day (GPMD) Carlsbad Seawater Desalination Facility Arnold WWTP, Place ID 206381 CA4010002 ATASCADERO MUTUAL WATER CO Charles Mey er Desalination Plant Arvin WWTF, Place ID 273104 CA2410001 CITY OF ATWATER County List Demand Reduction Supplies Regional UWMPs Chino Desalter I Atascadero State Hospital, Place ID 206651 CA1910007 AZUSA LIGHT AND WATER WaterType Alameda County Expand Public Inf ormation Campaign Purchased or Imported Water Antelope Valley IRUWMP Chino Desalter II Atascadero WWTP, Place ID 206653 CA1510031 BAKERSFIELD, CITY OF Potable Alpine County Improv e Customer Billing Supply f rom Storage SupplyAug Castaic Lake Water Agency Desert Center Maintenance Station Atwater Regional WWTF, Place ID 747519 CA1010001 BAKMAN WATER COMPANY Non-Potable Amador County Increase Frequency of Meter Reading Groundwater (not desalinated) Expand Public Information Campaign
Hollister Urban Area UWMP GREAT Program Groundwater Desalination Facility (Blending Station No. 1)Auburn WWTP, Place ID 206733 CA3310006 BANNING, CITY OF Butte County Of f er Water Use Surv ey s Surf ace water (not desalinated) Improve Customer Billing Inland Empire Utilities Agency Irv ine Potable Treatment Plant Avalon WWTF, Place ID 208276 CA1510038 BEAR VALLEY CSD Calaveras County Prov ide Rebates on Plumbing Fixtures and Dev ices Recy cled Water Implement or Modify Drought Rate Structure or Surcharge
Kern County - North of River Regional Plan Menif ee Basin Desalter Avenal WWTF, Place ID 273160 CA3310002 BEAUMONT CHERRY VALLEY WD Metered Colusa County Prov ide Rebates f or Landscape Irrigation Ef f iciency Desalinated Water - Groundwater Transfers Modesto Joint Plan Mocho Groundwater Demineralization Plant Avila WWTP, Place ID 206888 CA4510014 BELLA VISTA WATER DISTRICT Metered Contra Costa County Prov ide Rebates f or Turf Replacement Desalinated Water - Surf ace Water Exchanges San Bernardino Valley Municipal Water District Morro Bay Desalination Facility (Groundwater Unit) Bailey Creek WWTF, Place ID 208536 CA1910013 BELLFLOWER - SOMERSET MWC Estimated Del Norte County Decrease Line Flushing Stormwater Other Purchases Suburban Water Systems Newark Desalination Facility Baker WTF, Place ID 208572 CA4810001 CITY OF BENICIA El Dorado County Reduce Sy stem Water Loss Transf ers New Recycled Water Santa Ana River Watershed North Pleasant Valley Groundwater Desalter Bakersfield WWTP #2, Place ID 273208 CA1910156 BEVERLY HILLS-CITY, WATER DEPT.
CityCounty Fresno County Increase Water Waste Patrols Exchanges Rain Seeding Tehachapi Regional Plan Oceanside Mission Basin Brackish Groundwater Desalter Bakersfield WWTP #3, Place ID 273209 CA3610008 BIG BEAR CITY CSD City Glenn County Moratorium or Net Zero Demand Increase on New Connections Other (optional) Stored Emergency Supply Other Perris I Desalter Banning STP-Non NPDES, Place ID 208668 CA3600283 DEPARTMENT OF WATER AND POWER County Humboldt County Implement or Modif y Drought Rate Structure or Surcharge Other Actions (describe) Perris II Desalter BARRET COVE Recreation Area, Place ID 208746 CA3600395 BIG BEAR SHORES RV RESORT Imperial County Landscape - Restrict or prohibit runof f f rom landscape irrigation Enforcement Regional Alliances Port Hueneme Water Agency Desalter/Brackish Water Reclamation Demonstration Facility Barstow Wastewater Treatment Plant, Place ID 208769 CA3610022 DWP - FAWNSKIN Units of Measure Inyo County Landscape - Limit landscape irrigation to specif ic times Penalty CalWater San Francisco Bay Alliance Richard A. Rey nolds (Lower Sweetwater) Groundwater Desalination FacilityBarstow/Daggett Airport WTF, Place ID 208771 CA3610044 BIG BEAR LAKE DWP - BIG BEAR SYSTEM AF Kern County Landscape - Limit landscape irrigation to specif ic day s Other enforcement CalWater Central Coast Alliance Robert W. Goldsworthy Desalter Facility BB Reg WWA-Lucerne Vly, Place ID 208930 CA3310003 BLYTHE - CITY OF CCF Kings County Landscape - Prohibit certain ty pes of landscape irrigation Incentive CalWater South Coast Alliance Round Mountain Water Treatment Plant Beach Wastewater Treatment Facility, Place ID 252771 CA1310001 BRAWLEY, CITY OF MG Lake County Landscape - Prohibit all landscape irrigation None CalWater Sacramento River Alliance San Juan Capistrano Groundwater Recov ery Plant (Desalter) Beale AFB WWTP, Place ID 209007 CA3010002 CITY OF BREA Lassen County Landscape - Other landscape restriction or prohibition CalWater Tulare Lake Alliance Sand City Desalination Project Bear Valley CSD WWTF, Place ID 273161 CA0710004 BRENTWOOD YesNo Los Angeles County CII - Lodging establishment must of f er opt out of linen serv ice Contra Costa Water District Alliance South Coast Water District Groundwater Recov ery Facility (GRF)Bear Valley MHP WTF, Place ID 209031 CA3010003 CITY OF BUENA PARK Yes Madera County CII - Restaurants may only serv e water upon request Gateway Regional Alliance Temescal Basin Desalter Bear Valley WWTF, Place ID 209035 CA1910179 BURBANK-CITY, WATER DEPT.
No Marin County CII - Commercial kitchens required to use pre-rinse spray v alv es Hollister Urban Area Alliance Tustin 17th Street Desalter Treatment Plant Beaumont WWTP No. 1, Place ID 259170 CA4110003 CITY OF BURLINGAME Not Applicable Mariposa County CII - Other CII restriction or prohibition Inland Empire Utilities Agency Alliance Wells 21 and 22 Desalter Benicia WWTP, Place ID 209253 CA0510004 CCWD - SHEEP RANCH Mendocino County
Water Features - Restrict water use f or decorativ e water f eatures, such as f ountains North Marin-Sonoma Alliance Other Bieber STP, Place ID 209473 CA0510005 CCWD - WEST POINT Merced County Pools and Spas - Require cov ers f or pools and spas Olivenhain Regional Alliance Big Bear WWRF, Place ID 259181 CA0510006 CCWD - JENNY LIND 3 Year Average Modoc County
Pools - Allow f illing of swimming pools only when an appropriate cov er is in place. Orange County 20x2020 Regional Alliance Big Creek Powerhouse No 1 WWTF, Place ID 209509 CA0510016 CCWD - EBBETTS PASS Current Year Real Water Loss Mono County Other water f eature or swimming pool restriction Tehachapi Regional Alliance Big Pine Indian RES WTF, Place ID 209527 CA0510017 CCWD - COPPER COVE Monterey County
Other - Customers must repair leaks, breaks, and malf unctions in a timely manner West Basin Municipal Water District Alliance Big Pine STP, Place ID 209528 CA0510019 CCWD - WALLACE Individual Target Napa County Other - Require automatic shut of hoses Other (provide name in "Notes" field) Biola WWTF, Place ID 273163 CA1310002 CALEXICO, CITY OF Regional Alliance Target Nevada County Other - Prohibit use of potable water f or construction and dust control Bishop Creek Camp Ground WTF, Place ID 209655 CA1910052 CAL/AM WATER COMPANY - BALDWIN HILLS Orange County Other - Prohibit use of potable water f or washing hard surf aces Bishop Sewage Treatment Plant, Place ID 209662 CA1910139 CAL/AM WATER COMPANY - SAN MARINO Placer County
Other - Prohibit v ehicle washing except at f acilities using recy cled or recirculating water BKK Leachate Treatment Plant, Place ID 238163 CA1910186 CAL-AM WATER COMPANY - DUARTE Shortage Levels Plumas County Other Blue Lake City POTW, Place ID 209801 CA2701202 CAL AM WATER COMPANY - CHUALAR Level 1 Riverside County Blythe Regional WW Reclamation Facilities, Place ID 209847 CA2701257 CAL AM WATER COMPANY - GARRAPATA Level 2 Sacramento County Bodega Bay Wastewater Reclamation Facility, Place ID 209949 CA2702004 CAL AM WATER COMPANY - RALPH LANE Level 3 San Benito County Bohemian Grove, Place ID 602220 CA2710004 CAL AM WATER COMPANY - MONTEREY Level 4 San Bernardino County Bolinas Community Public Utility District Water Recycling Facility, Place ID 208952 CA2710006 CAL AM WATER COMPANY - AMBLER PARK Level 5 San Diego County Bolinas Community WWTP Pond System, Place ID 209987 CA2710021 CAL AM WATER COMPANY - TORO Level 6 San Francisco County Bombay Beach STP, Place ID 209999 CA2710022 CAL AM WATER COMPANY - HIDDEN HILLS San Joaquin County Boron STP, Place ID 210082 CA3110150 CAL AM - WEST PLACER Units: Table 8-2/8-3 San Luis Obispo County Borrego WD-Ram's Hill, Place ID 210088 CA3410010 CAL AM - SUBURBAN ROSEMONT Volume San Mateo County Boulder Creek Golf & Cntry Club WWTP, Place ID 210116 CA3410012 CAL AM - ISLETON Percentage Santa Barbara County Brawley City WWTP, Place ID 210272 CA3410013 CAL AM - LINCOLN OAKS Santa Clara County Brentwood WWTP, Place ID 210322 CA3410017 CAL AM - PARKWAY Santa Cruz County Bridgeport PUD Treatment Plant, Place ID 210365 CA3410027 CAL AM - SECURITY PARK Shasta County Buellton WWTP, Place ID 210685 CA3410031 CAL AM - ANTELOPE Sierra County Burbank WRP, Place ID 212135 CA3410045 CAL AM - ARDEN Siskiyou County Burlingame WWTP, Place ID 210839 CA3410047 CAL AM - WALNUT GROVE Solano County Burney STP, Place ID 210854 CA5700712 CAL AM - DUNNIGAN Sonoma County Buttonwillow WWTF, Place ID 273164 CA3410023 CAL AM - FRUITRIDGE VISTA Stanislaus County Byron Sanitary District WWTF, Place ID 210972 CA3710001 CAL-AM WATER CORONADO Sutter County Cachuma Lake Recreation Area WWTP, Place ID 212455 CA5610040 CAL AMERICAN WATER CO Tehama County Calaveras Timber Trails WWTF & Disposal Facility, Place ID 213002 CA5610081 CAL AMERICAN WC - LAS POSAS ESTATES Trinity County Calera Creek Water Recycling Plant, Place ID 212585 CA1510032 CALIFORNIA CITY, CITY OF Tulare County Calexico City WWTP, Place ID 212589 CA1510003 CWS - BAKERSFIELD Tuolumne County Calico Ghost Town REC Fac WTF, Place ID 212603 CA1510055 CWS - NORTH GARDEN Ventura County California City WTF, Place ID 212648 CA4110006 CALIFORNIA WATER SERVICE - BEAR GULCH Yolo County California Men's Colony WWTP, Place ID 212681 CA0410002 CAL-WATER SERVICE CO.-CHICO Yuba County California Utilities, Place ID 212424 CA1110002 CAL-WATER SERVICE CO.-HAMILTON CITY Calipatria City WWTP, Place ID 212739 CA4810002 CALIFORNIA WATER SERVICE CO. - DIXON Calistoga City Dunaweal WWTP, Place ID 212750 CA1910033 CALIFORNIA WATER SERVICE CO. - DOMINGUEZ Calpella CWD WWTP, Place ID 212776 CA1910036 CALIFORNIA WATER SERVICE CO. - ELA Camanche North Shore WWTP, Place ID 212847 CA1910134 CALIFORNIA WATER SERVICE CO. - HERM/REDO Camanche South Shore WWTP, Place ID 212853 CA1500407 CWS-SPLIT MOUNTAIN WATER SYSTEM Camarillo WRP, Place ID 216719 CA1510026 CWS - UPPER BODFISH WATER SYSTEM Cambria CSD WWTP, Place ID 212858 CA1510033 CWS - KERNVILLE Cambria Emergency Water Supply Facility, Place ID 809684 CA1510039 CWS SOUTHLAKE SYSTEM Camino Heights WWTP, Place ID 212899 CA1510043 CWS-ONYX WATER SYSTEM Camrosa Water Reclamation Facility, Place ID 216832 CA1510049 CWS - LAKELAND Canada Woods Reclamation Facility, Place ID 213029 CA1510056 CWS - LOWER BODFISH WATER SYSTEM Carlsbad WRF, Place ID 213270 CA0110003 CALIFORNIA WATER SERVICE - LIVERMORE Carmel Reclamation, Place ID 213561 CA4310001 CWSC LOS ALTOS SUBURBAN Carmel Valley Ranch WWTP (Producer), Place ID 213294 CA5810001 CAL-WATER SERVICE CO.-MARYSVILLE Carneros Inn WWTP & Recycled Water, Place ID 213313 CA0410005 CAL-WATER SERVICE CO.-OROVILLE Carpinteria SD WWTP, Place ID 213332 CA1910104 CALIFORNIA WATER SERVICE CO. - PALOS VER Caruthers WWTF, Place ID 726877 CA2701929 COUNTRY MEADOWS MWC Casa De Amigos MHP, Place ID 213404 CA2710010 CWSC SALINAS Casa De Fruta, Place ID 213407 CA2710012 CWSC SALINAS HILLS Cascade Shores WWTP, Place ID 213432 CA2710013 CWSC LAS LOMAS Cayucos SD WWTP, Place ID 824400 CA2710019 CWSC OAK HILLS CCC @ Susanville, CSP-LC WTF, Place ID 213580 CA4110007 CALIFORNIA WATER SERVICE - SAN CARLOS CDC CCWF & VSP WWTF, Place ID 213592 CA4110008 CALIFORNIA WATER SERVICE - SAN MATEO CDC Pelican Bay Prison WWTP, Place ID 213596 CA1010024 CWS - SELMA CDCR - Mule Creek State Prison WWTP, Place ID 241842 CA4110009 CALIFORNIA WATER SERVICE-S SAN FRANCISCO Cedar Grove WWTF, Place ID 213791 CA3910001 CALIFORNIA WATER SERVICE - STOCKTON Central Contra Costa SD WWTP, Place ID 213875 CA5400935 CWS - MULLEN WATER COMPANY Central Marin San. Agcy. WWTP, Place ID 213889 CA5410016 CWS - VISALIA Ceres WWTP, Place ID 213947 CA5410041 CWS - TULCO WATER COMPANY Chester STP, Place ID 214199 CA5610016 CALIFORNIA WATER SERVICE CO - WESTLAKE Chico Mobile Country Club WWTP, Place ID 214327 CA5610019 CAMARILLO WATER DEPT Chico Water Pollution Control Plant, Place ID 271805 CA4010014 CAMBRIA COMM SERVICES DIST Chowchilla WWTF, Place ID 273106 CA5610063 CAMROSA WATER DISTRICT Chualar Wastewater Treatment Plant, Place ID 241305 CA3710005 CARLSBAD MWD Cielo Vista Estates, Place ID 214526 CA3410004 CARMICHAEL WATER DISTRICT CIM WWTP, Place ID 259185 CA4210001 CARPINTERIA VALLEY WATER DISTRICT Circle Oaks WWTF, Place ID 214559 CA5610014 OJAI WATER SYSTEM City of Biggs WWTP, Place ID 209551 CA5610024 CASITAS MUNICIPAL WATER DIST City of Colfax WWTP, Place ID 215106 CA5010028 CERES, CITY OF City of Colusa WWTP, Place ID 215225 CA1910019 CERRITOS - CITY, WATER DEPT.
City of Corning WWTP, Place ID 215750 CA3610012 CHINO, CITY OF City of Davis WWTP, Place ID 219223 CA3610036 CHINO HILLS, CITY OF City of Jackson WWTP, Place ID 214642 CA3410006 CITRUS HEIGHTS WATER DISTRICT City of Lathrop Consolidated Treatment Facility, Place ID 271781 CA4910002 CLOVERDALE, CITY OF City of Livermore Water Reclamation Plant, Place ID 237195 CA1010003 CITY OF CLOVIS City of Loyalton and Grandi Ranch WWTF, Place ID 214650 CA3310007 COACHELLA WATER AUTHORITY City of Manteca WW Quality Control Facility, Place ID 239343 CA3310001 COACHELLA VWD: COVE COMMUNITY City of Modesto WQCF, Place ID 241146 CA3310048 COACHELLA VWD: I.D. NO. 8 City of Morro Bay Water Reclamation Facility, Place ID 882248 CA1010004 COALINGA-CITY City of Newman Wastewater Treatment Facility, Place ID 244250 CA4110011 COASTSIDE COUNTY WATER DISTRICT City of Pacific Grove, Place ID 826844 CA3610014 COLTON, CITY OF City of Patterson WQCF, Place ID 247782 CA1910026 COMPTON-CITY, WATER DEPT.
City of Pinole WWTP, Place ID 217831 CA0710003 CONTRA COSTA WATER DISTRICT City of San Clemente Segunda Deshecha Runoff Plant, Place ID 792221 CA1610004 CORCORAN, CITY OF City of San Clemente WRP, Place ID 255218 CA3310037 CORONA, CITY OF City of Santa Maria WWTP, Place ID 255678 CA1910127 COVINA-CITY, WATER DEPT.
City of Tulare Wastewater Treatment Facility, Place ID 872487 CA0810001 CITY OF CRESCENT CITY City of Wheatland WWTP, Place ID 214671 CA1910028 CRESCENTA VALLEY CWD Civita Water Reclamation Facility, Place ID 849194 CA3610015 CRESTLINE VILLAGE CWD - DIVISION 10 Clear Creek WWTP, Place ID 214802 CA3610018 CUCAMONGA VALLEY WATER DISTRICT Clearlake Oaks Co WTR Dis WWTP, Place ID 214812 CA4110013 CITY OF DALY CITY Clover Creek WWTF, Place ID 214873 CA5710001 CITY OF DAVIS Cloverdale City WWTP, Place ID 214888 CA0410011 DEL ORO WATER CO.-PARADISE PINES Clovis WWTF, Place ID 214899 CA1510005 DELANO, CITY OF
Coachella Valley WD WWTP, Place ID 216446 CA3310005 DESERT WATER AGENCY Coalinga State Hospital WWTF, Place ID 214957 CA0710007 DIABLO WATER DISTRICT Coalinga WWTF, Place ID 273107 CA5410002 DINUBA, CITY OF Colton/San Bernadino STP, RIX, Place ID 259178 CA0710009 TOWN OF DISCOVERY BAY Convict Lake Campground WTF, Place ID 215611 CA1910034 DOWNEY - CITY, WATER DEPT.
Copper Cove WWRF, Place ID 255003 CA0110009 DUBLIN SAN RAMON SERVICES DISTRICT Corcoran State Prison WWTF, Place ID 215698 CA0110005 EAST BAY MUD Corcoran WWTF, Place ID 273108 CA1510006 EAST NILES CSD Corona WWRF #1, Place ID 259171 CA4110024 CITY OF EAST PALO ALTO Corona WWRF #2, Place ID 259173 CA3610064 EAST VALLEY WATER DISTRICT Corona WWRF #3, Place ID 259174 CA3310009 EASTERN MUNICIPAL WD Costanoa Lodge and Camp, Place ID 215859 CA1310004 EL CENTRO, CITY OF Cottonwood WWTP, Place ID 215903 CA0910001 EL DORADO ID - MAIN Coulterville WWTF, Place ID 215910 CA0910017 EL DORADO ID - STRAWBERRY Country Club Estates ? SLO Co CSA-18, Place ID 215915 CA0910018 EL DORADO ID - OUTINGDALE Covelo POTW, Place ID 215966 CA1910038 EL MONTE-CITY, WATER DEPT.
Crescent City WWTP, Place ID 216106 CA1910040 EL SEGUNDO-CITY, WATER DEPT.
Crestline SD Three WTF's, Place ID 216135 CA3010079 EL TORO WATER DISTRICT CSA 15 - STP, Place ID 216283 CA3410008 ELK GROVE WATER SERVICE CSA 3-Lake Camanche WWTP, Place ID 216284 CA3310012 ELSINORE VALLEY MWD Cutler-Orosi WWTF, Place ID 273166 CA3710006 ESCONDIDO, CITY OF Cuyama CSD WWTP, Place ID 216428 CA4110021 ESTERO MUNICIPAL IMPROVEMENT DISTRICT CVWD Improv Dist #58, Place ID 216445 CA1210004 EUREKA, CITY OF Cypress Ridge Sewer Facility, Place ID 216491 CA5410003 EXETER, CITY OF Davenport WWTP, Place ID 219169 CA3410009 FAIR OAKS WATER DISTRICT DDJC, Tracy - WWTP, Stormwater, Place ID 219280 CA4810003 CITY OF FAIRFIELD Deer Creek WWTP, Place ID 219398 CA3710008 FALLBROOK PUD Del Rey WWTF, Place ID 273167 CA5610002 FILLMORE WATER DEPT Delano WWTF, Place ID 273109 CA3410014 FOLSOM, CITY OF - MAIN Delhi WWTF, Place ID 273168 CA3410030 FOLSOM, CITY OF - ASHLAND Delleker WWTP, Place ID 219530 CA1210006 FORTUNA, CITY OF Delta Diablo WWTP, Place ID 219552 CA3010069 CITY OF FOUNTAIN VALLEY Descanso Gardens (Upgrade), Place ID 861161 CA1010007 CITY OF FRESNO Desert Crest WWTP, Place ID 219649 CA3010010 CITY OF FULLERTON Desert Lake CSD WTF, Place ID 219661 CA3410011 GALT, CITY OF Desert Water Agency Recycled Water Facility, Place ID 220932 CA3010062 CITY OF GARDEN GROVE Deuel Vocational Institution, Place ID 219701 CA0910013 GEORGETOWN DIVIDE PUD Dinuba WWTF, Place ID 273110 CA4310004 CITY OF GILROY
Discovery Bay WWTP, Place ID 220315 CA1910043 GLENDALE-CITY, WATER DEPT.
Dixon WWTF, Place ID 220396 CA1910044 GLENDORA-CITY, WATER DEPT.
Don Pedro Sewer Zone 1, Place ID 220495 CA1910004 GSWC - ARTESIA Donald C. Tillman WWRP, Place ID 267571 CA3610043 GOLDEN STATE WATER CO - BARSTOW Donner Summit PUD WWTP, Place ID 220548 CA0710002 GOLDEN STATE WATER COMPANY - BAY POINT Dorris City STP, Place ID 220567 CA1910011 GSWC - BELL, BELL GARDENS Dos Palos WWTF, Place ID 273111 CA1910024 GSWC - CLAREMONT Douglas Flat/Vallecito WWTP, Place ID 220618 CA3410015 GOLDEN STATE WATER CO. - CORDOVA Dublin San Ramon SD WWTP, Place ID 220792 CA1910030 GSWC - CULVER CITY Dunsmuir WWTP, Place ID 220850 CA1910077 GSWC - FLORENCE/GRAHAM DVNM HDQ Furnace Creek WWTF, Place ID 220928 CA1910098 GSWC - NORWALK Earlimart WWTF, Place ID 273169 CA4210016 GOLDEN STATE WATER COMPANY - ORCUTT Easterly WWTP, Place ID 222057 CA3010035 GOLDEN STATE WC - PLACENTIA/YORBA LINDA Eastern Sierra CSD WWTF, Place ID 222071 CA1910142 GSWC-SAN DIMAS EBMUD Recycled Water - RARE WTP, Place ID 753205 CA5610059 GOLDEN STATE WATER COMPANY - SIMI VALLEY EBMUD Recycled Water- North Richmond Water Reclamation Plant, Place ID 244392 CA1910212 GSWC-SOUTH ARCADIA EBMUD WPCP, Place ID 222132 CA1910223 GSWC-SOUTH SAN GABRIEL EchoWater Resource Recovery Facility, Place ID 254981 CA1910155 GSWC - SOUTHWEST Edward C. Little Water Recycling Plant (Recycled Water Irrigation), Place ID 273663 CA3010022 GOLDEN STATE WC - WEST ORANGE COUNTY Edward C. Little WRP- West Coast Basin Barrier Project - Expansion Phase III, Place ID 824178 CA4210004 GOLETA WATER DISTRICT Edwards AFB WTF, Place ID 222326 CA4310022 GREAT OAKS WC INC El Centro City WWTP, Place ID 222407 CA2710008 GREENFIELD, CITY OF El Centro-Stdby Basin, Place ID 222412 CA1510024 GREENFIELD COUNTY WD El Dorado Hills WWTP, Place ID 222434 CA5510009 GROVELAND COMMUNITY SERV DIST El Estero Water Resource Center NPDES, Place ID 222443 CA4010004 GROVER BEACH WATER DEPARTMENT El Portal WWTF, Place ID 222491 CA1610003 HANFORD, CITY OF El Toro Water Dist WWRF, Place ID 271777 CA1910047 HAWTHORNE-CITY WATER DEPT.
Encina Water Pollution Control Facility, Place ID 222758 CA0110006 CITY OF HAYWARD Encinal Canyon Water Recycling Plant on Tract 46277, Place ID 268043 CA4910005 HEALDSBURG, CITY OF Escalon Treatment Plant, Place ID 222916 CA3710010 HELIX WATER DISTRICT Esparto CSD WWTF, Place ID 222947 CA3310016 HEMET, CITY OF Etna STP, Place ID 222998 CA3610024 HESPERIA WD
Eureka City Elk River WWTP, Place ID 223010 CA3610073 HI DESERT WD EVMWD Horsethief Canyon WWTP, Place ID 259194 CA4110016 TOWN OF HILLSBOROUGH EVMWD Railroad Canyon WWRF, Place ID 259210 CA3510001 HOLLISTER, CITY OF EVMWD Regional WWRF, Place ID 259214 CA1210009 HUMBOLDT C.S.D.
Exeter WWTF, Place ID 273112 CA3010053 CITY OF HUNTINGTON BEACH Fairbanks Ranch WPCF, Place ID 224057 CA1910049 HUNTINGTON PARK-CITY, WATER DEPT.
Fairfield-Suisun Sewer District Subregional WWTP, Place ID 225526 CA1310006 IMPERIAL, CITY OF Fall River Mills STP, Place ID 224125 CA1510017 INDIAN WELLS VALLEY W.D.
Fallbrook Water Reclamation Plant, Place ID 224137 CA3310020 INDIO WATER AUTHORITY Farmersville WWTF, Place ID 273113 CA1910051 INGLEWOOD- CITY, WATER DEPT.
Ferndale City POTW, Place ID 224348 CA3010092 IRVINE RANCH WATER DISTRICT Fiero Lane Water Company, Inc., Place ID 224429 CA3610025 JOSHUA BASIN WATER DISTRICT Fillmore WWTP and Wastewater Recycling Plant, Place ID 225881 CA3310021 JURUPA COMMUNITY SD Firebaugh WWTF, Place ID 273114 CA1010018 KERMAN, CITY OF Forest Meadows WWT & RP, Place ID 224889 CA1010019 KINGSBURG, CITY OF Forester & Fire Warden Camp 13, Place ID 226148 CA3010018 CITY OF LA HABRA Forestville Water District, Place ID 224901 CA3010100 CITY OF LA PALMA Fort Bragg City WWTP, Place ID 225055 CA1910062 LA VERNE, CITY WD Fort Irwin WTF, Place ID 225068 CA3010017 LAGUNA BEACH COUNTY WD Fort Jones City WWTP, Place ID 225072 CA3610005 LAKE ARROWHEAD CSD Fortuna City WWTP, Place ID 225089 CA3310022 LAKE HEMET MWD Franklin WWTF, Place ID 273170 CA3710013 LAKESIDE WD
Fresno Cnty #30-El Porvenir WWTF, Place ID 201073 CA1910239 LAKEWOOD - CITY, WATER DEPT.
Fresno Cnty #32-Cantua Creek WWTF, Place ID 201075 CA1510012 LAMONT PUBLIC UTILITY DIST Fresno Cnty #34-Millerton New Town WWTF, Place ID 201076 CA1910225 LAS VIRGENES MWD Fresno Cnty #38-Sky Harbour WWTF, Place ID 201078 CA3910015 CITY OF LATHROP Fresno Cnty #41-Shaver Lake WWTF, Place ID 201080 CA3310074 TEMESCAL VALLEY WATER DISTRICT Fresno Cnty #44A-Millerton Lake MHV WWTF, Place ID 201082 CA1610005 LEMOORE, CITY OF Fresno Cnty #44-D Monte Verdi Estates WWTF, Place ID 201081 CA3110004 CITY OF LINCOLN Fresno Cnty #47-Quail Lake WWTF, Place ID 201083 CA1910063 LINCOLN AVENUE WATER CO.
Fresno Cnty Juvenile Justice WWTF, Place ID 234146 CA5810002 LINDA COUNTY WATER DISTRICT Fresno Regional WWTF, Place ID 273115 CA5410006 LINDSAY, CITY OF Furn Crk Inn & Ranch Pack STP, Place ID 225579 CA0110011 CITY OF LIVERMORE Gafner Water Reclamation Facility, Place ID 226637 CA2410004 CITY OF LIVINGSTON Galt WWTP & Reclamation Facility, Place ID 226690 CA3910004 LODI, CITY OF Garberville POTW, Place ID 226719 CA3610013 LOMA LINDA, CITY OF Golden Hills WWTF, Place ID 227503 CA1910073 LOMITA-CITY, WATER DEPT.
Goleta SD WWTP, Place ID 227568 CA4210006 LOMPOC-CITY WATER UTILITY DIV Gonzales WWTP, Place ID 227602 CA1910065 LONG BEACH-CITY, WATER DEPT.
Gorman WWTP, Place ID 229051 CA1910067 LOS ANGELES-CITY, DEPT. OF WATER & POWER Grant Grove WWTF, Place ID 227781 CA1910204 LOS ANGELES CWWD 29 & 80-MALIBU Grass Valley City WWTP, Place ID 227818 CA1910005 LOS ANGELES CWWD 40, REG. 38-LAKE LA Graton CSD, Place ID 256050 CA1910025 LOS ANGELES CWWD 40, REG. 39-ROCK CREEK Grayson Comm Serv Dist WTF, Place ID 227843 CA1910027 LOS ANGELES CWWD 40, REG. 35-N.E. L.A.
Greenfield WWTP, City of, Place ID 227893 CA1910070 LOS ANGELES CWWD 40,REG 4 & 34-LANCASTER Greenstone Estates Mobile Home Park, Place ID 227914 CA1910203 LOS ANGELES CWWD 40, R 24,27,33-PEARBLSM Greenville WW Ponds, Place ID 227918 CA2410005 CITY OF LOS BANOS Grenada Sanitary District STP, Place ID 227962 CA1910079 LYNWOOD-CITY, WATER DEPT.
Grizzly Creek Ranch WWTF, Place ID 228016 CA2010002 CITY OF MADERA Grizzly Ranch CSD, Place ID 228018 CA2610001 MAMMOTH CWD Groundwater Replenishment System - Advanced WTF, Place ID 228046 CA1910083 MANHATTAN BEACH-CITY, WATER DEPT.
Groveland WWTF, Place ID 228057 CA3910005 MANTECA, CITY OF Guadalupe WWTP, Place ID 228104 CA2110002 MARIN MUNICIPAL WATER DISTRICT Gualala WWTF, Place ID 228109 CA2710017 MARINA COAST WATER DISTRICT Gunner Ranch Water Reclamation Plant, Place ID 273147 CA0710006 CITY OF MARTINEZ Gustine WWTF, Place ID 273116 CA1210016 MCKINLEYVILLE C.S.D.
Hale Avenue Resource Recovery Facility (HARRF) Recycled Water, Place ID 229727 CA4110017 MENLO PARK MUNICIPAL WATER Hallelujah Prayer Center USA, Place ID 217620 CA2410009 CITY OF MERCED Hammonton Gold Village WWTP, Place ID 229559 CA3010004 MESA WATER DISTRICT Hanford WWTF, Place ID 273118 CA4110001 MID-PENINSULA WATER DISTRICT Hangtown Creek WRF, Place ID 229595 CA4110018 CITY OF MILLBRAE Happy Camp WWTP, Place ID 229643 CA4310005 CITY OF MILPITAS Harmony Grove Water Reclamation Plant, Place ID 782065 CA3310008 MISSION SPRINGS WD Hayward WPCF, Place ID 229882 CA3310078 WEST PALM SPRINGS VILLAGE Healdsburg City WWTP, Place ID 229922 CA3310081 PALM SPRINGS CREST Heber PUD-Standby Bsn, Place ID 229966 CA5010005 CITY OF MODESTO - SALIDA Helendale Silverlakes STP, Place ID 230011 CA5010010 MODESTO, CITY OF Henry N. Wochholz WWRF, Place ID 259161 CA5010023 CITY OF MODESTO - SOUTH TURLOCK Heritage Ranch WWTP, Place ID 230132 CA5010029 CITY OF MODESTO - DEL RIO Herlong Public Utility District, Place ID 230784 CA5010031 CITY OF MODESTO - WALNUT MANOR Hidden Valley Lake WRF, Place ID 230282 CA5010033 CITY OF MODESTO - GRAYSON Hi-Desert WD Reclamation Facility, Place ID 806008 CA5010034 CITY OF MODESTO - NORTH TURLOCK Hilmar CWD WWTF, Place ID 273141 CA5010035 CITY OF MODESTO - CENTRAL TURLOCK Hilton Creek CSD Package STP, Place ID 230429 CA1910090 MONROVIA-CITY, WATER DEPT.
Hollister Domestic WWTP, Place ID 230555 CA3610029 MONTE VISTA CWD Holtville City WWTP, Place ID 230588 CA1910091 MONTEBELLO LAND & WATER CO.
Hope Gardens Family Center, Place ID 226149 CA4210007 MONTECITO WATER DIST Hopland Public Utilities District, Place ID 230693 CA1910092 MONTEREY PARK-CITY, WATER DEPT.
Horseshoe Bend REC Area, Place ID 230706 CA4310006 CITY OF MORGAN HILL Hughson WWTF, Place ID 230812 CA4010011 MORRO BAY PW DEPT - WATER DIVISION Hume Lake WWTF, Place ID 273148 CA3010073 MOULTON NIGUEL WATER DISTRICT Huron WWTF, Place ID 273119 CA4310007 CITY OF MOUNTAIN VIEW Hyperion WWTP, Place ID 232063 CA3310051 MYOMA DUNES MUTUAL WATER COMPANY I-5 & Highway 58 WWTF, Place ID 273149 CA2810003 NAPA, CITY OF Idyllwild WD WWTP, Place ID 259155 CA2910004 NEVADA ID - E. GEORGE, BANNER MOUNTAIN IEUA Carbon Canyon WWRF, Place ID 259184 CA2910006 NEVADA ID - LOMA RICA Imperial CCD WWTP, Place ID 232259 CA2910014 NEVADA ID - LAKE OF PINES Imperial City WWTP, Place ID 232297 CA2910023 NEVADA ID - LAKE WILDWOOD Imperial Standby Basin, Place ID 232290 CA3110026 NEVADA ID - NORTH AUBURN Independence WWTF, Place ID 232340 CA5810005 NEVADA ID - SMARTSVILLE Indian Springs Reclamation Facility, Place ID 232363 CA5010013 CITY OF NEWMAN-WATER DEPARTMENT Inyokern CSD WTF, Place ID 232625 CA3010023 CITY OF NEWPORT BEACH Ione WWTF, Place ID 214640 CA4010026 NIPOMO COMM SERVICES DIST Ironhouse WWTF, Place ID 232656 CA3310025 NORCO, CITY OF Island Park Recreation Area - Pine Flat Lake, Place ID 707492 CA4110025 NORTH COAST COUNTY WATER DIST Isleton WWTP, Place ID 232721 CA2110003 NORTH MARIN WATER DISTRICT Ivanhoe WWTF, Place ID 273172 CA3110001 NORTH TAHOE PUD - MAIN Jamestown Sanitary District Wastewater Treatment Facilities, Place ID 233460 CA3110023 NORTH TAHOE PUD - CARNELIAN WOODS Jenny Lind Elementary School, Place ID 233610 CA3110036 NORTH TAHOE PUD - DOLLAR COVE JH Ranch, Place ID 805724 CA1910191 NORWALK - CITY, WATER DEPT.
Jose Flores WWTP, Place ID 260486 CA5010014 OAKDALE, CITY OF Julian Water Pollution Facility, Place ID 234117 CA3710014 OCEANSIDE, CITY OF June Lake PUD STP, Place ID 234123 CA1510015 OILDALE MWC Kerman WWTF, Place ID 234841 CA5805001 PLUMAS LAKE
Kern Cnty CSA 39.8-Reeder Tract, Place ID 252277 CA5810003 OLIVEHURST PUBLIC U.D.
Kern Cnty Sheriff's Lerdo WWTF, Place ID 256772 CA3710029 OLIVENHAIN MWD Kern Sanitation Authority WWTF, Place ID 273142 CA3610034 ONTARIO MUNICIPAL UTILITIES COMPANY Kern Valley State Prison WWTF, Place ID 234915 CA3010027 CITY OF ORANGE Kettleman City WWTF, Place ID 273173 CA3410016 ORANGE VALE WATER COMPANY King City Domestic WWTF, Place ID 235021 CA1910101 ORCHARD DALE WATER DISTRICT Klamath CSD STP (Del Norte Community Development), Place ID 235102 CA3710034 OTAY WATER DISTRICT Knights Landing CSD WWTP, Place ID 235144 CA5610007 OXNARD WATER DEPT La Canada WWRP, Place ID 237748 CA3710037 PADRE DAM MWD La Contenta WWT & RF, Place ID 235798 CA1910102 PALMDALE WATER DIST.
La Salina WWTP, Oceanside Ocean Outfall, Place ID 236019 CA4310009 CITY OF PALO ALTO Laguna County Sanitation District Reclamation Plant, Place ID 236124 CA0410007 PARADISE IRRIGATION DISTRICT Lake Arrowhead CSD WTFS, Place ID 236181 CA1910105 PARAMOUNT - CITY, WATER DEPT.
Lake California WWTP, Place ID 236190 CA1910021 LIBERTY UTILITIES - COMPTON Lake Cnty SD Kelseyville WWD No. 3 Kelseyville WWTF, Place ID 736188 CA1910161 LIBERTY UTILITIES - LYNWOOD Lake Hemet MWD WWTP, Place ID 259157 CA1910211 LIBERTY UTILITIES - BELLFLOWER-NORWALK Lake Hughes Community WWTF, Place ID 237922 CA1910124 PASADENA WATER AND POWER Lake of the Pines WWTP, Place ID 236236 CA4010007 PASO ROBLES WATER DEPARTMENT Lake San Antonio Northshore WWTP, Place ID 244646 CA5010017 PATTERSON, CITY OF Lake San Antonio Southshore WWTP, Place ID 236252 CA4910006 PETALUMA, CITY OF Lake Shastina CSD STP, Place ID 236258 CA3610120 PHELAN PINON HILLS CSD Lake Tamarisk WTP, Place ID 236281 CA1910042 PICO RIVERA - CITY, WATER DEPT.
Lake Wildwood WWTP, Place ID 236292 CA1910125 PICO WD
Lakeport City WWTP, Place ID 241869 CA4010008 PISMO BEACH WATER DEPARTMENT Lamont WWTF, Place ID 273174 CA0710008 CITY OF PITTSBURG Lancaster Water Reclamation Plant, Place ID 236378 CA3110005 PLACER CWA - AUBURN/BOWMAN Las Gallinas WWTP, Place ID 236598 CA3110006 PLACER CWA - COLFAX Las Palmas Ranch Reclamation Facility, Place ID 236601 CA3110024 PLACER CWA - ALTA Latham WWP, Place ID 236649 CA3110025 PLACER CWA - FOOTHILL Laton WWTF, Place ID 273175 CA3110040 PLACER CWA - BIANCHI ESTATES Le Grand WWTF, Place ID 273176 CA3110050 PLACER CWA - APPLEGATE Leavitt Lake Sewage Treatment Ponds, Place ID 236765 CA3110124 PLACER CWA - MONTE VISTA Lebec SRRA (Tejon Pass), Place ID 236772 CA0110008 CITY OF PLEASANTON Lee Vining WTF, Place ID 236786 CA1910126 POMONA - CITY, WATER DEPT.
Lemoore NAS WWTF, Place ID 236857 CA5610009 PORT HUENEME WATER DEPT Lemoore WWTF, Place ID 273120 CA5410010 PORTERVILLE, CITY OF Limoneira WWTP, Place ID 238315 CA3710015 POWAY, CITY OF Lincoln City WWTF, Place ID 238365 CA1910130 QUARTZ HILL WATER DIST.
Linda Cnty Water District WWTP, Place ID 237060 CA3710016 RAINBOW MUNICIPAL WD Linden Co Water Dist WWTF, Place ID 237069 CA3710019 RAMONA MUNICIPAL WD Lindsay WWTF, Place ID 273121 CA3310038 RANCHO CALIFORNIA WATER DISTRICT Linnell Farm Labor Center, Place ID 237114 CA5210004 CITY OF RED BLUFF Lion's Gate Reserve, Place ID 237123 CA4510005 CITY OF REDDING Live Oak City WWTP, Place ID 214647 CA3610037 REDLANDS CITY MUD-WATER DIV Livingston Domestic WWTF, Place ID 220469 CA4110022 CITY OF REDWOOD CITY Lockeford CSD WWTP, Place ID 237252 CA1010027 REEDLEY, CITY OF Loleta WWTF, Place ID 237295 CA3610038 RIALTO, CITY OF
Lompoc City Regional Wastewater Reclamation Plant, Place ID 237315 CA3710018 RINCON DEL DIABLO MWD (ID-1) Lompoc Correctional Facility WWTP, Place ID 237312 CA3710044 RINCON DEL DIABLO MWD (ID-A) London WWTF, Place ID 273178 CA3410018 RIO LINDA/ELVERTA COMMUNITY WATER DIST Lone Pine WWTF, Place ID 237325 CA4810004 CITY OF RIO VISTA Long Beach WRP, Place ID 238562 CA3910007 RIPON, CITY OF Lopez Rec Area, Place ID 237366 CA5010018 RIVERBANK, CITY OF Los Alamos WWTP, Place ID 237395 CA3310031 RIVERSIDE, CITY OF Los Angeles-Glendale WWRP, Place ID 235738 CA3610057 RIVERSIDE HIGHLAND WATER COMPANY Los Banos WWTF, Place ID 273122 CA4910014 ROHNERT PARK, CITY OF Los Coyotes WRP, Place ID 238646 CA1510018 ROSAMOND CSD Los Osos Water Recycling Facility, Place ID 822816 CA3110008 CITY OF ROSEVILLE Los Ranchos MHP, Place ID 237459 CA1910194 ROWLAND WATER DISTRICT Lost Hills WWTF, Place ID 273179 CA3310044 RUBIDOUX COMMUNITY SD Lower Moosa Canyon Recl Facil, Place ID 237543 CA1910140 RUBIO CANON LAND & WATER ASSOCIATION Lytle Creek North WWTP, Place ID 643085 CA3610062 RUNNING SPRINGS WATER DISTRICT Lytle Creek WWTP, Place ID 259197 CA3410020 CITY OF SACRAMENTO MAIN Madera Cnty #14-Chukchansi WWTF, Place ID 214483 CA3400101 HOOD WATER MAINTENCE DIST [SWS] Madera Cnty #19-Parkwood WWTF, Place ID 201067 CA3400106 EAST WALNUT GROVE [SWS] Madera Cnty #22A-Oakhurst WWTF, Place ID 201069 CA3400156 SOUTHWEST TRACT W M D [SWS] Madera Cnty #24 Teaford Meadow Lakes WWTF, Place ID 201070 CA3400173 NORTHGATE 880 [SWS] Madera Cnty #27-Goldside Estates WWTF, Place ID 201071 CA3410002 SCWA - ARDEN PARK VISTA Madera Cnty #2-Bass Lake WWTF, Place ID 201068 CA3410029 SCWA - LAGUNA/VINEYARD Madera Cnty #37-La Vina WWTF, Place ID 201077 CA3410704 SCWA MATHER-SUNRISE Madera Cnty #7-Marina View Heights WWTF, Place ID 201087 CA3410001 SACRAMENTO SUBURBAN WATER DISTRICT Madera Cnty #8A-North Fork WWTF, Place ID 201088 CA3610039 SAN BERNARDINO CITY Madera WWTF, Place ID 273123 CA3610121 SBDNO COUNTY SERVICE AREA 64 Madison WWTF, Place ID 239130 CA4110023 CITY OF SAN BRUNO Malaga CWD WWTF, Place ID 273180 CA5610017 VENTURA WATER DEPARTMENT Malibu Bay Club WWTP, Place ID 242135 CA3010036 CITY OF SAN CLEMENTE Malibu Civic Center Wastewater Treatment Facility, Place ID 766648 CA3710020 SAN DIEGO, CITY OF Malibu Mesa WRP, Place ID 242162 CA3710021 SAN DIEGUITO WD Malibu WPCP, Place ID 242186 CA1910143 SAN FERNANDO-CITY, WATER DEPT.
Mammoth CWD STP, Place ID 239283 CA0110012 TOWN OF SUNOL - SFPUC Mammoth Mtn Ski Area WTF, Place ID 239291 CA0110018 SFPUC-PLEASANTON WELLS Manila CSD WWTP, Place ID 239317 CA3810011 SFPUC CITY DISTRIBUTION DIVISION Margaret H Chandler WWRF, Place ID 259220 CA1910144 SAN GABRIEL COUNTY WD Maricopa Wastewater Disposal Facility, Place ID 273124 CA3610041 SAN GABRIEL VALLEY WC - FONTANA Marin CSD 5 - Tiburon WWTP, Place ID 239497 CA1910039 SAN GABRIEL VALLEY WATER CO.-EL MONTE Marin CSD 5 Paradise Cove WWTP, Place ID 239498 CA1910189 SAN GABRIEL VALLEY WATER CO.-MONTEBELLO Mariposa WWTP, Place ID 273207 CA3310032 SAN JACINTO, CITY OF Markleeville Wstwtr Trtmnt Sys, Place ID 239591 CA4310019 CITY OF SAN JOSE - NSJ/ALVISO Maxwell PUD WWTF, Place ID 239874 CA4310020 CITY OF SAN JOSE - EVG/EDV/COY Mayacama Golf Club LLC, Place ID 239889 CA4310011 SAN JOSE WATER McCloud WWTF, Place ID 240000 CA4310018 CITY OF CUPERTINO McClure Pt Rec Area, Place ID 240004 CA3410021 SAN JUAN WATER DISTRICT McFarland WWTF, Place ID 273125 CA4410002 SLVWD - FELTON WATER SYSTEM McKinleyville WWTP, Place ID 240093 CA4410014 SAN LORENZO VALLEY WATER DIST McSwain Rec Area WWTF, Place ID 239947 CA4010009 SAN LUIS OBISPO WATER DEPARTMENT Mendocino City CSD, Place ID 240307 CA1010029 CITY OF SANGER Mendocino County WWD#2-Anchor Bay, Place ID 240318 CA3010038 CITY OF SANTA ANA Mendota WWTF, Place ID 273126 CA4210010 CITY OF SANTA BARBARA WATER DEPARTMENT Merced WWTF, Place ID 214652 CA4310012 CITY OF SANTA CLARA Michelson WWRF, Place ID 259156 CA4410010 SANTA CRUZ WATER DEPARTMENT Middletown STP (SD 2-2), Place ID 240655 CA3710023 SANTA FE I.D.
Millbrae WPCP, Place ID 240791 CA1910245 SANTA FE SPRINGS - CITY, WATER DEPT.
Mineral WWTP, Place ID 240864 CA3010101 SANTA MARGARITA WATER DISTRICT Miranda POTW, Place ID 240917 CA3010030 CITY OF SAN JUAN CAPISTRANO Mission Hills La Purisima WWTP, Place ID 240951 CA4210011 SANTA MARIA WATER DEPARTMENT Moccasin Powerhouse, Place ID 241111 CA1910146 SANTA MONICA-CITY, WATER DIVISION Modesto Reservoir WWTP, Place ID 241143 CA5610011 CITY OF SANTA PAULA Mojave STP, Place ID 241188 CA4910009 SANTA ROSA, CITY OF Mokelumne Hill WWTF, Place ID 241192 CA4410013 SCOTTS VALLEY WATER DISTRICT Montague STP, Place ID 241264 CA3010041 CITY OF SEAL BEACH Montecito SD WWTP, Place ID 241288 CA1510019 SHAFTER, CITY OF Monterey One Water Regional WWTP, Place ID 241740 CA4510006 CITY OF SHASTA LAKE Monterey Regional Reclamation (Producer), Place ID 726996 CA1910148 SIERRA MADRE-CITY, WATER DEPT.
Moorpark WRF - WRR, Place ID 243377 CA1910149 SIGNAL HILL - CITY, WATER DEPT.
Moreno Valley RWRF, Place ID 259203 CA2710011 SOLEDAD, CITY OF Morro Bay/Cayucos WWTP, Place ID 241479 CA4910012 SONOMA, CITY OF Mount Shasta WWTP, Place ID 241800 CA4410017 SOQUEL CREEK WATER DISTRICT Mountain High West Package Plant, Place ID 241774 CA3010042 SOUTH COAST WATER DISTRICT Mountain House WWTP, Place ID 241598 CA0410006 SOUTH FEATHER W&P - MINERS RANCH Mountain of Attn Sanctuary, Place ID 241609 CA0410012 SOUTH FEATHER W&P - BANGOR Mountain View Villas, Place ID 241649 CA1910152 SOUTH GATE-CITY, WATER DEPT.
Mt. View Sanitary District WWTP, Place ID 241815 CA1910154 CITY OF SOUTH PASADENA Murphys WWTF, Place ID 241907 CA0910002 SOUTH TAHOE PUD - MAIN Napa Berryessa WTF, Place ID 243845 CA3910006 STOCKTON EAST WATER DISTRICT Napa Sanitation District WWTP (Soscol Water Recycling Facility), Place ID 243858 CA3910012 CITY OF STOCKTON Nebo Domestic WTF, Place ID 244056 CA1910046 SUBURBAN WATER SYSTEMS-GLENDORA Nevada City School of the Arts WWTF, Place ID 209670 CA1910200 SUBURBAN WATER SYSTEMS-COVINA KNOLLS Nevada City WWTP, Place ID 244141 CA1910205 SUBURBAN WATER SYSTEMS-SAN JOSE New Don Pedro WW Facilities, Place ID 244174 CA1910059 SUBURBAN WATER SYSTEMS-LA MIRADA New Melones Lake Glory Hole Recreation Area, Place ID 227381 CA1910174 SUBURBAN WATER SYSTEMS-WHITTIER New Piru WTF, Place ID 734616 CA4810005 SUISUN-SOLANO WATER AUTHORITY Newell CWD STP, Place ID 244240 CA1910157 SUNNY SLOPE WATER CO.
Niland SD WWTP, Place ID 244348 CA3510003 SUNNYSLOPE COUNTY WATER DIST Nipomo CSD Black Lake - Reclaimed Water Producer, Place ID 244360 CA4310014 CITY OF SUNNYVALE Nipomo CSD Southland Treatment Facility, Place ID 244361 CA1810001 CITY OF SUSANVILLE NORSD Sills Reclamation Project, Place ID 252010 CA3710025 SWEETWATER AUTHORITY North City WRP, Place ID 244506 CA4910004 SWEETWATER SPRINGS CWD - GUERNEVILLE North Fresno WWRF, Place ID 215677 CA4910028 SWEETWATER SPRINGS CWD - MONTE RIO North San Juan WW Facility, Place ID 244565 CA0910012 TAHOE CITY PUD - RUBICON North San Mateo County Sanitation District WWTP, Place ID 244566 CA3100029 TAHOE CITY PUD - TIMBERLAND North Shore WRP, Place ID 244569 CA3110010 TAHOE CITY PUD - MAIN Northwest WWTF, Place ID 266439 CA3110011 TAHOE CITY PUD - MCKINNEY/QUAIL Novato and Ignacio WWTP, Place ID 244705 CA3110013 TAHOE CITY PUD - TAHOE CEDARS NW Regional Waste Disp Fac, Place ID 244785 CA3110043 TAHOE CITY PUD - MADDEN CREEK Oak Hills Development WWTP, Place ID 245564 CA3110044 TAHOE CITY PUD - ALPINE PEAKS Oak Shores Development CSA-7A, Place ID 245581 CA1510020 TEHACHAPI, CITY OF Oakdale WWTF, Place ID 245602 CA0410008 THERMALITO WATER & SEWER DIST Oakwood Lake WWTF, Place ID 241099 CA5610020 THOUSAND OAKS WATER DEPT Oceana Marin (North Marin CWD), Place ID 245775 CA1910213 TORRANCE-CITY, WATER DEPT.
OCSD Plant 1, Place ID 758392 CA3010094 TRABUCO CANYON WATER DISTRICT OCSD Plant 2, Place ID 259158 CA3910011 TRACY, CITY OF
Ojai Valley WWTP, Place ID 246616 CA5610043 TRIUNFO WATER & SANITATION DISTRICT Olivehurst WWTP, Place ID 245949 CA2910003 TRUCKEE-DONNER PUD, MAIN Orange Cove WWTF, Place ID 273127 CA5410015 TULARE, CITY OF Oro Loma/Castro Valley SD WPCP, Place ID 246217 CA5500363 TUD-WARDS FERRY RANCHES Oxnard WWTP, Place ID 246946 CA5510001 TUD - SONORA/JAMESTOWN WATER SYSTEM Pacific Union College WWTP, Place ID 247301 CA5510002 TUD - PONDEROSA Palm Desert WRP #10, Place ID 247419 CA5510003 TUD - TUOLUMNE WATER SYSTEM Palm Springs Village-309, LLC Silvertip Resort Village WWTF, Place ID 257153 CA5510012 TUD - UPPER BASIN WATER SYSTEM Palm Springs WWTF, Place ID 247435 CA5510013 TUD - COLUMBIA WATER SYSTEM Palmdale Water Reclamation Plant, Place ID 247448 CA5510015 TUD - CEDAR RIDGE WATER SYSTEM Palo Alto Regional WQCP, Place ID 247457 CA5510021 TUD-PEACEFUL PINES WATER SYSTEM Palo Cedro WWTF, Place ID 247464 CA5510025 TUD - PHOENIX LAKE PARK Paradise Cove Mobile Home Park & Paradise Cove Beach Cafe, Place ID 828255 CA5510028 TUD-APPLE VALLEY ESTATES Paradise Ranch WWTP, Place ID 249771 CA5510033 TUD-SCENIC VIEW/SCENIC BROOK Park Knolls Subdivision, Place ID 247633 CA5010019 TURLOCK, CITY OF Parlier WWTF, Place ID 273128 CA3010046 CITY OF TUSTIN
Pasadera Reclamation Facility (Producer), Place ID 247731 CA3610049 TWENTYNINE PALMS WATER DISTRICT Pasatiempo Golf Club Recycled Water Project (System No. 4490004), Place ID 819577 CA2310003 UKIAH, CITY OF Paso Robles WWTP, Place ID 247750 CA3610050 UPLAND, CITY OF Pauma Valley Treatment Plant, Place ID 247809 CA4810008 CITY OF VACAVILLE Penn Valley WWTP, Place ID 247940 CA3710002 VALLECITOS WD Perris Valley RWRF, Place ID 259209 CA4810007 CITY OF VALLEJO Petaluma Ellis Creek Water Recycling Facility (NPDES Permit), Place ID 248087 CA4810021 CITY OF VALLEJO-LAKES SYSTEM Pinecrest WWTP, Place ID 248442 CA3710026 VALLEY CENTER MWD Pismo Beach WWTP, Place ID 248519 CA1910009 VALLEY COUNTY WATER DIST.
Pixley WWTF, Place ID 726883 CA4910013 VALLEY OF THE MOON WATER DISTRICT Planada WWTF, Place ID 273182 CA1910166 VALLEY WATER CO.
Pleasant Valley State Prison WWTF, Place ID 248717 CA1510029 VAUGHN WC INC Plymouth WWTP, Place ID 248753 CA5610018 VENTURA CWWD NO. 1 - MOORPARK Point Arena Wastewater Treatment Plant, Place ID 248791 CA5610023 VENTURA WWD NO. 8 - SIMI VALLEY Point Dume Club WWRP, Place ID 251021 CA1910167 VERNON-CITY, WATER DEPT.
Point Loma WWTP & Ocean Outfall, Place ID 248796 CA3610052 VICTORVILLE WATER DISTRICT Pomona Water Reclamation Plant, Place ID 250700 CA3710027 VISTA IRRIGATION DISTRICT Poplar WWTF, Place ID 273183 CA1910234 WALNUT VALLEY WATER DISTRICT Port Costa WWTP, Place ID 248886 CA1510021 WASCO, CITY OF Porterville WWTF, Place ID 273130 CA4410011 WATSONVILLE, CITY OF Portola WWTP, Place ID 248936 CA1510022 WEST KERN WATER DISTRICT Princeton WWTP, Place ID 249211 CA5710003 CITY OF WEST SACRAMENTO Pure Water Monterey Groundwater Replenishment Project, Place ID 805968 CA3610004 WEST VALLEY WATER DISTRICT Ragged Point Inn Motel, Place ID 251473 CA4110027 WESTBOROUGH WATER DISTRICT Ralph W Chapman WRF, Place ID 251548 CA3310036 WESTERN MWD - MURRIETA DIVISION Rancho Del Campo WPCF OWTS, Place ID 251653 CA3310049 WESTERN MWD Rancho Larios WWTP, Place ID 251675 CA3310076 WESTERN MWD (ID A - RAINBOW) Rancho Murieta CSD WWT & Rec, Place ID 251695 CA3010064 CITY OF WESTMINSTER Rancho Santa Fe San Dist Plant, Place ID 251714 CA1910173 WHITTIER-CITY, WATER DEPT.
Ray Stoyer Water Recycling Facility, Place ID 247351 CA4910017 WINDSOR, TOWN OF Raymond A. Boege Alvarado WWTP (Union SD), Place ID 269042 CA5710006 CITY OF WOODLAND Reclam,OCWD-Green Acres, Place ID 251975 CA3010037 YORBA LINDA WATER DISTRICT Red Bluff WW Reclamation Plant, Place ID 252119 CA4710011 YREKA, CITY OF Redlands WWRF, Place ID 259148 CA5110002 CITY OF YUBA CITY Redway POTW, Place ID 252211 CA3610055 YUCAIPA VALLEY WATER DISTRICT Redwood City Recycled Water (Silicon Valley Clean Water), Place ID 255832 CA3610125 SBDNO COUNTY SERVICE AREA 70J Reedley WWTF, Place ID 273131 CA2010001 CHOWCHILLA CITY WATER DEPT Rialto WWRF, Place ID 259149 CA3910027 MOUNTAIN HOUSE COMMUNITY SERVICES DIST.
Richardson Bay SD- Recycled Water, Place ID 251857 CA1910017 SANTA CLARITA VALLEY W.A.-SANTA CLARITA Richardson Springs CSD, Place ID 252613 CA1910096 SANTA CLARITA VALLEY W.A.-NEWHALL DIV.
Richgrove WWTF, Place ID 273184 CA1910240 SANTA CLARITA VALLEY W.A.-VALENCIA DIVIS Richmond WPCP, Place ID 252657 CA1910247 SANTA CLARITA VALLEY W.A.-CASTAIC DIV.
Ridgecrest WTF, Place ID 252695 CA1910250 SANTA CLARITA VALLEY W.A.-PINETREE DIV.
Ridgemark Estates WWTP, Place ID 252700 CA1910255 SANTA CLARITA VALLEY W.A.-TESORO DIV.
Rio Dell City WWTF, Place ID 252750
Rio Ramaza WW Disposal Ponds, Place ID 252762
Ripley WTP 03-012, Place ID 252780
Ripon Industrial & Domestic TP, Place ID 252782
Riverbank WWTP, Place ID 252871
Riverdale WWTF, Place ID 273185
Riverside City WWRF, Place ID 259150
Riverstone WWTF, Place ID 807214
Robbins Wastewater Treatment Facility, Place ID 253008
Rock Creek Area WTP, Place ID 253121
Rodeo Sanitary District WWTP, Place ID 253174
Rolling Green Terrace WTF, Place ID 253241
Rosamond WTF (Ponds), Place ID 253293
Roseville City Master Reclamation Permit, Place ID 239771 Rovana Housing Package STP, Place ID 253412
Running Springs WWTP, Place ID 259160
Russell City Energy Center Recycled Water Facility, Place ID 785242 Salida WWTP, Place ID 255081
SAM WWTP (Sewer Authority Mid-Coastside Wastewater Treatment Plant), Place ID 255139 San Andreas SD WWTP, Place ID 255180
San Ardo Wastewater Treatment Plant, Place ID 255190
San Clemente Island WWTP, Place ID 260064
San Diego Zoo's Safari Park, Place ID 255446
San Elijo Water Campus, Place ID 255265
San Jacinto Valley RWRF, Place ID 259193
San Jerardo WWTP, Place ID 255306
San Joaquin WWTF, Place ID 273132
San Jose Creek Water Reclamation Plant, Place ID 260156 San Jose/Santa Clara WPCP, Place ID 255333
San Juan Bautista WWTP, Place ID 255337
San Leandro WPCP, Place ID 255368
San Luis Hills WWTF, Place ID 260176
San Luis Obispo WWTP, Place ID 255380
San Luis Rey Water Reclamation Facility - Recycled Water and Pure Water, Place ID 255386 San Mateo WWTP, Place ID 255420
San Miguel SD WWTP, Place ID 255430
San Miguelito Wild Cherry Canyon, Place ID 272525
San Nicolas Island WWTP, Place ID 260219
San Simeon WWTP, Place ID 255462
San Vicente Wastewater Treatment Plant, Place ID 255468 San Ysidro Land Port of Entry - AppRecyclWW, Place ID 769664 Sandy Mush WWTF, Place ID 255535
Sanger WWTF, Place ID 273133
Santa Cruz WWTP, Place ID 255632
Santa Fe Valley WTP, Place ID 255649
Santa Lucia WW Recycling Facility (Prod/User), Place ID 255653 Santa Maria WWTP, Place ID 255679
Santa Nella WWTF, Place ID 273186
Santa Paula WRF, Place ID 650554
Santa Rosa Laguna Subregional Water Reclamation Facility, Place ID 255703 Santa Rosa WRF-Recycled WTR, Place ID 255735
Sas Regional Reclamation Facility, Place ID 252315
Saugus Water Reclamation Plant, Place ID 260494
Sausalito Marin City STP, Place ID 255802
SCICON WWTF, Place ID 759028
SCLA Central WWTP-Victorville Water Dist, Place ID 747480 Scotts Valley WWTP, Place ID 256011
SCRWA Reclamation Facility, Use Areas, Place ID 256038
SCSD Desert Shores WWTP, Place ID 219671
SCSD Thomas R. Cannell WWTP, Place ID 647900
SCWA Airport WRF (Airport-Larkfield-Wikiup), Place ID 256045 SCWA Geyserville CSD, Place ID 256049
SCWA Russian River CSD, Place ID 256061
Seeley CWD WWTP, Place ID 256217
Sequoia Dawn Apartments WWTF, Place ID 256307
Sequoia Field WWTF, Place ID 256309
Sewerage Agency of Southern Marin (SASM) WWTP, Place ID 255788 Sewerage Commission Oroville Region WWTP, Place ID 246251 SF - OCEANSIDE Water Pollution Control Plant, Place ID 256498 SF Airport Mel Leong TP-Sanitary Waste, Place ID 256507 SF-SE Water Pollution Control Plant, N-Point & Bayside, Place ID 256499 Sharon Heights Recycled Water Facility, Place ID 864895 Shasta College Sewage Disposal Pond, Place ID 256606
Shasta Lake WWTF, Place ID 256627
Shelter Cove POTW, Place ID 256749
Sierra Conservation CTR-WWTP-1 (NON15), Place ID 256920 Sierra High School WWTF, Place ID 273188
Simi Valley WQCP, Place ID 261253
SKF CSD WWTF, Place ID 273187
Skyline Ranch Country Club, Place ID 257379
SMWD - Chiquita WRP, Place ID 257518
SMWD Oso Creek WRP, Place ID 257520
SMWD-Nichols Reseach Inst WRF, Place ID 257519
Snelling WWTF, Place ID 273189
SOCWA - 3A Treatment Plant, Place ID 241540
SOCWA - Coastal TP, Place ID 257850
SOCWA - Regional TP, Place ID 241053
Soledad Wastewater Treatment Plant, Place ID 256483
Solvang WWTP, Place ID 257687
Sonoma Valley County SD WWTP, Place ID 257754
Sonoma West Holdings Plant #2 Facility, Place ID 248632 Sonora Regional WWTF, Place ID 257763
South Bay International Wastewater Treatment Plant, Place ID 257821 South Bay WRP, Place ID 257831
South San Francisco-San Bruno WQCP, Place ID 254881
South San Luis Obispo SD WWTP, Place ID 257887
Southeast Regional WW System, Place ID 257927
Southern Regional Tertiary Treatment Plant, Place ID 638334 Southworth Ranch Estates WWTF, Place ID 258004
Spalding Tract Sewer System, Place ID 638757
Spreckels Wastewater Treatment Plant, Place ID 258186
Springville WWTF, Place ID 273190
St Helena Hospital WWTP, Place ID 271772
St. Helena City WWTP, Place ID 258386
Stallion Springs WWTF, Place ID 273191
Stillwater WWTP Reclamation, Place ID 258677
Stockton Regional WW Control Facility, Place ID 258739
Stovepipe Wells Village, Place ID 259143
STPUD Wastewater Treatment Plant, Place ID 259230
Stratford WWTF, Place ID 273135
Strathmore WWTF, Place ID 273192
Summerland SD WWTP, Place ID 259377
Sun City RWRF, Place ID 259223
Sunnyvale WPCP, Place ID 259507
Sutter Creek WWTP, Place ID 259717
Taft Federal Prison WWTF, Place ID 262797
Taft WWTF, Place ID 214665
Tahoe Truckee Sanitation Agency, Place ID 262840
Tapia WRF, Place ID 266940
TCWD Robinson Ranch WRF, Place ID 262996
Tecopa Hot Springs Park WWTF, Place ID 263043
Tecopa Hot Springs Resort LLC, Place ID 263044
Tehachapi Correctional Inst WWTF, Place ID 263072
Tehachapi WWTF, Place ID 273136
Tejon Industrial Complex East WWTF, Place ID 740731
Tejon Mountain Village, Place ID 739154
Temecula Valley RWRF, Place ID 263145
Temescal Valley WD WWRF, Place ID 259216
Tenaya Lodge Wastewater Treatment Plant, Place ID 263168 Terminal Island Water Reclamation Plant, Place ID 267130 Terra Bella WWTF, Place ID 273193
Tesoro Viejo Wastewater Treatment Plant, Place ID 817457 The Preserve at Millerton Lake, Place ID 244531
The Thacher School Wastewater Treatment Plant, Place ID 267429 Thomas Aquinas College, Place ID 260412
Thunder Valley Casino WWTP, Place ID 206730
Tinsley Island WWTF, Place ID 264551
Tipton WWTF, Place ID 273194
Tivoli Cove WWTP, Place ID 267585
Todd Road Jail WWTP, Place ID 267596
Tomales Village WWTP, Place ID 264662
Top O'Topanga Community Association WWTP, Place ID 267637 Toyon Middle School, Place ID 264856
Tracy WWTP, Place ID 266223
Trancas WPCP, Place ID 268548
Tranquillity WWTF, Place ID 273195
Treasure Island WWTP/DOD, Place ID 266328
Tres Pinos WWTP, Place ID 266350
Trimmer Recreation Area - Pine Flat Lake, Place ID 707474 Trinity County Waterworks District #1 Hayfork WWTP, Place ID 229873 Trona & Pioneer Point WTF, Place ID 266519
Tulelake City WWTP, Place ID 266694
Tuolumne City WWTP, Place ID 266720
Tuolumne Meadows Wastewater Treatment Facility, Place ID 274504 Turlock City, Turlock Regional Water Quality Control Facility, Place ID 266737 Twain Harte WWTP, Place ID 266795
Two Harbors STP, Catalina Island, Place ID 268842
UC Davis Main WWTP, Place ID 268926
Ukiah City WWTP, Place ID 268960
US Coast Guard TRACEN - Tomales, Place ID 269543
US Navy Naval Air Facility WWTP, Place ID 269449
USMC - Mainside WWTF, Place ID 269589
USMC Camp Pendleton Northern Regional Tertiary Treatment Plant, Place ID 793504 USMC MWTC Coleville Housing WWTF, Place ID 269588
USMC-MWTC WWTC, Place ID 269591
Valencia WRP, Place ID 270849
Vallecitos WD Meadowlark WRP, Place ID 269989
Vallejo Flood & Wastewater District (VFWD) Wastewater Treatment Plant, Place ID 270006 Valley SD WWTP, Place ID 270096
Valley Springs SD WWTF, Place ID 270105
Ventura WRF, Place ID 271054
Victor Valley Wastewater Reclamation Authority WTP, Place ID 270419 Visalia Water Reclamation Facility (WRF), Place ID 273138 Vista Canyon Water Factory, Place ID 805193
VVWRA Sub-Regional Plant-Apple Valley, Place ID 761913
VVWRA- Sub-Regional Plant-Hesperia, Place ID 761903
Warm Springs Rehabilition Center, Place ID 273397
Wasco State Prison WWTF, Place ID 271740
Wasco WWTF, Place ID 273196
Waterford WWTP, Place ID 271836
Watsonville WWTP, Place ID 271872
Wawona WWTF, Place ID 271887
Weaverville SD WWTP, Place ID 271915
Weed WWTP, Place ID 271945
West County WW District WPCP, Place ID 272082
West Point WWTF, Place ID 272109
Western Hills WWRF, Place ID 259153
Western MWD - Murrieta Division Area, Place ID 735700
Western Water Recycling Facility, Place ID 259198
Westmorland City WWTP, Place ID 272291
Westwood STP, Place ID 272344
Whispering Palms WPCF, Place ID 272418
White Slough Water Pollution Control Facility, Place ID 272444 Whitehawk Ranch WWTP, Place ID 272456
Whittier Narrows Water Reclamation Plant, Place ID 235826 Wild Wings Water Recycling Facility, Place ID 272537
Williams WWTP, Place ID 272631
Willits City WWTP, Place ID 272646
Willow Springs MHP, Place ID 272688
Willows Wastewater Treatment Plant, Place ID 272704
Wilseyville Wastewater Treatment Plant, Place ID 272716 Windflower Point STP, Place ID 272758
Windsor Wastewater Treatment, Reclamation, and Disposal Facility, Place ID 272790 Winters WWTF, Place ID 272837
Woodbridge SD-Sewage Treatment, Place ID 272919
Woodlake Sentinel Butte Recycling Project, Place ID 253887 Woodlake WWTF, Place ID 273140
Woodland Water Pollution Control Facility, Place ID 272960 Woodlands Mutual Water Company, Place ID 272964
Woods Valley Ranch Water Reclamation Facility, Place ID 272975 Woodville Farm Labor Center, Place ID 272986
Woodville WWTF, Place ID 273197
Woodward Reservoir Reg Park, Place ID 272989
WRCRWA Regional WWRF, Place ID 259205
Yermo Domestic WTF, Place ID 274458
Yosemite West MD WWTF, Place ID 274513
Yountville / CA Vets Home WWTP, Place ID 274410
Yreka City WWTP, Place ID 274538
Yuba City WWTF, Place ID 274556
Other (provide name and ID in "NOTES" field)
City of Santa Rosa 2025 Urban Water Management Plan
June 2026
APPENDIX D: WATER DEMAND ANALYSIS
EKI A80038.00 i 19 December 2025
2025 WATER DEMAND ANALYSIS
AND WATER CONSERVATION
MEASURE UPDATE
City of Santa Rosa
19 December 2025
EKI C40180.00
EKI ENVIRONMENT & WATER, INC.
www.ekiconsult.com
2001 Junipero Serra Blvd, Suite 300 • Daly City, CA 94014
2025 WATER DEMAND ANALYSIS AND WATER CONSERVATION
MEASURE UPDATE
19 December 2025
Prepared for:
City of Santa Rosa
Prepared by:
EKI Environment & Water, Inc.
2001 Junipero Serra Blvd., Suite 300
Daly City, California 94014
(650) 292-9100
www.ekiconsult.com
EKI C40180.00
19 December 2025
i EKI C40180.00
2025 Water Demand Analysis and Water Conservation
Measure Update
City of Santa Rosa
TABLE OF CONTENTS
1 INTRODUCTION ......................................................................................................... 1-1 2 REGULATORY CONTEXT ............................................................................................. 2-1
2.1 UWMP Demand Projections Requirements ........................................................... 2-1
2.2 New Requirements for Water Use Efficiency ......................................................... 2-2
2.2.1 Making Conservation a California Way of Life ................................................... 2-2
2.2.2 Related Regulations with MCCWL Compliance Implications ............................. 2-4 3 WATER USE CHARACTERISTICS .................................................................................. 3-1
3.1 Historical Total and Per Capita Water Use ............................................................. 3-1
3.2 Water Use Trends by Customer Sector .................................................................. 3-6
3.3 Estimated Indoor and Outdoor Water Use .......................................................... 3-10
3.4 Distribution of Residential Water Use ................................................................. 3-13
3.5 Spatial Distribution of Residential Water Use Across the City Service Area ......... 3-16
3.6 Estimated Residential Per Capita Indoor Water Use ............................................ 3-17 4 CONSERVATION PROGRAM PARTICIPATION ............................................................. 4-1
4.1 Conservation Programs ......................................................................................... 4-1
4.2 Historical Conservation Program Participation ...................................................... 4-4
4.3 Estimated Savings from Past Conservation Programs ............................................ 4-6
4.3.1 Water Savings Based on AWE Model ................................................................ 4-6
4.3.2 Estimated Water Savings for Six Selected Programs Based on Customer Billing Data ................................................................................................................. 4-14
4.4 Spatial Trends in Program Participation .............................................................. 4-22
4.5 Building Stock Characteristics .............................................................................. 4-30
4.6 Demographic Characteristics of Residential Conservation Program Participation 4-30
4.6.1 Household Income Trends .............................................................................. 4-31
4.6.2 Homeownership Trends .................................................................................. 4-31
4.6.3 Household Age Trends .................................................................................... 4-32
4.7 Summary ............................................................................................................. 4-45 2025 Demand & Conservation Update
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5 WATER DEMAND PROJECTIONS ................................................................................ 5-1
5.1 Basis for Account Growth Projections ................................................................... 5-1
5.2 Planned Development Within the Service Area ..................................................... 5-5
5.3 Water Demand Factors .......................................................................................... 5-5
5.3.1 Potable Water ................................................................................................... 5-5
5.3.2 Recycled Water ................................................................................................. 5-5
5.3.3 Non-Revenue Water and Water Loss ................................................................ 5-5
5.4 Passive Water Savings Estimate ............................................................................ 5-6
5.5 Projected Water Demand Through 2050 ............................................................... 5-7
5.6 Projected Compliance with UWUOs .................................................................... 5-10 6 CONSERVATION MEASURES UPDATE ........................................................................ 6-1
6.1 Methodology for Screening of Potential Water Conservation Measures ............... 6-1
6.2 Screening of Conservation Measures for Regional Implementation ...................... 6-2
6.2.1 Public Outreach and Education-Based Conservation Programs ........................ 6-2
6.2.2 Device and Financial Incentive-Based Conservation Programs ......................... 6-2
6.2.3 Regional Program Screening Findings ............................................................... 6-4
6.3 Screening of Conservation Measures for Local Implementation ............................ 6-4
6.3.1 Agency Actions and Water Rate Conservation Programs .................................. 6-4
6.3.2 Public Outreach and Education-Based Conservation Programs ........................ 6-4
6.3.3 Device and Financial Incentive-Based Conservation Programs ......................... 6-4
6.3.4 Policy and Regulation-Based Conservation Programs ....................................... 6-4
6.4 Evaluation of Future Water Conservation Programs .............................................. 6-5 7 CONCLUSIONS ........................................................................................................... 7-1
7.1 Historical, Current, and Projected Water Demand ................................................. 7-1
7.2 Conservation Measures Participation, Savings, and Update .................................. 7-1 8 REFERENCES .............................................................................................................. 8-1
2025 Demand & Conservation Update
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TABLES (IN REPORT TEXT)
Table 3-1 Total and Per-Capita Water Use ........................................................................ 3-2 Table 3-2 Annual Water Use by Customer Sector ............................................................. 3-4 Table 3-3 Average Per-Account Water Use by Customer Sector ....................................... 3-8 Table 3-4 Summary of Distribution of Residential Indoor and Outdoor Water Use in 2024 ........................................................................................................................ 3-16 Table 3-5 Estimated Residential Per Capita Indoor Water Use ....................................... 3-19 Table 4-1 Description of Conservation Programs .............................................................. 4-2 Table 4-2 Participation in SMSWP School Education Programs, Direct Instruction........... 4-5 Table 4-3 Summary of Conservation Program Participation ............................................. 4-7 Table 4-4 Estimated Water Savings Achieved by Conservation Programs and Passive Savings ........................................................................................................................ 4-11 Table 4-5 Average Estimated Water Savings Achieved by Selected Conservation Programs, 2013-2021 ....................................................................................................... 4-16 Table 4-6 Estimated Water Savings Achieved by the SFR Cash for Grass Rebate Green Exchange Program .......................................................................................... 4-17 Table 4-7 Estimated Water Savings Achieved by the SFR WaterSmart Check -up (Indoor) Program ............................................................................................ 4-18 Table 4-8 Estimated Water Savings Achieved by the SFR WaterSmart Check -up (Outdoor) Program ......................................................................................... 4-19 Table 4-9 Estimated Water Savings Achieved by the CII and MFR Cash for Grass Rebate Green Exchange Program ................................................................................ 4-20 Table 4-10 Estimated Water Savings Achieved by the CII WaterSmart Check -up (Indoor) Program ............................................................................................ 4-21 Table 4-11 Estimated Water Savings Achieved by the CII and MFR WaterSmart Check -up (Outdoor) Program ......................................................................................... 4-22 Table 4-12 Building Stock Characteristics by Program Participants .................................. 4-37 Table 4-13 Residential Customer Program Participation by Median Household Income .. 4-39 Table 4-14 Residential Customer Program Participation by Percentage of Renters ......... 4-41 Table 4-15 Residential Customer Program Participation by Median Household Age ....... 4-43 Table 5-1 Historical and Projected Account Growth Rate by Customer Sector ................. 5-2 Table 5-2 Population and Employment Projections .......................................................... 5-3 Table 5-3 Selected Water Demand Factors ....................................................................... 5-6 Table 5-4 Projected Demand and Passive Conservation ................................................... 5-7 2025 Demand & Conservation Update
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Table 5-6 Projected Water Demand by Sector .................................................................. 5-8 Table 5-7 Actual and Projected Water Use vs. Urban Water Use Objectives .................. 5-11 Table 6-1 Prioritization of Conservation Measures and Programs, Regional Rankings ..... 6-3 Table 6-2 Conservation Measure Scenarios ...................................................................... 6-8 Table 6-3 Costs and Savings of Potential Conservation Programs .................................... 6-9 Table 6-4 Program Scenario Total Conservation Savings and Unit Costs ........................ 6-11
FIGURES (IN REPORT TEXT)
Figure 1-1 Participating Sonoma-Marin Saving Water Partnership Members .................... 1-3 Figure 1-2 City of Santa Rosa Service Area ......................................................................... 1-4 Figure 2-1 Components of Urban Water Use Objective ..................................................... 2-2 Figure 2-2 Progression of Indoor and Outdoor Efficiency Standards Through 2040 .......... 2-5 Figure 2-3 General Timeline of MCCWL Regulatory Requirements .................................... 2-6 Figure 3-1 Total Water Production and Per Capita Water Use ........................................... 3-3 Figure 3-2 Annual Water Use by Customer Sector ............................................................. 3-5 Figure 3-3 Proportional Water Use by Customer Sector in 2024 ....................................... 3-5 Figure 3-4 Monthly Water Use and 12-Month Moving Average ........................................ 3-7 Figure 3-5 Average Per-Account Water Use by Customer Sector ....................................... 3-9 Figure 3-6 Average Monthly Water Use, 2010-2024 ........................................................ 3-11 Figure 3-7 Indoor and Outdoor Water Use Percentages by Sector, 2017-2024 ............... 3-11 Figure 3-8 Estimated Indoor and Outdoor Water Use, 2024 ............................................ 3-13 Figure 3-9 Distribution of Residential Indoor and Outdoor Water Use in 2024 ............... 3-15 Figure 3-10 Spatial Distribution of Residential Total Water Use ........................................ 3-18 Figure 3-11 Estimated Residential Per Capita Indoor Water Use ....................................... 3-19 Figure 4-1 Conservation Program Participation by Program Type ................................... 4-10 Figure 4-2 Estimated Annual Water Savings Achieved by Conservation Programs .......... 4-13 Figure 4-3 Participation Density for the SFR Cash for Grass Rebate Green Exchange Program .............................................................................. 4-24 Figure 4-4 Participation Density for the SFR WaterSmart Check-up (Indoor) Program .... 4-25 Figure 4-5 Participation Density for the SFR WaterSmart Check-up (Outdoor) Program . 4-26 Figure 4-6 Participation Density for the CII and MFR Cash for Grass Rebate Green Exchange Program ......................................................................................................... 4-27 2025 Demand & Conservation Update
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Figure 4-7 Participation Density for the CII WaterSmart Check-up (Indoor) Program ...... 4-28 Figure 4-8 Participation Density for the CII and MFR WaterSmart Check -up (Outdoor) Program ......................................................................................................... 4-29 Figure 4-9 Age of Building Stock ....................................................................................... 4-33 Figure 4-10 Median Household Income ............................................................................. 4-34 Figure 4-11 Percentage of Renters ..................................................................................... 4-35 Figure 4-12 Median Household Age ................................................................................... 4-36 Figure 4-13 Potential Customers to Target for SFR Programs ............................................ 4-46 Figure 5-1 Population and Employment Projections .......................................................... 5-4 Figure 5-2 Water Demand Projections ............................................................................... 5-9 Figure 5-3 Actual and Projected Water Use vs. Urban Water Use Objectives .................. 5-11 Figure 5-4 Projected Water Use vs. Urban Water Use Objectives by Component ........... 5-12
APPENDICES
Appendix A Methodology for Estimating Indoor and Outdoor Water Use Appendix B Conservation Program Assumptions
Appendix C Methodology for Water Conservation Program Savings Analyses Appendix D Prioritization and Screening of Future Water Conservation Measures
2025 Demand & Conservation Update
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vi EKI C40180.00
ABBREVIATIONS AND ACRONYMS
2020 Report 2020 Water Demand Analysis and Water Conservation Measure Update AB Assembly Bill
AFY acre-feet per year
AWE Alliance for Water Efficiency
BMPs Best Management Practices
CII Commercial, Industrial, and Institutional
City City of Santa Rosa
CWC California Water Code
DIM dedicated irrigation meter
DMM demand management measure
DWR Department of Water Resources
FY Fiscal Year
GPCD gallons per capita per day
gpd/unit gallons per day per unit
gpy gallons per year
HECW high-efficiency clothes washer
HET high-efficiency toilet
LEF landscape efficiency factors
MCCWL Making Conservation a California Way of Life
MFR multi-family residential
MUMs mixed-use meters
Objective Urban Water Use Objective
QWEL Qualified Water Efficient Landscaper
Report 2025 Water Demand and Conservation Report
R-GPCD residential gallons per capita per day
SB Senate Bill
SFR single-family residential
SMSWP Sonoma-Marin Saving Water Partnership
State Water Board State Water Resources Control Board
UWMP Urban Water Management Plan
Water Contractors The nine members of the SMWSP participating in this project Section 1 2025 Demand & Conservation Update
Introduction City of Santa Rosa
19 December 2025
1-1 EKI C40180.00
1 INTRODUCTION
To support the development of the 2025 Urban Water Management Plan (UWMP) updates, nine members of the Sonoma -Marin Saving Water Partnership (SMSWP) coordinated to conduct a joint update of their water demand projections and water conservation planning efforts (i.e., the 2025 Water Demand and Conservation Project). The participating SMSWP members include the City of Cotati, City of Petaluma, City of Rohnert Park, City of Santa Rosa, City of Sonoma, Marin Municipal Water District, North Marin Water District, Town of Windsor, and Valley of the Moon Water District. These nine participating SMSWP members (referred to as Water Contractors herein) are shown on Figure 1-1.
The goals of the 2025 Water Demand and Conservation Project are to apply a common methodology to conduct the following analysis for each Water Contractor:
• Evaluate and document recent historical water use characteristics and trends, including population and account growth (in this report, the term “account” indicates “water connection”);
• Estimate projected water demands for the years 2030 through 2050 to support both the 2025 UWMP update and coordination and planning efforts with Sonoma Water; • Update the suite of common regional conservation measures that are being considered for implementation in the future;
• Review and document past participation in water conservation programs; and • Estimate the potential water savings associated with future water conservation program implementation.
This 2025 Water Demand and Conservation Measure Update presents the results for the City of Santa Rosa (City), located in Sonoma County, and serving a population of approximately 174,890 people in 20 24 (Figure 1-2). The City’s water supplies include surface water purchased from Sonoma Water, local groundwater supply pumped from City wells in the Santa Rosa Plain Subbasin, and recycled water produced at the City’s regional water recycling facility (Santa Rosa, 2021). Conservation has been achieved through the implementation of water conservation programs, including most administered by the City and some administered through the regional SMSWP.
This 2025 Water Demand and Conservation Report is organized as follows:
• Section 1 identifies the goals and objectives of the Report; • Section 2 provides the regulatory context for the demand projections as described in the Report as well as new requirements related to Making Conservation a California Way of Life (Assembly Bill [AB]-1668/ Senate Bill [SB]-606) that impact the water demand and conservation planning components of the 2025 UWMPs; • Section 3 describes historical water use patterns and characteristics within the City; • Section 4 documents past participation in conservation programs and estimated savings associated with program implementation, and presents the results of a detailed analysis of program participation trends for select conservation programs; Section 1 2025 Demand & Conservation Update
Introduction City of Santa Rosa
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• Section 5 describes the projected water demands through 2050, including the assumptions and methodology used;
• Section 6 documents the water conservation measure screening process, identifies individual programs and program scenarios for potential future implementation by the City, and presents the results of a benefit -cost analysis and an estimate of the potential water savings associated with these conservation programs; • Section 7 documents the key findings and conclusions from the analyses presented throughout this report; and
• Section 8 provides key references and sources.
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1. All locations are approximate.
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Water Partnership Members
Sources
1. Service area boundaries provided by respective agencies.
2. Basemap provided by ESRI.
±
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(Scale in Miles)
Legend
City of Cotati
City of Petaluma
City of Rohnert Park
City of Santa Rosa
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North Marin Water District
Town of Windsor
Valley of the Moon Water District
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Figure 1-1
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Notes
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Service Area Boundary –
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Sources
1. Service area boundary provided by City of Santa Rosa.
2. Basemap provided by ESRI.
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Figure 1-2
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County Boundaries
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2 REGULATORY CONTEXT
This section provides the regulatory background for the requirements to project future demand in the 2025 UWMP. Although there are no updates to the UWMP regulations since 2020, the Making Conservation a California Way of Life (MCCWL) and other state regulations will impact the 2025 UWMPs, as they will inform the water demand projections and conservation planning components.
2.1 UWMP Demand Projections Requirements
California Water Code (CWC) § 10631, excerpted below, describes the requirements to develop water demand projections that consider water use by customer sector, incorporate distribution system water loss, and account for anticipated water savings. Water demand projections herein were developed for the City using a land-use-based approach that is consistent with these requirements, and can be incorporated into the City’s 2025 UWMP.
CWC § 10631
A plan shall be adopted in accordance with this chapter that shall do all of the following:
…
(d) (1) For an urban retail water supplier, quantify, to the extent records are available, past and current water use, over the same five -year increments described in subdivision (a), and projected water use, based upon information developed pursuant to subdivision (a), identifying the uses among water use sectors, including, but not necessarily limited to, all of the following:
(A) Single-family residential.
(B) Multifamily.
(C) Commercial.
(D) Industrial.
(E) Institutional and governmental.
(F) Landscape.
(G) Sales to other agencies.
(H) Saline water intrusion barriers, groundwater recharge, or conjunctive use, or any combination thereof. (I) Agricultural.
(J) Distribution system water loss.
(2) The water use projections shall be in the same five-year increments described in subdivision (a). …
(d)(4) (A) Water use projections, where available, shall display and account for the water savings estimated to result from adopted codes, standards, ordinances, or transportation and land use plans identified by the urban water supplier, as applicable to the service area.
(B) To the extent that an urban water supplier reports the information described in subparagraph (A), an urban water supplier shall do both of the following:
(i) Provide citations of the various codes, standards, ordinances, or transportation and land use plans utilized in making the projections.
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(ii) Indicate the extent that the water use projections consider savings from codes, standards, ordinances, or transportation and land use plans. Water use projections that do not account for these water savings shall be noted of that fact.
2.2 New Requirements for Water Use Efficiency
2.2.1 Making Conservation a California Way of Life
The State Water Resources Control Board (State Water Board) adopted a new Conservation Framework to implement SB 606 and AB 1668 through the enactment of the MCCWL regulation in July 2024. The Conservation Framework requires each urban water supplier to calculate and comply with an annual Urban Water Use Objective (Objective) and to implement Commercial, Industrial, and Institutional ( CII) Performance Measures, both of which must be reported on annually starting January 1, 2024 (although compliance with the Objective is not required until January 1, 2027).
As illustrated on Figure 2-1 below, the Objective is calculated as the sum of the following components: (1) residential indoor water use standard, (2) residential outdoor water use standard, (3) CII landscape outdoor water use standard (for landscapes with dedicated irrigation meters [DIMs]), (4) water loss standard, (5) allowable variances, and (6) bonus provisions. Per the latest guidelines released by the Department of Water Resources (DWR) and the State Water Board, agencies will need to assess whether they meet their overall Objective (i.e., they are not required to comply with the individual water use standards as long as they meet the overall Objective).
Figure 2-1 Components of Urban Water Use Objective
The components of the Objective water use include the following:
• Indoor and Outdoor Residential. The indoor and outdoor residential component includes supplier-specific water use standards for indoor and outdoor single -family and multi - family residential use. The standard for efficient residential indoor water use is expressed in gallons per capita per day (GPCD) and is currently set at 55 GPCD until January 1, 2025, when it lowers to 47 GPCD, and finally lowers to 42 GPCD beginning January 1, 2030 (Figure 2-2). The residential indoor water use budget is calculated by multiplying a supplier’s residential service area population by the residential indoor standard and by the number of days in the year. The standard for efficient residential outdoor water use is expressed as landscape efficiency factor (LEF), a unitless number used to indicate the amount of water a supplier may need to deliver a healthy and efficient landscape in the service area and represents plant factors and irrigation efficiency (Figure 2-2). The
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outdoor budget is then calculated by multiplying the relevant outdoor LEF by landscape area, net evapotranspiration, and a unit conversion factor of 0.62; • Commercial, Industrial, and Institutional ( CII) Landscapes with Dedicated Irrigation Meters. The budget for CII water use associated with DIMs are calculated by multiplying the outdoor LEF (Figure 2-2; 1.0 for CII special landscape area), by square footage of the landscape area, net evapotranspiration, and a unit conversion of 0.62. However, the CII landscapes with DIMs budget will not become effective until June 30, 2028 ; until then, the budget is equal to actual water deliveries to CII DIMs . I n the future , urban retail suppliers will have the option of installing DIMs at “large landscapes” that are over 0.5 acres and currently served by mixed -use meters (MUMs) ( see discussion of CII Performance Measures below);
• Water Loss. Water loss represents “real water losses” or physical water losses from the pressurized potable water system (water mains and customer service connections) and the utility’s storage tanks, up to the point of customer consumption. These losses do not include apparent losses such as meter inaccuracies or theft. The water loss component is calculated based on the volumetric standards discussed in Section 2.2.2; • Variances. Variances are an additional volume of water that an urban retail water supplier may request to add to its Objective for a unique use that has a substantial impact on a supplier’s Objective. Types of variances include the following: (1) emergency response; (2) recycled water with high levels of total dissolved solids; and (3) other variances, which encompasses water use related to seasonal populations, dust control for horse corrals and animal exercise areas, irrigation of residential agricultural landscapes, water use for sustaining wildlife in ponds and lakes when required by regulation, and irrigation of existing trees. Approved variances can be included in a supplier’s budget for up to five years and have documentation demonstrating that the va riance does not conflict with permit requirements;
• Bonus Incentives. Bonus incentives apply to potable reuse projects to help suppliers meet the Objective through alternative water sources. The bonus incentive is calculated by multiplying the urban retail water supplier’s potable reuse volume, in gallons, depending on where the potable reuse water is obtained (i.e., groundwater basin, reservoir, direct potable reuse [DPR] project) by the portion of total potable water production delivered to residential and landscape irrigation connections for the reporting year. Suppliers must report and update the bonus incentive calculation annually. Required documentation includes data on potable reuse volumes, loss factors for groundwater recharge and recovery, and verification from relevant regulatory authorities.
The progression of the residential indoor water use standard, residential outdoor LEF, and CII landscape with DIMs outdoor LEF is summarized on Figure 2-2 below.
In addition, the Conservation Framework includes a number of requirements for CII Performance Measures, which include the following:
• Implementing a classification system for CII water users . Suppliers must classify CII accounts based on customer end use and annually maintain at least a 95% classification rate of CII end users. CII accounts are to be classified based on customer end use, in Section 2 2025 Demand & Conservation Update
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accordance with the 18 Energy Star Portfolio Manager’s broad categories (e.g., banking services, education, office, retail, utility, etc.) , including four additional CII categories of laundries, landscapes with DIMs, water recreation, and car washes. • Converting MUMs to DIMs for CII customers with large landscapes, or employing in-lieu technologies combined with rolling out Best Management Practices (BMPs). Suppliers must install DIMs for CII customers with large landscapes ( which include those over half an acre), or employ in-lieu technology (e.g., advanced metering infrastructure) and offer BMPs to CII customers.
• Providing BMP programs for CII customers . Suppliers must identify CII water users that exceed a recommended size, volume of water use, or another threshold. Options include identifying the top water users , identifying the top water users with in CII classification categories, or identifying inefficient CII water users with the use of key business activity indicators. For CII customers identified, suppliers must design and implement conservation plans from a list of approved BMP themes.
The implementation timeline of the MCCWL regulatory requirements is illustrated on Figure 2-3.
2.2.2 Related Regulations with MCCWL Compliance Implications The following two regulations are separate from those embedded in the compliance requirements of MCCWL and are required to be reported on within annual Objective reporting:
• Water Loss Control . Urban water retailers are required to comply with State-assigned volumetric standards for real water loss. Suppliers must calculate system -specific water loss budgets by multiplying their State Board-assigned water loss standard by the number of days in the year and, depending on the units associated with the standard, by either the number of total service connections or the length of the distribution system. Suppliers with multiple systems must calculate an a ggregate water loss budget b y summing the estimated losses for each system.
• Nonfunctional Turf Irrigation Ban (AB 1572). The nonfunctional turf irrigation ban applies to turf (mowed grass maintained for aesthetic purposes) that does not provide recreational or community benefits, including CII properties, and common areas of homeowner associations (HOAs). Water suppliers are required t o identify what landscapes fall under the ban and implement a plan to comply by the required schedule between 2027 and 2031 depending on the property type.
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Figure 2-2 Progression of Indoor and Outdoor Efficiency Standards Through 2040
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Figure 2-3 General Timeline of MCCWL Regulatory Requirements
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3 WATER USE CHARACTERISTICS
This section describes historical water use by customers within the City including changes in observed water use, changes in average water use per account over time, and estimates of indoor and outdoor water use. This information is used to provide context and background to support the projection of future water demands and estimates of potential conservation program benefits. The terms “water use ,” “water consumption ,” and “water demand” are used interchangeably in this document.
3.1 Historical Total and Per Capita Water Use
Table 3-1 and Figure 3-1 shows the City’s annual potable water use, annual recycled water use, total per capita water use inclusive of both potable and recycled water1, and residential per capita water use for the past 15 years, 2010 through 2024. As shown in Table 3-1 and on Figure 3-1, total water use (including potable and recycled water) rose steadily from 2010 to 2013 to a high of 21,960 acre-feet before declining significantly in 2014 in response to the historic 2014 -2017 drought and the State’s water use reduction mandates. From 2015 to 2019, water use remained relatively stable between approximately 16,600 and 18,000 AFY, despite continued population growth. Water use rose in 2020 to 19,387 AFY at the beginning of the pandemic and then declined again, coinciding with the 2021-2023 drought and drought response efforts. While there was a modest increase following the drought in 2024 to 17,284 AFY, total water use remains below historical levels observed in the 2010s.
Total per capita water use (including both potable and recycled water use) has declined over the period, from a high of 114 GPCD in 2013 to lows of 83 and 84 GPCD in 2022 and 2023, respectively, except for a high year of 97 GPCD in 2020. A similar trend was observed in residential per capita water use. These trends reflect the impact of water efficiency improvements, as well as demand hardening as structural and beha vioral changes during droughts result in lasting water use reductions.
Historical water consumption per customer sector is provided in Table 3-2 and shown on Figure 3-2. Figure 3-3 shows the proportional water use by sector in 2024. The single family residential (SFR) sector comprises the largest proportion of the City’s total water consumption (52%). By comparison, the proportional water use consumption for the other sectors includes multi-family residential (MFR) sector at 21%; the combined CII sector at 17%; dedicated irrigation accounts at
9.7%; with recycled and other water use collectively comprised of 0.5% of total water consumption. Separately, non-revenue water was estimated to be 5.3% of the City’s total water demand (Table 3-2).
1 Per capita water use for purposes of comparing water use to SB X7-7 water conservation targets may be different, due to the prescriptive method by DWR for determining an agencies compliance population and total water use. SB X7-7 compliance will be separately addressed by the City’s UWMP.
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Table 3-1 Total and Per-Capita Water Use
Year
Potable Water
Use (a)
(AFY)
Recycled
Water Use (a)
(AFY)
Total Water
Use
(AFY) (b)
Total Per
Capita Water
Use (c)
(GPCD)
Residential Per
Capita Water
Use (d)
(R-GPCD)
2010 19,428 (e) 19,428 104 70
2011 18,439 98 18,536 98 69
2012 20,145 145 20,290 107 73
2013 21,823 137 21,960 114 75
2014 18,042 139 18,181 94 62
2015 16,539 141 16,680 85 57
2016 16,938 133 17,071 87 57
2017 17,894 151 18,046 91 61
2018 17,689 146 17,835 90 58
2019 17,832 145 17,977 92 60
2020 19,277 110 19,387 97 66
2021 17,165 117 17,282 87 57
2022 16,237 97 16,334 83 56
2023 16,293 112 16,405 84 57
2024 17,196 89 17,284 88 61
Abbreviations:
AFY = acre-feet per year
GPCD = gallons per capita per day
R-GPCD = residential gallons per capita per day
Notes:
(a) Water use data are based on water production data provided by City staff. Recycled water use includes only urban irrigation uses. Numbers may be rounded. (b) Totals may not sum due to rounding.
(c) Total per capita water use is calculated by dividing the annual water use by service area population (see Section 4) and the number of days in a year. (d) Residential per -capita water use is calculated by dividing the annual residential water use by service area population and the number of days in a year. (e) Recycled water use in 2010 was significantly higher than in other years and has been excluded from the analysis presented herein due to its anomalous nature. Santa Rosa’s urban reuse system customers came online in 2010. Since then, ongoing monitoring and inspections by City staff have enabled users to identify and respond to high use, system breaks, and leaks. These efforts have supported more efficient irrigation practices across the system.
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Figure 3-1 Total Water Production and Per Capita Water Use
Abbreviations:
AFY = acre-feet per year
GPCD = gallons per capita per day
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Table 3-2 Annual Water Use by Customer Sector
Water Use
Sector
Water Use (a) (AFY)
2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 Single Family 9,865 9,826 10,613 10,940 9,006 8,186 8,365 9,008 8,578 8,745 9,863 8,449 7,958 7,983 8,562 Multi-Family 3,208 3,191 3,308 3,390 3,073 2,910 2,924 2,979 2,966 2,978 3,309 2,984 3,078 3,261 3,438 Commercial 2,137 2,277 2,386 2,500 2,340 2,161 2,142 2,191 2,193 2,165 2,020 2,078 2,046 2,035 2,056 Industrial 220 223 234 285 268 251 283 262 309 299 304 320 307 328 326 Institutional 357 341 392 407 376 346 342 348 341 372 308 276 300 297 313 Irrigation 1,611 1,627 2,018 2,104 1,729 1,593 1,609 1,863 1,868 1,887 1,991 1,482 1,224 1,286 1,590 Other (b) 31 26 45 37 50 59 75 58 102 72 93 109 114 71 81 Recycled (c) (d) 98 145 137 139 141 133 151 146 145 110 117 97 112 89 Total Water
Consumption 17,398 17,583 19,095 19,765 16,934 15,590 15,800 16,804 16,402 16,592 17,906 15,708 15,010 15,304 16,377 Non-Revenue
Water (e)
2,030 954 1,194 2,196 1,247 1,090 1,271 1,241 1,433 1,385 1,481 1,574 1,324 1,101 908
10.4% 5.1% 5.9% 10.0% 6.9% 6.5% 7.4% 6.9% 8.0% 7.7% 7.6% 9.1% 8.1% 6.7% 5.3% Total Water
Demand (f) 19,428 18,536 20,290 21,960 18,181 16,680 17,071 18,046 17,835 17,977 19,387 17,282 16,334 16,405 17,284 Abbreviations:
AFY = acre-feet per year
Notes:
(a) Water use data are based on water production data provided by City staff. (b) Water use in the “Other” sector includes use from firelines, construction, and yard meters. Yard meters record a combination of potable and recycled water use, where recycled water makes up approximately 4% of total use. Annual water use records from yard meters are reduced by 4% to estimate the approximate potable water use. (c) Recycled water use includes only urban landscape irrigation uses (no agricultural uses). (d) Recycled water use in 2010 was significantly higher than in other years and has been excluded from the analysis presented herein due to its anomalous nature. (e) Non-revenue water is calculated as the difference between total production and total consumption. (f) Totals may not sum due to rounding.
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Figure 3-2 Annual Water Use by Customer Sector
Abbreviations:
AFY = acre-feet per year
CII = commercial, industrial, and institutional
Figure 3-3 Proportional Water Use by Customer Sector in 2024
Abbreviations:
CII = commercial, industrial, and institutional
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3.2 Water Use Trends by Customer Sector
This section discusses long-term trends in both total water use and per-account water use across customer sectors from 2010 to 2024. Figure 3-4 shows monthly water use with 12-month moving averages. Figure 3-5 summarizes annual water use per account . And Table 3-3 provides water use per customer sector . In total, these results provide insight into how each sector has responded to drought conditions, economic changes, and shifts in demographics. • SFR and MFR: Total water use in the SFR sector has slightly declined between 2010 and 2024, whereas total water use i n the MFR sector has slightly increased. Within both sectors, there are notable peaks during 2013 and 2020, reductions during drought periods, and partial rebounds after the droughts. The reductions during the 2014-2017 and 2021- 2023 drought periods are accompanied by diminished seasonality (Figure 3-4) that reflects likely reductions in outdoor irrigation in response to water use restrictions.
The average per-account water use was highest in 2013 and rose again in 2020 during the COVID-19 pandemic. Per-account use has begun to rebound in 2023 -2024, and current levels are comparable to those seen in 2017-2019.
• CII Total: The CII sectors exhibited significant declines in both total and per account use in response to the 2014-2017 drought and COVID. These shifts may be tied to long-term changes in business activity and employment in the City, with reduced water demand persisting through 2024.
• Irrigation: The irrigation sector showed reductions during drought years , with a steeper decline during 2020-2022. Per account water use shows signs of a partial rebound in 2023- 2024 but remains lower than in 2017 -2019. Generally, there was a stronger rebound in the irrigation sector compared to others.
• Other: Per account water use for accounts in the Other category show an overall increasing trend between 2010 and 2024 with short-term fluctuations. • Recycled water: Recycled water use has remained relatively steady in total volume over time, although water use has fluctuated slightly. Recycled water use peaked in 2018 and reached a low in 2024. These trends reflect seasonal irrigation patterns, changes in site operations, and ongoing monitoring and oversight by City staff to support efficient system performance.
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Figure 3-4 Monthly Water Use and 12-Month Moving Average
Notes:
Monthly water use was not available for accounts in the “Other” sector, which includes firelines, construction, and yard meters.
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Table 3-3 Average Per-Account Water Use by Customer Sector Water Use Sector
Water Use per Account (GPD/Account)
2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 Single Family
Residential 200 201 216 222 182 165 168 175 171 173 194 165 155 155 165 Multi-Family
Residential (a) 915 909 943 968 878 832 833 845 840 839 876 782 790 809 834 CII Total (b) 839 876 929 982 918 850 852 861 871 867 803 820 812 816 827 Irrigation 848 867 1,068 1,146 955 885 901 1,039 1,032 1,031 1,190 877 723 747 915 Other (c) 24 20 34 28 37 43 54 41 74 48 60 69 70 44 54
Recycled Water (d) (e) 3,014 4,311 4,076 4,135 4,199 3,949 4,497 4,492 4,789 3,640 3,867 3,208 3,707 2,933 Abbreviations:
GPD = gallons per day
Notes:
(a) The water use per account for multi-family residential customers measures water use at the master meter level, which can serve multiple units or the entire complex. This does not reflect water use per dwelling unit, as many properties are not individually submetered. (b) Based on the total water use and number of accounts across all CII sectors. (c) “Other” accounts include firelines, construction, and yard meters. (d) Recycled water use includes only urban landscape irrigation uses (no agricultural uses). (e) Recycled water use in 2010 was significantly higher than in other years and has been excluded from the analysis presented herein due to its anomalous nature.
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Figure 3-5 Average Per-Account Water Use by Customer Sector
Abbreviations:
CII = commercial, industrial, and institutional
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3.3 Estimated Indoor and Outdoor Water Use
Water use within the City varies seasonally, primarily driven by increased irrigation needs in the summer compared to the more limited irrigation water use during the wetter and cooler winter months. The most pronounced seasonal fluctuations occur in the dedicated irrigation and recycled water sectors, which record water use from dedicated irrigation meters of MFR and CII customers and where water use is limited to outdoor irrigation . In these sectors, water use is minimal during the winter.
In contrast, SFR, MFR, and the combined CII sectors of mixed-use meters record both indoor and outdoor water demand. In the SFR sector, summer water use is double that of winter water use.
The MFR and CII sectors, which usually have separate dedicated irrigation meters, show less seasonality, with summer water use about 28% and 37% higher than winter water use , respectively.
It is important to note that many MFR and CII customers have dedicated irrigation meters that are included in the irrigation sector, not within the MFR and CII mixed -use sectors. Some MFR and CII accounts are mixed -use intentionally and others of these accounts simply use their domestic meter for irrigation inadvertently. As a result, the outdoor water use estimated for MFR and CII sectors in this section (Section 3.3) reflects only the portion of irrigation that remains on the domestic or mixed-use accounts. Some CII industries, such as restaurants, manufacturing, or facilities with cooling needs, may also experience seasonal variation in indoor water use, contributing to the modest increase in CII summer demands.
A Seasonal Adjustment Method is used to estimate the relative proportions of water use that are used indoors versus outdoors in non-irrigation sectors. The methodology is further described in Appendix A. The results of this estimate are shown on Figure 3-8 for 2024 and on Figure 3-7 for 2017 through 2024, which includes periods before and after the recent drought.
Outdoor water use has varied across customer sectors over the past eight years, with the single- family sector having the highest proportion of outdoor use . SFR outdoor use has fluctuated between 31% and 46% of total SFR water use, peaking in 2019-2020. Outdoor water use in MFR mixed-use meters has remained much lower, typically in the 15-20% range, with a notable low in 2018 (6%) followed by stabilization in recent years 2. Outdoor water use in CII mixed use meters has been more volatile, ranging from 2% to 24%, with an anomalous drop in 2020 and higher levels since 2021. Across all sectors with mixed use meters, outdoor use generally remained in the mid-20% to low-30%, reflecting overall reductions in 2021 and steady recovery in the years that followed.
A closer look at 2024 conditions shows that, aside from the dedicated irrigation and recycled sectors (100% outdoor use), SFR water use had the highest proportion of outdoor use at 39%, followed by the CII sector of mixed-use meters at 23%, and the MFR sector of mixed-use meters at 20%. The lower outdoor percentage for the MFR sector corresponds to the lesser seasonality
2 Only mixed-use meters under MFR accounts are accounted for in this analysis. Therefore, the outdoor percentages are likely an underestimate of total MFR outdoor water use. Outdoor water use recorded on MFR dedicated irrigation meters typically represents an additional 7% of total MFR water use.
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observed in this sector. These values should be interpreted with the understanding that a substantial portion of MFR and CII landscape irrigation is already captured in the irrigation sector through dedicated irrigation meters. Given their landscape-only demands, MFR and CII dedicated irrigation accounts represent meaningful opportunities for outdoor conservation programs.
Figure 3-6 Average Monthly Water Use, 2010-2024
Abbreviations:
AFY = acre-feet
CII = commercial, industrial, and institutional
Figure 3-7 Indoor and Outdoor Water Use Percentages by Sector, 2017-2024
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Figure 3-7 Indoor and Outdoor Water Use Percentages by Sector, 2017-2024 (Continued)
Abbreviations:
CII = commercial, industrial, and institutional
8 81 85 8 81 80
11 1 1 15 1 1 0
0 500
1,000
1,500
,000
,500
,000
,500
,000
01 018 01 0 0 0 1 0 0 0
Water se (A )
Mul amily Water se by ear
ndoor Water se Outdoor Water se
8 8 80 8
8 1 11 0
1 0
500
1,000
1,500
,000
,500
,000
01 018 01 0 0 0 1 0 0 0
Water se (A )
C Water se by ear
ndoor Water se Outdoor Water se
1 5 8 1 8
5 0
,000
,000
,000
8,000
10,000
1 ,000
1 ,000
1 ,000
18,000
01 018 01 0 0 0 1 0 0 0
Water se (A )
Total Water se by ear
ndoor Water se Outdoor Water se
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Figure 3-8 Estimated Indoor and Outdoor Water Use, 2024
Abbreviations:
CII = commercial, industrial, and institutional
3.4 Distribution of Residential Water Use
To further understand water use patterns within the residential sector, a statistical analysis of the most current (2024) water use data was performed. This analysis informed the development of the spatial distribution map in Section 3.4 and provides insights on the water savings potential by residential customers. Figure 3-9 and Table 3-4 show the distribution of estimated indoor and outdoor water use and the median water use value. Further observations are described below:
• The median indoor water use for SFR customers is estimated to be 62 gallons per day per unit (gpd/unit), and the average is estimated to be 83 gpd/unit. The average is significantly higher than the median because the average value is sensitive to customers with exceptionally high -water use . Thus, the median is a better representation of the overall water use patterns within the City’s service area (i.e., half of the customers are estimated to have a lower indoor water use than 62 gpd/unit). • The median indoor water use for MFR customers (64 gpd/unit) is almost identical to that of SFR customers, although the 25th percentile indoor use for SFR customers (33 gpd/unit) is somewhat lower than that of MFR customers ( 42 gpd/unit). This suggests that some single-family households may be achieving very low indoor water use levels, potentially reflecting smaller household sizes or highly efficient fixtures. Nevertheless, the overall
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similarity in median values between customer classes indicates a common typical range of indoor use, suggesting that remaining indoor conservation potential may be limited. • For MFR customers, the median indoor water use was 64 gpd/unit, while the average is estimated at 74 gpd/unit. The relatively close alignment of the median and average values indicates less variability in indoor water use compared to SFR customers and limited indoor conservation potential for MFR customers.
• The median outdoor water use of SFR customers is estimated to be 58 gpd/unit, while the average is slightly higher at 82 gpd/unit. The relatively broad distribution of outdoor water use (with a 75th percentile of 113 gpd/unit and a standard deviation of 74 gpd/unit) indicates substantial variability in irrigable landscape areas and irrigation practices among SFR customers. These data suggest that water conservation programs that target outdoor water use , particularly for higher -using customers, could provid e significant water savings.
• MFR accounts typically serve shared irrigated areas across multiple units; as of 2024, the average MFR account serves 6.9 units. On a per -unit basis 3, the median MFR outdoor water use is 24 gpd/unit, with an average of 39 gpd/unit. On a per -account basis, the median outdoor use for MFR customers is 30 gpd/account and the average use is 80 gpd/account. The fact that per-account outdoor use does not scale proportionally with the number of units served suggests diminishing marginal increases in the total irrigated area or more efficient irrigation practices at larger MFR properties. While overall outdoor use among MFR customers is lower, larger MFR accounts remain good candidates for outdoor-focused conservation programs. The potential for outdoor water savings in the general MFR sector is likely comparable to that of the SFR sector on a per-account basis.
3 Multi-family dedicated irrigation accounts are included in this analysis and directly added as outdoor water use.
Section 3 2025 Demand & Conservation Update
Water Use Characteristics City of Santa Rosa
19 December 2025
3-15 EKI C40180.00
Figure 3-9 Distribution of Residential Indoor and Outdoor Water Use in 2024
Section 3 2025 Demand & Conservation Update
Water Use Characteristics City of Santa Rosa
19 December 2025
3-16 EKI C40180.00
Table 3-4 Summary of Distribution of Residential Indoor and Outdoor Water Use in 2024 Statistical Summary
Estimated Indoor
Water Use
(gpd/unit)
Estimated Outdoor
Water Use
(gpd/unit)
Total Water Use
(gpd/unit)
SFR (a)
25th Percentile 33 29 99
Median 62 58 145
75th Percentile 115 113 211
Average 83 82 165
Standard Deviation 61 74 89
MFR (a)(b)(c)
25th Percentile 42 12 70
Median 64 24 99
75th Percentile 97 48 141
Average 74 39 113
Standard Deviation 49 45 63
Abbreviations:
MFR = multi-family residential
gpd/unit = gallons per day per unit
SFR = single family residential
Notes:
(a) The table shows statistical summaries of customer billing data by excluding outliers (i.e., water usage in the highest one percent) and customers that were inactive in any month. Since outliers affect averages and standard deviations but not the 25th percentile, the median, and the 75th percentile, the median is a better representation of the overall water use patterns of the City’s customers.
(b) Includes both regular and irrigation meters within the duplex and multi-family account types. (c) Water use for each MFR account was normalized by the number of units presented in the customer-level billing data. If the number of units was not available, a unit of 1 was assumed.
3.5 Spatial Distribution of Residential Water Use Across the City Service Area Figure 3-10 shows spatial distribution of the total residential water use by residential customers (i.e., SFR and MFR customers). The median water use is presented by both grid cells to show the general water use characteristics in different portions of the City. Most customers with high total water use are located in the north and northeastern portions of the City (i.e., in the near the hillside suburban areas) and near the southern boundary of the City. Most customers with the lowest total water use are located near the central City and downtown area.
Section 3 2025 Demand & Conservation Update
Water Use Characteristics City of Santa Rosa
19 December 2025
3-17 EKI C40180.00
3.6 Estimated Residential Per Capita Indoor Water Use
Table 3-5 shows the calculations to estimate the indoor residential gallons per capita per day (R-GPCD) from 2017 to 2024 within the City’s service area. Figure 3-11 further illustrates the estimated indoor R-GPCD.
Table 3-5 and Figure 3-11 show that the City’s indoor GPCD was relatively steady over this period, ranging between 40 and 42 GPCD except for a temporal low in 2019. The City’s current estimated indoor R -GPCD is lower than the UWUO residential indoor water use standard through 2040 (42 GPCD) as described in Section 2.2.1.
s,topol
L - -
Legend
2 (Scale in Miles)
c::::J Santa Rosa Boundary
Total Water Use (gal/day/unit)
'e - 0 - 70
3! - 70-100
o5
al D 100 - 150
� D 1so - 200
- D 200- 300
� - 300-400co
0 y - > 500
x
4 Rohnert Park
Cot ti
Notes
Sonoma
State
Unn.ersrl),
1. All locations are approximate.
Tron Annadel
� ate Park
2. For purposes of visualizing and presenting these data, total water use is presented as the median water use of all residential customers wrth valid AMI data located within a grid cell and reported rn gpd per unrt.
Grid size is 1,000 ft X 1,000 ft.
Abbreviations
gal= gallon
gpd = gallons per day
Sources
1. Basemap is ESRl's ArcGIS
Online world topographic map,
obtained 12 August 2025 .
Spatial Distribution of
Residential Total Water Use
Sonoma-Marin Saving Water Partnership
Santa Rosa, CA
December 2025
EKI C40180.00
Figure 3-10
Section 3 2025 Demand & Conservation Update
Water Use Characteristics City of Santa Rosa
19 December 2025
3-19 EKI C40180.00
Table 3-5 Estimated Residential Per Capita Indoor Water Use Year
Water Use
(AFY)
Indoor Water
Use Percentage
Total Indoor
Residential
Water Use
(AFY)
Population
Estimated
Indoor
R-GPCD (a) SFR MFR SFR MFR
2017 9,008 2,979 60% 89% 8,088 176,688 41
2018 8,578 2,966 66% 94% 8,409 177,202 42
2019 8,745 2,978 54% 81% 7,156 175,183 36
2020 9,863 3,309 56% 79% 8,097 178,059 41
2021 8,449 2,984 69% 85% 8,390 177,623 42
2022 7,958 3,078 67% 86% 7,940 175,007 41
2023 7,983 3,261 64% 81% 7,758 175,013 40
2024 8,562 3,438 61% 80% 7,962 174,890 41
Abbreviations:
AFY = acre-feet per year
R-GPCD = residential gallon per capita per day
Note:
(a) The estimated indoor R -GPCD is calculated from historical SFR and MFR water use from Table 3-2 estimated indoor water use percentages estimated on Figure 3-7, and population from Table 5-2.
Figure 3-11 Estimated Residential Per Capita Indoor Water Use
Abbreviations:
R-GPCD = residential gallon per capita per day
Notes:
1 1 1 0 1
0 5
10 15
0 5
0 5
0 5
01 018 01 0 0 0 1 0 0 0
Residen al Per Capita ndoor
Water se (R PC )
Section 3 2025 Demand & Conservation Update
Water Use Characteristics City of Santa Rosa
19 December 2025
3-20 EKI C40180.00
(a) The estimated indoor R-GPCD is calculated by total indoor residential water use from Table 3-5 and population from Table 5-2.
Section 4 2025 Demand & Conservation Update
Conservation Program Participation City of Santa Rosa
19 December 2025
4-1 EKI C40180.00
4 CONSERVATION PROGRAM PARTICIPATION
This section evaluates past participation in water conservation programs by City customers, including historic program participation and estimated water savings associated with program participation. The purpose of this section is to inform future program selection and implementation and support the demand management measure (DMM) reporting required in the UWMP under CWC § 10631(e).1
For six water conservation programs selected by the City, additional analyses have been conducted, including (1) a refined estimate of the actual water conservation savings achieved by City customers based on customer billing data (Section 4.3.2), and (2) an assessment of program participation trends in relation to spatial distribution (Section 4.4), property characteristics (Section 4.5), and customer demographics (Section 4.6). The following six programs were included in the detailed analyses:
1. SFR Cash for Grass Rebate Program*
2. SFR WaterSmart Check-up (Indoor) Program*
3. SFR WaterSmart Check-up (Outdoor) Program*
4. CII and MFR Cash for Grass Rebate Program*
5. CII WaterSmart Check-up (Indoor) Program
6. CII and MFR WaterSmart Check-up (Outdoor) Program
The goals of these more detailed analyses are to identify participation drivers and to help the City better understand which customers are participating in which programs. The City can accordingly use this information to inform the strategic design, select ion, and marketing of future conservation programs and services.
our of the programs (marked with an asterisk “*”) were also analyzed in the 2020 Water Demand Analysis and Water Conservation Measure Update (2020 Report; EKI, 2020). This report provides an update to that earlier analysis by extending water savings estimates for these programs through more recent years and focusing on participation trends based on data collected from 2020 through 2024.
4.1 Conservation Programs
The description of water conservation programs, eligible customer classes, and program run dates provided by the City to their customers is summarized in Table 4-1 below. The City currently implements 20 conservation programs offered directly to customers.
1 The information presented herein supports a portion of the required DMM analysis, focusing on device and education-focused programs. Additional details regarding customer billing rates and structure, conservation staffing levels, customer metering, etc. are required under CWC § 10631(e), but not addressed herein.
Section 4 2025 Demand & Conservation Update
Conservation Program Participation City of Santa Rosa
19 December 2025
4-2 EKI C40180.00
Table 4-1 Description of Conservation Programs
Program Description
Eligible
Customer
Class(es)
Program Run
Dates
HECW Rebate
Program
Rebate for upgrading to an eligible high-
efficiency clothes washer(s).
MFR, CII
(Indoor) 1998-Current
WaterSmart
Check-up
(Indoor)
Program Site visit to review indoor water consumption
patterns, fixtures, meter reading, irrigation
schedule, best practices, etc.
SFR (Indoor) 2012-Current
SFR
WaterSmart
Check-up
(Outdoor)
Program
SFR (Outdoor) 2012-Current
Cash for Grass
Rebate
Program
Rebate per square foot for removing lawn and
replacing it with low-water-use landscaping.
SFR, MFR, CII
(Outdoor) 2007-Current
Irrigation
Efficiency
Rebate
Rebate for upgrading to high-efficiency
irrigation equipment (materials only, not
labor). This can be for a variety of materials,
including weather-based timers, pressure
reducers, spray bodies, etc.
SFR (Outdoor) 2006-Current
Irrigation
Efficiency
Rebate
CII/MFR
(Outdoor) 2006-Current
Large
Landscape
WaterSmart
Check-up
Program
Site visit to review outdoor consumption
patterns, fixtures, meter reading, irrigation
schedule, best practices, etc.
CII/MFR
(Outdoor) 2012-Current
Pool Cover
Rebate
Rebate for purchasing and installing a pool
cover.
SFR (can
include
CII/MFR)
(Outdoor)
2022-Current
Rainwater
Harvesting
Rebate
Rebate for installing a rainwater harvesting
system.
SFR (can
include
CII/MFR)
(Outdoor)
2009-Current
Section 4 2025 Demand & Conservation Update
Conservation Program Participation City of Santa Rosa
19 December 2025
4-3 EKI C40180.00
Table 4-1 Description of Conservation Programs (Continued) Program Description
Eligible
Customer
Class(es)
Program Run
Dates
Recirculating
Hot Water
Pump Rebate
Rebate for installing an eligible hot water
recirculating pump.
SFR (can
include
CII/MFR)
(Indoor)
2014-2023
High Efficiency
Toilet Rebate
Rebate for upgrading to high-efficiency
toilet(s).
SFR, MFR, CII
(Indoor)
2007-2010
2023-Current
High Efficiency
Urinal Rebate Rebate for upgrading to high-efficiency urinals.
CII (can include
MFR/SFR)
(Indoor)
2009-Current
Efficient
Fixture Direct
Install
Program
Direct installation of toilets, showerheads, and
aerators at SFR and MFR sites, and toilets and
aerators at CII sites, at no cost to the customer.
SFR, MFR, CII
(Indoor)
2016-2017
2022-Current
Greywater
Reuse
Rebate for installing a graywater system. This
system uses specific indoor water for irrigation,
which means it is likely only saving water
during irrigation months.
SFR (can
include
CII/MFR) (Both)
2010-Current
Sustained
Reduction
Rebate for installing any equipment or
technology that the City does not already have
a rebate for, which results in a sustained water
reduction (materials only, not labor).
CII, MFR, SFR
(Both) 2000-Current
WaterSmart
Check-up
(Indoor)
Program Site visit to review indoor water consumption
patterns, fixtures, meter reading, irrigation
schedule, best practices, etc.
MFR (Indoor) 2012-Current
WaterSmart
Check-up
(Indoor)
Program
CII (Indoor) 2012-Current
Section 4 2025 Demand & Conservation Update
Conservation Program Participation City of Santa Rosa
19 December 2025
4-4 EKI C40180.00
Table 4-1 Description of Conservation Programs (Continued) Program Description
Eligible
Customer
Class(es)
Program Run
Dates
Take it From
The Tap!
School
Education
Program
(City of
Santa Rosa)
Classroom Education Program for K-12. Lesson
plan educates students on the safety, health,
environmental, and cost benefits of choosing
tap water. Reusable water bottles are given to
each student as a tool to help them remember
to choose tap water first. Program material
access is provided to cities within the SMSWP.
City interns tailor the material for the
appropriate age group.
All 2016-Current
Abbreviations:
CII = Commercial, Industrial, and Institutional
HECW = High-Efficiency Clothes Washer
gpf = gallons per flush
MFR = Multi-Family Residential
SFR = Single-Family Residential
sq ft = square feet
In addition to programs offered by the City, several regional programs are offered through the SMSWP, including: (1) education and outreach to schools, (2) public outreach and educational workshops, (3) Qualified Water Efficient Landscaper (QWEL) Training, and (4) garden tours.
4.2 Historical Conservation Program Participation
Table 4-3 summarizes participation in the City’s conservation programs from 1998 through 2024.
Darker shading indicates higher participation values. The tab le shows the total number of participants in each program as a percentage of the total number of accounts in the predominant sector. This percentage serves as a measurement of program saturation (i.e., how extensively the program has been adopted within the target customer base ) and whether there remains future potential from the program. Figure 4-1 further illustrates the data included in Table 4-3, showing the participation by end use, sector group, or program categories, and turf replacement square footage over time.
Among the programs offered by the City, the programs that reached the largest number of customers and their respective sector participation rates included:
• CII WaterSmart Check-up (Indoor), 98% of the CII sector;2 • Residential High-Efficiency Clothes Washer (HECW) Rebate, 32% in the SFR sector; • CII/MFR WaterSmart Check-up (Outdoor), 14% in the MFR and CII sectors;2 and
2 Participation percentages are based on the total number of accounts in each sector, but it should be noted that some customers have participated in programs multiple times, particularly the check-ups, while others have not participated at all. As a result, the percentage is approximate and may not reflect exact participation.
Section 4 2025 Demand & Conservation Update
Conservation Program Participation City of Santa Rosa
19 December 2025
4-5 EKI C40180.00
• CII/MFR HECW Rebate Programs, 17% in the MFR and CII sectors.
Participation in the CII WaterSmart Check-up (Indoor) Program was slow to start, with significant adoption in 2016 and 2017 , followed by stable participation in recent years. The Residential HECW Rebate Program experienced early and steady adoption, but participation has greatly declined over time. The CII/MFR WaterSmart Check-up (Outdoor) has shown fluctuations and has remained relatively stable in the past two years. Participation in the C II/MFR HECW Rebate Program increased steadily early on, followed by a decline, with no participation in the past five years.
As shown on Figure 4-1, graph A, participation in outdoor programs has remained stable over time whereas participation in indoor programs has decreased, with a large drop around 2017, but is starting to trend upward. Participation from the CII sector (graph B) has been trending low over the past four years, while residential participation has been trending upward. Participation in the turf replacement programs (graph C) has varied over time and has had the highest popularity during initial program implementation and drought periods. Looking at all programs per program category, most programs have a low adoption rate over the recent five years ; however, WaterSmart Check-ups (Audits & Reports program category) are remaining steady, and High-Efficiency Toilet ( HET) programs are trending upward largely due to the Efficient Fixture Direct Install Program that commenced in 2022 and continues to the present.
Table 4-2 summarizes participation in the regional SMWSP water conservation direct instruction school education and outreach programs from the 2020-2021 through 2024-2025 school years.
Over this period, 29,058 students were reached by direct instruction . Additional students were reached through indirect instruction such as assemblies, video and poster contests, and other educational materials.
Table 4-2 Participation in SMSWP School Education Programs, Direct Instruction Grade Level
Number of Students Reached by School Year
2020-2021 2021-2022 2022-2023 2023-2024 2024-2025
Kindergarten - 376 472 707 1,250
1st – 3rd Grade 497 501 810 2,298 3,796
4th – 5th Grade 1,505 1,560 2,041 2,123 1,901
Middle/High School 374 729 3,096 3,264 1,670
Other - - - 88 -
Total 2,376 3,166 6,419 8,480 8,617
Section 4 2025 Demand & Conservation Update
Conservation Program Participation City of Santa Rosa
19 December 2025
4-6 EKI C40180.00
4.3 Estimated Savings from Past Conservation Programs
4.3.1 Water Savings Based on AWE Model
The Alliance for Water Efficiency ( AWE) model3 was used to estimate water savings associated with the implementation of all device or turf replacement and Water Smart Checkup programs identified in Table 4-3 for the period of 2010 to 2024. Water savings estimates were based on AWE model default values and other literature values as needed. The specific assumptions used in this assessment are presented in Appendix B. The results of this analysis are presented in Table 4-4 and illustrated on Figure 4-2. It is estimated that conservation programs included in this assessment resulted in active savings of 12,016 AF between 2010 and 2024.
As shown on Figure 4-2, the most successful program types in terms of estimated savings include the following, listed in order of savings:
• Audits & Reports (WaterSmart Check-ups),
• Irrigation Systems & Devices (Irrigation Efficiency Rebate Program), • Clothes Washers (Residential and Commercial HECW Rebate Programs), • Turf Replacement (Cash for Grass Rebate Programs), and • HET (HET Rebate and Efficient Fixture Direct Install Programs).
In addition, over this period , it is estimated that 1,920 AF was saved through passive savings .4 Thus, total active and passive savings are estimated to be 13,936 AF.
3 Alliance for Water Efficiency, Water Conservation Tracking Tool Version 4.3. 4 Passive water savings are water savings associated with the natural replacement of water-using fixtures and devices with higher efficiency ones, due to plumbing code and market changes. Passive savings are estimated for the whole service area.
Table 4-3 Summary of Conservation Program Participation City of Santa Rosa, Sonoma-Marin Water Saving Partnership Number of Program Participants Number
Sector (a) Indoor/
Outdoor
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
HECW Rebate Program MFR, CII Indoor Clothes Washers 24 53 33 12 41 69 75 76 76 54 79 66 81 52 31 30 19 10 4 1 3 2 HECW Rebate Program SFR Indoor Clothes Washers 482 647 451 104 486 981 920 1,175 1,231 1,221 1,460 1,077 1,243 794 607 647 361 178 137 61 50 36 WaterSmart Check-up (Indoor) Program SFR Indoor Audits & Reports - - - - - - - - - - - - - - 26 186 261 122 541 1,009 202 142 WaterSmart Check-up (Outdoor)
Program SFR Outdoor Audits & Reports - - - - - - - - - - - - - - 9 145 269 96 92 64 118 86 WaterSmart Check-up (Indoor) Program MFR Indoor Audits & Reports - - - - - - - - - - 5 14 17 17 8 27 32 25 68 144 6 3 WaterSmart Check-up (Indoor) Program CII Indoor Audits & Reports - - - - - - - - - - - - - - 31 31 31 139 607 1,079 219 150 WaterSmart Check-up (Outdoor)
Program MFR, CII Outdoor Audits & Reports - - - - - - - - - - - - - - 13 165 294 104 97 71 126 87 Irrigation Efficiency Rebate SFR Outdoor Irrigation Systems & Devices - - - - - - - - 40 161 382 227 124 55 51 80 49 29 10 10 6 1 Irrigation Efficiency Rebate MFR, CII Outdoor Irrigation Systems & Devices - - - - - - - - - 14 33 36 51 18 18 7 15 16 11 0 0 4 Pool Cover Rebate SFR, MFR,
CII Outdoor Pools & Fountains - - - - - - - - - - - - - - - - - - - - - - Rain Water Harvesting Rebate SFR, MFR,
CII Outdoor Rainwater Harvesting - - - - - - - - - - - 1 4 2 3 2 13 43 25 6 2 1 Recirculating Hot Water Pump Rebate SFR, MFR,
CII Indoor Cooling & Heating
Systems - - - - - - - - - - - - - - - - 29 70 28 18 10 10 High Efficiency Toilet Rebate SFR, MFR,
CII Indoor HET - - - - - - - - - 152 245 481 207 - - - - - - - - - Efficient Fixture Direct Install Program
Residential SFR, MFR Indoor HET - - - - - - - - - - - - - - - - - - 510 1,060 - - Efficient Fixture Direct Install Program
Commercial CII Indoor HET - - - - - - - - - - - - - - - - - - - - - - Greywater Rebate SFR, MFR,
CII Both Greywater - - - - - - - - - - - - 2 17 21 3 3 8 1 2 - - Sustained Reduction CII, MFR,
SFR Both Other - - 1 2 1 0 3 2 0 0 1 2 0 6 8 3 4 5 2 6 0 2 High Efficiency Urinal Rebate CII, MFR,
SFR Indoor Urinal (0.125 gpf) - - - - - - - - - - - - 6 0 0 1 1 1 0 4 0 0 Total Turf Removed (square feet) Total Turf
Cash for Grass Rebate Green Exchange
Program SFR Outdoor Turf Replacement - - - - - - - 1,488 109,098 185,113 291,934 212,486 124,001 114,519 99,243 272,304 476,238 279,288 21,326 23,629 9,359 744 Cash for Grass Rebate Green Exchange
Program MFR, CII Outdoor Turf Replacement - - - - - - - - 53,969 171,118 94,679 86,306 54,127 80,315 37,580 64,955 108,223 103,360 6,436 5,000 12,045 0 Rainwater Storage Installed (gallons) Rainwater
Rain Water Harvesting Rebate SFR, MFR,
CII Outdoor Rainwater Harvesting - - - - - - - - - - - - - - - - - - - - - - Active AMI Meters Ac
AMI Leak Notifications Program All Both Leaks and Water Losses - - - - - - - - - - - - - - - - - - 4 6,895 32,738 39,999 Program Name
End Use
Program Category
EKI C40180.00 4-7
EKI Environment Water, Inc.
December 2025
Table 4-3 Summary of Conservation Program Participation City of Santa Rosa, Sonoma-Marin Water Saving Partnership Sector (a) Indoor/
Outdoor
HECW Rebate Program MFR, CII Indoor Clothes Washers
HECW Rebate Program SFR Indoor Clothes Washers
WaterSmart Check-up (Indoor) Program SFR Indoor Audits & Reports WaterSmart Check-up (Outdoor)
Program SFR Outdoor Audits & Reports
WaterSmart Check-up (Indoor) Program MFR Indoor Audits & Reports WaterSmart Check-up (Indoor) Program CII Indoor Audits & Reports WaterSmart Check-up (Outdoor)
Program MFR, CII Outdoor Audits & Reports
Irrigation Efficiency Rebate SFR Outdoor Irrigation Systems & Devices
Irrigation Efficiency Rebate MFR, CII Outdoor Irrigation Systems & Devices
Pool Cover Rebate SFR, MFR,
CII Outdoor Pools & Fountains
Rain Water Harvesting Rebate SFR, MFR,
CII Outdoor Rainwater Harvesting
Recirculating Hot Water Pump Rebate SFR, MFR,
CII Indoor Cooling & Heating
Systems
High Efficiency Toilet Rebate SFR, MFR,
CII Indoor HET
Efficient Fixture Direct Install Program
Residential SFR, MFR Indoor HET
Efficient Fixture Direct Install Program
Commercial CII Indoor HET
Greywater Rebate SFR, MFR,
CII Both Greywater
Sustained Reduction CII, MFR,
SFR Both Other
High Efficiency Urinal Rebate CII, MFR,
SFR Indoor Urinal (0.125 gpf)
Total Turf Removed (square feet)
Cash for Grass Rebate Green Exchange
Program SFR Outdoor Turf Replacement
Cash for Grass Rebate Green Exchange
Program MFR, CII Outdoor Turf Replacement
Rainwater Storage Installed (gallons)
Rain Water Harvesting Rebate SFR, MFR,
CII Outdoor Rainwater Harvesting
Active AMI Meters
AMI Leak Notifications Program All Both Leaks and Water Losses Program Name
End Use
Program Category
Number of Program Participants
2020
2021
2022
2023
2024
Total
- - - - - 891 13.9%
46 34 58 37 29 14,553 31.5%
82 25 158 116 101 2,971 6.4%
60 209 131 119 110 1,508 3.3%
0 10 9 0 2 387 11.0%
8 31 26 31 19 2,846 97.8%
4 45 30 22 22 1,080 16.8%
11 15 27 24 14 1,316 2.8%
1 5 5 15 2 251 3.9%
- - 11 7 2 20 0.0%
4 8 13 21 12 160 0.3%
4 8 24 7 1 209 0.4%
- - - 24 14 1,123 2.1%
- - 0 644 712 2,926 5.9%
- - 0 0 217 217 0.4%
0 2 3 3 1 66 0.1%
1 0 0 2 0 51 0.1%
3 1 3 0 0 20 0.0%
Total Turf Removed (square feet)
22,872 82,378 132,135 146,109 47,107 2,651,371 -
3,155 69,034 125,945 107,876 31,254 1,215,377 -
Rainwater Storage Installed (gallons)
12,413 8,366 17,960 30,434 21,370 90,543 -
Active AMI Meters
45,745 46,028 46,037 46,037 46,038 46,038 (d) Pct. of
Accounts
(b)
EKI C40180.00 4-8
EKI Environment Water, Inc.
December 2025
Table 4-3 Summary of Conservation Program Participation City of Santa Rosa, Sonoma-Marin Water Saving Partnership Abbreviations
AMI = advanced meter infrastructure
CII = Commercial, Industrial, Institutional
MFR = Multi-Familiy Residential
HECW = High Efficiency Clothes Washer
SFR = Single-family residential
Notes
(a) Predominant sector for program participants.
(b) Participation is calculated as a percentage of total accounts of the predominant sector indicated. (c) Colored shading is added for visualization purposes. Green shading represents higher participation values. (d) The City began installing AMI meters in late 2016 and were fully installed by 2021. One meter is assumed per account. The City offers leak detection and notification to its customers on AMI meters.
As such, the data in this row reflects the number of AMI meters installed.
EKI C40180.00 4-9
EKI Environment Water, Inc.
December 2025
Power BI Desktop
D. Participants by Year and Program Category
0 1000
2000
Year
Participants
1995 2000 2005 2010 2015 2020 2025
Program Category
Audits & Reports
Clothes Washers
Cooling & Heating Systems
Greywater
HET
Irrigation Systems & Devices
Other
Pools & Fountains
Rainwater Harvesting
Urinal
Figure 4-1
Conservation Program Participation
City of Santa Rosa, Sonoma-Marin Saving Water Partnership EKI C40180.00
Abbreviations:
CII = commercial, industrial, institutional
HET = high efficiency toilet
Notes:
(a) See Table 4-3 for program end use, sector, category information and detailed program participation data. (b) Programs are summarized by Residential, CII, Irrigation, or Multiple sector groups based on their targeted sectors. Programs that cannot be exclusively assigned to the Residential, CII, Irrigation sector groups are assigned to the Multiple sector group. (c) Bathroom fixture direct installs are included in the HET program category. (d) Participation in the AMI leaks notification program (i.e., AMI meters installed), outreach, and education programs are excluded from this figure.
A. Participants by Year and End Use
0 1000
2000
3000
Year
Participants
2000 2010 2020
End Use Both Indoor Outdoor
B. Participants by Year and Sector Group
0 1000
2000
Year
Participants
2000 2010 2020
Sector Group (b) Residential CII Multiple
C. Turf Replacement Square Footage
0.0M
0.2M
0.4M
0.6M
Year
Square Footage
2010 2020
EKI Environment & Water, Inc.
December 20254-10
Table 4-4 Estimated Water Savings Achieved by Conservation Programs and Passive Savings City of Santa Rosa, Sonoma-Marin Saving Water Partnership Sector (a) Indoor/
Outdoor
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
AMI Leaks Notification
Program All Both Leaks and Water
Losses 0 0 0 0 0 0 0 6 30 38 44 44 44 44 44 292
HECW Rebate Program MFR, CII Indoor Clothes Washers 8 13 16 19 20 21 22 22 14 10 7 4 2 1 1 179 HECW Rebate Program SFR Indoor Clothes Washers 15 24 32 39 44 46 48 48 49 49 50 50 51 51 37 633 WaterSmart Check-up (Indoor)
Program SFR Indoor Audits & Reports 0 0 0 4 7 8 16 30 26 22 18 12 7 6 6 163 WaterSmart Check-up
(Outdoor) Program SFR Outdoor Audits & Reports 0 0 0 5 12 12 13 12 12 9 8 12 13 13 13 133 WaterSmart Check-up (Indoor)
Program MFR Indoor Audits & Reports 0 0 0 1 1 1 2 3 2 2 1 1 0 0 0 15 WaterSmart Check-up
(Outdoor) Program MFR, CII Outdoor Audits & Reports 0 0 13 175 434 452 458 433 419 326 230 198 165 113 84 3,499 WaterSmart Check-up (Indoor)
Program CII Indoor Audits & Reports 0 0 10 78 151 164 321 592 519 433 335 215 70 43 25 2,956 Irrigation Efficiency Rebate SFR Outdoor Irrigation Systems & Devices 4 5 7 9 10 11 12 12 12 12 9 8 7 5 4 127
Irrigation Efficiency Rebate MFR, CII Outdoor Irrigation Systems & Devices 42 56 71 77 89 102 111 111 111 114 73 63 52 59 48 1,177 Pool Cover Rebate SFR, MFR,
CII Outdoor Pools & Fountains 0 0 0 0 0 0 0 0 0 0 0 0 0.2 0.4 0.4 1 Recirculating Hot Water Pump
Rebate
SFR, MFR,
CII Indoor Cooling & Heating
Systems 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 10
High Efficiency Toilet Rebate SFR, MFR,
CII Indoor HET 3 2 2 2 2 2 1 1 1 1 1 1 1 1 1 21
Efficient Fixture Direct Install
Program SFR, MFR Indoor HET 0 0 0 0 0 0 18 54 53 51 50 49 48 69 92 484 Efficient Fixture Direct Install
Program CII Indoor HET 0 0 0 0 0 0 0 0 0 0 0 0 0 0 13 13 Greywater Rebate SFR, MFR,
CII Both Greywater 0 0.2 0.5 0.5 0.6 0.7 0.7 0.7 0.7 0.7 0.7 0.5 0.3 0.3 0.2 7 Sustained Reduction (c) CII, MFR,
SFR Both Other 52 60 65 66 66 74 75 75 75 117 117 117 117 117 117 1,311 Cumulative
Water
Savings
(AF)
Water Savings Type
End Use Estimated Annual Water Savings (AFY) (b)
Program Category
EKI C40180.00 4-11
EKI Environment Water, Inc.