The WSCP is a standalone document that can be updated independently of the UWMP but is referenced and attached to the 2025 UWMP. The WSCP is summarized in Section 8 and provided in Appendix A.
1.3 UWMP Organization
The 2025 UWMP is organized as follows:
Section 1 – Introduction and Lay Description
This section provides background information on the UWMP process, new regulatory requirements, and an overview of the information covered throughout the remaining sections.
Section 2 – Plan Preparation
This section provides information on the processes used to develop the UWMP, including coordination and outreach efforts, the steps taken to prepare City’s 2025 UWMP, hold a public hearing, adopt, submit, and implement the 2025 UWMP.
Section 3 – System Description
This section describes the City’s water system, service area, population demographics, local climate, and land uses.
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Section 4 – Water Use Characterization
This section describes and quantifies the current and projected water uses through 2050 within the water service area.
Section 5 – SBX7-7 Baselines, Targets, and 2025 Compliance This section describes compliance with the Water Conservation Act of 2009, also known as Senate Bill 7 of Special Extended Session 7 (SBX7-7).
Section 6 – Water Supply Characterization
This section describes and quantifies the current and projected potable and non-potable water supplies.
Section 7 – Water Service Reliability and Drought Risk Assessment This section describes the water service reliability through 2050 and includes the Drought Risk Assessment (DRA) for the next five years.
Section 8 – Water Shortage Contingency Plan
This section includes an overview of the standalone WSCP. The complete WSCP is included as Appendix A.
Section 9 – Demand Management Measures
This section describes City’s efforts to promote conservation and reduce water demand, including discussions of specific demand management measures.
1.4 UWMPs in Relation to Other Efforts
This UWMP characterizes water use, estimates future demands and supply sources, and evaluates supply reliability for normal, single-dry, and five consecutive dry years. The UWMP also requires a standalone WSCP, which is summarized in Section 8.
The City is organized into many departments that provide a variety of services. The Water Division of Public Works led development of this UWMP and coordination efforts with other departments within the City, such as the Community Development Department. As such, the UWMP coordinated with or utilized information from a variety of local or regional sources that are summarized in Section 2.2.
Previous planning efforts that heavily influenced the development of this UWMP include:
Water Resource Management Plan
At the time of development of the 2020 UWMP, a Water Resource Management Plan was prepared to address strategic options for reliable long-term water supply planning (Gannett Fleming for the City of Oxnard, May 2021). The 2025 UWMP considers the Water Resource Management Plan for supply and demand information in conjunction with other resources and information from City staff for consistency across City planning efforts. Considering this information, future expansion of the City’s Advanced Water Purification Facility (AWPF) and 1320
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development of the Aquifer Storage and Recovery (ASR) program are key components to provide a reliable, resilient supply in the future. The expanded AWPF and ASR together will help to offset reduced groundwater allocations, should that occur with the current groundwater adjudication legal process, and is planned to be used for indirect potable reuse.
Climate Action and Adaptation Plan (CAAP)
The CAAP was adopted by the City in December 2022. The CAAP was developed by Environmental Science Associates (ESA), Inc. and the City’s Planning Department to address and align with Senate Bill 32 and other legislative mandates. The CAAP provides a roadmap for how the City will reduce greenhouse gas emissions for the impacts of climate change on public health, infrastructure, ecosystems, equity, and public spaces in the community.
Water Shortage Contingency Plan
The UWMP characterizes water use, estimates future demands and supply sources, and evaluates supply reliability for normal, single-dry, and consecutive dry years. The UWMP Act also requires reevaluation of the City’s WSCP. A summary of the various components of the WSCP is provided in Chapter 8, while the complete, standalone WSCP is available in Appendix A.
1.5 UWMPs and Grant or Loan Eligibility
For a water supplier to be eligible for a grant or loan administered by DWR, the supplier must have a current UWMP on file that meets the requirements set forth by the CWC. A current UWMP must also be maintained by the supplier throughout the term of any grants or loans received. The City has prepared the 2025 UWMP under guidance from DWR’s 2025 UWMP Guidebook (California Department of Water Resources, 2026).
1.6 Demonstration of Consistency with the Delta Plan
The Delta Plan is a comprehensive, long-term, legally enforceable plan guiding how federal, state, and local agencies manage the Sacramento–San Joaquin Delta’s (Delta’s) water and environmental resources. The Delta Plan was adopted in 2013 by the Delta Stewardship Council. Delta Plan Policy WR P1 identifies UWMPs as the tool to demonstrate consistency with state policy to reduce reliance on the Delta for a supplier that carries out or takes part in a covered action. A covered action may include activities such as a multiyear water transfer, conveyance facility, or new diversion that involves transferring water through, exporting water from, or using water in the Delta. As a supplier that receives imported water from the Delta through its wholesale supplier, the City will submit information as outlined in Appendix C of the UWMP Guidebook (State of California Department of Water Resources, 2026).
To document and quantify supplies contributing to reduced reliance on the Delta watershed and improved regional self-reliance, a number of steps must be taken, including:
• Setting a baseline
• Change in delivery of Delta water
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• UWMP WR P1 consistency reporting
DWR does not review this analysis as part of the UWMP approval process; therefore, this information is attached as Appendix B.
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2 Plan Preparation
This plan was prepared using guidance from the DWR 2025 UWMP Guidebook. This chapter provides details regarding the City’s UWMP preparation, and the coordination and outreach efforts conducted.
IN THIS SECTION
• Basis for Preparing a Plan
• Regional Planning
• Coordination and Outreach
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2.1 Basis for Preparing a Plan
As mentioned in Section 1, the CWC requires suppliers with 3,000 or more service connections, or those supplying 3,000 AFY or more to prepare a UWMP. Suppliers are required to update UWMPs at least once every five years on or before July 1, in years ending in six and one, incorporating updated and new information from the five years preceding each update. The City’s 2025 UWMP must be submitted to DWR by July 1, 2026.
The City is preparing an individual UWMP and is not a member of a Regional Alliance. In 2025, the City served approximately 206,822 people in its service area, through 44,621 metered potable connections and supplied approximately 22,977 AFY of potable water to customers.
The City has included all mandatory 2025 data in the development of this UWMP. The City does not sell or purchase water from other suppliers, though it wheels water from Calleguas Municipal Water District (Calleguas) to Port Hueneme Water Agency (PHWA).
Throughout this UWMP, water volume is represented in units of AFY, unless otherwise noted, and data is presented on a calendar year basis.
Table 2-1: DWR 2-1R Public Water Systems
PUBLIC WATER
SYSTEM NUMBER
PUBLIC WATER SYSTEM NAME NUMBER OF
MUNICIPAL
CONNECTIONS 2025
VOLUME OF POTABLE
WATER SUPPLIED
2025, AFY
CA5610007 OXNARD WATER DEPT 44,621 22,977
Table 2-2: DWR 2-2 Plan Identification
TYPE OF PLAN MEMBER OF
RUWMP
MEMBER OF
REGIONAL
ALLIANCE
NAME OF RUWMP OR
REGIONAL ALLIANCE
Individual UWMP No No N/A
Table 2-3: DWR 2-3 Agency Identification
TYPE OF SUPPLIER YEAR TYPE FIRST DAY OF YEAR UNIT TYPE
Retailer Calendar Years 01 01 Acre Feet (AF)
2.2 Coordination and Outreach
The UWMP Act requires a water purveyor to coordinate the preparation of its UWMP with other appropriate agencies in and around its service area. This includes other water suppliers that 1324
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share a common source, water management agencies, and relevant public agencies. The City has prepared this UWMP in coordination with its State Water Project wholesale provider, Calleguas. The City has also reached out to nearby water agencies for input and regional consistency, including United Water Conservation District (United), and the Port Hueneme Water Agency (PHWA).
All relevant entities, including the County of Ventura, were sent 60-day notices of preparation and consideration for adoption at a public hearing prior to the adoption of the 2025 UWMP.
Copies of the letters and other outreach correspondence are provided in Appendix D.
Organizations notified of the City’s effort to update this UWMP are summarized Table 2-5: DWR 2-4 Water Supplier Information Exchange Table 2-5. Public hearing notices are provided in Appendix E.
In 2025, the City received approximately 33% of its supply from imported water from Calleguas and 36% from United. Calleguas is a regional wholesaler that obtains their water from the Metropolitan Water District of Southern California (Metropolitan) and other local sources. United obtains their water from the Oxnard groundwater subbasin. 1325
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Table 2-4. Agency Coordination
AGENCY/ORGANIZATION
PARTICIPATED IN
PLAN
DEVELOPMENT
COMMENTED
ON DRAFT
ATTENDED
PUBLIC
MEETINGS
WAS
CONTACTED
FOR
ASSISTANCE
WAS NOTIFIED OF
PLAN
AVAILABILITY1
WAS SENT A NOTICE
OF INTENTION TO
ADOPT 60 DAYS PRIOR
TO PUBLIC HEARING
WATER SUPPLIERS
Calleguas Municipal Water
District X X
United Water Conservation
District X
Port Hueneme Water
Agency X X
Metropolitan Water District X
PUBLIC AGENCIES
Ventura County Watershed
Protection District X
Ventura Local Agency
Formation Commission X
Ventura County Resource
Management Agency X
City of Camarillo X
City of Ventura X
County of Ventura X
City of Port Hueneme X
OTHER
Naval Base Ventura County X
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AGENCY/ORGANIZATION
PARTICIPATED IN
PLAN
DEVELOPMENT
COMMENTED
ON DRAFT
ATTENDED
PUBLIC
MEETINGS
WAS
CONTACTED
FOR
ASSISTANCE
WAS NOTIFIED OF
PLAN
AVAILABILITY1
WAS SENT A NOTICE
OF INTENTION TO
ADOPT 60 DAYS PRIOR
TO PUBLIC HEARING
Fox Canyon Groundwater
Management Agency X
Channel Islands Beach
Community Services District X
* This table will be updated after public review and adoption. 1327
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As mentioned, the City held several stakeholder outreach meetings to provide opportunities to review development of the UWMP and WSCP.
Important dates for outreach and engagement are listed below:
• Public Draft UWMP released for review – May 2026
• Published Public Hearing Notices - Vida Newspaper published on May 28, 2026, and June 4, 2026
• City Public Works and Transportation Committee reviews– May 26, 2026 • Council Meeting conducts Public Hearing and adopts Final UWMP and WSCP – Jun 16, 2026
Table 2-5: DWR 2-4 Water Supplier Information Exchange
2.3 Completed Steps for UWMP and WSCP
The City adopted the 2025 UWMP with the WSCP. Both were made available for public review in May/June 2026 and a public hearing was held on June 16, 2026 to receive public input on the draft documents. The public hearing notices are attached as Appendix E.
The City Council adopted the 2025 UWMP and the WSCP at a public meeting on June 16, 2026. The resolution of adoption is included in Appendix F.
This WSCP was submitted to DWR through the WUEData portal before the deadline of July 1, 2026. This WSCP will be available to the public on the City website.
If the City identifies the need to amend this UWMP or WSCP, it will follow the same procedures used previously for notification to cities, counties, and the public and for initial adoption.
WHOLESALE WATER SUPPLIER NAME
Calleguas Municipal Water District
United Water Conservation District
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3 System Description
This section describes the City’s water system, service area, population demographics, local climate, and land uses.
IN THIS SECTION
• General Description
• Service Area Boundary Map
• Service Area Climate,
Demographics, and
Socioeconomics
• Land Uses
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3.1 General Description
The Public Works Department manages the potable water, recycled water and wastewater systems for the City. The water system includes a mix of residential, commercial and industrial customers. The surrounding area, the Oxnard Plain, is distinctive for its year-round agricultural production.
3.2 Service Area Boundary Maps
Figure 3-1 shows the City service area boundary map and surrounding area. The service area has changed slightly since the 2020 UWMP.
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Figure 3-1. City of Oxnard Service Area
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3.3 Service Area Climate
Oxnard’s climate is characterized as a dry, sub-tropical climate, mainly due to its proximity to the Pacific Ocean. Table 3-2 presents average climate data for the service area, including temperature, precipitation, and reference evapotranspiration (ETo). As shown in Table 3-2, the warmest month of the year is August with an average temperature of 66.6 degrees Fahrenheit (°F), while the coldest month of the year is December with an average temperature of 54.3°F.
The annual average precipitation within Oxnard’s service area is about 10 inches. As shown in Table 3-2, the majority of rainfall occurs in November through March. December is typically the wettest month with an average rainfall of approximately 2.3 inches.
Table 3-1. Average Monthly Climate Data, 2010-2024
MONTH
AVERAGE PRECIPITATION
(INCHES)
AVERAGE ETO
(INCHES)
AVERAGE
AIR
TEMPERATUR
E (ºF)
January 1.6 2.5 55.8
February 1.2 2.9 54.5
March 1.9 3.9 55.8
April 0.59 4.8 58.0
May 0.21 5.3 59.5
June 0.14 5.4 62.9
July 0.26 6.1 66.2
August 0.49 5.7 66.6
September 0.28 4.5 65.7
October 0.48 3.7 63.3
November 0.85 2.8 58.2
December 2.3 2.2 54.3
ANNUAL AVERAGE
TOTAL:
10.3 49.7
60.1 1CIMIS weather station 152 in Camarillo; https://cimis.water.ca.gov/. 1332
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3.4 Service Area Population, Demographics, and
Socioeconomics
3.4.1 Population and Housing
The City’s water service area boundary differs from the City limits boundary. Projections of the population within the City’s water service area are based on estimates from the 2020 U.S.
Census Bureau and the Southern California Association of Governments (SCAG). A geographic information systems (GIS) analysis of 2020 Census data was used to determine the City’s 2020 service area population and derive a 2020 persons per connection factor (4.72). This factor was then multiplied by the number of connections in 2021-2025 to estimate the water service area population. To project the population served by the City from 2030 to 2050, average annual population growth rates from SCAG projections were applied to the 2025 estimate. SCAG projected a slight increase in population from 2019 to 2035 (averaging 0.64% per year) and a slight increase in population from 2035 to 2050 (averaging 0.12% per year).
SCAG also estimated future households considering the Regional Housing Needs Assessment (RHNA). RHNA establishes housing needs for each jurisdiction over the applicable planning period. SCAG adopted the 6th Cycle RHNA Allocation Plan, which covers the planning period from October 2021 through October 2029 (Southern California Association of Governments (SCAG), March 2021). SCAG’s population and household projections inform the RHNA Allocation Plan and are used in the determination and allocation of housing needs, including lower income housing, for individual jurisdictions. The growth projections in this UWMP are based on SCAG projections for the service area and therefore also incorporate the lower income housing projections.
The City’s Water Department coordinated with the City’s Community Development Department to ensure the population projections provided in this UWMP align with SCAG and other City planning efforts. SCAG describes a recent increase in accessory dwelling units (ADUs). As reported in the City's General Plan Annual Report (City of Oxnard, 2025) in 2025, 244 ADUs were issued a building permit, and 174 were constructed and occupied. The City's Housing Element projects the development of 283 ADUs during the 2021 - 2029 cycle. To date, over 800 permits have been issued for the construction of ADUs and 469 ADUs have been constructed.
Therefore, the City has met its Housing Element projections and will significantly exceed that projection.
Estimated current and projected future population and households for the City’s service area are included in Table 3-2.
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Table 3-2: Historical, Current, and Projected Population
YEAR TOTAL CITY
POPULATION1
POPULATION SERVED
BY THE CITY
SCAG HOUSEHOLDS
ESTIMATE
2015 205,512 198,207 -
2020 202,063 198,563 54,471
2021 203,405 198,945 55,544
2022 204,746 199,426 56,616
2023 206,088 197,464 57,689
2024 207,430 197,879 58,761
2025 208,771 206,822 59,834
2030 215,479 213,585 65,196
2035 222,188 220,348 70,559
2040 223,556 221,728 70,592
2045 224,925 223,108 70,626
2050 226,294 224,488 70,660
1 Total City population was estimated by applying the SCAG population growth rate (described in text above) (Southern California Association of Governments (SCAG), March 2021) to the 2020 US Census population estimate for the City (US Census Bureau, 2024).
3.4.2 Other Social, Economic, and Demographic Factors
According to the US Census Bureau, the estimated median income of City residents in 2024 was $96,212 (in 2024 dollars) (US Census Bureau). The estimated poverty rate was 11.0%. An estimated 68.9% of persons aged 25 or higher hold a high school degree or higher (US Census Bureau). Only 12.2% of the population of the City of Oxnard was estimated to be aged 65 or over according to the US Census Bureau’s 2024 QuickFacts (US Census Bureau). The owneroccupied housing rate (2020-2024) was estimated to be 54.4% and the median value of owneroccupied housing units was estimated to be $652,700 (US Census Bureau).
3.5 Land Uses within Service Area
The City serves many different types of users, mainly single-family residences. Other land uses include multi-family residential, commercial, and institutional, industrial, landscape irrigation, and agricultural irrigation. The City’s 2030 General Plan summarizes anticipated land uses. These are shown in Figure 3-2 (City of Oxnard, 2014). As described previously, the City prepared population projections based on 2020 Census and SCAG projections.
SCAG prepares demographic forecasts based on land use data through an extensive process that emphasizes input from local planners in coordination with local or regional land use authorities, including the City, incorporating essential information to reflect anticipated future populations and land uses. SCAG’s projections undergo extensive local review, incorporate zoning information from city and county general plans, and are supported by Environmental Impact Reports. In advance of publication of SCAG’s latest estimates (as part of SoCal Connect 1334
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2024), SCAG met with each jurisdiction individually, including the City, to review the demographic forecasts. This review process incorporated feedback from the City Community Development Department, to help align the demographic forecasts with current land use and anticipated land use changes.
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Figure 3-2. City of Oxnard General Plan Designation Areas 1336
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4 Water Use Characterization
This section describes and quantifies the City’s past, current, and future water use through 2050. The City provides potable and recycled water to nearly 43,000 service connections. In 2025, the City delivered approximately 21,000 AFY of
potable water to its customers (excluding water losses). In the past five years, the City has delivered as much as 25,000 AFY to its customers in any single calendar year (excluding water losses).
IN THIS SECTION
• Non-Potable Versus Potable
Water Use
• Worksheets and Reporting
Tables
• Water Use for Lower Income
Households
• Climate Change Considerations
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4.1 Past, Current, and Projected Water Use by Sector
4.1.1 Water Use Sectors Listed in Water Code
Water suppliers are required to identify water uses for each of the applicable water use sectors identified in CWC 10631(d). The City primarily serves potable water to customers, though it does supply a small amount of recycled water. Recycled water uses are described in Section
6.2.7. The City serves the following water uses:
Single Family Residential
Single family residential customers are typically on a lot with a free-standing building containing one dwelling unit that may include a detached secondary dwelling.
Multi-Family Residential
Multi-family residential customers are typically multiple dwelling units within one building or several buildings within one complex.
Commercial/Institutional
The City tracks commercial and institutional customer water uses as one. Commercial customers typically provide or distribute a product or service and institutional water customers are typically public services, such as higher-education institutions, schools, courts, churches, hospitals, government facilities, and nonprofit research institutions.
Landscape Irrigation
The City tracks the water use for landscape irrigation.
Industrial
The City tracks the water used by industrial customers.
Agricultural Irrigation
This consists of irrigation used for agriculture.
Other – Fire Hydrants
This consists of metered water from fire hydrants.
Sales/Transfers/Exchanges to Other Agencies
The City transfers State Water Project (SWP) water from Calleguas to PHWA.
Losses
Distribution system water losses are the water losses from the point of water entry to the distribution system to the delivery point to the customer’s system. Water losses are discussed in Section 4.1.3.
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4.1.2 Past and Current Water Use
The average annual potable water consumption by the City’s customers over the last five years is approximately 23,000 AFY. Approximately 37% of Oxnard’s total potable deliveries were to single family residences, followed by 21% to commercial and institutional customers and 15% to multi-family residences from 2021 to 2025. These percentages do not consider potable water transferred by the City from Calleguas to PHWA. Figure 4-1 and Table 4-1 summarize historical water consumption by customer class. Over the last five years, the City has provided an average of approximately 400 AF to PHWA annually.
Figure 4-1. Historic Water Consumption
25,140
23,691
22,208
22,873
21,232
-
5,000
10,000
15,000
20,000
25,000
30,000
2021 2022 2023 2024 2025
Consumption, AF
Agricultural Commercial/Institutional Industrial Landscape Irrigation Multi-Family Residential Other-Fire Hydrant Single Family Residential Wheeled to PHWA 1339
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Table 4-1. DWR 4-1R Actual Demands for Water, 2025, AFY
USE TYPE
ADDITIONAL
DESCRIPTION
LEVEL OF
TREATMENT
WHEN DELIVERED
2025
VOLUME, AFY
Single Family Potable 9,315
Multi-Family Potable 3,080
Commercial Potable 3,554
Industrial Potable 1,826
Landscape Potable 2,684
Other Fire Hydrant Potable 0
Agricultural irrigation Potable 635
Losses Potable 1,745
Sales/Transfers/Exchanges to
Other Agencies Wheeled to PHWA Potable 138
TOTAL: 22,977
4.1.3 Distribution System Water Losses
Distribution system water losses are the physical potable water losses from the point of water entry to the distribution system to the point of delivery to the customer’s system. Water loss can result from aging infrastructure, leaks, seepage, theft, metering inaccuracies, data handling errors, and other causes. Addressing water losses can increase water supplies and recover revenue. The City monitors its water loss and prepares an annual AWWA Water Audit to estimate the volume of water loss. The City has submitted all required water loss audits to the State, as shown in Table 4-2
Table 4-2: DWR 4-5R Month Water Loss Audit Reporting
Public Water System ID # Reporting Period Submitted to DWR CA5610007 2020 Yes
2021 Yes
2022 Yes
2023 Yes
2024 Yes
DWR NOTES:
2020 AWWA: View Spreadsheet
2021 AWWA: View Spreadsheet
2022 AWWA: View Spreadsheet
2023 AWWA: View Spreadsheet
2024 AWWA: View Spreadsheet
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CWC Section 10608.34 required the SWRCB to develop water loss performance standards for urban retail water suppliers to minimize water waste through system leaks. Water loss performance standards were developed through a rulemaking that became effective in 2023.
Under the regulations, each supplier will be required to comply, by 2028, with an individualized volumetric water loss standard based on real loss, using the economic model developed by the SWRCB and the supplier’s own unique data. Real loss is the physical loss of water from water distribution systems, as opposed to apparent losses, which are revenue losses due to meter inaccuracies, billing errors or unauthorized consumption. A supplier’s baseline water loss is calculated as the average water loss from at least 3 of the 4 water loss audits from 2017 – 2020.
The real water loss performance standard is based on gallons per service connection per day (gpscd), or gallons per mile of pipe per day (gpmd), depending on how the supplier reports real loss. Post-2028 compliance with volumetric water loss standards will be assessed every three years based on the average of the supplier’s real loss from the preceding three years, with an allowed variation of 5 gallons per connection per day above the supplier’s water loss standard.
Apparent loss standards are equal to the baseline apparent loss and compliance is evaluated at the same time as compliance with the Real Water Loss Performance Standard.
Although the compliance period has not yet started, CWC Section 10631 (d)(3)(C) requires water suppliers to provide data in the UWMP to show whether the supplier met its SWRCB water loss performance standard.
Based on data released by the State on January 30, 2026, the City’s baseline real water loss is
26.6 gpscd and the real water loss standard is 18.0 gpscd, and the apparent loss standard is the baseline of 12.1 gpscd. As shown in Table 4-3, based on the most recent water loss audit from 2024, the City has not yet met the real water loss performance standard, but is working toward that goal by 2028 (see Section 9.2.5). Section 9 discusses the City’s programs to assess and manage distribution system real loss.
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Table 4-3: DWR 4-6R Progress Towards 2028 Water Loss Standard Public
System ID #
Reported in
Submittal
Table 2-1R
Did the
Water
Board
Calculate
a Water
Loss
Standard
for this
Public
System?
2028
Real
Water
Loss
Standard
per Unit
per day
Units for
Real Water
Loss
Standard
Number
of Units
Volume
of Total
Real
Water
Loss
(from
AWWA
Water
Loss
Audit)
2025 or
Most
Recent
Year Real
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)
2025 or
Most
Recent
Year
Apparent
Water
Loss per
Unit per
Day
CA5610007 Yes 18.0 gpscd 44,621 1,004 20.1 12.1 gpscd 44,621 528 10.6 1342
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4.1.4 Projected Water Use
The “Making Conservation a California Way of Life” Regulation (CWOL Regulation) establishes unique water budget-based Urban Water Use Objectives (UWUO) for each urban retail water supplier in the State. The CWOL Regulation requires suppliers to calculate an annual UWUO consisting of these core components:
UWUO = Residential Indoor Water Use Budget + Residential Outdoor Water Use Budget + Commercial, Industrial, and Institutional (CII) Dedicated Irrigation Meters (DIM) Outdoor Water Use Budget + Real Water Loss Budget
Each component has associated water efficiency standards that become increasingly stringent through 2040 as shown in Table 4-4. The key standards are residential indoor GPCD, Landscape Efficiency Factors (LEF), and real water loss measured in gpscd. Annually updated supplier-specific input data is also required for population, climate, landscapes, and real water losses. The UWUO does not include some uses, such as CII indoor use or other uses that are considered “Excluded Demands”.
Table 4-4. Water Efficiency Standard by Reporting Period Year
Residential Indoor
GPCD
Residential
Outdoor LEF CII DIMs Real Water Loss Budget1
FY
23/24 55 0.8 Actual Reported “Landscape” Volume
Actual Reported or
Budget
FY
25/26 47 0.8 Actual Reported
“Landscape” Volume
Actual Reported or
Budget
FY
30/31 42 0.8 0.8 LEF (starts July 1, 2028)
Budget (starts July
1, 2027)
FY
35/36 42 0.63 0.63 LEF Budget
FY
40/41 42 0.55 0.45 LEF Budget
1 Budget = Supplier standard for real water loss (gallons per service connection per day) applied to total service connections.
DWR and the SWRCB have developed an annual reporting framework, tools, and guidance for calculating the UWUO and comparing it to the actual use for that year. The SWRCB’s “Water Use Objective Exploration Tool” allows users to enter varying efficiency standards and baseline year(s) of input data to calculate and visualize a comparison of historic demand to the UWUO 1343
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with selected standards. The SWRCB ’s “Annual UWUO and Water Use Report” tool prepopulates input data and standards for the given reporting year. To project demands for this UWMP, a demand tool that aligns with the framework, data, and calculations of the SWRCB’s tools was used and expanded to allow for forecasting future years’ demand considering future efficiency standards, supplier input data, and growth assumptions.
Supplier input data and growth assumptions used in this UWMP for future years are shown in Table 4-5. Projected growth for residential indoor usage is associated with population projections described in Section 3.4. Residential landscape area growth is associated with connections growth scaled with SCAG’s housing projections described in Section 3.4. The historic landscape area provided by the State in its UWUO tools was divided by the 2025 residential service connections to create a landscape area per connection factor that was applied to future connections to account for growth. All non-residential connections were assumed to scale with historic connections growth rates. Excluded Demand growth was assumed to scale with the ratio of historic Excluded Demand to the UWUO applied to future UWUO estimates. The Real water loss standard is applied to the sum of all projected future connections.
Table 4-5. UWUO Components Growth Comparison
UWUO
Component
Supplier
Input Data Input Data for Growth Associated Assumption
Residential
Indoor Population 2025-2050 population See Section 3.4
Residential
Landscape
Landscape
area &
annual
climate data
2025 Irrigable Irrigated
Residential Landscape Area
per Service Connection scaled
to future connections.
SCAG household projections
growth rate applied to
connections. Historic average
climate data from the State is
used for future years.
CII DIM
Landscape Water use
Historic Landscape water use
per service connection scaled
to future connections.
Real Water Loss Connections
Supplier standard for Real
Water Loss (gallons per
service connection per day)
applied to future total
connections.
Sum of future connections
including UWUO & Excluded
Demand categories connections.
Excluded Demand
(not included in
UWUO but
included in total
demand)
Water use
Ratio of historic Excluded
Demand to UWUO applied to
future UWUO estimates.
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Future efficiency standards (see Table 4-4) were applied to existing customer residential population, residential landscaped area, CII landscape usage, and total connections. These demand components for existing customers are shown to reduce over time as the standards become more stringent. Excluded demands were assumed to grow at the ratio of historic Excluded Demand to the UWUO. The most stringent standards in Table 4-4 for FY 40/41 were applied to all new growth connections for all time periods, recognizing that new construction will comply with efficient building codes. The resulting projected UWUO, excluded demands, and total demands for both existing and new growth connections are shown in Table 4-6 and Figure 4-2.
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Table 4-6. UWUO Projections by Component, AFY
2030 2035 2040 2045 2050
Existing- Residential Indoor 9,902 9,902 9,929 9,902 9,902 Existing- Residential Outdoor 4,283 3,380 2,956 2,956 2,956 Existing- CII DIM 3,523 2,775 1,982 1,982 1,982
Existing- Real Water Losses 864 864 866 864 864
Existing- Future Total UWUO Demand Target 18,571 16,921 15,733 15,703 15,703 Existing- Excluded Demands 7,793 7,793 7,793 7,793 7,793 Existing- Total Demand 26,365 24,714 23,526 23,497 23,497 New- Residential Indoor 318 636 703 766 1,194
New- Residential Outdoor 389 661 662 664 1,035
New- CII DIM 2 4 6 7 11
New- Real Water Losses 178 181 185 188 294
New- Total UWUO Demand 886 1,481 1,556 1,626 2,535
New- Excluded Demands 203 340 357 373 581
New- Total Demand 1,090 1,821 1,913 1,999 3,116
Existing & New- Total UWUO Demand 19,458 18,402 17,289 17,329 18,238 Existing & New- Excluded Demands 7,997 8,133 8,150 8,166 8,375 Existing & New- Total Demand 27,454 26,535 25,439 25,496 26,613 1346
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Figure 4-2. UWUO Projections by Component, AFY
While the City intends to meet the UWUO, it was also considered that demands may continue in alignment with historic patterns initially and take more time than anticipated to reach direct alignment with the UWUO. Therefore, demands used for the purposes of supply reliability planning are assumed to trend from a historic baseline pattern downward to the UWUO by 2050.
A historic baseline demand per connection per customer type is used to approximate current “normal” demand patterns representative of a range of conditions for influential factors impacting demand, known as “demand drivers”. A key demand driver is rainfall. Ideal baseline years incorporate impacts of dry and wet years since demand typically fluctuates with rainfall due to the need for more irrigation in dry years and less in wet years. For this UWMP, a baseline period of 2021-2024 is used, which captures two wet years and two dry years. Using demands in these years, a baseline water use was established for each connection type, then reduced at a constant rate to meet the UWUO water use for that connection type by 2050.
Figure 4-3 shows the UWUO and the baseline trend to the UWUO projection scenarios and Table 4-7 presents the projected demand by customer type through 2050 for this UWMP. 0 5000
10000
15000
20000
25000
30000
2020 2025 2030 2035 2040 2045 2050
Water Use, AFY
Existing- Residential Indoor Existing- Residential Outdoor Existing- CII DIM Existing- Real Water Losses
Existing- Excluded Demands New- Residential Indoor
New- Residential Outdoor New- CII DIM
New- Real Water Losses New- Excluded Demands
Existing- Future Total UWUO Demand Target
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Figure 4-3. Historic and Projected Demand Scenarios
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Table 4-7. DWR 4-2R Projected Demands for Water
Projected Water Use
Use Type
Additional
Description
Level of
Treatment
When
Delivered
2030 2035 2040 2045 2050
Single Family Potable 8,727 8,158 7,392 6,700 6,075
Multi-Family Potable 3,859 3,607 3,269 2,963 2,686
Commercial Potable 5,372 5,372 5,372 5,372 5,372
Industrial Potable 3,042 3,870 4,897 6,174 7,766
Landscape Potable 2,750 2,476 2,230 2,007 1,807
Other Fire
Hydrants
Potable 82 85 87 90 93
Agricultural
irrigation
Potable 1,107 927 777 655 554
Losses Potable 2,084 2,238 2,244 2,252 2,260
Total 27,024 26,732 26,268 26,212 26,613
The City transfers water from Calleguas to PHWA through the Oxnard-Hueneme (O-H) Pipeline.
This occurs through the Three-Party Agreement, which will expire in 2036, although PHWA demands are anticipated to continue past this date. Projected PHWA demands used in the 2020 UWMP were developed as part of the City’s Water Resources Master Plan, which was being finalized circa the time of the writing of the 2020 UWMP. The projections included in Table 4-8 were developed by reducing the projections from the 2020 UWMP to account for reductions in groundwater pumping and an associated reliance on imported water. 1349
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Table 4-8. Projected Demands for Water, Transferred Water Projected Water Use
Use Type
Additional
Description
Level of
Treatment
When
Delivered
2030 2035 2040 2045 2050
Sales/Transfers/
Exchanges to Other
Suppliers
Transferred
to PHWA
Potable 492 521 563 589 604
Table 4-6, Table 4-7, and Table 4-9 satisfy the requirement to include anticipated water conservation savings when developing future demand projections since they account for water efficiency standards set by the State for the UWUO. Conservation savings were considered and included in developing demand estimates for the next 25 years. However, the City considers projected demand to plan for supply reliability if demands continue in alignment with historic patterns rather than in direct alignment with the UWUO. The City is complying with and planning for UWUO standards as described in Sections 5 and 9.
Senate Bill 1087 requires that water use projections in a UWMP include projected water use associated with single family and multi-family residential housing for lower income households, as identified in the housing elements of any city, county, or city and county within the supplier’s service area. As described in Section 3.4, SCAG’s population and household projections inform the RHNA Allocation Plan and are used in the determination and allocation of housing needs, including lower income housing, for individual jurisdictions. The growth projections in this UWMP are based on SCAG projections for the service area and therefore also incorporate lower income housing projections.
Table 4-9. DWR 4-3R Inclusion in Water Use Projections
Are Future Water Savings Included in Projections? Yes
Are Lower Income Residential Demands Included in Projections? Yes
4.2 Climate Change Considerations
Oxnard is an active participant in the Watersheds Coalition of Ventura County (WCVC) Integrated Regional Water Management Plan (IRWMP) (amended in 2019) and references Appendix K of the WCVC IRWMP. The WCVC IRWMP includes a future climate analysis for Ventura County, completed in 2019, by a partnership between WCVC and the Western Regional Climate Center, Desert Research Institute. The report analyzed 32 Global Climate Models that had been statistically downscaled using the Localized Construction Analogs 1350
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(LOCA) method to examine projected changes in temperature, precipitation, and evapotranspiration for 2021-2040 compared to a baseline period of 1950-2005. The results of the analysis concluded that coastal areas (like Oxnard) will see an average increase in temperature of 2-3°F and a projected 5-10% increase in evapotranspiration. The climate models estimate average annual precipitation to remain relatively the same, but the pattern of rainfall will likely change. The climate analysis estimates that the number of dry days will increase, and precipitation will be reduced by 7% in the winter, 11% in the spring, and 20% in the fall. Since average annual precipitation is not expected to change very much but the number of dry days is expected to increase, precipitation will likely fall in shorter durations but at greater intensities.
This slight shift in precipitation patterns may impact groundwater recharge and how surface water is conveyed, captured, and stored within Ventura County. Additional impacts of climate change will likely extend wildfire season, increase post-fire flash floods and debris flow, increase maximum temperature and overnight minimum temperatures, and increase evaporative demand and affect agricultural production, such as which crops are economical, alter ecosystem functionality, and increase drought susceptibility (N.S. Oakley, B.J. Hatchett, D. McEvoy, and L.
Rodriguez, June 2019).
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5 SB X7-7 Baselines, Targets, and
2025 Compliance
This section describes compliance with the Water Conservation Act of 2009, also known as Senate Bill 7 of Special Extended Session 7 (SBX7-7). The section demonstrates compliance with the 2020 SBX7-7 target and discusses future water use
efficiency requirements.
IN THIS SECTION
• SBX7-7 Forms and Tables
• 2020 Compliance
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5.1 Compliance and Future Water Use Efficiency
Requirements
SBX7-7 was incorporated into the UWMP Act in 2009 and required that all water suppliers increase water use efficiency with the overall goal to decrease per-capita water consumption within the state by 20 percent by the year 2020.
SBX7-7 required DWR to develop certain criteria, methods, and standard reporting forms through a public process that water suppliers could use to establish their baseline water use and determine their water conservation targets. SBX7-7 and DWR's Methodologies for Calculating Baseline and Compliance Urban Per Capita Water Use (State of California Department of Water Resources, 2021) specify methodologies for determining the baseline water demand, 2015 interim urban water use target and the 2020 urban water use target for the City as described in the 2020 UWMP. This section also demonstrates that the City achieved its 2020 water use target.
Table 5-1 below establishes the City’s 2020 actual and 2020 target GPCD. As shown, the City met its 2020 target. Most recently, in 2025, the water use was 97 GPCD, which is well below the 2020 target of 140 GPCD.
Table 5-1. SB X7-7 2020 Target Progress
2020 Target GPCD 2020 Actual GPCD Did Supplier Achieve Target? 140 116 Yes
Figure 5-1 below shows gross water use and daily per capita water use from 2001 to 2025. This includes water received from Calleguas which is ultimately sent to PHWA. 1353
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Figure 5-1. Historic Gross Water Use and Per Capita Water Use New water use efficiency standards from CWOL Regulation supersede SBX7-7 standards. In 2018, two policy bills were enacted by the California Legislature, Assembly Bill 1668 (AB1668, Friedman) and Senate Bill 606 (SB606, Hertzberg), collectively referred to as the “2018 Water Conservation Legislation.” Based on the 2018 Water Conservation Legislation, related legislation, and subsequent adoption of the CWOL Regulation, each urban retail water supplier must comply with its UWUO. DWR and the SWRCB have developed a reporting framework for calculating the UWUO and compliance annually with efficiency standards becoming increasingly stringent through 2040.
The demand projections in this UWMP are based on the City meeting its estimated future UWUO, as described in Section 4.1.4. The City will plan and implement necessary demand management measures (described in Section 9) to support meeting the UWUO. DMMs and UWUO compliance planning enhance resiliency for drought and other water shortage conditions as described in Sections 7, 8, and 9.
129127131
147
131128131132
140
133132131135
124
114113109112
117
112
117
110
98 99 97
0 20
40 60
80 100
120
140
160
0 5,000
10,000
15,000
20,000
25,000
30,000
35,000
2001200220032004200520062007200820092010201120122013201420152016201720182019202020212022202320242025 Daily per Capita Water use (gpcd)
Gross Water Use, AFY
Gross Water Use, AFY Daily per Capita Water Use (gpcd)
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6 Water Supply Characterization
This section describes and quantifies the City’s current and projected potable and non-potable water supplies. It provides a narrative description of each supply source and quantifies the supply availability for each supply source identified. The City’s water supply consists of three sources: imported surface water from Calleguas, local groundwater from United, and local groundwater from City wells.
IN THIS SECTION
• Water Supply Analysis Overview
• Water Supply Characterization
• Energy Intensity
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6.1 Water Supply Analysis Overview
The City obtains water supplies from several sources: City groundwater, United groundwater, and imported Calleguas water. Additionally, Oxnard produces recycled water at its Advanced Water Purification Facility (AWPF). A simple schematic of the various supply sources for the City is shown in Figure 6-1.
The City extracts groundwater from the Oxnard Plain Groundwater Basin (Oxnard Basin) using their own wells and through an agreement with United. United extracts additional groundwater , on behalf of the City, which helps mitigate seawater intrusion. The City then imports water from Calleguas that is blended with the groundwater to conserve costs and to meet the City’s demands. All three of these sources are utilized in normal and dry years.
The City is also working with neighboring agencies and the Fox Canyon Groundwater Management Agency (FCGMA) to ensure the sustainability and reliability of the groundwater basin in the future. Copies of the Groundwater Sustainability Plan (GSP) and a Periodic Evaluation of the GSP are available on the websites shown below:
• GSP: https://fcgma.org/oxnard-subbasin-gsp-files/ (Dudek, December 2019) • Revised First Periodic Evaluation Groundwater Sustainability Plan for the Oxnard Subbasin (Dudek, January 2025): https://fcgma.org/gsp-periodic-evaluations/ The volume of water utilized from each source in 2025 is summarized in Table 6-1. 1356
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Figure 6-1. Supply Schematic
Table 6-1: DWR 6-8R Actual Water Supplies
2025
WATER SUPPLY
ADDITIONAL DETAIL ON
WATER SUPPLY
ACTUAL VOLUME,
AFY WATER QUALITY
Groundwater (not
desalinated) City 7,077 Drinking Water
Groundwater (not
desalinated) United 8,278 Drinking Water
Purchased or Imported
Water Calleguas 7,485 Drinking Water
Purchased or Imported
Water Wheeled to PHWA 138 Drinking Water
TOTAL: 22,977
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6.2 Water Supply Characterization
This section provides further guidance on the water supply availability and narrative required under the Water Code.
6.2.1 Purchased or Imported Water
The City has imported an average of 8,065 AFY from Calleguas in the last five years. The City purchases imported water from Calleguas, a regional wholesale agency. Calleguas obtains State Water Project (SWP) water from Metropolitan. The City tries to minimize the amount of imported water from Calleguas to minimize costs and water rates. Until recently, Calleguas employed a tiered water rate structure, and the City operated to remain below the Tier 1 threshold to conserve costs. Since the 2020 UWMP, Calleguas has effectively eliminated their tiered rate structure. The City continues to try to minimize use of this supply source. Water from Calleguas is blended with other sources by the City to help improve water quality. For this reason and to meet hydraulic objectives, there is a minimum amount of water that the City uses and plans to use from Calleguas.
Historically, SWP supplies met Calleguas’ imported water needs, but drought and low snowpack have reduced allocations. In 2022, consecutive 5% allocations led Metropolitan to implement emergency conservation measures, limiting outdoor watering in Calleguas’ service area until early 2023 when rainfall improved conditions. SWP reliability is expected to decline and become more variable due to climate change (Water Systems Consulting, Inc., 2026). In 2022, the City’s monthly allocation from Calleguas was 1,304.9 AF, or 15,660 AFY. For reference, the City used 8,479 AFY of Calleguas supply in 2022.
Metropolitan’s 2025 UWMP water reliability assessment anticipates reliable supplies in all year types. However, for more conservative planning, Calleguas’ water reliability assessment incorporates the rapid onset of climate change impacts that are expected to increase the variability of future SWP supply, including increased frequency and duration of drought periods (Water Systems Consulting, Inc., 2026).
In years one through four of a five-year drought, Calleguas projects sufficient supplies to meet demand. In the fifth consecutive drought year, Calleguas supplies are projected to be insufficient to meet the projected unconstrained demand. Therefore, Calleguas assumes a 15% reduction to match supply availability (Water Systems Consulting, Inc., 2026).
As a result, the City is focused on additional supply sources and anticipates that in a water shortage emergency, it is possible that Calleguas would supply water to customers 100% reliant on them prior to serving water to the City. Calleguas’ planned options to address emergency allocations are described in Calleguas’ 2025 UWMP (Water Systems Consulting, Inc., May 2026) and 2025 WSCP (Water Systems Consulting, Inc., May 2026) as described in more detail in Section 7.2. Calleguas is subject to Metropolitan’s supply reliability as discussed in the next section. Calleguas is also working to improve reliability of its supplies and system resilience, including its Water Supply Alternatives Study and Water Resources Implementation Strategy 1358
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that recommended multiple new local supply projects. Oxnard participated in both regional studies and is implementing multiple projects to increase its groundwater supply, as described in the remainder of this chapter, that were included in these planning studies.
6.2.1.1 Metropolitan Water District of Southern California Metropolitan faces several challenges in providing adequate, reliable, and high-quality supplemental water supplies for southern California, including dry hydrologic conditions and Sacramento-San Joaquin River Delta issues. Metropolitan’s 2025 UWMP indicates that supply reliability is increasingly challenged by growing dependence on climate‑stressed imported supplies (Colorado River and SWP), compounded by hydrologic variability, regulatory and infrastructure risks, and the need to actively manage shortages under prolonged drought conditions. As described in Metropolitan’s draft 2025 UWMP, it is investing in multiple projects and programs to mitigate against these vulnerabilities (Metropolitan Water District of Southern California, 2025). This includes recent investments in the planning and design of the Delta Conveyance Project to mitigate risks in the Sacramento-San Joaquin Delta, investments in drought action projects to improve system constraints, and core supply and storage projects to improve reliability.
6.2.2 Groundwater
The City extracts groundwater from the Oxnard Basin during normal and dry years and currently has access to groundwater supplies through both City production wells and groundwater produced by United on the City’s behalf. Over the last five years, City pumping and groundwater from United from the basin averaged approximately 7,500 AFY and 8,200 AFY, respectively, totaling 15,700 AFY. The City has a current total groundwater allocation of 17,464 AFY.
Groundwater remains an important component of the City’s supply portfolio; however, future groundwater availability is subject to basin management requirements, regulatory actions, legal determinations, operational constraints, and water quality considerations.
The FCGMA, acting as the basin management agency under the Sustainable Groundwater Management Act (SGMA) and related authorities, has adopted basin management measures intended to achieve long-term sustainability and address seawater intrusion risk. Details regarding FCGMA and basin management are provided in Section 6.2.3. The groundwater allocation to the City via governances from the FCGMA may change and/or be impacted by active groundwater adjudication or requirements pursuant to SGMA. As such, the volume of groundwater availability may change but specific estimates of future allocation for Oxnard are unknown at the time this UWMP was prepared.
The GSP and subsequent First Periodic Evaluation of the GSP evaluated multiple future groundwater pumping and sustainable yield scenarios using updated groundwater flow modeling. The evaluation does not assign City-specific groundwater production estimates or allocations. Future groundwater availability for the City remains uncertain and is subject to basin-wide management actions and future FCGMA regulatory decisions. Therefore, for 1359
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planning purposes, it is assumed that the City’s groundwater allocation will change at a rate commensurate with basin-wide historic baseline pumping and sustainable yield scenario estimates.
The GSP identifies approximately 69,000 AFY of groundwater pumping during the 2015–2017 baseline period and describes that continuation of this pumping level would result in ongoing seawater intrusion, indicating that the baseline condition is unsustainable. The First Periodic Evaluation refines the GSP’s long-term sustainable yield estimates under four future condition groundwater flow modeling scenarios, including “Projects”, “Basin Optimization”, “Future Baseline with EBB” (United’s Extraction Barrier and Brackish (EBB) Water Treatment project), and “Future Projects with EBB”, with a wide range of estimated sustainable yields. Oxnard Basin potential sustainable yield scenarios and estimated percentage reductions from a 2015- 2017 baseline are shown in Table 6-2.
Table 6-2. Oxnard Subbasin GSP & First Periodic Evaluation Sustainable Yield Scenarios 2019 GSP First Periodic GSP Evaluation
Historic pumping
(2015–2017 avg)
Sustainable
Yield
No New
Projects
Basin
Optimization Projects EBB*
69,000 39,000 44,700 52,300 49,400 68,200
Reduction from
2015-2017 -43% -35% -24% -28% -1%
* United’s Extraction Barrier and Brackish (EBB) Water Treatment project The “Projects” scenario in Table 6-2 incorporates plans for projects to improve and expand the City’s AWPF, so it was chosen to represent the future scenario aligned closest with the City’s supply planning assumptions described in this UWMP. For planning purposes, it is assumed that the City’s groundwater availability under the “Projects” scenario’s sustainable yield will result in an approximate 28% reduction from baseline conditions to 9,540 AFY by 2040. This approach is consistent with the GSP’s basin-wide framework and the absence of assigned agency-specific sustainable yield allocations. However, it is important to note that there are a wide range of potential future scenarios in which the city may be subject to higher or lower allocation reductions. For UWMP planning purposes, the 28% reduction assumption strikes a balance between worst- and best-case scenarios.
Because the magnitude, timing, and implementation of future allocation reductions may be affected by future FCGMA actions, basin conditions, administrative decisions, and ongoing legal or regulatory proceedings, the groundwater reduction assumptions used in this UWMP should be understood as planning assumptions rather than fixed entitlements or guaranteed future pumping levels. For the same reason, this UWMP does not assume that any additional droughtyear reduction would automatically apply on top of long-term basin reductions unless and until such reductions are formally established. Likewise, use of groundwater storage allocations, 1360
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carryover amounts, or similar credits is assumed only to the extent authorized under thencurrent FCGMA rules, resolutions, orders, or other applicable actions in effect at the time of use.
Where future access to such amounts depends on agency approval or changing basin conditions, that access remains uncertain for planning purposes.
Groundwater supply reliability is also influenced by water quality and operational factors. The City currently operates a desalter and blends local groundwater with imported water to manage total dissolved solids (TDS) and ensures drinking water quality objectives. Future groundwater quality may be affected by salinity, basin conditions, regulatory requirements, treatment performance, and related operational considerations. In addition, certain groundwater management requirements and related matters are currently subject to dispute and litigation, the outcome of which is uncertain. Accordingly, the City will continue to monitor basin management developments, water quality conditions, and legal and regulatory actions and will adapt operations and future planning assumptions as needed.
6.2.2.1 United Groundwater
As mentioned in the previous section, approximately 8,200 AFY has been extracted from the basin on average in the last five years by United on behalf of the City and delivered through the O-H pipeline. This agreement helps the City and other coastal agencies mitigate seawater intrusion. Rather than pump near the coast, the City obtains water from the O-H pipeline that conveys groundwater extracted from wells further inland. The O-H Pipeline Agreement between United and the City provides the City with 50.47% of the total pipeline capacity (26.75 cfs) (AECOM for the City of Oxnard, 2015).
The groundwater extracted by United and delivered to the City via the O-H Pipeline is also subject to FCGMA and uncertainty about future groundwater supply conditions and sustainable yield as described above for City groundwater. This source also requires blending for desired levels of TDS. It is important to note that United’s Draft 2025 UWMP assumes “United’s future supply estimates for the Oxnard-Hueneme (OH) System are based on the scenarios that include EBB, which will not require allocation reductions” (United Water Conservation District, April 2026). While the City recognizes that this could be a potential future groundwater condition, the City’s UWMP as described in the previous section, assumes a more conservative supply planning approach for reliability, resiliency, and cost efficiency planning purposes.
6.2.2.2 Basin Description
The Oxnard Basin underlies the City of Oxnard and the Point Mugu Naval Air Station in southern Ventura County. The Oxnard Basin is bounded by the Mound and Santa Paula subbasins and the Oak Ridge fault line to the north, the Las Posas Valley Basin to the north east, the Pleasant Valley Basin to the east and the Pacific Ocean to the west. The basin is of alluvium with semi-permeable rocks from the Santa Monica Mountains (California Department of Water Resources). The extent of the Oxnard Basin and surrounding local basins is shown in Figure 6-2. The Oxnard Basin is an alluvial basin containing a collection of interconnected aquifers separated by layers of clay strata. The Oxnard Plain Groundwater Basin can be 1361
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generally categorized into three parts: the Oxnard Forebay, the Upper Aquifer System and the Lower Aquifer System. Figure 6-3 provides a schematic profile view of the Oxnard Basin.
The Oxnard Forebay is the unconfined portion of the Oxnard Basin and is generally located along the Santa Clarita River northeast of where Oxnard Boulevard intersects with U.S.
Highway 101 in the City of Oxnard. The Oxnard Forebay is the primary means by which the Oxnard Basin is recharged. The Oxnard Forebay is recharged by infiltration from the riverbed of the Santa Clarita River and spreading basins constructed for that purpose. From the Oxnard Forebay, located in the upper most portion of the Oxnard Basin, groundwater is able to seep into the Upper and Lower Aquifer Systems because the clay layers which separate the aquifers are not continuous at this location.
The Upper Aquifer System (UAS) comprises of the upper 500 feet of the confined portions of the Oxnard Basin which includes a semi-perched zone and the Oxnard and Mugu aquifers. The Upper Aquifer system is hydraulically connected to the Pacific Ocean through the Oxnard and Mugu aquifers and is how seawater intrusion enters the Oxnard Basin in periods of overdraft.
The Lower Aquifer System (LAS) includes the deeper confined aquifers including the Hueneme, Fox Canyon, and Grimes Canyon aquifers. The Lower Aquifer System is separated by an approximately 80-foot-thick layer of silty clay which is continuous except near the Oxnard Forebay.
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Figure 6-2. Local Groundwater Basins
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Figure 6-3. Oxnard Subbasin Profile
Source: (MNS Engineers, Inc. for the City of Oxnard, January 2018)
6.2.3 Groundwater Management
The FCGMA has established a comprehensive groundwater allocation program for the Oxnard and Pleasant Valley Basins, which was initially adopted in 2019 and subsequently amended (2020, 2021, and most recently in 2024) to maintain consistency with legal requirements and to support sustainable groundwater management under SGMA.
The FCGMA has also implemented additional regulatory and management actions in recent years, including the adoption of annual groundwater allocations, basin assessments, and policies to support groundwater sustainability and program funding. In 2023, the Agency adopted provisions related to the accrual, extraction, and transfer of recycled water pumping allocation, which provide additional flexibility for groundwater extraction for the City.
In accordance with SGMA, the FCGMA adopted GSPs for the Oxnard, Pleasant Valley, and Las Posas Valley Basins on December 13, 2019. Since adoption, the FCGMA has continued to implement the GSPs through annual reporting, periodic evaluations, and ongoing refinement of management actions to achieve long-term basin sustainability. The FCGMA Board approved the First Periodic Evaluation of the GSP in December 2024, which was subsequently submitted to DWR in January 2025. Implementation of the GSPs along with associated capital projects and allocation programs is expected to continue to influence groundwater availability within the City’s service area.
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6.2.3.1 FCGMA Ordinances and Resolutions
The FCGMA has established ordinances and resolutions aimed at protecting the groundwater basins which impact groundwater use and pumping and thus, the City. As mentioned previously, the FCGMA adopted a GSP for the Oxnard Basin in December 2019 to comply with the SGMA, signed into law in 2014, and approved the First Periodic Evaluation of the GSP in January 2025.
The GSP and Periodic Evaluation establish groundwater sustainability goals and identify projects and management actions to achieve the goals by 2040.
Key FCGMA ordinances and resolutions which impact groundwater pumping for municipal and industrial water supply are described in Table 6-1. In addition, several resolutions direct groundwater management related to the City’s use of recycled water in lieu of pumping groundwater.
Table 6-3: Key FCGMA Ordinances and Resolutions
ORDINANCE
/RESOLUTION PARTIES KEY FEATURES
Fox Canyon
Groundwater
Management Agency
Ordinance Code
FCGMA and all
GW users within
FCGMA jurisdiction
The ordinance describes FCGMA policy associated with:
Registration of Wells and Levying Charges, Installation and use of Flowmeters for groundwater (GW) Extraction,
Protection of the Los Posas Basin Management Area,
Reduction of GW Extractions, Appeals, Severability and
Penalties. Last Amendment January 9, 2015.
Emergency Ordinance E FCGMA and all
GW users within
FCGMA jurisdiction
Ordinance E temporarily replaced in-use allocation systems (Historical Allocation (HA) and Baseline Allocation (BA)) for municipal and industrial well operators with a Temporary Extraction Allocation (TEA) that uses average annual
extractions from the base period 2003 to 2012. The
ordinance sets a series of allocation reductions from the base amount to take effect beginning July 1, 2014, with a 10% reduction. The ordinance required an additional 5%
reduction every 6 months through January 2016, resulting in a total of 20%.
Ordinance E also required all agricultural well operators to apply for a 25% reduced Efficiency Allocation. An Efficiency Allocation is based on a well operator demonstrating that water used for agriculturally developed land is at least 80% efficient (FCGMA 2011, Resolution No. 2011-04). Ordinance E also contains provisions for the FCGMA Board to undertake additional adjustments to irrigation allowances by resolution.
Emergency Ordinance E is still in effect, but the original allocations were replaced by an Ordinance to Establish a New Pumping Allocation System for the Oxnard and Pleasant Valley Basins, effective October 1, 2020.
Resolution 01-03 FCGMA Establishes formal support to the City GREAT Program that will provide recycled water for injection, direct use, wetland restoration, etc.
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ORDINANCE
/RESOLUTION PARTIES KEY FEATURES
Resolution 03-04 FCGMA and
Oxnard
Grants one-acre foot credit to City for each acre foot of recycled water injected.
Resolution 03-05 FCGMA and
Oxnard
Grants one-acre foot credit to City for each acre foot of recycled water used in lieu of groundwater.
Resolution 13-02 FCGMA and all
Oxnard Recycled
Water users within
FCGMA jurisdiction
Allows the City to accrue a Recycled Water Pumping
Allocation (RWPA) up to 5,200 AFY which allows the City to obtain groundwater in a volume and subject to the conditions of the resolution. Key conditions include:
• City receives one AF of RWPA for each AF decrease
in groundwater pumping by recycled water users.
The City shall pump RWPA from City owned wells
and UWCD’s O-H system.
Groundwater conditions in the Forebay determine when RWPA’s can be pumped.
Resolution 16-06 FCGMA and all
GW users within
FCGMA jurisdiction
Establishes policy for brackish groundwater pumping projects.
Resolution 17-02 FCGMA and all
GW users within
FCGMA jurisdiction
Sets Tiered groundwater extraction surcharge rates:
Tier I – Surcharge rate of $1,461.00 per AF on all GW
extractions that exceed the combined allocation for all water wells within the Agency by 25-AF or less.
Tier II – Surcharge rate of $250.00 per AF on all GW
extractions that exceed the combined allocation for all water wells within the Agency by more than 25-AF but less than 100 AF.
Tier III – Surcharge rate of $500.00 per AF on all GW
extractions that exceed the combined allocation for all water wells within the Agency by 100 AF or more.
This Resolution was replaced by Resolution 20-07.
Resolution 19-03 FCGMA and all
GW users within
FCGMA jurisdiction
Sets groundwater sustainability fee at $11 per AF effective July 1, 2019 and at $14 per AF effective July 1, 2020 to fund the Groundwater Sustainability Program.
Ordinance to Establish a
New Pumping Allocation
System for the Oxnard
and Pleasant Valley
Basins
FCGMA and all
GW users within
Oxnard and
Pleasant Valley
Basins
Adopted October 23, 2019, this ordinance establishes a new pumping allocation system for the Oxnard and Pleasant
Valley Basins, replacing Emergency Ordinance E and Agency Ordinance Code. Effective October 1, 2020, initial extraction allocations were set based on the average annual extractions per well during the 2005 through 2014 base period.
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ORDINANCE
/RESOLUTION PARTIES KEY FEATURES
Resolution 20-05 FCGMA and all
GW users within
FCGMA jurisdiction
Effective January 1, 2021, this resolution established a fee on groundwater extractions to establish a reserve fund. The reserve fund is planned to be used to cover costs associated with implementing FCGMA’s Groundwater Sustainability
Program.
Resolution 20-07 FCGMA and all
GW users within
FCGMA jurisdiction
Effective January 1, 2021, this resolution increased the tiered groundwater extraction surcharge rates. It is anticipated that extraction surcharges will help to discourage the use of groundwater above allocations and assist with ensuring the Oxnard Basin is sustainable.
Resolution 2023-02 FCGMA and all
GW users within
FCGMA jurisdiction
Establishes groundwater pumping allocations and associated requirements to support implementation of the Oxnard
Subbasin Groundwater Sustainability Plan (GSP) and
progress toward achieving groundwater sustainability by 2040. The resolution is a regulatory action intended to manage groundwater extraction, reduce overdraft, and
protect basin conditions consistent with the Sustainable Groundwater Management Act (SGMA).
6.2.3.2 Groundwater Sustainability Plan
The City has long relied on groundwater from the Oxnard Basin, which provides about 50% to 60% of the City’s drinking water. In 1982, in response to the growing threat of seawater intrusion into the coastal groundwater basins, the FCGMA was established by the State Legislature to manage groundwater within the areas or lands overlying the Fox Canyon aquifer for the common benefit of the public and all agricultural, domestic, and municipal and industrial users.
Over the following decades, groundwater pumpers under FCGMA’s jurisdiction continued to work to prevent further seawater intrusion into these shared groundwater basins.
In 2015, in accordance with the SGMA, FCGMA was identified as the Groundwater Sustainability Agency (GSA) for the basins within its boundaries. Also, as required by SGMA, DWR released a list of critically overdrafted basins throughout the state. When a basin is overpumped, there are negative effects, such as groundwater depletion, land subsidence and seawater intrusion. Locally, the Oxnard Basin and the adjacent Pleasant Valley Basin qualified as “critically overdrafted,” having one or more of the negative effects.
To fulfill its GSA responsibilities, FCGMA adopted GSPs for the Oxnard and Pleasant Valley Basins in December 2019 with the goal of bringing the basins into sustainable groundwater management by 2040. Sustainable groundwater management means avoiding undesirable results related to one or more of the six sustainability indicators:
• Chronic lowering of groundwater levels indicating a significant and unreasonable depletion of groundwater supply.
• Significant and unreasonable reduction of groundwater storage. • Significant and unreasonable seawater intrusion.
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• Significant and unreasonable degraded water quality.
• Significant and unreasonable land subsidence.
• Depletions of interconnected surface water that have significant and unreasonable impacts on the beneficial uses of the surface water.
The GSPs set minimum thresholds for each basin to identify when undesirable results are occurring. The minimum thresholds are groundwater levels measured at key wells. Measurable objectives are also identified in the GSPs. The measurable objectives are the ideal average water levels that should be maintained to protect against dropping below the minimum thresholds during periods of drought. Seawater intrusion is the controlling sustainability indicator; that is, if groundwater levels are maintained to control seawater intrusion, then other undesirable results do not occur.
Sustainable yield is the amount of groundwater that can be extracted from the basins annually without causing undesirable results. The combined sustainable yield of the Oxnard and Pleasant Valley Basins was estimated using a numerical groundwater model for the GSPs. For the Oxnard Basin, sustainable yield was estimated for both the Upper and Lower Aquifer Systems. In recognition of the uncertainties associated with the model as well as the need for more data and time to plan for supply projects, the sustainable yield estimate in the GSP was quantified with a range: 32,000 AFY (+/- 6,000 AFY) for the Upper Aquifer System and 7,000 AFY (+/- 3,600 AFY) for the Lower Aquifer System for a total 39,000 AFY (+/- 9,600 AFY) (Fox Canyon Groundwater Management Agency, 2019).
As described previously, the First Periodic Evaluation of the GSP evaluated basin-wide future groundwater pumping scenarios and updated sustainable yield scenarios using updated groundwater modeling. Future groundwater availability for the City remains subject to basin-wide management actions and future FCGMA regulatory decisions. Therefore, for planning purposes, it is assumed that the City’s groundwater allocation will reduce at a rate commensurate with basin-wide historic baseline pumping and the “Projects” scenario’s sustainable yield resulting in an approximate 28% reduction from baseline conditions to 9,540 AFY by 2040. However, under SGMA, GSPs must be evaluated at least every five years and amended or revised as appropriate, including incorporating new data and results of updated numerical model scenarios. Minimum thresholds, measurable objectives, and sustainable yield will be revised in future GSP updates based on feasible projects that are ultimately selected for funding and implementation as well as updated or new information including closing of data gaps and uncertainty. Future UWMPs will incorporate these expected updates accordingly.
6.2.4 Past Five Years
Table 6-4 summarizes total groundwater pumped by the City. This does not include groundwater pumped and purchased from United. All or part of the groundwater described below is desalinated.
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Table 6-4: DWR 6-1R Groundwater Volume Pumped, AFY
GROUNDWATER
TYPE
LOCATION
OR BASIN
NAME 2021 2022 2023 2024 2025
Alluvial Basin Oxnard 6,050 8,899 7,540 7,989 7,077
TOTAL: 6,050 8,899 7,540 7,989 7,077
6.2.5 Surface Water
Oxnard does not currently utilize any surface water sources.
6.2.6 Stormwater
Oxnard does not currently utilize any stormwater sources.
6.2.7 Wastewater and Recycled Water
Currently, the City sells recycled water to local farmers for irrigation use and receives a one for one groundwater pumping allocation for each acre-feet sold the FCGMA Recycled Water Pumping Allocation (RWPA). The City plans to maximize recycled water as a groundwater recharge supply source to ensure future reliability and supply of high-quality water through the Groundwater Recharge Enhancement and Treatment (GREAT) Program (Carollo for the City of Oxnard, 2017). The GREAT program, when originally developed, aimed to increase reliability of water supply, reduce the costs of water supply (imported sources), improve the dependability in accommodating existing needs and meeting planned growth and demands, and enhance stewardship of the local water supply through recycling and reusing a substantial portion of the region’s wastewater. These are still viable objectives for the GREAT program. Additionally, as the groundwater regulatory climate has changed since the original development of the GREAT program, the inclusion of addressing potential groundwater pumping reductions now becomes a key factor that the GREAT program aims to mitigate.
The City constructed an AWPF utilizing microfiltration (MF), reverse osmosis (RO), and an advanced oxidation process (AOP). A summary of these process is provided below:
• Microfiltration (MF): The MF system is used to remove particulate and microbial contaminants and reduces the concentration of bacteria through a low-pressure filtration system which consists of MF feed strainers, MF feed water ORP, pH, turbidity and total chlorine residual analyzers. The current MF system has six treatment trains with additional space to build six more if needed. The MF system can maintain a production flow of 6.25 mgd of Reverse Osmosis permeate even with one train out of service. 1369
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• Reverse Osmosis (RO): The RO system has two parallel skids running with production capacities of 3.125 mgd (additional space is available for 3 RO skids of 6.25 mgd). • Advanced Oxidation Process (AOP): The AOP uses an ultraviolet light and is recognized as the Ultraviolet/Advanced Oxidation and Reduction (UV/AOX) system. The UV/AOX system consists of three Trojan UV Phox D72AL75 reactors to provide an additional barrier and disinfection of the RO permeate. This allows room for expansion for future UV system needs.
The City has outlined future projects to improve and expand the AWPF and create a reliable recycled water supply for indirect potable reuse (IPR). The use of AWPF water as a potable water supply must be demonstrated to water regulatory authorities (California Division of Drinking Water and Los Angeles Regional Water Quality Control Board (RWQCB)) before adding it as a potable source. It is anticipated that the AWPF may provide up to 11,900 AFY of recycled water for IPR. Six aquifer storage recovery (ASR) wells are planned for construction.
6.2.7.1 Recycled Water Coordination
The City of Oxnard is the wastewater provider and has constructed the AWPF to make use of the flow from their wastewater treatment plant for recycled water. The City has coordinated and continues to coordinate with the Pleasant Valley County Water District, PHWA, and United to discuss potential uses of recycled water in their service areas.
6.2.7.2 Wastewater Collection, Treatment, and Disposal
The City of Oxnard collects, treats and disposes of wastewater within its service area. Its service area includes most of the City as well as the City of Port Hueneme, Naval Bases Ventura County, and some unincorporated areas of Ventura County. The wastewater collection system includes 384 miles of gravity sewer pipelines, 4.7 miles of pressurized pipelines and 15 lift stations. Further information on the City’s wastewater collection system can be found in the Public Works Integrated Master Plan (PWIMP) Wastewater Project Memorandum 3.1 Background Summary.
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Table 6-5: DWR 6-2R Wastewater Collected within Service Area in 2025
WASTEWATER COLLECTION RECIPIENT OF COLLECTED WASTEWATER
NAME OF
WASTEWATER
COLLECTION
AGENCY
WASTEWATER
VOLUME
METERED OR
ESTIMATED
WASTEWATER VOLUME
COLLECTED FROM UWMP
SERVICE AREA IN 2025, AFY
WASTEWATER TREATMENT PLANT NAME
WASTEWATER TREATMENT
PLANT LOCATED WITHIN
UWMP AREA
City of
Oxnard Metered 22,805 Oxnard WWTP, Place ID 246946 Yes
TOTAL: 22,805
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Table 6-6: DWR 6-3R Wastewater Treatment and Outcomes within Service Area in 2025, AFY WASTEWATER TREATMENT PLANT NAME GENERATED OUTSIDE SERVICE AREA DOES THIS PLANT TREAT WASTEWATER FROM UWMP SERVICE AREA 2025 VOLUME OF WASTEWATER RECEIVED TOTAL 2025 VOLUME OF WATER TREATED (AF) 2025 END USES OF WASTEWATER IN SERVICE AREA
RECYCLED WATER
SERVICE AREA
WITHIN UWMP
RECYCLED WATER
OUTSIDE OF
UWMP SERVICE
AREA
DISCHARGED
WASTEWATER
INSTREAM FLOW
PERMIT
REQUIREMENTS
DELIVERED TO
WASTEWATER
ANOTHER ENTITY
LEVELSTANDARD OR TREATMENT RECYCLED WATER VOLUME LEVELSTANDARD OR TREATMENT RECYCLED WATER VOLUME LEVELSTANDARD OR TREATMENT RECYCLED WATER VOLUME LEVELSTANDARD OR TREATMENT RECYCLED WATER VOLUME LEVELSTANDARD OR TREATMENT RECYCLED WATER VOLUME NAME OF OTHER ENTITY Oxnard
WWTP,
Place ID
246946
Yes 22,805 25,969 n/a 0
Secondary,
Disinfected
- 2.2
125
Secondary,
Disinfected
- 2.2
22,680 n/a 0 n/a 0 n/a
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6.2.7.3 Recycled Water System Description
The City’s recycled water system consists of the AWPF which is designed to produce advanced treated recycled water with an ultimate design capacity of 12.5 million gallons per day (MGD) but is currently equipped to produce 6.25 MGD. Since operation, the AWPF has produced water for “unrestricted reuse,” also referred to as “disinfected tertiary recycled water” or “Title 22 reclaimed water,” as defined by the SWRCB Division of Drinking Water (DDW), and is to be used for non-potable supply such as landscape irrigation or industrial process water.
Recycled water is pumped from the AWPF into the distribution system by finished water pumps located at the AWPF. The existing recycled water distribution system consists of approximately 10 miles and delivers to the River Ridge Golf course and to various agricultural users. The AWPF facility operates to serve recycled water customers or for IPR. The recycled water distribution system currently does not include any system wide storage tanks; however, some recycled water users maintain their own on-site storage which reduces the peak demand on the AWPF.
For purposes of UWMP reporting, recycled water uses identified in Table 6-7 are limited to direct beneficial uses occurring within the City’s UWMP service area. Recycled water deliveries to users located outside the UWMP service area are described separately in the narrative below and are not characterized as within-service-area uses. This distinction is important because some recycled water customers associated with the GREAT Program are located outside the City’s UWMP service area.
As the City has received the Waste Discharge Requirement/Water Recycling Requirements (WDR/WRRs) to expand use of the advanced treated recycled water for IPR, the construction of the first ASR well project and demonstration required by the permit for IPR is planned to be completed by calendar year 2026 with State permitting to follow the construction phase for approximately 18-24 months. To utilize the recovered water from aquifer storage, this water must meet potable water standards as defined by DDW. The City’s Capital Improvement Program (CIP) includes projects for the future improvements and expansion of the AWPF, addition of ASR well facilities, distribution pipelines, blending, and storage facilities to maximize the recycled water production capabilities as well as to support future demand conditions.
6.2.7.4 Potential, Current, and Projected Recycled Water Uses In January of 2015, the City entered into a Full Advanced Treatment Recycled Water Management and Use Agreement with several entities: Pleasant Valley County Water District, Houweling Nurseries Oxnard, Southland Sod, Reiter Brothers, and Southern Pacific Farming, to provide recycled water for agricultural irrigation. These users are located in the Oxnard Plain, outside the City’s service area. One of the stipulations in the agreement is that these users may receive recycled water at a lower priority than the City’s customers. These agricultural customers grow several crops including sod, strawberries, celery, and other row crops. 1373
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Recycled water use is also planned for general groundwater recharge. The City expects to initially inject approximately 2.9 MGD of recycled water in 2027, and to ultimately increase recycled water injections for recharge up to 6.25 MGD (7,000 AFY). 1374
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Table 6-7: DWR 6-4R Recycled Water Direct Beneficial Uses Within Service Area, AFY Name of Supplier Producing (Treating) the Recycled
Water: City of Oxnard
Name of Supplier Operating the Recycled Water
Distribution System: City of Oxnard
Supplemental Volume of Water Added in 2025:
Source of 2025 Supplemental Water:
USE TYPE
WATER
TYPE
ADDITIONAL
INFORMATION 2025 2030 2035 2040 2045 2050
POTENTIAL RECYCLED
WATER
VOLUME
NARRATIVE
LOCATION
Agricultural Irrigation* 0 0 0 0 0 0 0 N/A
Groundwater recharge
(IPR) ASR Recovered 0 3,000 6,400 6,400 6,400 6,400 10,200 TABLE 6-8 Groundwater recharge
(IPR)
Recycled Water
Pumpback
Allocation
0 200 250 1,250 1,250 1,250 0 N/A
TOTAL: 0 3,200 6,650 7,650 7,650 7,650 10,200 N/A
* The City currently delivers recycled water to agricultural customers outside of the water service area, so 0 AFY is shown for agricultural irrigation. The City intends to increase deliveries of recycled water for which it receives a Recycled Water Pumpback Allocation, which is shown here to reflect that recycled water was delivered but is quantified as potable supply in Table 6-12. 1375
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Table 6-8: DWR 6-5R 2020 Recycled Water Use Projection Compared to 2025 Actual USE TYPE 2020 PROJECTION FOR 2025, AFY 2025 ACTUAL USE, AFY*
Agricultural Irrigation 3,875 0
Landscape Irrigation (excludes golf
courses)
Golf Course Irrigation
Commercial Use
Industrial Use 780 0
Geothermal and Other Energy
Production
Seawater Intrusion Barrier
Recreational Impoundment
Wetlands or Wildlife Habitat
Groundwater Recharge (IPR) 1,345 0
Surface Water Augmentation (IPR)
Direct Potable Reuse
TOTAL: 6,000 0
* The City currently delivers recycled water to agricultural customers outside of the water service area, so 0 AFY is shown for agricultural irrigation; however 125 AFY was delivered to agricultural irrigation customers.
6.2.7.5 Actions to Exchange and Optimize Future Recycled Water Use City Ordinance No. 2728, also called the City of Oxnard Recycled Water Use Ordinance, promotes water conservation and recycled water use to ensure the maximum public benefit from the use of the City’s water supplies. Ordinance No. 2728 established that recycled water shall be used for suitable, non-potable purposes whenever and wherever recycled water is available at a reasonable cost and of an adequate quality. Both existing and new customers may be eligible to use recycled water if it is available in their area (City of Oxnard, n.d.). Due to Waste Discharge Requirement/Water Recycling Requirements (WDR/WRRs), to expand use of the advanced treated recycled water for IPR, corresponding updates to City Ordinance No. 2728 will be needed to reflect this important change.
Also, once implemented, the IPR program will provide another benefit as this source will use the existing potable distribution system, avoiding future construction costs for distribution and longterm maintenance for separate recycled water distribution pipelines. 1376
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Table 6-9: DWR 6-6R Methods to Expand Future Recycled Water
NAME OF
ACTION DESCRIPTION
PLANNED
IMPLEMENTATION
YEAR
EXPECTED INCREASE OF
RECYCLED WATER USE, AFY
Indirect Potable
Reuse
Aquifer Storage Recovery
(ASR) Injection Well #1 2027 3,200
Indirect Potable
Reuse
AWPF
Improvements/Upgrade 2029 TBD
Indirect Potable
Reuse AWPF Expansion 2031 7,000
Indirect Potable
Reuse
AWPF Recycled Water
Storage Construction TBD TBD
Indirect Potable
Reuse ASR Injection Well Field 2031 TBD
- TOTAL: TBD
6.2.8 Desalinated Water Opportunities
The City currently operates Desalter #1 at its Water Campus. Desalter #1 has a capacity of 8,400 AFY with room for future expansion to 16,800 AFY. The Desalter is one of the major components of the City’s GREAT program; other components include recycled water system (wastewater treatment by the AWPF), groundwater injection of recycled water, and brine collection from the AWPF and Desalter for treatment. The Desalter treats groundwater for Total Dissolved Solids (TDS) and nitrate reduction.
Desalter #1 is used to treat local groundwater supplies that require TDS and nitrate reduction before delivery into the potable distribution system. While this provides an important local supply benefit, desalinated groundwater is more costly to produce than groundwater from wells that can be chloraminated and delivered directly into the distribution system. Desalter operation requires treatment, membrane operation, chemical use, energy, brine handling, maintenance, and operator oversight. Desalter production must be balanced against immediate system demand, which limits the ability to operate the facility continuously and to its full annual design capacity.
In addition to brackish groundwater desalination projects, the City has evaluated pursuing seawater desalination projects. Seawater desalination was reviewed as an alternative to future AWPF expansions during the 2012 study for the GREAT program and found to be not cost effective. The City again analyzed seawater desalination in 2015 as a comparative cost to AWPF expansion. The intake infrastructure required to take in seawater into a treatment facility would be both significant and difficult to get permitted, making this alternative even less attractive. However, if in the future the expansion capacity of the AWPF is limited by the secondary effluent available and/or new technologies reduce costs, seawater desalination could be evaluated again as a viable future alternative.
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Table 6-10: DWR 6-8DS Source Water Desalination
- VOLUME OF WATER DESALINATED, AFY
PLANT NAME OR
WELL ID
PLANT CAPACITY,
AFY
INTAKE
TYPE
SOURCE
WATER TYPE
INFLUENT
TDS
BRINE
DISCHARGE 2021 2022 2023 2024 2025
City Desalter 8,400 Vertical
Well
Groundwater Brine Line 3,622 4,135 1,665 1,137 841
- TOTAL: 3,622 4,135 1,665 1,137 841
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6.2.9 Water Exchanges and Transfers
Oxnard, Calleguas and PHWA entered into a Three-Party Agreement in 2002, which provides PHWA with Calleguas water through Oxnard’s Calleguas pipeline.
As part of the development process, when private property is developed that has authorized groundwater allocations, it is transferred to the City as part of the City’s water neutrality program as described in more detail in Section 9.2.7. Historically, the transferred allocations were 2 AFY per acre. This amount was reduced by 25% per Ordinance No. 8 and again by 20% though Emergency Ordinance E in 2014. FCGMA adopted an “Ordinance to Establish a New Pumping Allocation System for the Oxnard and Pleasant Valley Basins”, effective on October 1, 2020, which replaced Emergency Ordinance E. This reset the initial extraction allocations based on the average annual extractions per well during the 2005-2014 base period. As a result, when irrigated acreage changes to Municipal & Industrial (M&I) use through a development process, the extraction allocation used to irrigate the acreage shall be transferred from the agricultural operator to the M&I operator on a one-to-one basis (Ordinance Article 9. Allocation Transfer,
9.4)
In January of 2015, the City entered into a Full Advanced Treatment Recycled Water Management and Use Agreement with several entities: Pleasant Valley County Water District, Houweling Nurseries Oxnard, Southland Sod, Reiter Brothers, and Southern Pacific Farming, to provide recycled water for agricultural irrigation. By the terms of this agreement, agricultural pumpers are required to transfer groundwater allocations to the City on a one-to-one basis for delivered recycled water. FCGMA Resolution 2023-02 allows the City to accrue these “Recycled Water Pumpback Allocations” which can be redeemed by the City when favorable Oxnard Forebay groundwater levels are present.
6.2.9.1 Emergency Interties
Oxnard has interconnections with other water purveyors: one with PHWA, one with the City of Port Hueneme, two with Channel Islands Beach Community Services District, and two with Naval Base Ventura County.
6.2.10 Future Water Projects
The City is working on projects to supplement supply through an ASR project under the GREAT program. The supply obtained from ASR is expected to become operational by 2027. 1379
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Table 6-11: DWR 6-7R Expected Future Water Supply Projects or Programs
NAME OF FUTURE PROJECTS OR
PROGRAMS
JOINT PROJECT
WITH OTHER
SUPPLIERS
AGENCY
NAME DESCRIPTION
PLANNED
IMPLEMENTATION
YEAR
PLANNED
FOR USE
IN YEAR
TYPE
EXPECTED
INCREASE IN
WATER
SUPPLY TO
SUPPLIER,
AFY
IPR No ASR/Injection Well #1 2027 All Year
Types
3,200
IPR No AWPF
Improvements/Upgrades
2029 All Year
Types
TBD
IPR No AWPF Expansion 2031 All Year
Types
7,000
IPR No AWPF Recycled Water
Storage Construction
TBD All Year
Types
TBD
IPR No ASR/Injection Well Field 2031 All Year
Types
TBD
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Table 6-12: DWR 6-9R Projected Water Supplies
PROJECTED WATER SUPPLY, AFY
2030 2035 2040 2045 2050
WATER SUPPLY ADDITIONAL DETAIL ON WATER SUPPLY
REASONABLY
AVAILABLE
VOLUME
REASONABLY
AVAILABLE
VOLUME
REASONABLY
AVAILABLE
VOLUME
REASONABLY
AVAILABLE
VOLUME
REASONABLY
AVAILABLE
VOLUME
Groundwater (not
desalinated) City Groundwater 6,874 5,754 4,635 4,635 4,635 Groundwater (not
desalinated) United Groundwater 7,275 6,090 4,905 4,905 4,905 Purchased or
Imported Water Calleguas 12,666 12,033 11,431 11,431 11,431 Other Calleguas - Transferred to PHWA 492 521 563 589 604 Other IPR 3,000 6,400 6,400 6,400 6,400
Other Recycled Water Pumpback Allocation 200 250 1,250 1,250 1,250 Other Groundwater Allocation Used 0 0 0 0 0
TOTAL: 30,507 31,049 29,184 29,210 29,225
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6.3 Energy Intensity
The City has previously implemented energy efficiency initiatives, including an Energy Action Plan, to support reductions in water system energy use.
In 2025, the City consumed 2,864,350 kWh of electricity and produced 22,977 AF of potable water. This averages to approximately 125 kWh per AF as shown in Table 6-13.
Table 6-13: DWR O-1B: Recommended Energy Intensity Total Utility Approach Water Delivery Product Retail Potable Deliveries
Start Date for Reporting
Period
January 1, 2025
End Date for Reporting
Period
December 31,
2025 URBAN WATER SUPPLIER OPERATIONAL CONTROL
SUM OF ALL WATER
MANAGEMENT
PROCESSES
NON-CONSEQUENTIAL
HYDROPOWER
TOTAL UTILITY HYDROPOWER NET UTILITY
Volume of Water Entering Process
(AF) 22,977 22,977
Energy Consumed (kWh) 2,864,350 2,864,350
Energy Intensity (kWh/AF) 125 125
DATA QUALITY Metered Data
Total consumption of city operations and total potable water delivered is provided for the total utility.
The energy consumed is for electricity use of the water system and includes lights, heating, cooling of any administrative water service facilities, etc.
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7 Water Service Reliability and
Drought Risk Assessment
This section describes water service reliability through 2050. As required by the UWMP Act, the assessment must compare total projected water supply and demands over the next 20 years in five-year increments under normal, single dry water years, and multiple dry water years. This section also includes the drought risk assessment (DRA), which provides a snapshot of the anticipated surplus or deficit if a drought were to occur in the next five years.
IN THIS SECTION
• Water Service Reliability
Assessment
• Drought Risk Assessment
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7.1 Introduction
Water service reliability is determined based on the security of water supply and water infrastructure security. The supply reliability assessment discusses factors (i.e., climatic, environmental, water quality and legal) that could potentially limit the expected quantity of water available from the City’s current and projected sources of supply through 2050. Multiple drought scenarios are considered, and the quantitative impacts of the aforementioned factors on water supply and demand are discussed, as well as possible methods for addressing these issues.
Evaluating water service reliability is critical for water management as it can help identify potential problems before these happen. Water managers can then take proactive steps to mitigate shortages by encouraging water use efficiency, securing new water supplies and/or investing in infrastructure.
7.2 Water Service Reliability Assessment
The City’s 2025 UWMP water service reliability assessment and DRA results indicate that no water shortages are anticipated within the next 25-years under normal, single dry water years, and multiple dry water years.
7.2.1 Service Reliability - Constraints on Water Sources As described in Chapter 6, the City has various water supply sources available (local groundwater, purchased groundwater, imported water, and recycled water) to meet demands during normal, single-dry, and multiple-dry years.
• Groundwater: As described in Section 6.2.2, the local groundwater basin is subject to the jurisdiction of the FCGMA. As the region’s Groundwater Sustainability Agency, FCGMA adopted a GSP for the Oxnard Subbasin in December 2019, in accordance with SGMA. The FCGMA Board approved the Oxnard Basin First Periodic Evaluation of the GSP in December 2024, which was submitted to DWR in January 2025. The groundwater allocation to the City via governances from the FCGMA may change and/or be impacted by active groundwater adjudication or requirements pursuant to SGMA .
The GSP and subsequent updates address the long-term sustainability of the basin for municipal and agricultural pumpers and establish sustainable yield scenarios, which estimate the amount of pumping that will prevent undesirable results to the basin. By 2040, the goal is to bring the basin to a sustainable level and to achieve this, the GSP and First Periodic Evaluation identify multiple sustainable yield scenarios, which could result in a wide range of potential future supply availability for the City. For UWMP planning purposes, it is assumed groundwater availability will decline in proportion to basin-wide sustainable yield under the First Periodic Evaluation “Projects” scenario, resulting in an approximate 28% reduction from baseline conditions to 9,540 AFY by 1384
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2040. While future conditions may result in higher, lower, or no reductions to groundwater supply, the 28% estimate represents a mid-range value within the spectrum of potential sustainable yield scenarios that is aligned with the City’s planned supply.
See Section 6.2.2 for more details.
Another constraint is that high levels of TDS in the local groundwater requires blending with other sources to maintain TDS at desired levels. Additional reliability factors are discussed in Section 7.2.3.
• Purchased Groundwater: As described in Section 6.2.2, the groundwater extracted by United and delivered to the City is also subject to FCGMA and uncertainty about future groundwater supply conditions. This source also requires blending for desired levels of TDS. It is important to note that United’s Draft 2025 UWMP assumes “United’s future supply estimates for the OH System are based on the scenarios that include EBB, which will not require allocation reductions” (United Water Conservation District, April 2026).
While the City recognizes that this could be a potential future groundwater condition, this UWMP assumes a more conservative supply planning approach for reliability, resiliency, and cost efficiency planning purposes.
• Imported Water: Imported surface water from Calleguas is potentially subject to cutbacks for climatic, legal, environmental and water quality reasons. Potential reductions in allocations are discussed in Section 7.2.3. • Recycled Water: The City is expected to establish recycled water as part of their water supply portfolio within the next few years. Since the recycled water source is wastewater flows from indoor use, this supply is generally not impacted by climatic factors. For this reason, limited rainfall does not influence flows of the wastewater system and therefore does not affect the availability of recycled water. Recycled water is commonly viewed as a drought-proof supply and is assumed to be 100 percent reliable.
Factors impacting the reliability of the City’s supply sources are shown in Table 7-1.
Table 7-1: Factors Resulting in Inconsistency of Supply
WATER SUPPLY SOURCE CLIMATIC LEGAL ENVIRONMENTAL WATER
QUALITY
City Produced Groundwater X X X X
United Produced
Groundwater X X X X
Calleguas Imported Water X X X X
Recycled Water X X
While the City has historically received enough supply to meet demand, the supply portfolio is dynamic and historical conditions may not accurately represent scenarios that may happen in 1385
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the future. Therefore, supply and demand were estimated during dry years considering the following priorities and constraints.
1. As described earlier in this section, for UWMP planning purposes, it is assumed groundwater availability for the City and groundwater from United will decline to 9,540 AFY by 2040. While future conditions may result in higher, lower, or no reductions to groundwater supply, this UWMP assumes a more conservative supply planning approach for reliability, resiliency, and cost efficiency planning purposes. See Section
6.2.2 for more details.
2. As described in Section 6.2.2, this UWMP does not assume that any additional droughtyear reduction would automatically apply on top of long-term basin reductions unless and until such reductions are formally established.
3. The City assumes that groundwater storage allocations can be utilized in the future.
4. As described in Section 6.2.1, Calleguas water is used as minimally as possible to avoid high costs, but to meet operational needs and improve water quality blending for TDS targets, there is a minimum amount of water that the City must use from Calleguas.
Imported water reliability in future dry-year conditions may be influenced by Metropolitan’s and Calleguas’ supply conditions, SWP and Colorado River conditions, infrastructure constraints, regulatory actions, water quality needs, and other operational factors. Calleguas’ 2025 UWMP indicates it can provide 100% of demand in normal years, single dry years, and for four consecutive dry years. It will be able to provide 85% of unconstrained demand in a fifth consecutive dry year (Water Systems Consulting, Inc., May 2026).
5. Lastly, it is assumed that recycled water will become a larger part of the City’s portfolio once fully implemented. This will provide flexibility on reducing demand from other sources of water like Calleguas and/or United water. Since recycled water is considered a drought-proof supply, it is not anticipated to be reduced in dry years and is therefore not included in Table 7-2.
Table 7-2: Consecutive Dry Year Percent Reductions by Source.
SUPPLY
CONSECUTIVE
DRY YEAR 1ST
YEAR
REDUCTION
CONSECUTIVE
DRY YEAR 2ND
YEAR
REDUCTION
CONSECUTIVE
DRY YEAR 3RD
YEAR
REDUCTION
CONSECUTIVE
DRY YEAR 4TH
YEAR
REDUCTION
CONSECUTIVE
DRY YEAR 5TH
YEAR
REDUCTION
City
Groundwater 0% 0% 0% 0% 0%
United
Groundwater 0% 0% 0% 0% 0%
Calleguas
Imported 0% 0% 0% 0% 15%
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7.2.1.1 Climatic Factors
Consistent future use of the Oxnard Basin may be affected by climate change. Climate change forecasts indicate a decrease in the number of storms but an increase in their intensity, potentially leading to higher runoff and less recharge of rainfall into groundwater basins.
Additionally, projected rises in sea level may increase the risk and extent of seawater intrusion.
Climate change is considered within the GSP for the Oxnard Basin and in the Calleguas 2025 UWMP, which are both reflected in supply projections in this UWMP.
7.2.1.2 Environmental Factors
As a coastal community, the City and other local agencies continue to monitor the groundwater basin for undesirable results, especially seawater intrusion. This factor is the one most likely to seriously impact the reliability of the City’s current groundwater supply. Environmental factors are considered within the GSP for the Oxnard Basin and in the Calleguas 2025 UWMP, which are both reflected in supply projections in this UWMP.
7.2.1.3 Water Quality Factors
Consistent future use of the Oxnard Basin may be affected by TDS. Currently, the City uses imported water and when necessary, the City desalter to maintain TDS at adequate levels.
Water quality factors are reflected in supply projections in this UWMP.
7.2.1.4 Legal Factors
The City is subject to groundwater regulation by FCGMA. Any limitations to allocations or emergency ordinances implemented by FCGMA will affect the City’s ability to extract groundwater. Calleguas supplies are subject to multiple legal factors. Legal factors are considered within the GSP for the Oxnard Basin and in the Calleguas 2025 UWMP, which are both reflected in supply projections in this UWMP.
7.2.1.5 Response to Factors
In response to the climatic, environmental, water quality, and legal factors mentioned above that could potentially impact the consistency of the City’s supply in the future, the City is advocating continued conservation, active involvement in FCGMA, and completing the process to add recycled water as a supplemental supply.
7.2.2 Service Reliability – Year Type Characterization
In accordance with CWC Section 10635(a), every urban water supplier must provide their expected water service reliability for a normal year, single dry year, and five consecutive dry years for 2030, 2035, 2040, 2045, and optionally 2050.
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7.2.2.1 Types of Years
DWR defines these years as:
• Normal Year: This condition represents a single year or an averaged range of years that most closely represents the average water supply available. An average was used for this analysis.
• Single Dry Year: The single dry year is recommended to be the year that represents the lowest water supply available.
• Five-Consecutive Year Drought: The driest five-year historical sequence for the supplier, which may be the lowest average water supply available for five years in a row.
7.2.2.2 Sources for Water Data
As described in Chapter 6, the City’s water supply portfolio is dynamically managed depending on a variety of factors for each source, including but not limited to groundwater allocations, wholesale allocations, agreements with neighboring agencies, production capacity, and water quality standards. Table 6-12, in the previous chapter, presents the most likely “normal” supply conditions anticipated through 2050. Variables that existed in historical years for each source will likely be different in future normal and drought years and the supply portfolio will be managed to meet demand. While supply constraints vary by source depending on various factors, such as hydrology, rainfall, groundwater conditions, wholesale supply allocation reduction, statewide mandated water conservation, etc., the City can adaptively manage its water supply portfolio to meet demands. Demands tend to fluctuate in response to local rainfall conditions. Therefore, rainfall is used to determine normal and dry year demand scenarios.
Historical rainfall from 2010-2025 was used to determine historical normal and dry years demand conditions that need to be met with a dynamic supply portfolio considering supply constraints at the given time. The normal, single dry, and five-consecutive year drought basis years are shown in Table 7-3. The year with the least rainfall from 2010-2025 was determined to be the single dry year, 2013, and the five-year consecutive drought corresponded to the period of 2013 - 2017. The normal year, 2011, was selected as the year with the second closest to average rainfall from 2010-2025. The year with the closest to average rainfall was 2024; however this was not selected for the purposes of this analysis because it is more appropriate to use years that are closer to each other within a normal period followed by a drought period.
The percent change for each dry year compared to a normal year corresponds to anticipated demand pattern changes during a drought cycle. In the first year, or a single dry year, demands are expected to increase, particularly outdoor demands. It is anticipated that demands will reduce if a drought continues as a result of conservation measures implementation and usage behavior changes due to social awareness of the drought. 1388
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Table 7-3: DWR 7-1R Basis for Water Year Data (Reliability Assessment)
HISTORIC PRODUCTION
YEAR TYPE
BASE
YEAR VOLUME AVAILABLE, AFY PERCENT OF AVERAGE
Average Year 2011 28,189 100
Single-Dry Year 2013 30,454 108
Consecutive Dry Years 1st
Year 2013 30,454 108
Consecutive Dry Years
2nd Year 2014 28,323 100
Consecutive Dry Years 3rd
Year 2015 25,624 91
Consecutive Dry Years 4th
Year 2016 25,638 91
Consecutive Dry Years 5th
Year 2017 26,487 94
The City will meet 100% of demands that are assumed to fluctuate in dry years with adaptive management of its supply portfolio or WSCP actions.
7.2.3 Water Service Reliability – Supply and Demand Comparison Results of the water supply and demand analysis for normal, single dry, and five-year consecutive drought are shown in the following sections. The City expects to meet demands under all water year scenarios and continue to promote conservation to ensure reliability throughout the future.
7.2.3.1 Water Service Reliability – Normal Year
As described previously, the City’s supply portfolio will be managed to meet demand as shown Table 7-4 and Figure 7-1.
Table 7-4: DWR 7-2R Normal Year Potable Supply and Demand Comparison 2030 2035 2040 2045 2050
Supply Totals (from Table 6-
9R), AFY 30,507 31,049 29,184 29,210 29,403
Demand Totals (From Table 4-
2R), AFY 27,516 27,253 26,831 26,801 27,217
DIFFERENCE: 2,991 3,796 2,354 2,409 2,187
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Figure 7-1. Normal Year Potable Supply and Demand Comparison
7.2.3.2 Water Service Reliability – Single-Dry Year
Demand responses during a recent single dry year in 2013 resulted in an 8% increase from an average year demand in 2011. Therefore, the projected single dry year water demands through 2050 are assumed to increase by 8% under similar hydrologic conditions through 2050 as shown in Table 7-5 and are able to be met with the available supply.
Table 7-5. DWR 7-3R Single Dry Year Potable Water Supply and Demand Comparison 2030 2035 2040 2045 2050
Supply Totals, AFY 30,507 31,049 29,184 29,210 29,403
Demand Totals, AFY 29,727 29,442 28,986 28,954 29,403
DIFFERENCE: 780 1,606 198 256 0
Note: Single dry year demands are expected to change based on actual demands in a single dry year in 2013 compared to an average year of 2011 (108%) per Table 7-3.
7.2.3.3 Water Service Reliability – Five Consecutive Dry Years Demand responses during the 2013-2017 drought period were evaluated to inform potential changes in water use under extended dry conditions. During that period, demand initially increased in the first year of drought, followed by reductions in subsequent years as conservation measures and behavioral changes took effect. These historical trends were used as a reference in developing baseline multi-dry year demand projections.
However, under extended dry conditions, the City would implement demand reduction measures in accordance with its Water Shortage Contingency Plan (WSCP) including drought 1390
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rate structures and mandatory water use restrictions as approved by the City Council. These actions are expected to reduce water demands during prolonged drought conditions.
The demand projections presented are conservative in that they do not fully reflect the additional demand reductions that would occur under implemented WSCP actions. As a result, actual water demands during extended dry periods may be lower than those shown.
As shown in Table 7-6, available water supplies are sufficient to meet projected demands during multiple dry year conditions.
Table 7-6: DWR 7-4R Multiple Dry Years Supply and Demand Comparison 2030 2035 2040 2045 2050
First Supply Totals, AFY 30,507 31,049 29,184 29,210 29,403 Year Demand Totals,
AFY 29,727 29,442 28,986 28,954 29,403
DIFFERENCE: 780 1,606 198 256 0
Second Supply Totals, AFY 30,507 31,049 29,184 29,210 29,403 Year Demand Totals,
AFY 27,594 27,298 26,953 27,012 27,407
DIFFERENCE: 2,913 3,751 2,232 2,198 1,997
Third Supply Totals, AFY 30,507 31,049 29,184 29,210 29,403 Year Demand Totals,
AFY 24,916 24,619 24,378 24,513 24,849
DIFFERENCE: 5,591 6,429 4,806 4,697 4,554
Fourth Supply Totals, AFY 30,507 31,049 29,184 29,210 29,403 Year Demand Totals,
AFY 24,882 24,556 24,386 24,602 24,917
DIFFERENCE: 5,625 6,493 4,798 4,608 4,486
Fifth Supply Totals, AFY 28,607 29,244 27,470 27,496 27,511 Year Demand Totals,
AFY 25,657 25,290 25,189 25,495 25,799
DIFFERENCE: 2,950 3,953 2,281 2,000 1,711
Note: Five consecutive dry years demands are expected to change based on actual demands in five consecutive dry years of 2013–2017 compared to an average year of 2011 per Table 7-3 as follows: Year 1 (108%), Year 2 (100%), Year 3 (91%), Year 4 (91%), and Year 5 (94%).
7.2.4 Description of Management Tools and Options
The City relies on local groundwater to meet demands and offset costs for imported water. As a result, the City is committed to ensuring that the basin meets sustainability goals and is 1391
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protected against seawater intrusion and other threats. The City is in the process of finalizing a stable recycled water supply for indirect potable reuse and the potential for groundwater recharge. The City also coordinates efforts with FCGMA.
7.3 Drought Risk Assessment
CWC Section 10635 (b) requires a DRA. The DRA provides a quick snapshot of the anticipated surplus or deficit if a five-consecutive year drought were to occur in the next five years. The DRA can be modified or updated outside of the UWMP five-year plan cycle, so a description of the data, methodology, and basis for shortage conditions must be included in this 2025 UWMP.
The DRA evaluates each water supply’s reliability and compares available water supplies and projected demands during a five-consecutive dry years scenario. This short-term analysis can help water suppliers foresee undesired risks, such as upcoming shortages, and provide time to evaluate and implement the necessary response actions needed to mitigate shortages in a less impactful manner to the community and environment.
7.3.1 Data, Methods, and Basis for Water Shortage Condition The DRA builds on the water service reliability analysis from Section 7.2, which incorporated assessment of historical consumption data by customer class, populated from billing records, and historical supply data by source from production reports. Based on this data, historical demand has never exceeded available supply. For this DRA analysis, normal year demand conditions and five consecutive year drought supply conditions were considered for 2026-2030.
7.3.2 DRA Individual Water Source Reliability
As described previously, the City does not anticipate any supply shortages within the next five years as shown in Table 7-7.
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Table 7-7: DWR 7-5 Five-Year Drought Risk Assessment
2026 Gross Water Use 25,578
Total Supplies 30,507
Surplus/Shortfall without WSCP Action 4,929
2027 Gross Water Use 24,630
Total Supplies 30,507
Surplus/Shortfall without WSCP Action 5,877
2028 Gross Water Use 23,043
Total Supplies 30,507
Surplus/Shortfall without WSCP Action 7,464
2029 Gross Water Use 23,817
Total Supplies 30,507
Surplus/Shortfall without WSCP Action 6,690
2030 Gross Water Use 25,393
Total Supplies 28,607
Surplus/Shortfall without WSCP Action 3,214
Note: Total water use is calculated by applying five consecutive dry year factors from (which are calculated by comparing actual potable use from 2013-2017 to 2011, as shown in Table 7-3) to a linear interpolation between actual 2025 potable use and projected 2030 potable use. 1393
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8 Water Shortage Contingency Plan
The Water Shortage Contingency Plan (WSCP) is a detailed plan for how the City intends to act in the case of an actual water shortage condition. This allows for management of a shortage with predictability and accountability. This section provides an overview of the contents of the City’s WSCP. The standalone WSCP is included in Appendix A.
IN THIS SECTION
• Overview of WSCP Components
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8.1 Introduction
The CWC Section 10632 requires that every urban water supplier shall prepare and adopt a standalone WSCP as part of its UWMP.
The City’s WSCP is included as Appendix A and will be separately submitted to DWR. The WSCP is developed independently of the City’s 2025 UWMP and can be amended, as needed, without amending the UWMP.
The WSCP is a strategic plan that the City uses to prepare for and respond to foreseeable and unforeseeable water shortages. A water shortage occurs when the water supply available is insufficient to meet the normally expected customer water use at a given point in time. A shortage may occur due to a number of reasons, such as water supply quality changes, climate change, drought, regional power outage, and catastrophic events (e.g., earthquake).
Additionally, the State may declare a statewide drought emergency and mandate that water suppliers reduce demands. The WSCP serves as the operating manual that the City will use to prevent catastrophic service disruptions through proactive, rather than reactive, mitigation of water shortages.
The WSCP provides a process for an annual water supply and demand assessment and structured steps designed to respond to actual conditions. This level of detailed planning and preparation provides accountability and predictability and will help City maintain reliable supplies and reduce the impacts of any supply shortages and/or interruptions.
The WSCP must be updated based on new requirements every five years and will be adopted as a current update for submission to DWR.
8.2 Overview of WSCP Components
The Water Code establishes several prescriptive elements that must be included in a retail water supplier’s WSCP. Each element and its location within the WSCP is described below.
Water Supply Reliability Analysis: Summarizes City’s water supply analysis and reliability and identifies any key issues that may trigger a shortage condition.
Annual Water Supply and Demand Assessment Procedures: Describes the key data inputs, evaluation criteria, and methodology for assessing the system’s reliability for the coming year and the steps to formally declare any water shortage levels and response actions.
Shortage Stages: Establishes water shortage levels to clearly identify and prepare for shortages.
Shortage Response Actions: Describes the response actions that may be implemented or considered for each stage to reduce gaps between supply and demand.
Communication Protocols: Describes communication protocols under each stage to ensure customers, the public, and government agencies are informed of shortage conditions and requirements.
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Compliance and Enforcement: Defines compliance and enforcement actions available to administer demand reductions.
Legal Authorities: Lists the legal documents that grant City the authority to declare a water shortage and implement and enforce response actions.
Financial Consequences of WSCP Activation: Describes the anticipated financial impact of implementing water shortage stages and identifies mitigation strategies to offset financial burdens.
Monitoring and Reporting: Summarizes the monitoring and reporting techniques to evaluate the effectiveness of shortage response actions and overall WSCP implementation. Results are used to determine if additional shortage response actions should be activated or if efforts are successful and response actions should be reduced.
WSCP Refinement Procedures: Describes the factors that may trigger updates to the WSCP and outlines how to complete an update.
Special Water Feature Distinctions: Identifies restrictions and applicable exemptions for decorative water features in accordance with the City’s Water Shortage Contingency Plan and water waste ordinances..
Plan Adoption, Submittal, and Availability: Describes the process for the WSCP adoption, submittal, and availability after each revision.
The WSCP was prepared in conjunction with City’s 2025 UWMP and is a standalone document that can be modified as needed. The document is compliant with the CWC Section 10632 and incorporates guidance from the DWR UWMP Guidebook (California Department of Water Resources, 2026).
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9 Demand Management Measures
This section describes City’s efforts to promote water use efficiency, reduce demand on the water supply, and prepare for future requirements through implementation of demand management measures (DMMs).
IN THIS SECTION
• Existing Demand Management
• Reporting Implementation
• Water Use Objectives
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9.1 Introduction
In 2005, the City became a signatory to the California Urban Water Conservation Council’s (CUWCC) memorandum of understanding, establishing a firm commitment to the implementation of DMMs. The CUWCC was a consensus-based partnership of agencies and organizations concerned with water supply and conservation of natural resources in California.
By becoming a member, the City demonstrated its commitment to implement a specific set of locally cost-effective conservation practices in its service area. Over the following years, CUWCC members, including the City, submitted BMP reports detailing progress.
In March 2018, the CUWCC was replaced by the California Water Efficiency Partnership (CalWEP) and the City joined the organization shortly thereafter. CalWEP’s mission is to maximize urban water efficiency and conservation throughout California by supporting and integrating innovative technologies and practices; encouraging effective public policies; advancing research, training, and public education; and building collaborative approaches and partnerships. As an active CalWEP member, the City will continue to collaborate to achieve greater water use efficiency for our local community.
The CWC requires a narrative description that addresses the nature and extent of each DMM implemented over the past five years and DMMs that the supplier plans to implement to achieve its water use targets pursuant to CWC Section 10608.20. The required DMM narratives are provided in the following subsections.
Table 9 1. Demand Management Measures
Measure
1 Water waste prevention ordinances
2 Metering
3 Conservation pricing
4 Public education and outreach
5 Programs to assess and manage distribution system real loss 6 Water conservation program coordination and staffing
7 Other DMMs
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9.2 Existing Demand Management Measures
Consistent with the requirements of CWC, this section describes the DMMs from Table 9-1 that have been implemented in the past five years and will continue to be implemented into the future in order to continue meeting the City’s water use efficiency goals and CWOL Regulation requirements.
9.2.1 Water Waste Prevention Ordinances
As detailed in Section 8, Oxnard restricts water waste through its municipal code. Oxnard City Code Chapter 22, Section 22-136, prohibits wasteful or unreasonable water use and establishes a range of specific water-saving requirements (such as limits on outdoor irrigation hours, prohibition of water runoff, and restrictions on use of potable water for washing surfaces) that apply at all times. Ordinances 2729, 2810, and 2826 are among those that have amended these provisions in the code. Section 22-154 further authorizes the City Council to designate water shortage conditions in stages (1 through 4) and to implement corresponding mandatory conservation measures when a water shortage is declared.
The City’s water use restrictions outline multi-stage conservation requirements tied to drought severity, with Stage 1 involving limits such as outdoor irrigation schedules and Stage 2 and higher stages imposing progressively stricter measures. Declaration of a water shortage stage carries specific conservation measures and possible enforcement actions, including surcharges for water use in excess of designated allotments.
In April 2023, the City declared a Stage 1 water shortage level. The Stage 1 measures listed below are in addition to the permanent measures in Chapter 22 Sections 22-136 of the City Code. Water waste prevention measures mainly include outdoor irrigation measures as listed below (City of Oxnard, 2023):
a) Watering of lawns, functional turf, trees, shrubs, vegetation, landscape and other outside irrigation is limited to three days per week.
b) The following watering schedule is established for all customers:
o Monday, Wednesday, and Saturday ONLY
c) Watering or irrigating of functional turf, landscape or other vegetated area with potable water using a landscape irrigation system or a watering device is limited to no more than 10 minutes per day per station as permitted during the three days per week watering allowance.
d) Exceptions to allow for irrigation outside of the designated periods include (1) the hand watering of trees, food plants, or other perennials with use of a container (e.g. bucket or watering can) or a hose fitted with a shut-off nozzle and (2) the use of drip irrigation or other high-efficiency irrigation systems to apply water at a weekly volume consistent with the three-day watering restriction imposed on less efficient irrigation systems. e) Potable water for irrigation of non-functional turf at commercial, industrial and institutional properties, including HOAs, is prohibited. 1399
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f) The application of potable water to landscapes during and within 48 hours after measurable rainfall is prohibited.
g) The use of potable water in a fountain or other decorative water features is prohibited, except where the water is part of a recirculating system. h) All vegetation within Wildland-Urban Interface and Defensible Space will be maintained as required under Public Resource Code 4291.
9.2.2 Metering
All of Oxnard’s customers are metered and billed volumetrically on a monthly basis using an Automatic Meter Reading (AMR) system. Commercial, industrial, and institutional accounts and parks are encouraged to have dedicated irrigation meters. In addition, Oxnard has identified Advanced Metering Infrastructure (AMI) technologies as a conservation priority. In 2025, the City successfully completed the transition from Automated Meter Reading (AMR) to Advanced Metering Infrastructure (AMI) system-wide. This technology now plays a key role in supporting water conservation efforts by improving leak detection, reducing water loss, and providing enhanced monitoring by customers for their water usage through more timely and accurate data. Customers have the opportunity to download the EyeOnWater app to see their water usage activity in real time.
9.2.3 Conservation Pricing
The City’s pricing structure is based on the March 2023 cost of service and includes both a fixed monthly service charge and a per-unit charge. The monthly fixed charge is based on meter size.
The per-unit charge includes the cost of water supply, treatment and distribution. The March 2023 Cost of Service study provides information about the tiered rate structure as well as the fixed and variable rates. It also outlines allowable drought rates. The Cost of Service Study is available at https://www.oxnard.gov/public-works/water/water-rates-fees for reference. The rate structure reflects the City’s various sources of supply, coupled with specific consumption patterns that directly impact the City’s costs. The Water Cost of Service Study in March 2023, considered operating costs, capital needs, supply costs, and other factors influencing service costs.
9.2.4 Public Education and Outreach
Public outreach is a critical component of Oxnard’s conservation efforts. Water conservation is promoted through a variety of informational programs and public events. Oxnard offers conservation educational flyers, activity booklets, public outreach displays, oral presentations, and workshops to inform the public of conservation efforts at a variety of different local community events throughout the year. Oxnard raises awareness about water conservation through paid advertising, press releases, newspaper ads, and social media, and provides its customers with a water usage comparison on their water bills. Additionally, Oxnard’s web page (Oxnard.gov/Water) provides information related to programs, rebates, water-saving tips, and announcements about upcoming events. Oxnard also benefits from outreach programs provided through the Metropolitan Water District (MWD) and Calleguas Municipal Water District (CMWD). 1400
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9.2.5 Programs to Assess and Manage Distribution System Real Losses The City repairs all reported leaks and locates and repairs unreported leaks. Additionally, the City’s Public Works Integrated Master Planning identifies aging pipelines prone to leakage to support a more robust pipeline replacement program, thereby reducing water loss from aging infrastructure.
The City recognizes the need to optimize local water resources, minimize the need for imported water, and discourage wasteful practices. The City conducts water audits, leak detection, and repairs on an ongoing basis. Through metering, the City closely monitors water production and consumption and investigates any unaccounted-for water to identify water loss. The City’s AMI metering systems identify leaks on the customers’ side of the meter. If a customer has uncharacteristically high (greater than 20% of the past month) monthly water use, the City contacts the customer for a leak evaluation. An example of optimizing water resources is the analysis performed by Waterwise Consulting, Inc. on the water usage at twenty-two City managed parks throughout the City. The program was paid for by the City of Oxnard Water Division with a grant from Metropolitan Irrigation District and resulted in saving 9,845,176 gallons of water for FY 2023/24 at a cost savings of $58,835.
The City’s field staff regularly watches for water waste and leaks, then notifies and works with customers to address the situation. Incidents of water waste are investigated, and recommendations for correction are provided. Water sources are regulated and can be disconnected in cases of excessive leakage and/or facility failure.
Since 2016, the City has annually completed an AWWA’s M36 Water Loss analysis, which consists of a component analysis of leaks into “revenue” and “non-revenue” categories, among others, and an economic analysis of recoverable loss. The most recent water loss audit was completed and verified for CY 2025.
9.2.6 Water Conservation Program Coordination and Staffing Support
Since 2021, the Water Conservation Program has experienced several staffing changes, including retirements and team members moving on to other opportunities. As of 2023, the program is composed of a full-time Water Conservation Outreach Supervisor and a Water Conservation Outreach Technician. Despite the reduction in staffing, the program continues to advance conservation efforts and remains supported through regional partnerships with the Calleguas Municipal Water District and the Metropolitan Water District’s conservation programs and staff to encourage and promote regional water efficiency.
9.2.7 Other Demand Management Measures
Residential Plumbing Retrofit: The City provides free water conservation devices to residents at water conservation events and upon request. The free water conservation devices include showerheads, kitchen faucet aerators, bathroom faucet aerators, toilet flappers, and hose nozzles.
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School Education Programs: The Water Conservation Team provides a variety of educational programs and outreach opportunities throughout Oxnard’s service area. Staff conduct educational presentations at local schools to teach students about water conservation, water sources, and the importance of protecting our water supply. The team also participates in multiple career fairs each year to raise awareness about careers in the water industry and promote workforce development. In addition, several student groups are welcomed to the Water Division annually for guided tours, offering a firsthand look at water operations and career pathways. The City also partners with a consultant who delivers interactive school assemblies focused on water education. Furthermore, the Water Division hosts the annual Water Wise Student Art Contest, which engages youth in promoting water conservation through creative expression. The winning artworks and artists are recognized in May during Water Awareness Month.
Rebates: City customers have access to various types of rebates, such as for turf replacement and water saving devices offered by Metropolitan in collaboration with Calleguas. These rebates change from year to year but when available, customers are notified by way of bill inserts and other media channels and current information is always posted on the City’s website.
Water Neutrality Policy: the City evaluates proposed developments to determine whether the proposed development is within the supply and demand forecasts contained in the City’s most recent UWMP or General Plan EIR (City of Oxnard, May 2017). Should a proposed development require additional water than previously planned for in the City’s UWMP or General Plan EIR (City of Oxnard, May 2017), then the proposed development may be required to offset its water demand with a supplemental water supply. Possible supplemental supply options may include existing FCGMA groundwater allocations that are transferred to the City, increased efficiency and water conservation or recycled water retrofit projects, additional water supplies, or a combination of efforts (City of Oxnard, May 2017). More information can be found in the Oxnard CEQA Guidelines at https://www.oxnard.gov/wp-content/uploads/CEQAGuidelines-Color.pdf.
9.3 Reporting Implementation
9.3.1 Implementation over the Past Five Years
The following sections describe the DMMs implemented by the City for the 2021 through 2025 calendar years.
9.3.1.1 Public Education
Since 2021, the City has held its Student Water Wise art contest for students participating in the Scholars After School Program. The award-winning artworks were displayed at the Oxnard Public Library during the month of May, for Water Awareness month, and the top-winning art pieces were posted on the City’s recycling trucks. The students participated in a small recognition ceremony at their respective schools, and the number one winners got to have the recycling truck visit their school to showcase their artwork. In addition, Oxnard facilitated a 1402
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school assembly program in 2021-2025 with the “H2O, Where Do You Go?” show, which meets the state education framework requirement and next generation science standards (NGSS). The presentations in 2021 were transitioned into a virtual learning format due to COVID-19 restrictions. Table 9-1 summarizes Oxnard’s water conservation education efforts from 2021 to 2025.
Table 9-1: Public Water Conservation Education 2021 - 2025 2021 2022 2023 2024 2025 TOTAL
K-6 School Live Assemblies and Virtual
Presentations 28 13 21 13 10 57
High School Visits/Secondary Education 0 2 4 4 2 12
TOTAL ESTIMATED STUDENT
AUDIENCE 14,250
9.3.1.2 Public Outreach
The City has undertaken hundreds of public outreach measures between 2021 and 2025.
Outreach messages have included subjects related to water conservation, drought, water careers, water wise landscaping, the impact of water conservation on water quality, and available rebate and retrofit offers. Total outreach activities from 2021 to 2025 are listed in Table 9-2.
Table 9-2. Public Outreach 2021-2025
OUTREACH METHOD 2021 2022 2023 2024 2025 TOTAL
Printed Messages 6 3 5 2 3 19
Presentations 4 5 17 6 16 48
Booths at Local Fairs/Events 7 4 12 21 15 59
Website Ads and Updates 6 6 4 6 4 26
Monthly Water Use Reports 12 12 12 12 12 60
Fix-A-Leak Workshops 2 2 4 2 2 12
News Releases 3 3 2 0 0 8
Newspaper Contacts/ads 4 4 2 1 2 13
Television Contacts/DMV ads 0 12 12 12 12 48
Radio Ads and Interviews 2 2 2 0 2 8
Digital Road Sign or Lawn Sign 200 12 60 0 0 272
NOTES: “Printed Messages” includes fliers, brochures, bill stuffers, door hangers, handouts, messages printed on bill, etc. “Website Ads and Updates” includes updates of www.oxnard.gov/water and ventura.watersavingplants.com
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9.3.1.3 Water Waste Tracking
The City responds to water violations, water waste reports, and leak alerts from its residents through its 311 incident reporting app and its water conservation hotline.
From 2021 to 2025, the City cataloged 2,118 alerts and issued over 1,457 warnings to reduce wasteful water use. Table 9-3 summarizes documented water waste/leak alerts and issued notices over the last five years. A significant amount of water waste notices were issued in 2022 due to the severe drought. Water conservation staff contacted customers via mail to notify them regarding observed water waste activities and to offer information such as rebates/incentives for helpful water conservation devices.
Table 9-3: Water Waste Tracking Summary 2021 - 2025
2021 2022 2023 2024 2025 TOTAL
Log Entries 115 1,102 594 151 156 2,118
Warnings/Notices
Issued 48 762 464 90 93 1,457
NOTES: Additional warnings and notices, which have been documented in the City’s alert logs, were given in person by staff, by phone or email.
9.3.1.4 Device Retrofitting
The City offers free retrofits of bathroom and irrigation fixtures to promote water conservation.
Free devices were offered every year for the last five years. In 2021, the City completed landscape audits and distributed water-efficient hose nozzles, moisture meters, shower timers, and more. Due to COVID-19 and the social distancing measures in 2021, Oxnard implemented a pilot Curbside Water Conservation Program where customers were provided with waterefficient devices to conserve water at home. Table 9-4 provides an annualized summary of distributed water devices and fixtures.
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Table 9-4: Device Retrofits 2021-2025
RETROFIT/EXCHANGE
DEVICE 2021 2022 2023 2024 2025 TOTAL
Shower Heads 1,137 500 750 697 649 3,733
Kitchen Faucet Aerators 30 15 0 0 0 45
Bathroom Faucet Aerators 2,000 300 348 97 0 2,745
Toilet Flapper 250 0 0 0 0 250
Toilet Leak Detector Tablets 850 740 2,410 2,855 426 7,281 Moisture Meters 750 500 500 572 408 2,730
Precision Irrigation Nozzles 1,500 700 700 932 1,024 4,856 Shower Timers 1,000 1,000 2,000 2,148 1,998 8,146
OVERALL TOTAL 29,786
9.3.1.5 Rebates
Oxnard residents who wish to upgrade to high-efficiency appliances and irrigation devices, as well as remove turf, are directed to the bewaterwise.com (SoCal Water$mart) website. Rebate information and bewaterwise.com links are also found on the City’s website (Oxnard.gov/water).
The rebate incentives are offered and managed by MWD in collaboration with CMWD. The City has actively promoted these residential and commercial rebates through bill inserts and social media, with approximately 1,268 customers taking advantage of the program since 2015. A summary of participation in rebate programs is provided in Table 9-4 and Table 9-5.
Table 9-5. Rebate Program Implementation, Participation Counts 2021 2022 2023 2024 2025 Total
Faucet Aerator 0 0 10 57 67
High-Efficiency Clothes
Washer 173 158 113 59 503
High-Efficiency Toilet 5 1 6 2 14
Low-Flow Showerhead 34 88 122
Rain Barrel 4 6 9 19
Rotating Nozzle 15 73 22 110
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2021 2022 2023 2024 2025 Total
Hose Bib Irrigation
Controller 4 4
Weather Based Irrigation
Controller 18 17 19 16 70
Turf 12 20 38 4 74
Table 9-6. Rebate Program Implementation, Total Rebate Values1 2021 2022 2023 2024 2025 Total
Faucet Aerator $0 $0 $43 $249 $292
High-Efficiency
Clothes Washer $16,605 $14,980 $11,815 $6,490 $49,890
High-Efficiency
Toilet $325 $65 $390 $130 $910
Low-Flow
Showerhead $441 $1,153 $1,594
Rain Barrel $140 $210 $315 $665
Rotating Nozzle $30 $593 $44 $667
Hose Bib Irrigation
Controller $140 $140
Weather Based
Irrigation
Controller
$1455 $1,608 $1,998 $1,419 $6,480
Turf $34,250 $71,381 $400,099 $48,303 $554,033
Total $52,915 $88,274 $415,694 $57,788 $614,671
1. Values are rounded to the nearest dollar.
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9.3.2 Implementation to Achieve Water Use Targets
Through the implementation of its active water conservation program, the City has met its Interim Water Use Target for 2015 and its Confirmed Water use Target for 2020. To maintain this level of water use as well as meet new future efficiency goals for CWOL Regulation compliance, the City intends to continue building and designing its outreach and programs to provide specific support for different customer sectors as appropriate.
9.4 Water Use Objectives (Future Requirements)
During the next five years, the City will continue its traditional outreach efforts while seeking improvements and innovation. This includes expanded use of data and new tools to create tailored programs that drive greater water use efficiency. The City will continue preparing to meet State-mandated water use objectives established under AB 1668 and SB 606 as part of California’s Making Conservation a California Way of Life framework. Through enhanced data analysis and targeted outreach efforts, the City will work to identify customers who may need assistance in improving water efficiency and develop messaging, programs, and incentives that support water-saving behaviors across customer sectors.
The City will also support implementation of new State regulations, including requirements related to the AB 1572 non-functional turf ban at commercial, industrial, and institutional properties, through education, outreach, and potential incentive programs that encourage the transition to more water-efficient landscapes. As an example of the City taking the lead on this, there is a Capital Improvement Program (CIP) project that the City has undertaken at four parks in the City that includes the removal of non-functional turf and replacing with native and drought tolerant plants. These parks were selected for being next to elementary schools that can be used by the students for field education that also include the native birds and pollinators that rely on these plants. Additionally, the City received a grant from the State Department of Water Resources to convert the non-functioning turf around the Civic Center into a native and drought tolerant landscape.
In addition, the water conservation program intends to leverage customer outreach and data collection capabilities from the new Automated Meter Infrastructure (AMI) system. These systems provide a wide range of opportunities to educate customers, identify and catch leaks early, and improve customer service and business processes. With a larger data set of consumption information across usage sectors, patterns can be analyzed to identify potential water savings and efficiencies.
These programs, and others, will support the City’s achievement of its water use objectives and ensure compliance with evolving State regulations while continuing to promote water efficiency as an Oxnard way of life.
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10 Plan Adoption, Submittal, and
Implementation
This section describes the completed steps taken to make the UWMP publicly available as well as adopt and submit the UWMP in accordance with the California Water Code.
IN THIS SECTION
• Completed Steps for UWMP and
WSCP
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10.1 Completed Steps for UWMP and WSCP
The 2025 UWMP and WSCP were made available for public review in May 20261, and a public hearing was held on June X, 2026, at the City Council meeting to receive public input on the draft documents. Per Government Code 6066, the public hearing was noticed in the [newspaper name] newspaper on May/June X, 2026, and noticed again on May/June X, 2026. Additionally, the City issued a notice to County of Ventura County more than 60 days prior to the public hearing. All notice documentation is included in Appendix D.
The City Council adopted the Final 2025 UWMP and the WSCP at a public meeting on June XX, 2026. Additionally, the City issued a notice to County of Ventura more than 60 days prior to the public hearing. A copy of the resolution of adoption is included in Appendix E.
This UWMP was submitted to DWR through the WUEData portal before the deadline of July 1, 2026, and will be available to the public on the City’s website.
If City identifies the need to amend this UWMP or WSCP, it will follow the same procedures used previously for notification to cities, counties, and the public and for initial adoption. 1 All highlighted text to be updated after public review and adoption. 1409
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2025 Urban Water Management Plan- Draft | REF-1
References
AECOM for the City of Oxnard. (2015). Water Operations Support Technical Memorandum No. 7 Review of Water Supply Contracts. Oxnard: City of Oxnard.
California Data Collaborative for Calleguas Municipal Water District. (February 2021). Draft Imported Water Outage Protocal - Allocation Framework and Public Outreach. Calleguas Municipal Water District.
California Department of Water Resources. (2026). Urban Water Management Plan Guidebook 2025. Sacramento: California Department of Water Resources.
California Department of Water Resources. (n.d.). California's Groundwater (Bulletin 118).
Retrieved from https://water.ca.gov/Programs/Groundwater-Management/Bulletin-118 California Department of Water Resources. (March 2016). 2015 Urban Water Management Plans Guidebook for Urban Water Suppliers.
Carollo for the City of Oxnard. (2017). Advanced Water Purification Facility Indirect Potable Reuse Engineering Report. Oxnard: City of Oxnard.
Carollo for the City of Oxnard. (December 2015). Public Works Integrated Master Plan, Water, Project Memorandum 2.2 Water Demand Projections Final Draft. Oxnard: City of Oxnard.
City of Oxnard. (2014). 2030 General Plan Map. Oxnard: City of Oxnard.
City of Oxnard. (2021, May). Climate Action and Adaptation Plan. Retrieved from City of Oxnard: https://www.oxnard.org/climate-action-plan/
City of Oxnard. (2023, April 23). Water Use Restrictions. Retrieved March 12, 2026, from https://www.oxnard.gov/public-works/water/water-use-restrictions City of Oxnard. (2025). City of Oxnard 2024 General Plan Annual Progress Report.
City of Oxnard. (2026, March 12). Advanced Metering Infrastructure (AMI) Replacement.
Retrieved from https://www.oxnard.gov/project/advanced-metering-infrastructurereplacement City of Oxnard Development Services Department. (2013). Energy Action Plan. Oxnard: City of Oxnard .
City of Oxnard. (May 2017). City of Oxnard CEQA Guidelines. Oxnard: City of Oxnard.
City of Oxnard. (n.d.). Oxnard, California Codified Ordinances. Retrieved from American Legal Publishing Corporation:
https://codelibrary.amlegal.com/codes/oxnard/latest/oxnard_ca/0-0-0-30106 1410
City of Oxnard References
2025 Urban Water Management Plan- Draft | REF-2
City of Oxnard. (n.d.). Oxnard, California Codified Ordinances. Retrieved from American Legal Publishing Corporation:
https://codelibrary.amlegal.com/codes/oxnard/latest/oxnard_ca/0-0-0-30106 Department of Finance, State of California. (2021). E-5 Population and Housing Estiamtes for Cities, Counties, and the State, 2011-2021 with Census Benchmark. Retrieved from Estimates: https://www.dof.ca.gov/Forecasting/Demographics/Estimates/e-5/ Dudek. (December 2019). Groundwater Sustainability Plan for Oxnard Subbasin. Retrieved from https://fcgma.org/oxnard-subbasin-gsp-files/#docaccess1db8b222275b69a81661d58be2e3dfb5 Dudek. (January 2025). Revised First Periodic Evaluation Groundwater Sustainability Plan for the Oxnard Subbasin. Retrieved from https://fcgma.org/gsp-periodicevaluations/#docaccess89b2fdb967d0446d3fd5b605f44fa76b574b8397da8ac2df1abfdfb47a146ae0 ESA. (2020). City of Oxnard CAP Project - GHG Inventory Data Needs for Municipal Operations Inventory.
Fox Canyon Groundwater Management Agency. (2019). Groundwater Sustainability Plan for the Oxnard Subbasin. Ventura: Fox Canyon Groundwater Management Agency.
Gannett Fleming for the City of Oxnard. (May 2021). Water Resource Management Plan Final Draft . Oxnard: City of Oxnard.
Matrix Design Group, Inc. for the City of Oxnard. (April 2006). City of Oxnard General Plan Draft Background Report. Oxnard: City of Oxnard.
Metropolitan Water District of Southern California. (2025). Draft 2025 Urban Water Management Plan.
MNS Engineers, Inc. for the City of Oxnard. (January 2018). 2015 Urban Water Management Plan with Errata Included. Oxnard: City of Oxnard.
MNS Engineers, Inc. for the City of Oxnard. (January 2018). 2015 Urban Water Management Plan with Errata Included. Oxnard: City of Oxnard.
N.S. Oakley, B.J. Hatchett, D. McEvoy, and L. Rodriguez. (June 2019). Projected Changes in Ventura County Climate. Western Regional Climate Center, Desert Research Institute, Reno, Nevada. Available at: https://wrcc.dri.edu/Climate/reports.php. Retrieved from Western Regional Climate Center, Desert Research Institute, Reno, Nevada. Available at: https://wrcc.dri.edu/Climate/reports.php.
Oxnard, A. f. (2015). Water Operations Support Technical Memorandum No. 7 Review of Water Supply Contracts. Oxnard: City of Oxnard.
Southern California Association of Governments . (March 4, 2021). 6th Cycle Final RHNA Allocation Plan (pending HCD approval). Southern California Association of Governments .
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Southern California Association of Governments. (2024). Connect SoCal 2024 Demographics & Growth Forecast Technical Report.
Southern California Association of Governments. (March 4, 2021). 6th Cycle Final RHNA Allocation Plan (pending HCD approval). Southern California Association of Governments.
Southern California Association of Governments. (September 2020). Connect SoCal-The 2020- 2045 Regional Transportation Plan/Sustainable Communities Strategy. Southern California Association of Governments.
Stantec Consulting Services Inc. Prepared for United Water Conservation District. (2021). 2020 Urban Water Managment Plan for United Water Conservation District. Oxnard: United Water Conservation District.
State of California Department of Water Resources. (2021). Methodologies for Calculating Baseline and Compliance Urban Per Capita Water Use.
State of California Department of Water Resources. (2026). Urban Water Management Plan Guidebook.
State of California Department of Water Resources. (March 2021). Urban Water Management Plan Guidebook 2020.
United Water Conservation District. (April 2026). United Water Conservation District’s 2025 Urban Water Management Plan Public Review Draft. Retrieved from https://www.unitedwater.org/key-documents/
US Census Bureau. (2024). Population Estimates Base, April 1, 2020.
US Census Bureau. (n.d.). 2024 QuickFacts Oxnard City, CA. Retrieved March 16, 2026, from QuickFacts:
https://www.census.gov/quickfacts/fact/table/oxnardcitycalifornia/PST045224 Water Systems Consulting, Inc. (2026). Calleguas Municipal Water District 2025 Urban Water Management Plan.
Water Systems Consulting, Inc. (May 2026). Calleguas Municipal Water District 2025 Urban Water Management Plan. Retrieved from
https://www.calleguas.com/transparency/general-information/ Water Systems Consulting, Inc. (May 2026). Calleguas Municipal Water District 2025 Water Shortage Contingency Plan. Retrieved from
https://www.calleguas.com/transparency/general-information/ 1412
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2025 Urban Water Management Plan- Draft | A
Appendix A Water Shortage
Contingency Plan
A
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Water Shortage
Contingency PlanAdmin Draft
MARCH 2026 City of Oxnard
PUBLIC DRAFT
2025 WATER
SHORTAGE
CONTINGENCY PLAN
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C I T Y O F O X N A R D
Water Shortage
Contingency Plan – Public
Draft
MAY 2026
Prepared by Water Systems Consulting, Inc.
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City of Oxnard ii Water Shortage Contingency Plan – Public Draft
TABLE OF CONTENTS
List of Tables ..................................................................................................................................................... iii Appendix A: Water Shortage Contingency Plan........................................................................................1
1.1 Water Supply Reliability Analysis ....................................................................................................3
1.2 Annual Water Supply and Demand Assessment.............................................................................3
1.2.1 Key Data Inputs............................................................................................................................3
1.2.2 Evaluation Criteria.......................................................................................................................4
1.2.3 Annual Water Supply and Demand Assessment Procedure................................................4
1.3 Six Standard Water Shortage Levels ..............................................................................................5
1.4 Shortage Response Actions.................................................................................................................6
1.4.1 Demand Reduction.......................................................................................................................6
1.4.2 Supply Augmentation............................................................................................................... 12
1.4.3 Operational Changes .............................................................................................................. 12
1.4.4 Additional Mandatory Restrictions ........................................................................................ 12
1.4.5 Emergency Response Plan....................................................................................................... 13
1.4.6 Seismic Risk Assessment and Mitigation Plan....................................................................... 13
1.4.7 Shortage Response Action Effectiveness............................................................................... 14
1.5 Communication Protocols.................................................................................................................. 14
1.6 Compliance and Enforcement.......................................................................................................... 16
1.7 Legal Authorities ................................................................................................................................ 16
1.8 Financial Consequences of WSCP .................................................................................................. 17
1.9 Monitoring and Reporting................................................................................................................ 17
1.10 WSCP Refinement Procedures...................................................................................................... 17
1.11 Special Water Feature Distinction ............................................................................................... 17
1.12 Plan Adoption, Submittal, and Availability................................................................................ 18
1.13 Resources and References ............................................................................................................. 19 1417
Appendix A
City of Oxnard iii Water Shortage Contingency Plan – Public Draft
LIST OF TABLES
Table 1. Key Data Inputs for the Annual Assessment .................................................................................3 Table 2. DWR 8-1 Water Shortage Contingency Plan Levels.................................................................5 Table 3. DWR 8-2 Demand Reduction Actions............................................................................................7 Table 4. Estimated Savings by Response Action Type............................................................................ 14 Table 5. Communication and Outreach Actions by Shortage Stage. ................................................... 15 1418
Appendix A
City of Oxnard 1 Water Shortage Contingency Plan – Public Draft Water Shortage Contingency Plan
This Water Shortage Contingency Plan (WSCP) is a detailed plan for how the City of Oxnard (City) intends to predict and respond to foreseeable and unforeseeable water shortages.
A water shortage occurs when the water supply is reduced to a level that cannot support typical demand at any given time. The WSCP is used to provide guidance to the City’s governing body, staff, and the public by identifying anticipated shortages and response actions to allow for efficient management of any water shortage with predictability and accountability. Preparation provides the tools to maintain reliable supplies and reduce the impacts of supply interruptions due to a range of conditions including extended drought, production capacity limitations, catastrophic supply interruptions, or other unforeseen shortages.
IN THIS SECTION
• Water Supply
Reliability Analysis
• Annual Supply and
Demand Assessment
• Water Shortage
Stages
• Shortage Response
Actions
• Communication
Protocols
• Compliance,
Enforcement, and
Legal Authority
• Financial
Consequences
• Implementation
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Appendix A
City of Oxnard 2 Water Shortage Contingency Plan – Public Draft The WSCP describes the following:
Water Supply Reliability Analysis: Summarizes the City’s water supply analysis and reliability and identifies any key issues that may trigger a shortage condition.
Annual Water Supply and Demand Assessment Procedures: Describes the key data inputs, evaluation criteria, and methodology for assessing the system’s reliability for the coming year and the steps to formally declare any water shortage levels and response actions.
Six Standard Shortage Stages: Establishes water shortage levels to clearly identify and prepare for shortages.
Shortage Response Actions: Describes the response actions that may be implemented or considered for each stage to reduce gaps between supply and demand.
Communication Protocols: Describes communication protocols under each stage to ensure customers, the public, and government agencies are informed of shortage conditions and requirements.
Compliance and Enforcement: Defines compliance and enforcement actions available to administer demand reductions.
Legal Authority: Lists the legal documents that grant the City the authority to declare a water shortage and implement and enforce response actions.
Financial Consequences of WSCP Implementation: Describes the anticipated financial impact of implementing water shortage stages and identifies mitigation strategies to offset financial burdens.
Monitoring and Reporting: Summarizes the monitoring and reporting techniques to evaluate the effectiveness of shortage response actions and overall WSCP implementation. Results are used to determine if additional shortage response actions should be activated or if efforts are successful and response actions should be reduced.
WSCP Refinement Procedures: Describes the factors that may trigger updates to the WSCP and outlines how to complete an update.
Special Water Features Distinctions: Identifies exemptions for decorative features aside from pools and spas.
Plan Adoption, Submittal, and Availability: Describes the process for the WSCP adoption, submittal, and availability after each revision.
This WSCP was prepared in conjunction with the City’s 2025 Urban Water Management Plan (UWMP) and is a standalone document that can be modified as needed. This document is compliant with the California Water Code (CWC) Section 10632 and incorporated guidance from the State of California Department of Water Resources (DWR) UWMP Guidebook (California Department of Water Resources 2026).
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City of Oxnard 3 Water Shortage Contingency Plan – Public Draft
1.1 Water Supply Reliability Analysis
As part of the 2025 UWMP, the City performed a supply reliability analysis for normal, single-dry, and five-year consecutive dry periods. The analysis considered different factors that influenced the City’s various supply sources. The City has a very diverse supply portfolio and will manage it to meet customer demands under all water year scenarios. However, the City will continue to promote conservation as an important component of the portfolio that may be more cost effective than use of other supplies.
The 2025 UWMP also includes a Drought Risk Assessment (DRA) to analyze supply reliability for 2026-2030 considering normal, unconstrained demand. Unconstrained demand refers to the typical demand not influenced by other factors, such as demand reduction or limitations on use. The DRA assessed future reliability based on consideration of historical supply availability and potential changes to historical conditions in the future. While the Water Service Reliability and DRA of the 2025 UWMP identify the ability meet demand under most historical and anticipated dry year conditions, there is the potential for supply to not meet unconstrained demands through 2050 without conservation.
Furthermore, there is potential for supply to be significantly impacted by catastrophic factors, such as natural disasters and operational/infrastructure failure events. This WSCP addresses the process to assess and address shortages under these catastrophic conditions.
1.2 Annual Water Supply and Demand Assessment
The City performs an Annual Water Supply and Demand Assessment (Annual Assessment) each year by July 1st for the following fiscal year to determine if there is a need to implement the WSCP and to what extent. Key data inputs, evaluation criteria, and procedures for developing the Annual Assessment are described in this section.
1.2.1 Key Data Inputs
Key data inputs and their sources for the Annual Assessment are summarized in Table 1.
Table 1. Key Data Inputs for the Annual Assessment
KEY DATA INPUT SOURCE
City of Oxnard Groundwater City production reports and supply allocations United Water Conservation District (United) O-H
Groundwater
City production reports and supply allocations
Calleguas Municipal Water District (Calleguas)
Imported Water
Each spring, the City provides a water use projection to Calleguas for the following five years. Oxnard and the
Port Hueneme Water Agency share an allotment, which
is based on the historical 10-year use.
*The City is not limited by the allotment and may
purchase more water if necessary. The City tries to
avoid using Calleguas water as much as possible to
keep costs down.
Recycled Water City production reports
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Appendix A
City of Oxnard 4 Water Shortage Contingency Plan – Public Draft
1.2.2 Evaluation Criteria
Staff will use the key data inputs and Annual Assessment procedures to evaluate supply reliability.
Supply reliability is based on dry year supply availability and typical unconstrained demand, as calculated in the City’s UWMP. The City will determine supply levels in the Annual Assessment and calculate if there is a shortage, compared to normal year supply conditions. The City will also consider any shortage declarations established by Calleguas Municipal Water District (Calleguas), a member agency of the Metropolitan Water District of Southern California (Metropolitan), in the analysis.
Additional conditions that may be evaluated include the loss of any supply sources or key infrastructure (such as the Oxnard-Hueneme pipeline), any natural disasters, or State-mandated declarations or policies. In the event that any critical components are impacted and unable to support the City, the City will reevaluate and work to regain supply sources as quickly as possible.
1.2.3 Annual Water Supply and Demand Assessment Procedure The City performs the Annual Assessment prior to July 1 st each year. Steps to conduct the Annual
Assessment are as follows:
1. The Annual Assessment is led by the Water Resources Manager. The Water Resources Manager shall coordinate with conservation, production, distribution, recycled water, and development staff as necessary to prepare the Annual Assessment.
2. Staff will evaluate supply amounts for the coming year. a. City groundwater: Staff will analyze historical production and anticipated production. i. Determine if there are any maintenance needs that would require a shut-down of any wells.
ii. Determine if there is a need to decrease typical pumping to protect against seawater intrusion or contamination.
iii. Fox Canyon Groundwater Management Agency (FCGMA) sets allocations for water years (October 1 – September 30). It is expected that FCGMA will communicate allocations to Oxnard in a timely manner. Based on the past, allocations have been set no less than one year in advance. b. United Water Conservation District (United) Groundwater i. Distinguish if there are any planned outages that would restrict United from delivering water to Oxnard.
c. Calleguas imported water availability
i. Distinguish if there are any limitations on allocations imposed by Calleguas or Metropolitan.
d. Recycled Water
i. Recycled water supply should be stable and quantities known once in full operation. The City will track recycled water supply and storage amounts. e. Infrastructure updates or limitations
i. Staff will identify any pieces of infrastructure that are out of service or in need of maintenance within the next year.
ii. Staff will identify any on-going water supply projects that will be complete within the next year and will be available as a supply source. f. Staff will track supply for the previous year by supply source on a monthly basis to develop estimates of available supply for the coming year.
3. Staff will forecast the demand for the coming year.
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City of Oxnard 5 Water Shortage Contingency Plan – Public Draft a. Staff will continue to monitor demand for supply blending purposes. b. Staff will track demand for the previous year by customer class on a monthly basis to inform demand estimates for the coming year.
c. Staff will consider any drought declarations in place as determined by the U.S. Drought Monitor (USDM), which is updated each Thursday to show the location and intensity of drought across California using a five-category system, from Abnormally Dry (D0) conditions to Exceptional Drought (D4).
d. Staff will consider any State-mandated declarations and policies that may influence water demand.
4. Demands will first be met by local supply sources to the extent possible, and then supplemented with imported water from Calleguas.
5. Staff will analyze the total supply available compared to normal supply to determine if there are supply reductions. The percentage of deficit will be calculated and related to the shortage stages identified in the following section.
6. Staff will analyze the total supply available for the coming year and compare to the future demand to determine if there is a supply/demand gap. The percentage of deficit will be calculated and related to the shortage stages in this WSCP. a. Staff will assess if there is a need to implement the WSCP and the corresponding shortage stage declaration.
7. Staff will compile the Annual Assessment findings and may present recommendations to the Public Works and Transportation Committee, then to the City Council, if a shortage is anticipated. The City Council will determine if a shortage stage should be declared and may make that declaration.
1.3 Six Standard Water Shortage Levels
Water suppliers must align with six standard water shortage levels as mandated by water code.
Shortage levels indicate the gap between supply and demand compared to normal year conditions.
DWR standardized six shortage levels to provide a consistent regional and statewide approach to measure water supply shortage conditions. The six shortage levels correspond to 10-, 20-, 30-, 40-, 50- percent (%), and greater than 50% shortage compared to the normal reliability conditions. However, a water supplier may use its own shortage levels if a crosswalk is included relating its existing shortage levels to the six standard levels. The crosswalk between the City’s four levels and the standard water shortage levels is shown in Table 2.
Table 2. DWR 8-1 Water Shortage Contingency Plan Levels Crosswalk 1423
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City of Oxnard 6 Water Shortage Contingency Plan – Public Draft
1.4 Shortage Response Actions
The City developed a variety of shortage response actions to implement during each given shortage stage. In the event of a water shortage emergency, the City will evaluate the cause of the emergency to help inform which response actions should be implemented. Depending on the nature of the water shortage, the City can elect to implement one or several response actions to mitigate the shortage and reduce gaps between supply and demand. The City has identified actions that fall within supply augmentation, demand reduction, operational changes, and additional mandatory restrictions, as recommended by DWR. If necessary, the City may adjust actions or adopt additional actions not listed.
During a declared water shortage condition, the water sources available to the City will be put to the maximum beneficial use to the greatest extent possible. The waste or unreasonable use of water will be prevented, and water available will be conserved for public welfare in the interests of City residents.
Examples of the City’s general water waste prohibitions and restrictions include limits on outdoor irrigation watering hours; limits on running water duration; no run-off; drinking water service upon request (water served only upon customer request at public places where food is served); various prohibitions in the commercial sector; no filling or refilling of swimming pools; and waste in general, including any indiscriminate use of water which is wasteful.
1.4.1 Demand Reduction
The City has identified a variety of potential demand reduction actions to offset supply shortages.
These actions include, but are not limited to conservation and rebate programs, leak detection and repair, covers for pools and spas, equipping hoses with automatic shut-off nozzles, and others as shown in Table 3.
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City of Oxnard 7 Water Shortage Contingency Plan – Public Draft Table 3. DWR 8-2 Demand Reduction Actions
SHORTAGE LEVEL DEMAND REDUCTION ACTIONS SHORTAGE GAP
REDUCTION, AFY
ADDITIONAL EXPLANATION OR REFERENCE PENALTY,
CHARGE, OR
OTHER
ENFORCEMENT
All Expand Public Information Campaign Yes
All Reduce System Water Loss Yes
All Other - Customers must repair leaks, breaks, and
malfunctions in a timely manner
5,196 EPA Cases in Water Conservation: How Efficiency
Programs Help Water Utilities Save Water and
Avoid Costs (United States Environmental
Protection Agency, Office of Water, 2002)
Yes
All Other water feature or swimming pool restriction Draining of pools or refilliong shall be done only for health and safety reasons.
Yes
All CII - Restaurants may only serve water upon request 12 Southwest Florida Water Management (Southwest Florida Water Management District, 2018)
Yes
All CII - Lodging establishment must offer opt out of linen service
Yes
All CII - Commercial kitchens required to use pre-rinse spray valves
1,824 EPA WaterSense, Saving Water in Restaurants
(United States Environmental Protection Agency,
2012)
Yes
All Pools and Spas - Require covers for pools and spas 26 Arlington, Virginia, Water & Utilities. (Arlington County Government, n.d.)
Yes
All Landscape - Other landscape restriction or prohibition Free flowing hoses are prohibited; automatic shutoff hoses are required.Yes All Landscape - Restrict or prohibit runoff from landscape irrigation
Yes
All Landscape - Limit landscape irrigation to specific times 301 Texas Living Waters (Texas Living Waters Project, 2018)
Yes
All Landscape - Limit landscape irrigation to specific days 840 CalWep WSCP Toolkit 2021; City of Sacramento and City of Clovis; AWE Use and Effectiveness of
Municipal Irrigation Restrictions During Drought
Study Report, January 2020. (California Water
Efficiency Partnership, 2021)
Yes
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SHORTAGE LEVEL DEMAND REDUCTION ACTIONS SHORTAGE GAP
REDUCTION, AFY
ADDITIONAL EXPLANATION OR REFERENCE PENALTY,
CHARGE, OR
OTHER
ENFORCEMENT
All Landscape - Limit landscape irrigation to specific days Irrigation of parks, school ground areas, and road median landscaping will not be permitted more
than twice a week and only if necessary.
All Landscape - Prohibit certain types of landscape irrigation Irrigation of ornamental turf on public medians with potable water prohibited.
Yes
All Landscape - Other landscape restriction or prohibition Limits on watering duration. Watering or irrigation of lawns, landscape or other vegetated area with
potable water using a landscape irrigation system
or a watering device that is not continuously
attended is limited to no more than 15 minutes per
day per station. This does not apply to landscape
irrigation systems that exclusively use high
efficiency irrigation equipment, very low-flow drip
type irrigation systems when no emitter produces
more than two gallons of water per hour, and
weather based controllers or high-efficiency
stream rotor sprinklers.
All Landscape - Restrict or prohibit runoff from landscape irrigation
Irrigation of newly constructed home and building
exteriors with potable water is prohibited unless
drip or microspray systems are used.
Yes
All Landscape - Other landscape restriction or prohibition Golf course water use shall be limited. Limitation on the irrigation of roughs shall be implemented
before limitations on fairway irrigation. Efficient
use of recycled water on any golf course shall not
be limited.
All Landscape - Other landscape restriction or prohibition Application of potable water to landscapes during and within 48 hours after measurable rainfall is
prohibited.
Yes
All Other - Require automatic shut of hoses 8 Maryland Department of the Environment (Maryland Department of the Environment, n.d.)
Yes
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SHORTAGE LEVEL DEMAND REDUCTION ACTIONS SHORTAGE GAP
REDUCTION, AFY
ADDITIONAL EXPLANATION OR REFERENCE PENALTY,
CHARGE, OR
OTHER
ENFORCEMENT
All Other - Prohibit use of potable water for construction and dust control
2,361 Maryland Department of the Environment
(Maryland Department of the Environment, n.d.)
Yes
All Other The City may not issue new construction meters or short-term water use unless reclaimed or nonpotable water is used, unless potable water is necessary to protect the health, safety, or welfare.
Yes
All Other - Prohibit use of potable water for washing hard surfaces
No water use to clean surfaces. The use of running
water from a hose, pipe, or faucet to clean
buildings, pavement, tile, wood, plastic, driveways,
parking lots, and other paved surfaces is
prohibited, except for public health and safety
reasons and then only with a hose and automatic
shut-off nozzle.
Yes
All Decrease Line Flushing 143 CalWep WSCP Toolkit 2021; City of Clovis (California Water Efficiency Partnership, 2021)
Yes
All Implement or Modify Drought Rate Structure or Surcharge Yes All Other 4,936 All types of rebates; EPA Cases in Water Conservation: How Efficiency Programs Help
Water Utilities Save Water and Avoid Costs;
Evaluating the Effectiveness of a Water
Conservation Campaign: Combining Experimental
and Field Methods (United States Environmental
Protection Agency, Office of Water, 2002)
Yes
2 & Up Other Reduce indoor and outdoor water use by specified percentage as determined (based on Shortage
Stage). Contact the City Water Division or visit
OxnardWater.org for additional tips and
techniques to reduce water use.
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SHORTAGE LEVEL DEMAND REDUCTION ACTIONS SHORTAGE GAP
REDUCTION, AFY
ADDITIONAL EXPLANATION OR REFERENCE PENALTY,
CHARGE, OR
OTHER
ENFORCEMENT
2 & Up Other The use of water from fire hydrants shall be limited to fire fighting and related activities and
other uses of water for municipal purposes shall be
limited to activities necessary to maintain the
public health, safety, and welfare.
2 & Up Other Commercial car wash and laundry systems.
Installation of new or replacement non recirculating water systems in commercial conveyor car wash or commercial laundry systems is
prohibited.
2 & Up Other The manager shall grant prior approval for water to be used on a one-time or short-term basis for
construction and dust control. The user shall submit
to the manager its water use plan at least 30 days
in advance of the proposed use.
3 & Up Other Commercial/industrial cooling systems: installation of new or replacement single pass cooling systems
in commercial or industrial buildings is prohibited.
Yes
3 & Up Water Features - Restrict water use for decorative water features, such as fountains
Yes
3 & Up Water Features - Restrict water use for decorative water features, such as fountains
Where and when available, approved nonpotable water shall be used to fill or refill recreational or ornamental lakes, ponds, or
fountains. When using non-potable water, the user
shall post signs in conspicuous areas identifying the
fact that non-potable water is being used. Newly
installed or replacement ponds and fountains shall
include recirculation pump(s) that maximize the
efficiency and reuse of fill water.
3 & Up Other water feature or swimming pool restriction Watering to maintain the level of water in swimming pools shall occur only when essential.
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SHORTAGE LEVEL DEMAND REDUCTION ACTIONS SHORTAGE GAP
REDUCTION, AFY
ADDITIONAL EXPLANATION OR REFERENCE PENALTY,
CHARGE, OR
OTHER
ENFORCEMENT
4 & Up Other - Prohibit vehicle washing except at facilities using recycled or recirculating water
4 & Up Landscape - Other landscape restriction or prohibition Depending on the drought severity, the use of potable water for irrigation uses may be
restricted or prohibited. The manager shall have
the right to shut off water service to any such
irrigation service upon seven days advance notice
to the customer.
Yes
4 & Up Other Issuance of building permits which require new or expanded water service may be limited or
withheld, except to protect the public's health,
safety and welfare, or in cases which meet the
City Council adopted conservation and offset
requirements.
Yes
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1.4.2 Supply Augmentation
The City has a diverse supply portfolio and is currently looking to expand supply with additional permanent sources as discussed in Chapter 6 of the UWMP. The City expects to meet any supply shortages through adaptive supply portfolio management, effective communication and outreach efforts, operational changes, and demand reduction efforts from their customers.
1.4.3 Operational Changes
The City has identified several possible changes to maximize supply and reduce demand during a water shortage stage. These potential City actions could include, but are not limited to:
➢ Flush watermains only on a complaint basis and/or suspend or modify its routine flushing schedule to reduce operational water use.
➢ Monitor construction meters and fire hydrant meters for efficient water use. In the event that a meter identifies wastes water, the City will take swift action to correct errors and ensure efficiency.
➢ Restrict issuance of new permits for hydrant-construction or temporary construction meters. ➢ Limit issuance of building permits which require new or expanded water service, except in cases that protect public health, safety and welfare as deemed by the City Council. ➢ In severe water shortages, implement water emergency tiered pricing, pursuant to the requirements of Proposition 218 and in accordance with California Law. ➢ Conduct water waste patrols in cooperation with staff from other departments. ➢ Suspend consideration of annexations to its service area, unless the annexation increases the water supply available to the City more than the anticipated demands of the property to be annexed.
1.4.4 Additional Mandatory Restrictions
The City has identified additional mandatory restrictions to implement during a water shortage. Such restrictions will first be evaluated on the type of shortage condition. Restrictions could include, but are not limited to:
➢ Irrigation of newly constructed home and building exteriors with potable water is prohibited unless drip or micro spray systems are used.
➢ Irrigation of ornamental turf on public medians with potable water is prohibited. ➢ The use of potable water for sanitation, irrigation and construction purposes, including but not limited to dust control, settling of backfill, flushing of plumbing lines, and washing of equipment, buildings and vehicles, shall be prohibited in all cases where it has been determined that use of reclaimed, recycled or other forms of non-potable water use is a feasible alternative. ➢ Free flowing hoses are prohibited. Automatic shut-off hoses are required. ➢ No use of water to clean surfaces. The use of running water from a hose, pipe, or faucet to clean buildings, pavement, tile, wood, plastic, driveways, parking lots, and other paved surfaces is prohibited, except for public health and safety reasons and then only with a hose with an automatic shut-off nozzle.
➢ Application of potable water to landscapes during and within 48 hours after measurable rainfall is prohibited.
➢ Prohibit vehicle washing except at facilities using recycled or recirculating systems. 1430
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1.4.5 Emergency Response Plan
Water supplies as well as other public facilities can be negatively impacted by catastrophic events, including regional power outages and earthquakes. The City of Oxnard Water Division Water System Emergency Response Plan (ERP) (AECOM for the City of Oxnard Water Division, January 2020) identifies action plans for various emergencies. Compared to many other purveyors, the City is wellpositioned to respond to such events because:
➢ The City has multiple sources of water, including Calleguas, United and City wells. ➢ Calleguas has an Imported Water Outage Protocol (IWOP). The IWOP is a local planning effort and follows a recommendation from the Calleguas’ Water Supply Alternatives Study to “prepare and codify a methodology for demand reduction during an outage.” ➢ The City’s pipeline system has a tremendous by-pass system (“looping”), referring to the interconnection of pipelines and avoidance of critical pipelines where a break due to a seismic event, for example, would leave substantial areas of the City without water. ➢ In terms of a regional power outage, the City has back-up diesel generators at its major facilities (i.e., blending stations and water wells). United also has generation capacity. There is also additional pumping capacity plus diesel-powered generation capacity at all wellfields and the Desalter facility.
1.4.6 Seismic Risk Assessment and Mitigation Plan
The City completed an update to their Emergency Response Plan (ERP) and performed a Risk and Resiliency Assessment (RRA) (AECOM for the City of Oxnard Water Division, January 2020) that analyzes seismic events and mitigation actions to offset any impacts from such an event. The ERP and RRA were performed in accordance with America’s Water Infrastructure Act (AWIA) of 2018. The purpose of the RRA and ERP is to meet the AWIA compliance requirements and plan for long-term resilience of the City’s infrastructure.
The RRA assessed the City’s water system to identify critical assets that may be vulnerable to malevolent threats and natural hazards such as a seismic event, as well as identified measures that can be taken to reduce risk and enhance resilience from service disruption for the benefit of customers.
The RRA identifies and characterizes both infrastructure-specific and system-wide vulnerabilities and threats in addition to the consequences of disruption. The RRA also recognizes various options in addressing and mitigating risk due to intentional or accidental threats as well as natural hazards.
The ERP includes prevention and detection measures for a wide range of emergency situations. In the case of a seismic event, the ERP includes specific responses to mitigate damage and provide safety for staff during the event as well as documents detailed responses and action items to complete following the event.
The RRA, in conjunction with the ERP, charts a course for water system resilience. Since critical pieces of infrastructure and specific vulnerabilities are detailed in the RRA and critical response procedures are outlined in the ERP, the contents of these documents are confidential and for use by City staff only.
However, the City can confirm that these plans meet the requirements set forth by AWIA and evaluate seismic risks and mitigation actions to the City’s infrastructure.
The City also participated in the development of the 2022 Ventura County Multi-Jurisdictional Hazard Mitigation Plan (MHMP) (Tetra Tech, County of Ventura, Ventura County Sheriff Emergency Services, 2022). The MHMP analyzed the vulnerability of water facilities, including various lift stations, blending stations, and the wastewater treatment plant. The MHMP identified potential hazards that could affect the City, such as earthquakes and landslides. In addition, the MHMP summarizes financial, legal, and regulatory resources to mitigate the effects if any hazard were to occur, as well as mitigation projects, programs, and other actions. Furthermore, since the City obtains water from Calleguas and United, it is important to note that both Calleguas and United also participated in development of the MHMP. 1431
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City of Oxnard 14 Water Shortage Contingency Plan – Public Draft
1.4.7 Shortage Response Action Effectiveness
The City has estimated the effectiveness of shortage response actions when data pertaining to such actions is available. Estimates of the effectiveness of actions has been included in Table 3, assuming these actions are supported by successful communication and outreach efforts. A summary of the potential savings by each action class is provided in Table 4.
Table 4. Estimated Savings by Response Action Type
ACTION TYPE ESTIMATED POTENTIAL SAVINGS, AFY PERCENTAGE OF ESTIMATED SAVINGS
BY ACTION TYPE
Demand Reduction 7,429 80%
Operational Changes 143 2%
Additional Mandatory Restrictions 1,738 19%
Communication Efforts - -
Total 9,310 100%
1.5 Communication Protocols
The City has developed an extensive plan to communicate the declaration of a shortage stage, inform restrictions, and provide updates during a water shortage stage. The City’s Code authorizes the City Manager to issue notices pertaining to the WSCP and implement public outreach through press releases, print and broadcast media, and written and verbal communications to specifically impacted industry groups (such as public services, hotels, golf courses, school districts, developers, and restaurants) (City of Oxnard, n.d.). The City’s website highlights water conservation and during a shortage event, would be consistently updated to reflect the most current information to help inform the community. Additionally, postcard notifications may be mailed directly to customers to explain current water restrictions and messages may be included with monthly water bills. A summary of actions the City could potentially take during a specific shortage stage is outlined in Table 5. 1432
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City of Oxnard 15 Water Shortage Contingency Plan – Public Draft Table 5. Communication and Outreach Actions by Shortage Stage.
COMMUNICATION ACTION STAGE 1 STAGE 2 STAGE 3 STAGE 4 STAGE 5 STAGE 6 Maintain public information and outreach focused
on long term, ongoing conservation actions (e.g.,
rebates on water saving appliances, repairing
leaks, and low water use landscaping).
X X X X X X
Initiate public information and advertising
campaign. X X
Utilize regional partnerships for messaging and
implementation. X X X X X
Focus messaging on shortage status and
immediate behavioral changes. X X
Develop and distribute specific drought or incident
information to customers. X X X X X
Special mailing/utility bill insert notifying of
shortage stage and copy of stage requirements. X X X X X Offer presentations to all local civic groups, HOAs
and neighborhood associations. Work with groups
to post City messaging/literature or links on
respective websites, social media, or meetings.
X X X X X
Further expand outreach efforts. X X X X
Modify messages to reflect more severe shortage
condition and need for immediate behavioral
changes.
X X X X
Update website with required percent demand
reduction information. X X X X
Open drought or shortage information center and
establish conservation hotline. X X X
Initiate water waste enforcement through
fines/patrols. X X X
Provide weekly updates on water shortage
emergency (media briefings, web update, local
newspaper, online ads, social media outlets).
Modify utility billing system and bill format to
accommodate residential rationing; add penalty
rates.
X X
Expand water waste patrols to 7 days a week. X X
Provide daily updates on water shortage
emergency (media briefings, web update, local
newspaper, online Ads, social media outlets).
X
Implement severe crisis communications plan and
campaign. X
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1.6 Compliance and Enforcement
The City’s Water Conservation staff is diligent in monitoring water waste and the City website encourages the public to report water waste activities. The Water Conservation staff proactively monitors consumption and responds to water waste reports.
Enforcement of water waste prohibitions and water shortage–stage restrictions is implemented under Oxnard City Code Chapter 22, including Articles VIII and IX, as amended. Enforcement authority was strengthened through ordinance amendments adopted during the 2022 drought emergency and includes administrative citations, fines, flow‑restricting devices, and discontinuation of water service, subject to due process pursuant to Chapter 22 (including Section 22‑140).
Chapter 22, Article VIII of the City’s Code (City of Oxnard, n.d.) pertains to water waste and outlines the prohibitions identified in this WSCP. Sections 22-136 and 22-137 define the consequences for customers that violate any of the restrictions implemented to reduce demands at any time and during a water shortage stage.
1.7 Legal Authorities
The City’s first water shortage stage procedures were established in 1991 by Ordinance No. 2246 but were later entirely repealed and restated by Ordinance No. 2729 in 2006. This ordinance established new water conservation and water shortage response procedures under Chapter 22, Article IX of the Oxnard City Code. Article IX, which is also titled the “City of Oxnard Water Conservation and Water Shortage Response Procedures,” was later amended with language of Ordinance No. 2810 in 2009, which also provided amendments to Articles VIII and X, on Water Waste and Recycled Water Use, respectively. Copies of Ordinances 2729, 2810 and 2826 are provided online at:
https://codelibrary.amlegal.com/codes/oxnard/latest/oxnard_ca/0-0-0-45641 Following 2021, the City adopted additional amendments to Chapter 22 during the 2022 drought emergency to update water waste restrictions and enforcement procedures and to align municipal enforcement authority with the Water Shortage Contingency Plan framework. The currently codified provisions of Chapter 22 should be consulted for the requirements in effect at the time of any water shortage declaration.
These amendments to City Code were deemed necessary to manage the City’s potable water supply and to avoid or minimize the effects of drought and water supply variations within the City. The ordinances establish permanent water conservation standards to maximize water use efficiency for non-shortage conditions and refines response actions implemented during water shortage conditions.
The conservation resulting from improved water use efficiency should help ensure a reliable and sustainable minimum supply of water for the public health, safety and welfare by maintaining local and imported water resources.
Article IX of the City’s Code provides the City Council with the legal authority to declare, by resolution, that water shortage conditions are present within the City and establish mandatory water conservation measures associated with the shortage conditions. These measures shall remain in effect until the City Council declares that water shortage conditions have eased and modified or eliminated shortage responses (City of Oxnard, n.d.).
The City Council adopts mandatory water conservation measures by resolution as needed to respond to statewide, regional, or local drought and water shortage conditions, including actions taken during the 2022–2023 drought period, to operationalize and implement the WSCP shortage stages and associated response actions.
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1.8 Financial Consequences of WSCP
The City’s water system is financially managed as an enterprise fund. The current water rate structure includes a fixed charge and a variable charge. Fixed charges are based on meter size and will not be impacted by reduced water sales. The variable charge will be impacted by reduced water consumption.
Oxnard currently “passes through” rate increases for water purchased from Calleguas and United.
Oxnard does not currently have a drought rate structure or surcharge in place but will evaluate all options during the next water rate process.
To offset financial impacts from mandated water conservation during shortage conditions, Oxnard will consider delaying capital improvement projects; however, delaying capital improvement projects is not ideal for long-term or severe revenue losses. If Oxnard decides to increase future water rates or implement penalty fees for overuse, such actions may be subject to the requirements of California Proposition 218 (Prop 218).
Prior to the 2012-2015 drought period, the City had reserve revenues capable of accommodating a 10 to 20 percent reduction in revenues, which were used in the 2012-2015 drought period to offset losses.
The financial impacts outlined in this section apply to all shortage stages.
1.9 Monitoring and Reporting
The water savings from implementation of the WSCP will be determined based on measurements of consumption from water meters and well production meters. Customer meters will be read every month in Stages 1 and 2 and will increase to weekly readings in Stages 3 – 6. Production meters will be read on a weekly basis for a general analysis.
The City is in the process of implementing Advanced Metering Infrastructure (AMI). These automated tools will enable the City to track consumption and meet efficiency goals more effectively.
1.10 WSCP Refinement Procedures
The WSCP is best prepared and implemented as an adaptive management plan. The City will use results obtained from their monitoring and reporting program to evaluate any needs for revisions.
Potential changes to the WSCP that would warrant an update include, but are not limited to, any changes to trigger conditions, changes to the shortage stage structure, changes to rate structures or development of water budgets, and/or changes to customer reduction actions.
Any prospective changes to the WSCP would need to be presented to the City Council for approval.
The City will hold a public hearing, obtain any comments and formally adopt the updated WSCP.
Notices for refinement and the public hearing date will be published in the local newspaper in advance of any public meetings.
1.11 Special Water Feature Distinction
The City evaluates special water features. The City expects to restrict water use to special decorative features starting in Stage 3 shortages. Special decorative features apply to items that use water for aesthetic purposes. Aesthetic purposes pertain to ornamental fountains, ponds, or other decorative features. If necessary, customers may use water for decorative features to sustain aquatic life. 1435
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1.12 Plan Adoption, Submittal, and Availability
The WSCP will be presented for adoption to the City Council at a public meeting. The City Council and members of the public may submit any comments prior to approval and adoption. The WSCP will be submitted to DWR at the same time as the 2025 Urban Water Management Plan.
The WSCP will be made available to all staff, customers, and any affected cities, counties, or other members of the public through the City’s website, located under the Water Conservation Department. 1436
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1.13 Resources and References
AECOM for the City of Oxnard Water Division. (January 2020). City of Oxnard Water Division Water System Emergency Response Plan. Oxnard: City of Oxnard.
AECOM for Ventura County. (2015). 2015 Ventura County Multi-Hazard Mitigation Plan. Ventura:
Ventura County.
Arlington County Government. (n.d.). Arlington, Virginia. Retrieved from Water & Utilities:
https://water.arlingtonva.us/environment/conserving-water/ California Department of Water Resources. (2021). Urban Water Management Plan Guidebook 2020.
Sacramento: California Department of Water Resources.
California Department of Water Resources. (2026). Urban Water Management Plan Guidebook 2025.
Sacramento: California Department of Water Resources.
California Water Efficiency Partnership. (2021). Jumpstart Water Shortage Toolkit Tool#1: Model Water Shortage Contingency Plans. Sacramento: California Water Efficiency Partnership.
City of Oxnard. (n.d.). Oxnard, California Codified Ordinances. Retrieved from American Legal Publishing Corporation: https://codelibrary.amlegal.com/codes/oxnard/latest/oxnard_ca/0-0-0- 84217
Maryland Department of the Environment. (n.d.). Water Conservation and Washing Vehicles. Retrieved 2021, from Water Conservation:
https://mde.maryland.gov/programs/water/waterconservation/pages/carwashing.aspx Southwest Florida Water Management District. (2018). Water Conservation in Restaurants. (Southwest Florida Water Management District) Retrieved March 2021, from Water Conservation:
https://www.swfwmd.state.fl.us/residents/water-conservation/water-conservation-restaurants Tetra Tech, County of Ventura, Ventura County Sheriff Emergency Services. (2022). Multi-Jurisdictional Hazard Mitigation Plan.
Texas Living Waters Project. (2018). Water Conservation by the Yard: A Statewide Analysis of Outdoor Water Savings Potential. Austin: Texas Living Waters Project, Sierra Club, National Wildlife Federation. Retrieved from Texas Living Waters Project.
United States Environmental Protection Agency. (2012). Saving Water in Restaurants. United States Environmental Protection Agency.
United States Environmental Protection Agency, Office of Water. (2002). Cases in Water Conservation:
How Efficiency Programs Help Water Utilities Save Water and Avoid Costs. United States Environmental Protection Agency.
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2025 Urban Water Management Plan- Draft | B
Appendix B Reduced Delta Reliance
B
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Appendix B. Demonstration
of Reduced Delta Reliance
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Appendix B. Demonstration of Reduced Delta Reliance
2 Quantifying Regional Self-Reliance and
Reduced Reliance on Water Supplies from
the Delta
1. Background
Under the Sacramento-San Joaquin Delta Reform Act of 2009, state and local public agencies proposing a covered action in the Delta, prior to initiating the implementation of that action, must prepare a written certification of consistency with detailed findings as to whether the covered action is consistent with applicable Delta Plan policies and submit that certification to the Delta Stewardship Council. Anyone may appeal a certification of consistency, and if the Delta Stewardship Council grants the appeal, the covered action may not be implemented until the agency proposing the covered action submits a revised certification of consistency, and either no appeal is filed, or the Delta Stewardship Council denies the subsequent appeal.
An urban water supplier that anticipates participating in or receiving water from a proposed covered action such as a multi-year water transfer, conveyance facility, or new diversion that involves transferring water through, exporting water from, or using water in the Delta should provide information in their Urban Water Management Plans (UWMPs) that can then be used in the covered action process to demonstrate consistency with Delta Plan Policy WR P1, Reduce Reliance on the Delta Through Improved Regional Water Self-Reliance (WR P1).
WR P1 details what is needed for a covered action to demonstrate consistency with reduced reliance on the Delta and improved regional self-reliance. WR P1 subsection (a) states that:
(a) Water shall not be exported from, transferred through, or used in the Delta if all the following apply:
(1) One or more water suppliers that would receive water as a result of the export, transfer, or use have failed to adequately contribute to reduced reliance on the Delta and improved regional self-reliance consistent with all of the requirements listed in paragraph (1) of subsection (c);
(2) That failure has significantly caused the need for the export, transfer, or use; and (3) The export, transfer, or use would have a significant adverse environmental impact in the Delta.
WR P1 subsection (c)(1) further defines what adequately contributing to reduced reliance on the Delta means in terms of (a)(1) above.
(c)(1) Water suppliers that have done all the following are contributing to reduced reliance on the Delta and improved regional self-reliance and are therefore consistent with this policy:
(A) Completed a current Urban or Agricultural Water Management Plan (Plan) which has been reviewed by the California Department of Water Resources for compliance with the applicable requirements of Water Code Division 6, Parts 2.55, 2.6, and 2.8; (B) Identified, evaluated, and commenced implementation, consistent with the implementation schedule set forth in the Plan, of all programs and projects included in the Plan that are locally cost effective and technically feasible which reduce reliance on the Delta; and
(C) Included in the Plan, commencing in 2015, the expected outcome for measurable reduction in Delta reliance and improvement in regional self-reliance. The expected 1440
Appendix B. Demonstration of Reduced Delta Reliance
3 outcome for measurable reduction in Delta reliance and improvement in regional selfreliance shall be reported in the Plan as the reduction in the amount of water used, or in the percentage of water used, from the Delta watershed. For the purposes of reporting, water efficiency is considered a new source of water supply, consistent with Water Code section 1011(a).
The analysis and documentation provided below include all the elements described in WR P1(c)(1) that need to be included in a water supplier’s UWMP to support a certification of consistency for a future covered action.
2. Demonstration of Regional Self-Reliance
The methodology used to determine the City of Oxnard’s (City) improved regional self-reliance is consistent with the approach detailed in DWR’s UWMP Guidebook Appendix C (Guidebook Appendix C), including the use of narrative justifications for the accounting of supplies and the documentation of specific data sources. Some of the key assumptions underlying the City’s demonstration of reduced reliance include:
• All data were obtained from the current 2025 UWMP or previously adopted UWMPs and represent average or normal water year conditions.
• All analyses were conducted at the service area level, and all data reflect the total contributions of the City and its customers.
• No projects or programs that solely use water from the Delta and are described in the UWMPs as “Projects Under Development” were included in the accounting of supplies. Future local supply projects are included in this analysis.
Baseline and Expected Outcomes
To calculate the expected outcomes for measurable reduction in Delta reliance and improved regional self-reliance, a baseline is needed to compare against. This analysis uses a normal water year representation of 2010 as the baseline, which is consistent with the approach described in the Guidebook Appendix C. Data for the 2010 baseline were taken from the City’s 2005 UWMP as UWMPs generally do not provide normal water year data for the year that they are adopted (i.e., 2005 UWMP forecasts begin in 2010, 2010 UWMP forecasts begin in 2015, and so on).
Consistent with the 2010 baseline data approach, the expected outcomes for reduced Delta reliance and improved regional self-reliance for 2015, 2020, and 2025 were taken from the City’s 2010, 2015, and 2020 UWMPs, respectively. Expected outcomes for 2030-2050 are from the current 2025 UWMP.
Documentation of the specific data sources and assumptions are included in the discussions below.
Service Area Demands without Water Use Efficiency
In alignment with the Guidebook Appendix C, this analysis uses normal water year demands, rather than normal water year supplies to calculate expected outcomes in terms of the percentage of water used. Normal water year demands serve as a proxy for the amount of supplies that would be used in a normal water year, which helps alleviate issues associated with how supply capability is presented to fulfill requirements of the UWMP Act versus how supplies might be accounted for to demonstrate consistency with WR P1.
Because WR P1 considers water use efficiency savings a source of water supply, water suppliers can calculate their embedded water use efficiency savings based on changes in forecasted per capita water use since the baseline. As explained in the Guidebook Appendix C, water use efficiency savings must be added back to the normal year demands to represent demands without water use efficiency savings accounted for; otherwise, the effect of water use efficiency savings on regional self-reliance would be overestimated. Table C-1 shows the results of this adjustment for the City. Supporting narratives and documentation for all the data shown in Table C-1 are provided below. 1441
Appendix B. Demonstration of Reduced Delta Reliance
4 Service Area Demands with Water Use Efficiency
The service area demands shown in Table C-1 represent the total water demands for the City’s service area. The demand data shown in Table C-1 were collected from the following sources:
• Baseline (2010): the City’s 2005 UWMP, Table 4-3
• 2015: the City’s 2010 UWMP, Table 2-16
• 2020: the City’s 2015 UWMP, Table 4-3
• 2025: the City’s 2020 UWMP, Table 4-5
• 2030-2050: the City’s 2025 UWMP, Table 4-7
Non-Potable Water Demands
Over the years, the City has developed and implemented the Groundwater Recharge Enhancement and Treatment (GREAT) Program to establish recycled water for indirect potable reuse and increase local supply reliability. The City owns and operates an advanced water purification facility (AWPF) with an initial capacity of 7,000 AFY and future planned expansions. Details on recycled water are discussed in Chapter 6 of the 2025 UWMP. The non-potable water demand data shown in Table C-1 represents recycled water demand estimates directly used by customers. Water supply from indirect potable reuse (IPR) are used to meet potable demands, and are counted under supplies contributing to regional self-reliance.
Non-potable water demand data was collected from the following sources:
• Baseline (2010): the City’s 2005 UWMP, Table 4-3
• 2015: the City’s 2010 UWMP, Table 2-15 (no non-potable water demand as all water is projected to be used for IPR)
• 2020: the City’s 2015 UWMP, Table 6-4, excluding IPR which is a potable supply • 2025: the City’s 2020 UWMP, Table 4-5 (no non-potable water demand as all water is projected to be used for IPR)
• 2030-2050: the City’s 2025 UWMP, Table 4-7 (no non-potable water demand as all water is projected to be used for IPR)
Potable Service Area Demands with Water Use Efficiency
The “Potable Service Area Demands with Water Use Efficiency” was calculated by subtracting the “Non-Potable Water Demands” from “Service Area Demands with Water Use Efficiency.” Service Area Population
The population data shown in Table C-1 were collected from the following sources:
• Baseline (2010): the City’s 2010 UWMP, Table 2-2
• 2015: the City’s 2015 UWMP, Table 3-1
• 2020: the City’s 2020 UWMP, Table 3-2
• 2025-2050: the City's 2025 UWMP, Table 3-2
Estimated Water Use Efficiency Since Baseline
The “Estimated Water Use Efficiency Since Baseline” was calculated using “Potable Service Area Demands with Water Use Efficiency” divided by “Service Area Population” and then comparing with 2010 Per Capita Water Use.
Service Area Water Demands without Water Use Efficiency In Table C-2, the “Service Area Demands with Water Use Efficiency” was added to the “Estimated Water Use Efficiency Since Baseline” to obtain the “Service Area Water Demands without Water Use Efficiency Accounted For”.
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5 Supplies Contributing to Regional Self-Reliance
For a covered action to demonstrate consistency with the Delta Plan, WR P1 subsection (c)(1)(C) states that water suppliers must report the expected outcomes for measurable improvement in regional self-reliance. Table C-3 shows expected outcomes for supplies contributing to regional self-reliance both in the amount and as a percentage. The numbers shown in Table C-3 represent efforts to improve regional self-reliance for the City’s service area and include the total contributions of the City and its customers. Supporting narratives and documentation for all the data shown in Table C-3 are provided below.
Water Use Efficiency
The water use efficiency information shown in Table C-3 is taken directly from Table C-2.
Water Recycling
The water recycling values shown in Table C-3 are taken directly from the non-potable water demands in Table C-1.
Advanced Water Technologies
The advanced water technology values shown in Table C-3 include projected supply from the City’s AWPF used for IPR. The values were collected from the following sources:
• Baseline (2010): No supplies included.
• 2015: the City’s 2010 UWMP, Table 2-15, shown as groundwater recharge • 2020: the City’s 2015 UWMP, Table 6-4, shown as groundwater recharge (IPR) • 2025: the City’s 2020 UWMP, Table 6-11, shown as ASR Recovered Local and Regional Water Supply and Storage Projects
The Local and Regional Water Supply and Storage Projects include local groundwater using the City’s groundwater supply, purchased groundwater from United Water Conservation District (UWCD), and groundwater pumped through sales of recycled water to agricultural users outside of the City’s service area (Recycled Water Pump Back Allocation). The values were collected from the following sources:
• Baseline (2010): the City’s 2010 UWMP, Table 3-1, shown as groundwater less brine losses. • 2015: the City’s 2010 UWMP, Table 3-1, shown as groundwater recharge less brine losses. • 2020: the City’s 2015 UWMP, Table 6-8, shown as groundwater and purchased water from UWCD
• 2025: the City’s 2020 UWMP, Table 6-11, shown as City groundwater, UWCD groundwater, and recycled water pumpback allocation.
• 2030-2050: the City’s 2025 UWMP, Table 6-11, shown as City groundwater, UWCD groundwater, and recycled water pumpback allocation.
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Appendix B. Demonstration of Reduced Delta Reliance
6 3. Infeasibility of Accounting Supplies from the Delta Watershed for Metropolitan’s Member Agencies and their Customers
Metropolitan’s service area, as a whole, reduces reliance on the Delta through investments in non-Delta water supplies, local water supplies, and regional and local demand management measures.
Consistent with Metropolitan’s 2025 Urban Water Management Plan (UWMP), reduced reliance on supplies from the Delta watershed is evaluated at the regional level through changes in regional selfreliance and total reliance on Delta supplies. Metropolitan’s member agencies coordinate reliance on the Delta through their membership in Metropolitan, a regional cooperative providing wholesale water service to its 26 member agencies. Accordingly, regional reliance on the Delta can only be measured regionally—not by individual Metropolitan member agencies and not by the customers of those member agencies.
Metropolitan’s member agencies, and those agencies’ customers, indirectly reduce reliance on the Delta through their collective efforts as a cooperative. Metropolitan’s member agencies do not control the amount of Delta water they receive from Metropolitan. Metropolitan manages a statewide integrated conveyance system consisting of its participation in the State Water Project (SWP), its Colorado River Aqueduct (CRA) including Colorado River water resources, programs and water exchanges, and its regional storage portfolio. Along with the SWP, CRA, storage programs, and Metropolitan’s conveyance and distribution facilities, demand management programs increase the future reliability of water resources for the region. In addition, demand management programs provide system-wide benefits by decreasing the demand for imported water, which helps to decrease the burden on the district’s infrastructure and reduce system costs, and free up conveyance capacity to the benefit of all member agencies.
Metropolitan’s costs are funded almost entirely from its service area, with the exception of grants and other assistance from government programs. Most of Metropolitan’s revenues are collected directly from its member agencies. Properties within Metropolitan’s service area pay a property tax that provided approximately 15 percent of the fiscal year 2024 annual budgeted revenues. The rest of Metropolitan’s costs are funded through rates and charges paid by Metropolitan’s member agencies for the wholesale services it provides to them.1 Thus, Metropolitan’s member agencies fund nearly all operations Metropolitan undertakes to reduce reliance on the Delta, including Colorado River Programs, storage facilities, Local Resources Programs and conservation programs within Metropolitan’s service area.
Because of the integrated nature of Metropolitan’s systems and operations, and the collective nature of Metropolitan’s regional efforts, it is infeasible to quantify each of Metropolitan’s member agencies’ individual reliance on the Delta. It is infeasible to attempt to segregate an entity and a system that were designed to work as an integrated regional cooperative. 1 A standby charge is collected from properties within the service areas of 22 of Metropolitan’s 26 member agencies, ranging from $5 to $15 per acre annually, or per parcel if smaller than an acre. Standby charges go towards those member agencies’ obligations to Metropolitan for the Readiness-to-Serve Charge. Standby charges represented approximately 2 percent of Metropolitan’s total revenues in Fiscal Year 2025/26. See Metropolitan Water District of Southern California, Water Standby Charge for Fiscal Year 2025/26, Board Materials (as presented May 13, 2025 and incorporated in subsequent budget materials, including November 2025 revision), and Metropolitan Water District of Southern California, Water Revenue Bonds Official Statement, Appendix A – “The Metropolitan Water District of Southern California.”
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7 In addition to the member agencies funding Metropolitan’s regional efforts, they also invest in their own local programs to reduce their reliance on any imported water. Moreover, the customers of those member agencies may also invest in their own local programs to reduce water demand. However, to the extent those efforts result in reduction of demands on Metropolitan, that reduction does not equate to a like reduction of reliance on the Delta. Demands on Metropolitan are not commensurate with demands on the Delta because most of Metropolitan’s member agencies receive blended resources from Metropolitan as determined by Metropolitan—not the individual member agency—and for most member agencies, the blend varies from month-to-month and year-to-year due to hydrology, operational constraints, use of storage and other factors.
Colorado River Programs
As a regional cooperative of member agencies, Metropolitan invests in programs to ensure the continued reliability and sustainability of Colorado River supplies. Metropolitan was established to obtain an allotment of Colorado River water, and its first mission was to construct and operate the CRA.
The CRA consists of five pumping plants, 450 miles of high voltage power lines, one electric substation, four regulating reservoirs, and 242 miles of aqueducts, siphons, canals, conduits and pipelines terminating at Lake Mathews in Riverside County. Metropolitan owns, operates, and manages the CRA.
Metropolitan is responsible for operating, maintaining, rehabilitating, and repairing the CRA, and is responsible for obtaining and scheduling energy resources adequate to power pumps at the CRA’s five pumping stations.
Colorado River supplies include Metropolitan’s basic Colorado River apportionment, along with supplies that result from existing and committed programs, including supplies from the Imperial Irrigation District (IID)-Metropolitan Conservation Program, the implementation of the Quantification Settlement Agreement (QSA) and related agreements, and the exchange agreement with San Diego County Water Authority (SDCWA). The QSA established the baseline water use for each of the agreement parties and facilitates the transfer of water from agricultural agencies to urban uses. Since the QSA, additional programs have been implemented to increase Metropolitan’s CRA supplies. These programs have continued to evolve in response to ongoing drought conditions in the Colorado River Basin and associated shortage and contingency actions. These include the PVID Land Management, Crop Rotation, and Water Supply Program, as well as the Lower Colorado River Water Supply Project. The 2007 Interim Guidelines provided for the coordinated operation of Lake Powell and Lake Mead, as well as the Intentionally Created Surplus (ICS) program that allows Metropolitan to store water in Lake Mead.
Storage Investments/Facilities
Surface and groundwater storage are critical elements of Southern California’s water resources strategy and help Metropolitan reduce its reliance on the Delta. Because California experiences dramatic swings in weather and hydrology, storage is important to regulate those swings and mitigate possible supply shortages. Surface and groundwater storage provide a means of storing water during normal and wet years for later use during dry years, when imported supplies are limited. The Metropolitan system, for purposes of meeting demands during times of shortage, regulating system flows, and ensuring system reliability in the event of a system outage, provides over 1,000,000 acrefeet of system storage capacity. Diamond Valley Lake provides 810,000 acre-feet of that storage 1445
Appendix B. Demonstration of Reduced Delta Reliance
8 capacity, effectively doubling Southern California’s previous surface water storage capacity. Other existing imported water storage available to the region consists of Metropolitan’s raw water reservoirs, a share of the SWP’s raw water reservoirs in and near the service area, and the portion of the groundwater basins used for conjunctive‐use storage.
Since the early twentieth century, DWR and Metropolitan have constructed surface water reservoirs to meet emergency, drought/seasonal, and regulatory water needs for Southern California. These reservoirs include Pyramid Lake, Castaic Lake, Elderberry Forebay, Silverwood Lake, Lake Perris, Lake Skinner, Lake Mathews, Live Oak Reservoir, Garvey Reservoir, Palos Verdes Reservoir, Orange County Reservoir, and Metropolitan’s Diamond Valley Lake (DVL).
Metropolitan’s Live Oak and Garvey Reservoirs serve exclusively as regulating facilities and have a combined capacity of approximately 4,100 AF. The remaining reservoirs are primarily used to meet emergency, drought, and seasonal demands, with a total gross storage capacity of 1,760,200 AF.
However, not all of this capacity is available to Metropolitan; accounting for dead storage and volumes allocated to other entities, Metropolitan’s effective storage capacity is approximately 1,665,200 AF.
Conjunctive use of the aquifers offers another important source of dry year supplies. Unused storage in Southern California groundwater basins can be used to optimize imported water supplies, and the development of groundwater storage projects allows effective management and regulation of the region’s major imported supplies from the Colorado River and SWP. Over the years, Metropolitan has implemented conjunctive use through various programs in the service area; Table 1 lists the groundwater conjunctive use programs active in the region.
Table 1: Contractual Conjunctive Groundwater Projects
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9 Metropolitan Demand Management Programs
Demand management costs are Metropolitan’s expenditures for funding local water resource development programs and water conservation programs. These Demand Management Programs incentivize the development of local water supplies and the conservation of water to reduce the need to import water to deliver to Metropolitan’s member agencies. These programs are implemented below the delivery points between Metropolitan’s and its member agencies’ distribution systems and, as such, do not add any water to Metropolitan’s supplies. Rather, the effect of these downstream programs is to produce a local supply of water for the local agencies and to reduce demands by member agencies for water imported through Metropolitan’s system. The following discussions outline how Metropolitan funds local resources and conservation programs for the benefit of all of its member agencies and the entire Metropolitan service area. Notably, the history of demand management by Metropolitan’s member agencies and the local agencies that purchase water from Metropolitan’s members has spanned more than four decades. The significant history of the programs is another reason it would be difficult to attempt to assign a portion of such funding to any one individual member agency.
Local Resources Programs
In 1982, Metropolitan began providing financial incentives to its member agencies to develop new local supplies to assist in meeting the region’s water needs. Because of Metropolitan’s regional distribution system, these programs benefit all member agencies regardless of project location because they help to increase regional water supply reliability, reduce demands for imported water supplies, decrease the burden on Metropolitan’s infrastructure, reduce system costs, and free up conveyance capacity to the benefit of all the agencies that rely on water from Metropolitan.
For example, the Groundwater Replenishment System (GWRS) operated by the Orange County Water District is the world’s largest water purification system for indirect potable reuse. It was funded, in part, by Metropolitan’s member agencies through the Local Resources Program. Annually, the GWRS produces approximately 130,000 acre-feet of reliable, locally controlled, drought-proof supply of highquality water to recharge the Orange County Groundwater Basin and protect it from seawater intrusion.
The GWRS is a premier example of a regional project that significantly reduced the need to utilize imported water for groundwater replenishment in Metropolitan’s service area, increasing regional and local supply reliability and reducing the region’s reliance on imported supplies, including supplies from the State Water Project.
Metropolitan’s local resource programs have evolved through the years to better assist Metropolitan’s member agencies in increasing local supply production. The following is a description and history of the local supply incentive programs.
Local Projects Program
In 1982, Metropolitan initiated the Local Projects Program (LPP), which provided funding to member agencies to facilitate the development of recycled water projects. Under this approach, Metropolitan contributed a negotiated up-front funding amount to help finance project capital costs. Participating member agencies were obligated to reimburse Metropolitan over time. In 1986, the LPP was revised, changing the up-front funding approach to an incentive-based approach. Metropolitan contributed an amount equal to the avoided State Water Project pumping costs for each acre-foot of recycled water delivered to end-use consumers. This funding incentive was based on the premise that local projects 1447
Appendix B. Demonstration of Reduced Delta Reliance
10 resulted in the reduction of water imported from the Delta and the associated pumping cost. The incentive amount varied from year to year depending on the actual variable power cost paid for State Water Project imports. In 1990, Metropolitan’s Board increased the LPP contribution to a fixed rate of $154 per acre-foot, which was calculated based on Metropolitan’s avoided capital and operational costs to convey, treat, and distribute water, and included considerations of reliability and service area demands.
Groundwater Recovery Program
The drought of the early 1990s sparked the need to develop additional local water resources, aside from recycled water, to meet regional demand and increase regional water supply reliability. In 1991, Metropolitan conducted the Brackish Groundwater Reclamation Study which determined that large amounts of degraded groundwater in the region were not being utilized. Subsequently, the Groundwater Recovery Program (GRP) was established to assist the recovery of otherwise unusable groundwater degraded by minerals and other contaminants, provide access to the storage assets of the degraded groundwater, and maintain the quality of groundwater resources by reducing the spread of degraded plumes.
Local Resources Program
In 1995, Metropolitan’s Board adopted the Local Resources Program (LRP), which combined the LPP and GRP into one program. The Board allowed for existing LPP agreements with a fixed incentive rate to convert to the sliding scale up to $250 per acre-foot, similar to GRP incentive terms. Those agreements that were converted to LRP are known as “LRP Conversions.” Competitive Local Projects Program
In 1998, the Competitive Local Resources Program (Competitive Program) was established. The Competitive Program encouraged the development of recycled water and recovered groundwater through a process that emphasized cost-efficiency to Metropolitan, timing new production according to regional need while minimizing program administration cost. Under the Competitive Program, agencies requested an incentive rate up to $250 per acre-foot of production over 25 years under a Request for Proposals (RFP) for the development of up to 53,000 acre-feet per year of new water recycling and groundwater recovery projects. In 2003, a second RFP was issued for the development of an additional 65,000 acre-feet of new recycled water and recovered groundwater projects through the LRP.
Seawater Desalination Program
Metropolitan established the Seawater Desalination Program (SDP) in 2001 to provide financial incentives to member agencies for the development of seawater desalination projects. In 2014, seawater desalination projects became eligible for funding under the LRP, and the SDP was ended. 2007 Local Resources Program
In 2006, a task force comprised of member agency representatives was formed to identify and recommend program improvements to the LRP. As a result of the task force process, the 2007 LRP was established with a goal of 174,000 acre-feet per year of additional local water resource development. The new program allowed for an open application process and eliminated the previous competitive process. This program offered sliding scale incentives of up to $250 per acre-foot, 1448
Appendix B. Demonstration of Reduced Delta Reliance
11 calculated annually based on a member agency’s actual local resource project costs exceeding Metropolitan’s prevailing water rate.
2014 Local Resources Program
A series of workgroup meetings with member agencies was held to identify the reasons why there was a lack of new LRP applications coming into the program. The main constraint identified by the member agencies was that the $250 per acre-foot was not providing enough of an incentive for developing new projects due to higher construction costs to meet water quality requirements and to develop the infrastructure to reach end-use consumers located further from treatment plants. As a result, in 2014, the Board authorized an increase in the maximum incentive amount, provided alternative payment structures, included onsite retrofit costs and reimbursable services as part of the LRP, and added eligibility for seawater desalination projects. The current LRP incentive payment options are structured as follows:
Option 1 – Sliding scale incentive up to $340/AF for a 25-year agreement term Option 2 – Sliding scale incentive up to $475/AF for a 15-year agreement term Option 3 – Fixed incentive up to $305/AF for a 25-year agreement term On-site Retrofit Programs
In 2014, Metropolitan’s Board also approved the On-site Retrofit Pilot Program which provided financial incentives to public or private entities toward the cost of small-scale improvements to their existing irrigation and industrial systems to allow connection to existing recycled water pipelines. The On-site Retrofit Pilot Program helped reduce recycled water retrofit costs to the end-use consumer which is a key constraint that limited recycled water LRP projects from reaching full production capacity. The program incentive was equal to the actual eligible costs of the on-site retrofit, or $975 per acre-foot of up-front cost, which equates to $195 per acre-foot for an estimated five years of water savings ($195/AF x 5 years) multiplied by the average annual water use in previous three years, whichever is less. The Pilot Program lasted two years and was successful in meeting its goal of accelerating the use of recycled water.
In 2016, Metropolitan’s Board authorized a permanent On-site Retrofit Program (ORP). This program encompassed lessons learned from the Pilot Program and feedback from member agencies to make the program more streamlined and improve its efficiency. With an annual budget of $3 million, as of fiscal year 2024/25 the program has funded 550 sites, replacing 15,360 acre-feet of potable water with recycled water per year.
Stormwater Pilot Programs
In 2019, Metropolitan’s Board authorized both the Stormwater for Direct Use Pilot Program and a Stormwater for Recharge Pilot Program to study the feasibility of reusing stormwater to help meet regional demands in Southern California. These pilot programs are intended to encourage the development, monitoring, and study of new and existing stormwater projects by providing financial incentives for their construction/retrofit and monitoring/reporting costs. These pilot programs will help evaluate the potential benefits delivered by stormwater capture projects and provide a basis for potential future funding approaches. Metropolitan’s Board authorized a total of $12.5 million for the stormwater pilot programs ($5 million for the District Use Pilot and $7.5 million for the Recharge Pilot). 1449
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12 Current Status and Results of Metropolitan’s Local Resource Programs Today, nearly one-half of the total recycled water and groundwater recovery production in the region has been developed with an incentive from one or more of Metropolitan’s local resource programs.
During fiscal year 2025, Metropolitan provided about $5 million for production of 40,000 acre-feet of recycled water for non-potable and indirect potable uses. Metropolitan provided about $8 million to support projects that produced about 53,000 acre-feet of recovered groundwater for municipal use.
Since 1982, Metropolitan has invested $771 million to fund 90 recycled water projects and 28 groundwater recovery projects that have produced a cumulative total of about 4.6 million acre-feet.
Conservation Programs
Metropolitan’s regional conservation programs and approaches have a long history. Decades ago, Metropolitan recognized that demand management at the consumer level would be an important part of balancing regional supplies and demands. Water conservation efforts were seen as a way to reduce the need for imported supplies and offset the need to transport or store additional water into or within the Metropolitan service area. The actual conservation of water takes place at the retail consumer level.
Regional conservation approaches have proven to be effective at reaching retail consumers throughout Metropolitan’s service area and successfully implementing water saving devices, programs and practices. Through the pooling of funding by Metropolitan’s member agencies, Metropolitan is able to engage in regional campaigns with wide-reaching impact. Regional investments in demand management programs, of which conservation is a key part along with local supply programs, benefit all member agencies regardless of project location. These programs help to increase regional water supply reliability, reduce demands for imported water supplies, decrease the burden on Metropolitan’s infrastructure, reduce system costs, and free up conveyance capacity to the benefit of all member agencies.
Incentive-Based Conservation Programs
Conservation Credits Program
In 1988, Metropolitan’s Board approved the Water Conservation Credits Program (Credits Program).
The Credits Program is similar in concept to the Local Projects Program (LPP). The purpose of the Credits Program is to encourage local water agencies to implement effective water conservation projects through the use of financial incentives. The Credits Program provides financial assistance for water conservation projects that reduce demands on Metropolitan’s imported water supplies and require Metropolitan’s assistance to be financially feasible.
Initially, the Credits Program provided 50 percent of a member agency’s program cost, up to a maximum of $75 per acre-foot of estimated water savings. The $75 Base Conservation Rate was established based Metropolitan’s avoided cost of pumping SWP supplies. The Base Conservation Rate has been revisited by Metropolitan’s Board and revised twice since 1988, from $75 to $154 per acrefoot in 1990 and from $154 to $195 per acre-foot in 2005.
Metropolitan’s Credits Program investment in fiscal year 2025 was $22 million. 1450
Appendix B. Demonstration of Reduced Delta Reliance
13 Member Agency Administered Program
Some member agencies also have unique programs within their service areas that provide local rebates that may differ from Metropolitan’s regional program. Metropolitan continues to support these local efforts through a member agency administered funding program that adheres to the same funding guidelines as the Credits Program. The Member Agency Administered Program allows member agencies to receive funding for local conservation efforts that supplement, but do not duplicate, the rebates offered through Metropolitan’s regional rebate program.
Water Savings Incentive Program
There are numerous commercial entities and industries within Metropolitan’s service area that pursue unique savings opportunities that do not fall within the general rebate programs that Metropolitan provides. In 2012, Metropolitan designed the Water Savings Incentive Program (WSIP) to target these unique commercial and industrial projects. In addition to rebates for devices, under this program, Metropolitan provides financial incentives to businesses and industries that created their own custom water efficiency projects. Qualifying custom projects can receive funding for permanent water efficiency changes that result in reduced potable demand.
Non-Incentive Conservation Programs
In addition to its incentive-based conservation programs, Metropolitan also undertakes additional efforts throughout its service area that help achieve water savings without the use of rebates. Metropolitan’s non-incentive conservation efforts include:
• residential and professional water efficient landscape training classes • water audits for large landscapes
• research, development and studies of new water saving technologies • advertising and outreach campaigns
• community outreach and education programs
• advocacy for legislation, codes, and standards that lead to increased water savings Current Status and Results of Metropolitan’s Conservation Programs Since 1990, Metropolitan has invested $976 million in conservation rebates that have resulted in a cumulative savings of 4.32 million acre-feet of water as of fiscal year 2025. These investments include $414 million in turf removal which resulted in 175 million square feet of lawn turf removed. During fiscal year 2025, 1.12 million acre-feet of water is estimated to have been conserved. This annual total includes Metropolitan’s Conservation Credits Program; code-based conservation achieved through Metropolitan-sponsored legislation; building plumbing codes and ordinances; reduced consumption resulting from changes in water pricing; and pre-1990 device retrofits.
Infeasibility of Accounting Regional Investments in Reduced Reliance Below the Regional Level
The accounting of regional investments that contribute to reduced reliance on supplies from the Delta watershed is straightforward to calculate and report at the regional aggregate level. However, any similar accounting is infeasible for the individual member agencies or their customers. As described 1451
Appendix B. Demonstration of Reduced Delta Reliance
14 above, the region (through Metropolitan) makes significant investments in projects, programs and other resources that reduce reliance on the Delta. In fact, all of Metropolitan’s investments in Colorado River supplies, groundwater and surface storage, local resources development and demand management measures that reduce reliance on the Delta are collectively funded by revenues generated from the member agencies through rates and charges.
Metropolitan’s revenues cannot be matched to the demands or supply production history of an individual agency, or consistently across the agencies within the service area. Each project or program funded by the region has a different online date, useful life, incentive rate and structure, and production schedule. It is infeasible to account for all these things over the life of each project or program and provide a nexus to each member agency’s contributions to Metropolitan’s revenue stream over time.
Accounting at the regional level allows for the incorporation of the local supplies and water use efficiency programs done by member agencies and their customers through both the regional programs and through their own specific local programs. As shown above, despite the infeasibility of accounting reduced Delta reliance below the regional level, Metropolitan’s member agencies and their customers have together made substantial contributions to the region’s reduced reliance.
References
https://mwdh2o.legistar.com/View.ashx?M=F&ID=14909541&GUID=74F23E74-C89B-4C8D-ACA8- 764CBA3DFA63
https://www-admin.mwdh2o.com/media/soibemtf/2026-annual-achievement-report.pdf https://d1q0afiq12ywwq.cloudfront.net/media/5ralzxit/public-review-draft-february-2026-uwmp.pdf https://mwdh2o.legistar.com/View.ashx?M=F&ID=10371591&GUID=1A060A60-2A18-4EA1-BB1B3624C07C4C61 1452
Appendix B. Demonstration of Reduced Delta Reliance
15 4. Summary of Expected Outcomes for Reduced Reliance on the Delta As stated in WR P1(c)(1)(C), the policy requires that UWMPs include expected outcomes for measurable reduction in Delta reliance and improved regional self- reliance. WR P1 further states that those outcomes shall be reported in the UWMP as the reduction in the amount of water used, or in the percentage of water used, from the Delta.
The expected outcomes for the City’s Delta reliance and regional self-reliance were developed using the approach and guidance described in 2025 UWMP Guidebook Appendix C issued in January 2026.
Regional Self-Reliance
The data used to demonstrate increased regional self-reliance in this analysis represent the total regional efforts of the City and its customers and was developed in conjunction with Calleguas and Metropolitan as part of the UWMP coordination process.
The following provides a summary of the near-term (2030) and long-term (2050) expected outcomes for the City’s regional self-reliance.
• Near-term (2030) – Normal water year regional self-reliance is expected to increase by almost 10,000 AFY from the 2010 baseline; this represents an increase of about 24 percent of 2030 normal water year retail demands (Table C-3).
• Long-term (2050) – Normal water year regional self-reliance is expected to increase by about 12,000 AFY from the 2010 baseline, this represents an increase of about 26 percent of 2050 normal water year retail demands (Table C-3).
The results show that the City is reducing reliance on the Delta and improving regional self-reliance.
Reduced Reliance on Supplies from the Delta Watershed
For reduced reliance on supplies from the Delta Watershed, the data used in this analysis represent the total regional efforts of Metropolitan, Calleguas, and their member agencies and customers (including the City), and were developed in conjunction with the City and other Metropolitan member agencies as part of the UWMP coordination process (as described in Section 5 of Metropolitan’s 2025 UWMP). In accordance with UWMP requirements, Metropolitan’s member agencies and their customers (many of them retail agencies) also report demands and supplies for their service areas in their respective UWMPs. The data reported by those agencies are not additive to the regional totals shown in Metropolitan’s UWMP, rather their reporting represents subtotals of the regional total and should be considered as such for the purposes of determining reduced reliance on the Delta.
While the demands that Metropolitan’s member agencies and their customers report in their UWMP’s are a good reflection of the demands in their respective service areas, they do not adequately represent each water suppliers’ individual contributions to reduced reliance on the Delta. To calculate and report their reliance on water supplies from the Delta watershed, water suppliers that receive water from the Delta through other regional or wholesale water suppliers would need to determine the amount of Delta water that they receive from the regional or wholesale supplier. Two specific pieces of information are needed to accomplish this, first is the quantity of demands on the regional or wholesale water supplier that accurately reflect a supplier’s contributions to reduced reliance on the Delta and second is the quantity of a supplier’s demands on the regional or wholesale water supplier that are met by supplies from the Delta watershed.
For water suppliers that make investments in regional projects or programs it may be infeasible to quantify their demands on the regional or wholesale water supplier in a way that accurately reflects their individual contributions to reduced reliance on the Delta. Due to the extensive, long-standing, and successful implementation of regional demand management and local resource incentive programs in Metropolitan’s service area, this infeasibility holds true for Metropolitan’s members as well as their 1453
Appendix B. Demonstration of Reduced Delta Reliance
16 customers. For Metropolitan’s service area, reduced reliance on supplies from the Delta watershed can only be accurately accounted for at the regional level.
The following provides a summary of the near-term (2030) and long-term (2050) expected outcomes for the reduced reliance on supplies from the Delta Watershed for Metropolitan:
• Near-term (2030) – Normal water year reliance on supplies from the Delta watershed decreased by 466,000 AF from the 2010 baseline, this represents a decrease of 6.5% of 2025 normal water year retail demands (Table C-4).
• Long-term (2050) – Normal water year reliance on supplies from the Delta watershed decreased by 537,000 AF from the 2010 baseline, this represents a decrease of just over 9.4% of 2045 normal water year retail demands (Table C-4).
The results show that as a region, Metropolitan and its members (including the City) as well as their customers are measurably reducing reliance on the Delta and improving regional self-reliance.
5. UWMP Implementation
In addition to the analysis and documentation described above, WR P1 subsection (c)(1)(B) requires that all programs and projects included in the UWMP that are locally cost-effective and technically feasible, which reduce reliance on the Delta, are identified, evaluated, and implemented consistent with the implementation schedule. WR P1 (c)(1)(B) states that:
(B) Identified, evaluated, and commenced implementation, consistent with the implementation schedule set forth in the Plan, of all programs and projects included in the Plan that are locally cost effective and technically feasible which reduce reliance on the Delta[.] In accordance with Water Code Section 10631(f), water suppliers must already include in their UWMP a detailed description of expected future projects and programs that they may implement to increase the amount of water supply available to them in normal and single-dry water years and for a period of drought lasting five consecutive years. The UWMP description must also identify specific projects, include a description of the increase in water supply that is expected to be available from each project, and include an estimate regarding the implementation timeline for each project or program.
Chapter 6 of the City’s 2020 UWMP summarizes the implementation plan and continued progress in developing a diversified water portfolio to meet the region’s water needs. 1454
Appendix B. Demonstration of Reduced Delta Reliance
17 Table C-1: Optional Calculation of Water Use Efficiency Table C-2: Calculation of Service Area Water Demands without Water Use Efficiency Service Area Water Use Efficiency Demands
(Acre-Feet) Baseline
(2010)
2015 2020 2025 2030 2035 2040
2045
2050
(Optional)
Service Area Water Demands with Water Use Efficiency Accounted For 35,250 41,829 39,664 34,819 27,024 26,732 26,268 26,212 26,613 Non-Potable Water Demands 650 - 4,675 - - - - - 0
Potable Service Area Demands with Water Use Efficiency Accounted For 34,600 41,829 34,989 34,819 27,024 26,732 26,268 26,212 26,613 Total Service Area Population Baseline
(2010)
2015 2020 2025 2030 2035 2040
2045 2050
(Optional)
Service Area Population 201,499 193,654 206,352 210,472 217,235 223,998 225,378 226,758 228,138 Water Use Efficiency Since Baseline
(Acre-Feet)
Baseline
(2010)
2015 2020 2025 2030 2035 2040
2045 2050
(Optional)
Per Capita Water Use (GPCD) 153 193 151 148 111 107 104 103 104 Change in Per Capita Water Use from Baseline (GPCD) 40 (2) (6) (42) (47) (49) (50) (49) Estimated Water Use Efficiency Since Baseline (8,576) 444 1,322 10,278 11,731 12,432 12,725 12,561 Total Service Area Water Demands
(Acre-Feet)
Baseline
(2010)
2015 2020 2025 2030 2035 2040
2045 2050
(Optional)
Service Area Water Demands with Water Use Efficiency Accounted For 35,250 41,829 39,664 34,819 27,024 26,732 26,268 26,212 26,613 Reported Water Use Efficiency or Estimated Water Use Efficiency Since Baseline - (8,576) 444 1,322 10,278 11,731 12,432 12,725 12,561 Service Area Water Demands without Water Use Efficiency Accounted For 35,250 33,253 40,108 36,141 37,302 38,463 38,700 38,937 39,174 1455 Appendix B. Demonstration of Reduced Delta Reliance
18 Table C-3: Calculation of Supplies Contributing to Regional Self-Reliance Water Supplies Contributing to Regional Self-Reliance
(Acre-Feet) Baseline
(2010)
2015 2020 2025 2030 2035 2040
2045
2050
(Optional)
Water Use Efficiency - (8,576) 444 1,322 10,278 11,731 12,432 12,725 12,561 Water Recycling 650 - 4,675 - - - - - -
Stormwater Capture and Use - - - - - - - - -
Advanced Water Technologies - 5,200 1,525 1,500 3,000 6,400 6,400 6,400 6,400 Conjunctive Use Projects
Local and Regional Water Supply and Storage Projects 17,040 19,092 13,619 16,772 14,349 12,095 10,790 10,790 10,790 Other Programs and Projects the Contribute to Regional Self-Reliance - - - - - - - - - Water Supplies Contributing to Regional Self-Reliance 17,690 15,716 20,263 19,594 27,627 30,226 29,623 29,916 29,752 Service Area Water Demands without Water Use Efficiency (Acre-Feet)
Baseline
(2010) 2015 2020 2025 2030 2035 2040 2045 2050
(Optional)
Service Area Water Demands without Water Use Efficiency Accounted For 35,250 33,253 40,108 36,141 37,302 38,463 38,700 38,937 39,174 Change in Regional Self Reliance
(Acre-Feet)
Baseline
(2010) 2015 2020 2025 2030 2035 2040 2045 2050 (Optional) Water Supplies Contributing to Regional Self-Reliance 17,690 15,716 20,263 19,594 27,627 30,226 29,623 29,916 29,752 Change in Water Supplies Contributing to Regional Self-Reliance (1,974) 2,573 1,904 9,937 12,536 11,933 12,226 12,062 Percent Change in Regional Self Reliance
(As Percent of Demand w/out WUE)
Baseline
(2010) 2015 2020 2025 2030 2035 2040 2045 2050
(Optional)
Percent of Water Supplies Contributing to Regional Self-Reliance 50.2% 47.3% 50.5% 54.2% 74.1% 78.6% 76.5% 76.8% 75.9% Change in Percent of Water Supplies Contributing to Regional Self-Reliance -2.9% 0.3% 4.0% 23.9% 28.4% 26.4% 26.6% 25.8% 1456 Appendix B. Demonstration of Reduced Delta Reliance
19 Table C-4: Calculation of Reliance on Water Supplies from the Delta Watershed Source: Metropolitan 2025 Draft UWMP, Appendix 10 - Metropolitan’s Reduced Delta Reliance Reporting (February 2026) 1457
City of Oxnard DWR Checklist
2025 Urban Water Management Plan- Draft | C
Appendix C DWR Checklist
C
1458
Retail
(x = required)
Wholesale
(x = required) Order 2025 Guidebook Location Water Code Section Summary as Applies to UWMP Subject Relevant Submittal Table 2025 UWMP Location x x 1 Chapter 1 10615 A plan shall describe and evaluate sources of supply, reasonable and practical efficient uses, reclamation and demand management activities. Introduction and overview n/a Section 1.3 x x 1 Chapter 1 10630.5
Each plan shall include a simple description of the Supplier’s plan including water availability, future requirements, a strategy for meeting needs, and other pertinent information. Additionally, a Supplier may also choose to include a simple description at the beginning of each chapter.
Plan preparation n/a Section 1.3 and Chapter Intros
x x 2.1 Section 2.1 10620(b) Every person that becomes a Supplier shall adopt UWMP within one year after it has become a Supplier. Plan preparation n/a n/a x n/a 2.5 Section 2.5 10644 Supplier shall report the Public Water Systems number, volume of delivered water, and number of connections that are included in this UWMP. Plan preparation 2-1 Section 2.1 & Appendix Gx x 2.5 Section 2.5 10644 Supplier shall report if this UWMP is an individual UWMP and whether the Supplier belongs to a regional UWMP or regional alliance. Plan preparation 2-2 Section 2.1x x 2.5 Section 2.5 10644 Supplier shall report whether the data is in fiscal or calendar years and the units of measure used for reporting water volumes. Plan preparation 2-3 Section 2.1x x 2.4 Section 2.4 10642 Provide supporting documentation that the Supplier has encouraged active involvement of diverse social, cultural, and economic elements of the population within the service area prior to and during the preparation of the plan and contingency plan.
Plan preparation n/a Section 2.2
x x 2.4 Section 2.4.2 10620(d)(3)
Coordinate the preparation of its plan with other appropriate agencies in the area, including other Suppliers that share a common source, water management agencies, and relevant public agencies, to the extent practicable.
Plan preparation n/a Section 2.2
x n/a 2.4 Section 2.4.1 10631(h) Retail Suppliers will include documentation that they have provided their Wholesale Supplier(s)—if any—with water use projections from that source. Plan preparation 2-4 R Section 2.2 n/a x 2.4 Section 2.4.1 10631(h)
Wholesale Suppliers will provide their Suppliers with identification and quantification of the existing and planned sources of water available from the Wholesale Supplier to the Supplier during various water year types.
Plan preparation 2-4 W n/a
x x 3 Chapter 3.0 10631(a) Describe the Supplier service area. System description n/a Chapter 3x x 3.3 Section 3.3 10631(a) Describe the climate of the Supplier’s service area. System description n/a Section 3.3x x 3.4 Section 3.4.1 10631(a) Provide the current and projected service area populations for 2030, 2035, 2040, 2045 and optionally 2050. System description 3-1 Section 3.4x x 3.4 Section 3.4.2 10631(a) Describe other social, economic, and demographic factors affecting the Supplier’s water management planning. System description n/a Section 3.4x x 3.5 Section 3.5 10631(a) Describe the land uses within the service area… include the current and projected land uses within the existing or anticipated service area affecting the Supplier’s water management planning. Describe the land uses within the service area.
System description and baselines n/a Section 3.5
x Optional 4.2 Sections 4.2.3 and 4.2.4 10631(d)(1) Quantify past, current, and projected water use, identifying the uses among water use sectors. System water use 4-1 and 4-2 Section 4.1 x Optional 4.3 Section 4.3.1 10631(d)(3)(A) Report the distribution system water loss for each of the five years preceding the plan update. System water use 4-5 Section 4.1.3x n/a 4.3 Section 4.3.2 10631(d)(3)(C) Retail Suppliers shall provide data to show the distribution loss standards were met. System water use 4-6 Section 4.1.3x n/a 4.2 Section 4.2.5.4 10631.1(a) Include projected water use needed for lower income housing projected in the service area of the Supplier. System water use 4-3 Section 4.1 x n/a 4.2 Section 4.2.5.3 10631(d)(4)(A) In projected water use, include estimates of water savings from adopted codes, plans, and other policies or laws. System water use 4-3 Section 4.1.4x n/a 4.2 Section 4.2.5.3 10631(d)(4)(B) Provide citations of codes, standards, ordinances, or plans used to make water use projections. System water use 4-3 Section 4.1.4x n/a 4.2 Section 4.2.5.3 10631(d)(4)(B)(ii) To the extent that a Supplier reports the information described in subparagraph (A), an urban water Supplier shall… 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.
System water use 4-3 Section 4.1.4
x x 4.2 Section 4.2.5.6 10635(b) Demands under climate change considerations must be included as part of the drought risk assessment. System water use n/a Section 4.2 n/a x 5.1 Section 5.1 10608.36 Wholesale Suppliers shall include an assessment of present and proposed future measures, programs, and policies to help their Retail Suppliers achieve targeted water use reductions. Baselines and targets n/a n/a x n/a 5.2 Section 5.2 10608.4
Retail Suppliers shall report on their compliance in meeting their water use targets. Reporting requirements will vary depending on whether the Supplier:- Was considered an urban retail water supplier in 2020,- Met its 2020 target in 2020, or- Was part of a merger or consolidation since 2020.Chapter 5 Subsections 5.2.1, 5.2.2, and 5.2.3 address each of these situations.
Baselines and targets 5-1 Section 5.1
x x 6.1 Section 6.1 10631(b)(2) When multiple sources of water supply are identified, describe the management of each supply in relationship to other identified supplies. System supplies n/a Section 6.1x x 6.1 Sections 6.1 and 6.2 10631(b)(1) Provide a discussion of anticipated supply availability under a normal, single dry year, and a drought lasting five years, as well as more frequent and severe periods of drought, including changes in supply due to climate change.
System supplies n/a Section 6.1
x x 6.2 Section 6.2.2 10631(b)(4)(C)
Indicate whether groundwater is an existing or planned source of water available to the Supplier. If groundwater is identified as an existing or planned source of water… (include) a detailed description and analysis of the location, amount and sufficiency of groundwater pumped by the Supplier for the past five years.
Water supplies and recycled water 6-1 Section 6.2.2
x x 6.2 Section 6.2.2 10631(b)(4)(A)
Indicate whether a groundwater sustainability plan or groundwater management plan has been adopted by the Supplier or if there is any other specific authorization for groundwater management. Include a copy of the plan or authorization.
System supplies n/a Section 6.2.2
x x 6.2 Section 6.2.2 10631(b)(4)(B) Describe the groundwater basin. System supplies n/a Section 6.2.2x x 6.2 Section 6.2.2 10631(b)(4)(B) Indicate if the basin has been adjudicated and include a copy of the court order or decree and a description of the amount of water the Supplier has the legal right to pump. System supplies n/a n/ax x 6.2 Section 6.2.2 10631(b)(4)(B) For unadjudicated basins… (include) information as to whether DWR has identified the basin as a high- or medium-priority basin in the most current official departmental bulletin… Water supplies and recycled water n/a Section 6.2.2 x x 6.2 Section 6.2.2 10631(b)(4)(B) For unadjudicated basins… describe efforts by the Supplier to coordinate with sustainability or groundwater agencies to achieve sustainable groundwater conditions. Water supplies and recycled water n/a Section 6.2.2x x 6.2 Section 6.2.2. 10631(b)(4)(C) If groundwater is identified as an existing or planned source of water… (include) a detailed description and analysis of the location, amount and sufficiency of groundwater pumped by the Supplier for the past five years.
System supplies n/a Section 6.2.2
x x 6.2 Section 6.2.2 10631(b)(4)(D) Provide a detailed description and analysis of the amount and location of groundwater that is projected to be pumped. System supplies 6-9 Section 6.2.2x x 6.1 Section 6.1 10631(b) Identify and quantify the existing and planned sources of water available for 2025, 2030, 2035, 2040, 2045 and optionally 2050. System supplies 6-8 and 6-9 Section 6.2.10 1459
x x 6.2 Section 6.2.7 10631(c) Describe the opportunities for exchanges or transfers of water on a short-term or long-term basis. System supplies n/a Section 6.2.9 x n/a 6.2 Section 6.2.5 10633(a) Describe the wastewater collection and treatment systems in the Supplier’s service area with quantified amount of collection and treatment and the disposal methods. System supplies (recycled water) 6-2 Section 6.2.7 x x 6.2 Section 6.2.5 10633(b) Describe the quantity of treated wastewater that meets recycled water standards, is being discharged, and is otherwise available for use in a recycled water project. System supplies (recycled water) 6-3 Section 6.2.7x x 6.2 Section 6.2.5 10633(c) Describe the recycled water currently being used in the Supplier's service area. System supplies (recycled water) 6-4 Section 6.2.7x x 6.2 Section 6.2.5 10633(d) Describe and quantify the potential uses of recycled water and provide a determination of the technical and economic feasibility of those uses. System supplies (recycled water) 6-4 Section 6.2.7x x 6.2 Section 6.2.5 10633(e) Describe the projected use of recycled water within the Supplier's service area at the end of 5, 10, 15, and 20 years, and describe the actual use of recycled water in comparison to uses previously projected.
System supplies (recycled water) 6-4 and 6-5 Section 6.2.7 x x 6.2 Section 6.2.5 10633(f) Describe the actions that 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. System supplies (recycled water) 6-6 Section 6.2.7x x 6.2 Section 6.2.5 10633(g) Provide a plan for optimizing the use of recycled water in the Supplier's service area. System supplies (recycled water) n/a Section 6.2.7x x 6.2 Section 6.2.6 10631(g) Describe desalinated water project opportunities for long-term supply. System supplies 6-7 Section 6.2.8x x 6.2 Section 6.2.10 10631(f) Describe the expected future water supply projects and programs that may be undertaken by the water Supplier to address water supply reliability in average, single-dry, and for a period of drought lasting five consecutive water years.
System supplies 6-7 Section 6.2.10
x x 6.3 Section 6.3 and Appendix O 10631.2(a) The UWMP must include energy information, as stated in the code, that a Supplier can readily obtain. System suppliers, energy intensity O-1A, O-1B, O-1C, and O-2 Section 6.3 x 7.1 Section 7.1 10634 Provide information on the quality of existing sources of water available to the Supplier and the manner in which water quality affects water management strategies and supply reliability. Water supply reliability assessment n/a Section 7.2x x 7.2 Section 7.2 10635(a) Service Reliability Assessment: Assess the water supply reliability during normal, dry, and a drought lasting five consecutive water years by comparing the total water supply sources available to the Supplier with the total projected water use over the next 20 years.
Water supply reliability assessment 7-2, 7-3, and 7-4 Section 7.2 x x 7.2 Section 7.2.3 10620(f) Describe water management tools and options to maximize resources and minimize the need to import water from other regions. Water supply reliability assessment n/a Section 7.2.4 x x 7.3 Section 7.3 10635(b) Provide a drought risk assessment as part of information considered in developing the demand management measures and water supply projects. Water supply reliability assessment n/a Section 7.3x x 7.3 Section 7.3 10635(b)(1) Include 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 years.
Water supply reliability assessment n/a Section 7.3.1
x x 7.3 Section 7.3 10635(b)(2) Include a determination of the reliability of each source of supply under a variety of water shortage conditions. Water supply reliability assessment n/a Section 7.2 x x 7.3 Section 7.3 10635(b)(3) Include a comparison of the total water supply sources available to the Supplier with the total projected water use for the drought period. Water supply reliability assessment 7-5 Section 7.3.1x x 7.3 Section 7.3 10635(b)(4) Include considerations of the historical drought hydrology, plausible changes on projected supplies and demands under climate change conditions, anticipated regulatory changes, and other locally applicable criteria.
Water supply reliability assessment n/a Section 7.2.1
x x 8 Chapter 8 10632(a) Provide a water shortage contingency plan (WSCP) with specified elements below. Water shortage contingency planning n/a Appendix A x x 8 Chapter 8 10632(a)(1) Provide an analysis of water supply reliability (from Guidebook Chapter 7) in the WSCP. Water shortage contingency planning n/a Appendix A Section 1.1x x 8.2 Section 8.2 10632(a)(2)(A) Provide the written decision-making process and other methods that the Supplier will use each year to determine its water reliability. Water shortage contingency planning n/a Appendix A Section 1.2x x 8.2 Section 8.2 10632(a)(2)(B) Provide data and methodology to evaluate the Supplier’s water reliability for the current year and one dry year pursuant to factors in the code. Water shortage contingency planning n/a Appendix A Section 1.2x x 8.3 Section 8.3 10632(a)(3)(A) Define six standard water shortage levels of 10%, 20%, 30%, 40%, 50% shortage, and greater than 50% shortage. These levels shall be based on supply conditions, including percent reductions in supply, changes in groundwater levels, changes in surface elevation, or other conditions. The shortage levels shall also apply to a catastrophic interruption of supply.
Water shortage contingency planning n/a Appendix A Section 1.3 x x 8.3 Section 8.3 10632(a)(3)(B) Suppliers with an existing WSCP that uses different water shortage levels must cross reference their categories with the six standard categories. Water shortage contingency planning 8-1 Appendix A Section 1.3 x x 8.4 Section 8.4 10632(a)(4)(A) Suppliers with WSCPs that align with the defined shortage levels must specify locally appropriate supply augmentation actions. Water shortage contingency planning 8-2 Appendix A Section 1.4.2x x 8.4 Section 8.4 10632(a)(4)(B) Specify locally appropriate demand reduction actions to adequately respond to shortages. Water shortage contingency planning 8-3 Appendix A Section 1.4.1x x 8.4 Section 8.4 10632(a)(4)(C) Specify locally appropriate operational changes. Water shortage contingency planning 8-2 Appendix A Section 1.4.3x x 8.4 Section 8.4 10632(a)(4)(D) Specify additional mandatory prohibitions against specific water use practices that are in addition to State-mandated prohibitions are appropriate to local conditions. Water shortage contingency planning Table 8-3 Appendix A Section 1.4.4x x 8.4 Section 8.4 10632(a)(4)(E) Estimate the extent to which the gap between supplies and demand will be reduced by implementation of the action. Water shortage contingency planning 8-2 and 8-3 Appendix A Section 1.4.1x x 8.4 Section 8.4.6 10632.5 The UWMP shall include a seismic risk assessment and mitigation plan. Water shortage contingency plan n/a Appendix A Section 1.4.6x x 8.5 Section 8.5 10632(a)(5)(A) Suppliers must describe that they will inform customers, the public and others regarding any current or predicted water shortages. Water shortage contingency planning n/a Appendix A Section 1.5x x 8.5 Section 8.5 10632(a)(5)(B), 10632(a)(5)(C) Suppliers must describe that they will inform customers, the public and others regarding any shortage response actions triggered or anticipated to be triggered and other relevant communications. Water shortage contingency planning n/a Appendix A Section 1.5 x n/a 8.6 Section 8.6 10632(a)(6) Retail Supplier must describe how it will ensure compliance with and enforce provisions of the WSCP. Water shortage contingency planning n/a Appendix A Section 1.6 x x 8.7 Section 8.7 10632(a)(7)(A) Describe the legal authority that empowers the Supplier to enforce shortage response actions. Water shortage contingency planning n/a Appendix A Section 1.7x x 8.7 Section 8.7 10632(a)(7)(B) Provide a statement that the Supplier will declare a water shortage emergency per Water Code Chapter 3. Water Shortage Emergencies . Water shortage contingency planning n/a Appendix A Section 1.7x x 8.7 Section 8.7 10632(a)(7)(C) Provide a statement that the Supplier will coordinate with any city or county within which it provides water for the possible proclamation of a local emergency. Water shortage contingency planning n/a Appendix A Section 1.5x x 8.8 Section 8.8 10632(a)(8)(A) Describe the potential revenue reductions and expense increases associated with activated shortage response actions. Water shortage contingency planning n/a Appendix A Section 1.8x x 8.8 Section 8.8 10632(a)(8)(B) Provide a description of mitigation actions needed to address revenue reductions and expense increases associated with activated shortage response actions. Water shortage contingency planning n/a Appendix A Section 1.8x n/a 8.8 Section 8.8 10632(a)(8)(C) Retail Suppliers must describe the cost of compliance with Water Code Chapter 3.3, Excessive Residential Water Use During Drought . Water shortage contingency planning n/a Appendix A Section 1.8 1460
x n/a 8.9 Section 8.9 10632(a)(9)
Retail Suppliers must describe the monitoring and reporting requirements and procedures that ensure appropriate data are collected, tracked, and analyzed for purposes of monitoring customer compliance.
Water shortage contingency planning n/a Appendix A Section 1.9 x x 8.10 Section 8.10 10632(a)(10) Describe reevaluation and improvement procedures for monitoring and evaluation the WSCP to ensure risk tolerance is adequate and appropriate water shortage mitigation strategies are implemented. Water shortage contingency planning n/a Appendix A Section 1.9 x n/a 8.11 Section 8.11 10632(b) Analyze and define water features that are artificially supplied with water, including ponds, lakes, waterfalls, and fountains, separately from swimming pools and spas. Water shortage contingency planning n/a Appendix A Section 1.11 x x 8.12 Section 8.12 10632(c) Make available the WSCP to customers and any city or county where it provides water within 30 days after adoption of the plan. Water shortage contingency planning n/a Appendix A Section 1.12x n/a 9.1 Sections 9.1 10631(e)(1) Retail Suppliers shall provide a description of the nature and extent of each demand management measure implemented over the past five years. The description will address specific measures listed in code.
Demand management measures n/a Section 9.2
n/a x 9.2 Sections 9.2 10631(e)(2) Wholesale Suppliers shall describe specific demand management measures listed in code, their distribution system asset management program, and Supplier assistance program. Demand management measures n/a Section 9.2 x n/a 10 Chapter 10 10608.26(a) Retail Suppliers shall conduct a public hearing to discuss adoption, implementation, and economic impact of water use targets (recommended to discuss compliance). Plan adoption, submittal, and implementation n/a Section 10.1 x x 10.2 Section 10.2.1 10621(b)
Notify, at least 60 days prior to the public hearing, any city or county within which the Supplier provides water that the Supplier will be reviewing the UWMP and considering amendments or changes to the plan.
Plan adoption, submittal, and implementation 10-1 Section 10.1 x x 10.4 Section 10.4 10621(f) Each urban water Supplier shall update and submit its 2025 plan to DWR by July 1, 202 6. Plan adoption, submittal, and implementation n/a Section 10.1 x x 10.2 Sections 10.2.2, 10.3, and 10.5 10642 Provide supporting documentation that the Supplier made the UWMP and WSCP available for public inspection, published notice of the public hearing, and held a public hearing about the UWMP and WSCP. Plan adoption, submittal, and implementation n/a Appendix E x x 10.2 Section 10.2.2 10642 The Supplier is to provide the time and place of the hearing to any city or county within which the Supplier provides water. Plan adoption, submittal, and implementation 10-1 Section 10.1, Appendix E x x 10.3 Section 10.3.2 10642 Provide supporting documentation that the UWMP and WSCP has been adopted as prepared or modified. Plan adoption, submittal, and implementation n/a Appendix Fx x 10.4 Section 10.4 10644(a) Provide supporting documentation that the Supplier has submitted their UWMP to the California State Library. Plan adoption, submittal, and implementation n/a Section 10.1x x 10.4 Section 10.4 10644(a)(1) Provide supporting documentation that the Supplier has submitted their UWMP to any city or county within which the Supplier provides water no later than 30 days after adoption. Plan adoption, submittal, and implementation n/a Section 10.1, Appendix Dx x 10.4 Sections 10.4.1 and 10.4.2 10644(a)(2) The UWMP, or amendments to the UWMP, submitted to DWR shall be submitted electronically. Plan adoption, submittal, and implementation n/a Section 10.1x x 10.7 Section 10.7.2 10644(b) If revised, submit a copy of the WSCP to DWR within 30 days of adoption. Plan adoption, submittal, and implementation n/a Section 10.1x x 10.5 Section 10.5 10645(a) Provide supporting documentation that, not later than 30 days after filing a copy of its UWMP with DWR, the Supplier has or will make the plan available for public review during normal business hours. Plan adoption, submittal, and implementation n/a Section 10.1 x x 10.5 Section 10.5 10645(b) Provide supporting documentation that, not later than 30 days after filing a copy of its WSCP with DWR, the Supplier has or will make the plan available for public review during normal business hours. Plan adoption, submittal, and implementation n/a Appendix A Section 1.12 x x 10.6 Section 10.6 10621(c) If Supplier is regulated by the Public Utilities Commission, include its plan and contingency plan as part of its general rate case filings. Plan adoption, submittal, and implementation n/a Section 10.1 1461
City of Oxnard Notification Letters and Outreach
2025 Urban Water Management Plan- Draft | D
Appendix D Notification Letters and
Outreach
D
1462
Maldonado, Abraham <[email protected]>
CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER
MANAGEMENT PLAN AND SHORTAGE CONTINGENCY PLAN
1 message
Maldonado, Abraham <[email protected]> Wed, Apr 1, 2026 at 9:38 AM To: [email protected]
Cc: Chris Peyton <[email protected]>
4/29/26, 11:48 AM City of Oxnard Mail - CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER MANAGEMENT PLAN AN… https://mail.google.com/mail/u/0/?ik=49c1a775dc&view=pt&search=all&permthid=thread-a:r-8143516392279292862%7Cmsg-a:r-6763432438146900… 1/2 1463
Dear Mr. Demers,
The City of Oxnard is in the process of preparing and updating its 2025 Urban Water Management Plan (UWMP) and Water Shortage Contingency Plan (WSCP) in compliance with the Urban Water Management Planning Act. An update of the City of Oxnard’s UWMP is required every five (5) years.
Water Code section 10621(b) requires an urban water supplier updating its UWMP and WSCP to notify cities and counties within its service area of the update at least sixty (60) days prior to holding a public hearing, thereby encouraging public involvement and agency coordination. This letter serves as the City of Oxnard‘s notice that it is preparing and updating its 2025 UWMP and WSCP.
A draft of the UWMP and WSCP will be made available prior to the public hearing at:
www.oxnard.gov/UWMP
The City of Oxnard anticipates holding a public hearing for adoption as follows:
Date: June 1, 2026
Time: 5:30 PM
Location: City of Oxnard Council Chambers, 305 West Third Street, Oxnard, CA 93030 The City invites your agency to coordinate and provide input during the preparation of these plans. If you have any questions or would like to provide input, please contact Abraham Maldonado by email at [email protected] or by phone at (805) 200-5375.
Thank you,
Chris Peyton
Division Manager
City of Oxnard
Abraham Maldonado - Water Resources Manager
Public Works Department | Water Division
251 South Hayes Avenue
Oxnard, California 93030
O: 805-200-5375 C: 805-228-2659
www.oxnard.gov
4/29/26, 11:48 AM City of Oxnard Mail - CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER MANAGEMENT PLAN AN… https://mail.google.com/mail/u/0/?ik=49c1a775dc&view=pt&search=all&permthid=thread-a:r-8143516392279292862%7Cmsg-a:r-6763432438146900… 2/2 1464
Maldonado, Abraham <[email protected]>
CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER
MANAGEMENT PLAN AND SHORTAGE CONTINGENCY PLAN
1 message
Maldonado, Abraham <[email protected]> Wed, Apr 1, 2026 at 9:38 AM To: [email protected]
Cc: Chris Peyton <[email protected]>
Dear Mr. Mullane,
The City of Oxnard is in the process of preparing and updating its 2025 Urban Water Management Plan (UWMP) and Water Shortage Contingency Plan (WSCP) in compliance with the Urban Water Management Planning Act. An update of the City of Oxnard’s UWMP is required every five (5) years.
Water Code section 10621(b) requires an urban water supplier updating its UWMP and WSCP to notify cities and counties within its service area of the update at least sixty (60) days prior to holding a public hearing, thereby encouraging public involvement and agency coordination. This letter serves as the City of Oxnard‘s notice that it is preparing and updating its 2025 UWMP and WSCP.
A draft of the UWMP and WSCP will be made available prior to the public hearing at:
www.oxnard.gov/UWMP
The City of Oxnard anticipates holding a public hearing for adoption as follows:
Date: June 1, 2026
Time: 5:30 PM
Location: City of Oxnard Council Chambers, 305 West Third Street, Oxnard, CA 93030 The City invites your agency to coordinate and provide input during the preparation of these plans. If you have any questions or would like to provide input, please contact Abraham Maldonado by email at [email protected] or by phone at (805) 200-5375.
Thank you,
Chris Peyton
Division Manager
City of Oxnard
Abraham Maldonado - Water Resources Manager
Public Works Department | Water Division
251 South Hayes Avenue
Oxnard, California 93030
O: 805-200-5375 C: 805-228-2659
www.oxnard.gov
4/29/26, 11:49 AM City of Oxnard Mail - CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER MANAGEMENT PLAN AN… https://mail.google.com/mail/u/0/?ik=49c1a775dc&view=pt&search=all&permthid=thread-a:r-6238443586870342703%7Cmsg-a:r-5623047962853384… 1/1 1465
Maldonado, Abraham <[email protected]>
CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER
MANAGEMENT PLAN AND SHORTAGE CONTINGENCY PLAN
1 message
Maldonado, Abraham <[email protected]> Wed, Apr 1, 2026 at 9:38 AM To: [email protected]
Cc: Chris Peyton <[email protected]>
4/29/26, 11:47 AM City of Oxnard Mail - CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER MANAGEMENT PLAN AN… https://mail.google.com/mail/u/0/?ik=49c1a775dc&view=pt&search=all&permthid=thread-a:r1634820390359656106%7Cmsg-a:r-74524710033654544… 1/2 1466
Dear Mr. Pettit,
The City of Oxnard is in the process of preparing and updating its 2025 Urban Water Management Plan (UWMP) and Water Shortage Contingency Plan (WSCP) in compliance with the Urban Water Management Planning Act. An update of the City of Oxnard’s UWMP is required every five (5) years.
Water Code section 10621(b) requires an urban water supplier updating its UWMP and WSCP to notify cities and counties within its service area of the update at least sixty (60) days prior to holding a public hearing, thereby encouraging public involvement and agency coordination. This letter serves as the City of Oxnard‘s notice that it is preparing and updating its 2025 UWMP and WSCP.
A draft of the UWMP and WSCP will be made available prior to the public hearing at:
www.oxnard.gov/UWMP
The City of Oxnard anticipates holding a public hearing for adoption as follows:
Date: June 1, 2026
Time: 5:30 PM
Location: City of Oxnard Council Chambers, 305 West Third Street, Oxnard, CA 93030 The City invites your agency to coordinate and provide input during the preparation of these plans. If you have any questions or would like to provide input, please contact Abraham Maldonado by email at [email protected] or by phone at (805) 200-5375.
Thank you,
Chris Peyton
Division Manager
City of Oxnard
Thank you,
Abraham Maldonado - Water Resources Manager
Public Works Department | Water Division
251 South Hayes Avenue
Oxnard, California 93030
O: 805-200-5375 C: 805-228-2659
www.oxnard.gov
4/29/26, 11:47 AM City of Oxnard Mail - CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER MANAGEMENT PLAN AN… https://mail.google.com/mail/u/0/?ik=49c1a775dc&view=pt&search=all&permthid=thread-a:r1634820390359656106%7Cmsg-a:r-74524710033654544… 2/2 1467
Maldonado, Abraham <[email protected]>
CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER
MANAGEMENT PLAN AND SHORTAGE CONTINGENCY PLAN
1 message
Maldonado, Abraham <[email protected]> Wed, Apr 1, 2026 at 9:38 AM To: "Ozdy, Andrea" <[email protected]>
Cc: Chris Peyton <[email protected]>
Dear Ms. Ozdy,
The City of Oxnard is in the process of preparing and updating its 2025 Urban Water Management Plan (UWMP) and Water Shortage Contingency Plan (WSCP) in compliance with the Urban Water Management Planning Act. An update of the City of Oxnard’s UWMP is required every five (5) years.
Water Code section 10621(b) requires an urban water supplier updating its UWMP and WSCP to notify cities and counties within its service area of the update at least sixty (60) days prior to holding a public hearing, thereby encouraging public involvement and agency coordination. This letter serves as the City of Oxnard‘s notice that it is preparing and updating its 2025 UWMP and WSCP.
A draft of the UWMP and WSCP will be made available prior to the public hearing at:
www.oxnard.gov/UWMP
The City of Oxnard anticipates holding a public hearing for adoption as follows:
Date: June 1, 2026
Time: 5:30 PM
Location: City of Oxnard Council Chambers, 305 West Third Street, Oxnard, CA 93030 The City invites your agency to coordinate and provide input during the preparation of these plans. If you have any questions or would like to provide input, please contact Abraham Maldonado by email at [email protected] or by phone at (805) 200-5375.
Thank you,
Chris Peyton
Division Manager
City of Oxnard
Abraham Maldonado - Water Resources Manager
Public Works Department | Water Division
251 South Hayes Avenue
Oxnard, California 93030
O: 805-200-5375 C: 805-228-2659
www.oxnard.gov
4/29/26, 11:50 AM City of Oxnard Mail - CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER MANAGEMENT PLAN AN… https://mail.google.com/mail/u/0/?ik=49c1a775dc&view=pt&search=all&permthid=thread-a:r-8190636448497587%7Cmsg-a:r-234925924536108654&… 1/1 1468
Maldonado, Abraham <[email protected]>
CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER
MANAGEMENT PLAN AND SHORTAGE CONTINGENCY PLAN
1 message
Maldonado, Abraham <[email protected]> Wed, Apr 1, 2026 at 9:38 AM To: [email protected]
Cc: Chris Peyton <[email protected]>
Dear Ms. Nance,
The City of Oxnard is in the process of preparing and updating its 2025 Urban Water Management Plan (UWMP) and Water Shortage Contingency Plan (WSCP) in compliance with the Urban Water Management Planning Act. An update of the City of Oxnard’s UWMP is required every five (5) years.
Water Code section 10621(b) requires an urban water supplier updating its UWMP and WSCP to notify cities and counties within its service area of the update at least sixty (60) days prior to holding a public hearing, thereby encouraging public involvement and agency coordination. This letter serves as the City of Oxnard‘s notice that it is preparing and updating its 2025 UWMP and WSCP.
A draft of the UWMP and WSCP will be made available prior to the public hearing at:
www.oxnard.gov/UWMP
The City of Oxnard anticipates holding a public hearing for adoption as follows:
Date: June 1, 2026
Time: 5:30 PM
Location: City of Oxnard Council Chambers, 305 West Third Street, Oxnard, CA 93030 The City invites your agency to coordinate and provide input during the preparation of these plans. If you have any questions or would like to provide input, please contact Abraham Maldonado by email at [email protected] or by phone at (805) 200-5375.
Thank you,
Chris Peyton
Division Manager
City of Oxnard
Abraham Maldonado - Water Resources Manager
Public Works Department | Water Division
251 South Hayes Avenue
Oxnard, California 93030
O: 805-200-5375 C: 805-228-2659
www.oxnard.gov
4/29/26, 11:50 AM City of Oxnard Mail - CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER MANAGEMENT PLAN AN… https://mail.google.com/mail/u/0/?ik=49c1a775dc&view=pt&search=all&permthid=thread-a:r8834563047487563903%7Cmsg-a:r-78709999392407261… 1/1 1469
Maldonado, Abraham <[email protected]>
CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER
MANAGEMENT PLAN AND SHORTAGE CONTINGENCY PLAN
1 message
Maldonado, Abraham <[email protected]> Wed, Apr 1, 2026 at 9:38 AM To: kmccaffrey <[email protected]>
Cc: Chris Peyton <[email protected]>
Dear Ms. McCaffrey,
The City of Oxnard is in the process of preparing and updating its 2025 Urban Water Management Plan (UWMP) and Water Shortage Contingency Plan (WSCP) in compliance with the Urban Water Management Planning Act. An update of the City of Oxnard’s UWMP is required every five (5) years.
Water Code section 10621(b) requires an urban water supplier updating its UWMP and WSCP to notify cities and counties within its service area of the update at least sixty (60) days prior to holding a public hearing, thereby encouraging public involvement and agency coordination. This letter serves as the City of Oxnard‘s notice that it is preparing and updating its 2025 UWMP and WSCP.
A draft of the UWMP and WSCP will be made available prior to the public hearing at:
www.oxnard.gov/UWMP
The City of Oxnard anticipates holding a public hearing for adoption as follows:
Date: June 1, 2026
Time: 5:30 PM
Location: City of Oxnard Council Chambers, 305 West Third Street, Oxnard, CA 93030 The City invites your agency to coordinate and provide input during the preparation of these plans. If you have any questions or would like to provide input, please contact Abraham Maldonado by email at [email protected] or by phone at (805) 200-5375.
Thank you,
Chris Peyton
Division Manager
City of Oxnard
Abraham Maldonado - Water Resources Manager
Public Works Department | Water Division
251 South Hayes Avenue
Oxnard, California 93030
O: 805-200-5375 C: 805-228-2659
www.oxnard.gov
4/29/26, 11:45 AM City of Oxnard Mail - CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER MANAGEMENT PLAN AN… https://mail.google.com/mail/u/0/?ik=49c1a775dc&view=pt&search=all&permthid=thread-a:r-7698605115891060625%7Cmsg-a:r18620906991440627… 1/2 1470
4/29/26, 11:45 AM City of Oxnard Mail - CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER MANAGEMENT PLAN AN… https://mail.google.com/mail/u/0/?ik=49c1a775dc&view=pt&search=all&permthid=thread-a:r-7698605115891060625%7Cmsg-a:r18620906991440627… 2/2 1471
Maldonado, Abraham <[email protected]>
CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER
MANAGEMENT PLAN AND SHORTAGE CONTINGENCY PLAN
1 message
Maldonado, Abraham <[email protected]> Wed, Apr 1, 2026 at 9:38 AM To: [email protected]
Cc: Chris Peyton <[email protected]>
Dear Ms. Dorrington,
The City of Oxnard is in the process of preparing and updating its 2025 Urban Water Management Plan (UWMP) and Water Shortage Contingency Plan (WSCP) in compliance with the Urban Water Management Planning Act. An update of the City of Oxnard’s UWMP is required every five (5) years.
Water Code section 10621(b) requires an urban water supplier updating its UWMP and WSCP to notify cities and counties within its service area of the update at least sixty (60) days prior to holding a public hearing, thereby encouraging public involvement and agency coordination. This letter serves as the City of Oxnard‘s notice that it is preparing and updating its 2025 UWMP and WSCP.
A draft of the UWMP and WSCP will be made available prior to the public hearing at:
www.oxnard.gov/UWMP
The City of Oxnard anticipates holding a public hearing for adoption as follows:
Date: June 1, 2026
Time: 5:30 PM
Location: City of Oxnard Council Chambers, 305 West Third Street, Oxnard, CA 93030 The City invites your agency to coordinate and provide input during the preparation of these plans. If you have any questions or would like to provide input, please contact Abraham Maldonado by email at [email protected] or by phone at (805) 200-5375.
Thank you,
Chris Peyton
Division Manager
City of Oxnard
Abraham Maldonado - Water Resources Manager
Public Works Department | Water Division
251 South Hayes Avenue
Oxnard, California 93030
O: 805-200-5375 C: 805-228-2659
www.oxnard.gov
4/29/26, 11:48 AM City of Oxnard Mail - CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER MANAGEMENT PLAN AN… https://mail.google.com/mail/u/0/?ik=49c1a775dc&view=pt&search=all&permthid=thread-a:r1630920721713235938%7Cmsg-a:r360982030025560906… 1/1 1472
Maldonado, Abraham <[email protected]>
CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER
MANAGEMENT PLAN AND SHORTAGE CONTINGENCY PLAN
1 message
Maldonado, Abraham <[email protected]> Wed, Apr 1, 2026 at 9:41 AM To: [email protected]
Dear Mr. Deshmukh,
City of Oxnard is in the process of preparing and updating its 2025 Urban Water Management Plan (UWMP) and Water Shortage Contingency Plan (WSCP) in compliance with the Urban Water Management Planning Act. An update of the City of Oxnard’s UWMP is required every five (5) years.
Water Code section 10621(b) requires an urban water supplier updating its UWMP and WSCP to notify cities and counties within its service area of the update at least sixty (60) days prior to holding a public hearing, thereby encouraging public involvement and agency coordination. This letter serves as the City of Oxnard‘s notice that it is preparing and updating its 2025 UWMP and WSCP.
A draft of the UWMP and WSCP will be made available prior to the public hearing at:
www.oxnard.gov/UWMP
The City of Oxnard anticipates holding a public hearing for adoption as follows:
Date: June 1, 2026
Time: 5:30 PM
Location: City of Oxnard Council Chambers, 305 West Third Street, Oxnard, CA 93030 The City invites your agency to coordinate and provide input during the preparation of these plans. If you have any questions or would like to provide input, please contact Abraham Maldonado by email at [email protected] or by phone at (805) 200-5375.
Thank you,
Chris Peyton
Division Manager
City of Oxnard
Abraham Maldonado - Water Resources Manager
Public Works Department | Water Division
251 South Hayes Avenue
Oxnard, California 93030
O: 805-200-5375 C: 805-228-2659
www.oxnard.gov
4/29/26, 11:42 AM City of Oxnard Mail - CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER MANAGEMENT PLAN AN… https://mail.google.com/mail/u/0/?ik=49c1a775dc&view=pt&search=all&permthid=thread-a:r3595411854083033501%7Cmsg-a:r-45755363911303041… 1/1 1473
Maldonado, Abraham <[email protected]>
CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER
MANAGEMENT PLAN AND SHORTAGE CONTINGENCY PLAN
1 message
Maldonado, Abraham <[email protected]> Wed, Apr 1, 2026 at 9:38 AM To: [email protected]
Cc: Chris Peyton <[email protected]>
Dear Mr. Klotzle,
The City of Oxnard is in the process of preparing and updating its 2025 Urban Water Management Plan (UWMP) and Water Shortage Contingency Plan (WSCP) in compliance with the Urban Water Management Planning Act. An update of the City of Oxnard’s UWMP is required every five (5) years.
Water Code section 10621(b) requires an urban water supplier updating its UWMP and WSCP to notify cities and counties within its service area of the update at least sixty (60) days prior to holding a public hearing, thereby encouraging public involvement and agency coordination. This letter serves as the City of Oxnard‘s notice that it is preparing and updating its 2025 UWMP and WSCP.
A draft of the UWMP and WSCP will be made available prior to the public hearing at:
www.oxnard.gov/UWMP
The City of Oxnard anticipates holding a public hearing for adoption as follows:
Date: June 1, 2026
Time: 5:30 PM
Location: City of Oxnard Council Chambers, 305 West Third Street, Oxnard, CA 93030 The City invites your agency to coordinate and provide input during the preparation of these plans. If you have any questions or would like to provide input, please contact Abraham Maldonado by email at [email protected] or by phone at (805) 200-5375.
Thank you,
Chris Peyton
Division Manager
City of Oxnard
Abraham Maldonado - Water Resources Manager
Public Works Department | Water Division
251 South Hayes Avenue
Oxnard, California 93030
O: 805-200-5375 C: 805-228-2659
www.oxnard.gov
4/29/26, 11:49 AM City of Oxnard Mail - CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER MANAGEMENT PLAN AN… https://mail.google.com/mail/u/0/?ik=49c1a775dc&view=pt&search=all&permthid=thread-a:r9126316704778376884%7Cmsg-a:r-11803217459779766… 1/1 1474
Maldonado, Abraham <[email protected]>
CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER
MANAGEMENT PLAN AND SHORTAGE CONTINGENCY PLAN
1 message
Maldonado, Abraham <[email protected]> Wed, Apr 1, 2026 at 9:38 AM To: [email protected]
Cc: Chris Peyton <[email protected]>
Dear Mr. Camarillo,
The City of Oxnard is in the process of preparing and updating its 2025 Urban Water Management Plan (UWMP) and Water Shortage Contingency Plan (WSCP) in compliance with the Urban Water Management Planning Act. An update of the City of Oxnard’s UWMP is required every five (5) years.
Water Code section 10621(b) requires an urban water supplier updating its UWMP and WSCP to notify cities and counties within its service area of the update at least sixty (60) days prior to holding a public hearing, thereby encouraging public involvement and agency coordination. This letter serves as the City of Oxnard‘s notice that it is preparing and updating its 2025 UWMP and WSCP.
A draft of the UWMP and WSCP will be made available prior to the public hearing at:
www.oxnard.gov/UWMP
The City of Oxnard anticipates holding a public hearing for adoption as follows:
Date: June 1, 2026
Time: 5:30 PM
Location: City of Oxnard Council Chambers, 305 West Third Street, Oxnard, CA 93030 The City invites your agency to coordinate and provide input during the preparation of these plans. If you have any questions or would like to provide input, please contact Abraham Maldonado by email at [email protected] or by phone at (805) 200-5375.
Thank you,
Chris Peyton
Division Manager
City of Oxnard
Abraham Maldonado - Water Resources Manager
Public Works Department | Water Division
251 South Hayes Avenue
Oxnard, California 93030
O: 805-200-5375 C: 805-228-2659
www.oxnard.gov
4/29/26, 11:47 AM City of Oxnard Mail - CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER MANAGEMENT PLAN AN… https://mail.google.com/mail/u/0/?ik=49c1a775dc&view=pt&search=all&permthid=thread-a:r1247897700026943436%7Cmsg-a:r-77318239576464578… 1/1 1475
Maldonado, Abraham <[email protected]>
CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER
MANAGEMENT PLAN AND SHORTAGE CONTINGENCY PLAN
1 message
Maldonado, Abraham <[email protected]> Wed, Apr 1, 2026 at 9:38 AM To: [email protected]
Cc: Chris Peyton <[email protected]>
Dear Captain Brown,
The City of Oxnard is in the process of preparing and updating its 2025 Urban Water Management Plan (UWMP) and Water Shortage Contingency Plan (WSCP) in compliance with the Urban Water Management Planning Act. An update of the City of Oxnard’s UWMP is required every five (5) years.
Water Code section 10621(b) requires an urban water supplier updating its UWMP and WSCP to notify cities and counties within its service area of the update at least sixty (60) days prior to holding a public hearing, thereby encouraging public involvement and agency coordination. This letter serves as the City of Oxnard‘s notice that it is preparing and updating its 2025 UWMP and WSCP.
A draft of the UWMP and WSCP will be made available prior to the public hearing at:
www.oxnard.gov/UWMP
The City of Oxnard anticipates holding a public hearing for adoption as follows:
Date: June 1, 2026
Time: 5:30 PM
Location: City of Oxnard Council Chambers, 305 West Third Street, Oxnard, CA 93030 The City invites your agency to coordinate and provide input during the preparation of these plans. If you have any questions or would like to provide input, please contact Abraham Maldonado by email at [email protected] or by phone at (805) 200-5375.
Thank you,
Chris Peyton
Division Manager
City of Oxnard
Abraham Maldonado - Water Resources Manager
Public Works Department | Water Division
251 South Hayes Avenue
Oxnard, California 93030
O: 805-200-5375 C: 805-228-2659
www.oxnard.gov
4/29/26, 11:51 AM City of Oxnard Mail - CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER MANAGEMENT PLAN AN… https://mail.google.com/mail/u/0/?ik=49c1a775dc&view=pt&search=all&permthid=thread-a:r1608049369930177041%7Cmsg-a:r107057897710954743… 1/1 1476
Maldonado, Abraham <[email protected]>
CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER
MANAGEMENT PLAN AND SHORTAGE CONTINGENCY PLAN
1 message
Maldonado, Abraham <[email protected]> Wed, Apr 1, 2026 at 9:38 AM To: [email protected]
Cc: Chris Peyton <[email protected]>
4/29/26, 11:46 AM City of Oxnard Mail - CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER MANAGEMENT PLAN AN… https://mail.google.com/mail/u/0/?ik=49c1a775dc&view=pt&search=all&permthid=thread-a:r-838734932408227014%7Cmsg-a:r545973333883494627… 1/2 1477
Dear Mr. Martinez,
The City of Oxnard is in the process of preparing and updating its 2025 Urban Water Management Plan (UWMP) and Water Shortage Contingency Plan (WSCP) in compliance with the Urban Water Management Planning Act. An update of the City of Oxnard’s UWMP is required every five (5) years.
Water Code section 10621(b) requires an urban water supplier updating its UWMP and WSCP to notify cities and counties within its service area of the update at least sixty (60) days prior to holding a public hearing, thereby encouraging public involvement and agency coordination. This letter serves as the City of Oxnard‘s notice that it is preparing and updating its 2025 UWMP and WSCP.
A draft of the UWMP and WSCP will be made available prior to the public hearing at:
www.oxnard.gov/UWMP
The City of Oxnard anticipates holding a public hearing for adoption as follows:
Date: June 1, 2026
Time: 5:30 PM
Location: City of Oxnard Council Chambers, 305 West Third Street, Oxnard, CA 93030 The City invites your agency to coordinate and provide input during the preparation of these plans. If you have any questions or would like to provide input, please contact Abraham Maldonado by email at [email protected] or by phone at (805) 200-5375.
Thank you,
Chris Peyton
Division Manager
City of Oxnard
Abraham Maldonado - Water Resources Manager
Public Works Department | Water Division
251 South Hayes Avenue
Oxnard, California 93030
O: 805-200-5375 C: 805-228-2659
www.oxnard.gov
4/29/26, 11:46 AM City of Oxnard Mail - CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER MANAGEMENT PLAN AN… https://mail.google.com/mail/u/0/?ik=49c1a775dc&view=pt&search=all&permthid=thread-a:r-838734932408227014%7Cmsg-a:r545973333883494627… 2/2 1478
Maldonado, Abraham <[email protected]>
CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER
MANAGEMENT PLAN AND SHORTAGE CONTINGENCY PLAN
1 message
Maldonado, Abraham <[email protected]> Wed, Apr 1, 2026 at 9:38 AM To: [email protected]
Cc: Chris Peyton <[email protected]>
Dear Mr. Guardado,
The City of Oxnard is in the process of preparing and updating its 2025 Urban Water Management Plan (UWMP) and Water Shortage Contingency Plan (WSCP) in compliance with the Urban Water Management Planning Act. An update of the City of Oxnard’s UWMP is required every five (5) years.
Water Code section 10621(b) requires an urban water supplier updating its UWMP and WSCP to notify cities and counties within its service area of the update at least sixty (60) days prior to holding a public hearing, thereby encouraging public involvement and agency coordination. This letter serves as the City of Oxnard‘s notice that it is preparing and updating its 2025 UWMP and WSCP.
A draft of the UWMP and WSCP will be made available prior to the public hearing at:
www.oxnard.gov/UWMP
The City of Oxnard anticipates holding a public hearing for adoption as follows:
Date: June 1, 2026
Time: 5:30 PM
Location: City of Oxnard Council Chambers, 305 West Third Street, Oxnard, CA 93030 The City invites your agency to coordinate and provide input during the preparation of these plans. If you have any questions or would like to provide input, please contact Abraham Maldonado by email at [email protected] or by phone at (805) 200-5375.
Thank you,
Chris Peyton
Division Manager
City of Oxnard
Abraham Maldonado - Water Resources Manager
Public Works Department | Water Division
251 South Hayes Avenue
Oxnard, California 93030
O: 805-200-5375 C: 805-228-2659
www.oxnard.gov
4/29/26, 11:46 AM City of Oxnard Mail - CITY OF OXNARD – NOTICE OF PREPARATION OF THE 2025 URBAN WATER MANAGEMENT PLAN AN… https://mail.google.com/mail/u/0/?ik=49c1a775dc&view=pt&search=all&permthid=thread-a:r-2177031559290848445%7Cmsg-a:r43640328757124612… 1/1 1479
City of Oxnard Public Hearing Notices
2025 Urban Water Management Plan- Draft | E
Appendix E Public Hearing Notices
E
1480
Documents to be added after public hearing and
adoption.
1481
City of Oxnard Resolution of UWMP and WSCP Adoption
2025 Urban Water Management Plan- Draft | F
Appendix F Resolution of UWMP and
WSCP Adoption
F
1482
Documents to be added after public hearing and
adoption.
1483
City of Oxnard Standard DWR Tables
2025 Urban Water Management Plan- Draft | G
Appendix G Standard DWR Tables
G
1484
CA5610007 OXNARD WATER DEPT 44,621 22,977
Total 44,621 22,977
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 Table 2-3.
NOTES:
Add additional rows as needed
Submittal Table 2-1 Retail: Public Water Systems
Has there been a change in the number of affiliated Public Water Systems since the 2020 UWMP? (OPTIONAL)
Public Water System
Number Public Water System Name Number of Municipal Connections 2025 Volume of Water Supplied 2025 1485
Water Supplier is also a
member of a SB X7-7
Regional Urban Water Management Plan (RUWMP)
NOTES:
Select One
or Both Type of Plan
Submittal Table 2-2: Plan Identification
Name of Regional Alliance or
RUWMP (Drop Down List)
Individual UWMP
1486
Supplier is a wholesale supplier
Supplier is a retail supplierUWMP Tables are in calendar yearsUWMP 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:
1487
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 in accordance with Water Code Section 10631 (h).
Wholesale Water Supplier Name Calleguas Muncipal Water DistrictUnited Water Conservation DistrictMetropolitan Water District NOTES:
1488
2025 2030 2035 2040 2045 2050(opt)
206,822 213,585 220,348 221,728 223,108 224,488
CWC 10631(a) describe the current and projected population of the service area including current and projected population… Submittal Table 3-1 Retail: Population - Current and ProjectedWater Code Section 10631(a) Population
Served
NOTES:
1489
Use Type
Volume
AF
Single Family Potable 9,315Multi-Family Potable 3,080Commercial Potable 3,554Industrial Potable 1,826Landscape Potable 2,684Other Fire Hydrant Potable 0Agricultural irrigation Potable 635Losses Potable 1,745 Sales/Transfers/Exchanges to Other Agencies Wheeled to PHWA Potable 138 22,977
0 22,977
Submittal Table 4-1 Retail: 2025 Actual Total Uses for Potable and Non-Potable WaterWater Code Section 10631(d)(1) 2025 Actual Water Use
Additional Description
(as needed) 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
Level of Treatment When
Delivered (OPTIONAL)
Drop down list
Subtotal Potable
Subtotal Non-Potable
Total
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table NOTES: identifies the unit of measure selected in Submittal Table 2-3. 1490
Use Type
2030 2035 2040 2045 2050 (opt)
AF AF AF AF AF
Single Family Potable 8,727 8,158 7,392 6,700 6,075Multi-Family Potable 3,859 3,607 3,269 2,963 2,686Commercial Potable 5,372 5,372 5,372 5,372 5,372Industrial Potable 3,042 3,870 4,897 6,174 7,766Landscape Potable 2,750 2,476 2,230 2,007 1,807Agricultural Potable 82 85 87 90 93Other Potable 1,107 927 777 655 554Distribution System Water Loss Potable 2,084 2,238 2,244 2,252 2,260Sales/Transfers/Exchanges to other Suppliers Transferred to PHWA Potable 492 521 563 589 604 27,515 27,254 26,831 26,802 27,217
0 0 0 0 0
27,515 27,254 26,831 26,802 27,217
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.Submittal Table 4-2 Retail: Total Uses of Potable, and Non-PotableWater - Projected Water Code Section 10631(d)(1)
Subtotal Non-Potable
Projected Water Use
(Report To the Extent that Records are Available)
Additional Description
(as needed) 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
Level of Treatment
When Delivered
(OPTIONAL)
Drop down list
Add additional rows as needed.
Subtotal Potable
Total
NOTES:
1491
Are Future Water Savings Included in Projections?
(Refer to Appendix K of UWMP Guidebook)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.
Pg 4 - 7
Are Lower Income Residential Demands Included In Projections? (Refer to Appendix K of UWMP Guidebook) 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. (An example is included in Appendix K.) Pg 4 - 8
Submittal Table 4-3 Retail: Inclusion in Water Use ProjectionsWater Code Section 10631 (a), 10631 (d)(4)(A), and 10631 (d)(4)(B) NOTES:
1492
Public Water System ID # Reported in
Table 2-1 R Reporting Period Submitted to DWR Water Loss Audit Program (yes/no) 2021 Yes2022 Yes2023 Yes2024 Yes2025 Yes
Submittal Table 4-5 Retail: Water Loss Audit Reporting | Water Code Section 10631(d)(3)(A) CA5610007
DWR NOTES: Suppliers will provide a reference to the WUEdata submittals of their Water Loss Audit Reports NOTES See Section 4.1.3 for references to the City's AWWA audits.
Report all five years for each Public Water System as available. 1493
Index
Volume of Total
Real Loss (from
AWWA Water
Loss Audit)
Volume of Total
Apparent Loss
(from AWWA Water
Loss Audit)
CA5610007 Yes 18 gpscd 44,621 1,004 20.1 12.1 gpscd 44,621 528 10.6 Number of Units
(Connections or Miles
corresponding with units
selected)
2028 Apparent Water
Loss Standard per Unit
per Day
Units for Apparent
Water Loss
Water Board's Calculated Water Loss Standards
Number of
Connections
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.
NOTES:
Submittal Table 4-6 Retail: Progress Towards 2028 Water Loss Standard 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? (y/n)
If no, Supplier will not complete this
row.
Real Water Loss Apparent Water Loss
State Water Board Standard Most Recent AWWA Water Loss Audit Real Water
Loss Per Unit per
Day
State Water Board Standard Most Recent AWWA Water Loss Audit Apparent Water
Loss Per Unit per Day
2028 Real Water Loss
Standard per Unit per
day
Units for Real
Water Loss
Drop down list
1494
Actual 2025 GPCD
(From SB X7-7
Compliance Form)
Did Supplier meet the
2020 Target in 2025?
No Individual 140 116 Yes NA
Submittal Table 5-1 Retail: SB X7-7 2020 Target ProgressWater Code Section 10608.40NOTES:
Actual 2020 GPCD2020 Target
Regional Alliance
Target or
Individual Target?
Drop down list
Was Supplier part of a merger or consolidation
since 2020?
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.
Did Supplier Achieve
Targeted Reduction
for 2020?
Only for suppliers that did not meet the
Target in 2020
1495
2021 2022 2023 2024 2025
AF AF AF AF AF
Alluvial Basin Oxnard 6,050 8,899 7,540 7,989 7,077
6,050 8,899 7,540 7,989 7,077
Submittal Table 6-1 Retail: Groundwater Volume PumpedWater 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 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
Water Type
(OPTIONAL)
Drop down list
Location or Basin Name
Total
NOTES
1496
Name of Wastewater
Collection Agency
Wastewater
Volume Metered
or Estimated?
OPTIONAL
Drop Down List
Volume of
Wastewater
Collected from
UWMP Service
Area 2025
Name of Wastewater Treatment
Plant (WWTP)
Drop down list
Is WWTP Located
Within UWMP
Area?
Drop Down List
City of Oxnard Metered 22,805 Oxnard WWTP, Place ID 246946 Yes 22,805
There is no wastewater collection system. The supplier will not complete the table below.
Submittal Table 6-2 Retail: Wastewater Collected Within Service Area in 2025 | Water Code Section 10633(a) Percentage of 2025 service area population covered by wastewater collection system (OPTIONAL)Percentage of 2025 service area covered 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:
NOTES:
1497
Volume Volume Volume Volume Volume
AF AF AF AF AF AF AF
Oxnard WWTP, Place ID
246946 Yes 22805 25,969 - Secondary, Disinfected - 2.2 125 Secondary, Disinfected - 2.2 22680 - - 22,805 25,969 0 125 22,680 0 0
Treatment Level
Drop down list
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
Treatment Level
Drop down list Name of other entity
Submittal Table 6-3 Retail: Wastewater Treatment and Outcomes Within UWMP Service Area in 2025 Check the box if no wastewater is treated or disposed of within the UWMP service area. Proceed to the next table.
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
2025 Volume of
Wastewater
Received from
UWMP Service
Area
(As Reported in
Submittal Table 6-
2 R )
Total 2025
Volume of
Water
Treated
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
Drop down list
Treatment Level
Drop down list
Treatment Level
Drop down list
1498
2025 2030 2035 2040 2045 2050 (opt)
Volume
Narrative
page number
(OPTIONAL)
Agricultural Irrigation 0 0 0 0 0 0
Groundwater Recharge (IPR) ASR Recovered 0 3,000 6,400 6,400 6,400 6,400 10,200 Table 6-8Groundwater Recharge (IPR) Recycled Water Pumpback Allocation 0 200 250 1,250 1,250 1,250 0 0 0 0 0 0 10,200
Submittal Table 6-4 Retail: Recycled Water Direct Beneficial Uses Within Service AreaWater Code Section 10633 (c)(e)Name(s) of Facility/ies Producing (Treating) the Recycled Water (OPTIONAL) :Name of Supplier Operating the Recycled Water Distribution System (OPTIONAL) :Supplemental Water Added in 2025 (volume) Include units (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 NOTES:The City currently delivers recycled water to 2-3. agricultural customers outside of the water service area, so 0 AFY is shown for agricultural irrigation. The City intends to increase deliveries of recycled water for which it receives a Recycled Water Pumpback Allocation, which is shown here to reflect that recycled water was delivered but is quantified as potable supply in Report Table 6 11. 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 (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.
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
Use Type
Drop down list
Water Type
(after treatment if
treated)
(OPTIONAL)
Drop down list
Additional Information
(as needed)
Total
Source of 2025 Supplemental Water (OPTIONAL) :
1499
2020 Projection for 2025 2025 Actual Use
3,875 0
780 0
1,345 0
6,000 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 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 Landscape irrigation (exc golf courses)
Golf course irrigationCommercial useIndustrial reuseGeothermal and other energy production Wetlands or wildlife habitatGroundwater recharge (IPR)NOTES:Submittal Table 6-5 Retail: 2020 UWMP Recycled Water Use Projection Compared to 2025 ActualWater 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.
Use Type
Insert additional rows as needed using the types found in this list Agricultural irrigation
Reservoir water augmentation (IPR) Direct potable reuseOther (Description Required) 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 Seawater intrusion barrierRecreational impoundment
1500
Expected
Increase in
Recycled
AF
Indirect Potable Reuse Aquifer Storage Recovery (ASR) Injection Well #1 3,200Indirect Potable Reuse AWPF Improvements/Upgrade TBDIndirect Potable Reuse AWPF Expansion 7,000Indirect Potable Reuse AWPF Recycled Water Storage Construction TBDIndirect Potable Reuse ASR Injection Well Field TBD 10,200
2031202720292031
TBD
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: (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.
Unit Conversion to AF
DWR NOTES: Units of measure (AF, CCF, MG) 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. NOTES:
Total
Submittal Table 6-6 Retail: Methods to Encourage Future Recycled Water Use 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 Name of Action Description Planned Implementation Year
1501
AF
IPR – AWPF Expansion No ASR/Injection Well #1 2027 All Year Types 3,200IPR – AWPF Expansion No AWPF Improvements/Upgrades 2029 All Year Types TBD IPR – AWPF Expansion No AWPF Expansion 2031 All Year Types 7,000IPR – AWPF Expansion No AWPF Recycled Water Storage Construction TBD All Year Types TBDIPR – AWPF Expansion No ASR/Injection Well Field 2031 All Year Types TBD 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: *Use of this supply will decrease use from other sources (i.e. imported water).
Submittal Table 6-7 Retail: Expected Future Water Supply Projects or Programs 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.Procees to the next table.
Name of Future Projects or
Programs
Joint Project with other suppliers?
Additional Description
(as needed)
Water Type (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 Drop Down
List
(yes/no)
If Yes, Supplier Name
Provide page location of narrative in the UWMPCheck 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. 1502
Water Supply
Actual Volume Total Entitlement
(OPTIONAL)
AF AF
Groundwater (not desalinated) City Potable 7,077Groundwater (not desalinated) United Potable 8,278Purchased or Imported Water Calleguas Potable 7,485Purchased or Imported Water Wheeled to PHWA Potable 138 22,978 0
0 0
22,978 0
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 Total
Subtotal Potable
Subtotal Non-Potable
NOTES:Submittal Table 6-8 Retail: Water Supplies — 2025 Actual Additional Description
(as needed)
2025
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
Water Type
(after treatment if
treated)
(OPTIONAL)
Drop Down list
1503
2021 2022 2023 2024 2025
AF AF AF AF AF
City Desalter 8,400 Vertical Well Groundwater Brine Line 3622 4135 1665 1137 841 3622 4135 1665 1137 841
OPTIONAL Submittal 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
Brine Discharge
Drop down list
Name(s) of Agencies that
Receive this Water
Total
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.
Desalination Facility
Drop Down list Plant Capacity Intake Type Drop down list Source Water Type Drop down list Influent TDS 1504
Water Supply
Reasonably
Available
Total Entitlement
(OPTIONAL)
Reasonably
Available
Total Entitlement
(OPTIONAL)
Reasonably
Available
Total Entitlement
(OPTIONAL)
Reasonably
Available
Total Entitlement
(OPTIONAL)
Reasonably
Available
Total Entitlement
(OPTIONAL)
AF AF AF AF AF AF AF AF AF AF
Groundwater (not desalinated) City Groundwater Potable 6,874 5,754 4,635 4,635 4,635Groundwater (not desalinated) United Groundwater Potable 7,275 6,090 4,905 4,905 4,905 Purchased or Imported Water Calleguas Potable 12,666 12,033 11,431 11,431 11,431 Other Calleguas - Transferred to PHWA Potable 492 521 563 589 604 Other ASR Recovered Potable 3,000 6,400 6,400 6,400 6,400Other Recycled Water Pumpback Allocation Potable 200 250 1,250 1,250 1,250Other Groundwater Allocation Used Potable 0 0 0 0 0 30,507 0 23,878 0 20,971 0 20,971 0 20,971 0
#N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A
30,507 0 31,049 0 29,184 0 29,210 0 29,225 0
Subtotal Potable
Subtotal Non-Potable
Total
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.
NOTES:
Submittal Table 6-9 Retail: Water Supplies — ProjectedWater Code Section 10631 (b) Additional Detail on
Water Supply
Water Type
(after treatment if
treated)
(OPTIONAL)
Drop Down list
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
2030 2035 2040 2045 2050 (opt)
1505
Water Delivery Product
drop down list
(If delivering more than one type of product recommend using Table O-1C) Start Date of Reporting Period 1/1/2024
End Date of Reporting Period 1/1/2025
Is upstream embedded energy in the values reported? No
Units of Measure for Water AF Total Utility See DWR NOTES Hydropower Net Utility 22,977 22,977
2,864,350 2,864,350
125 - 125
Quantity of Self-Generated Renewable Energy
Data Quality (Estimate, Metered Data, Combination of Estimates and Metered Data)Data Quality Narrative:Narrative:
NOTES:
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 Optional Submittal Table O-1B: Recommended Energy Reporting - SINGLE DELIVERY PRODUCT - TOTAL UTILITY APPROACH Only for Water Delivery Products Under the Urban Water Supplier's Operational Control
Sum of All Water Management
Processes Non-Consequential Hydropower
Volume of Water Entering Process
1506
Average Year 2011 100%
Single-Dry Year 2013 108%Consecutive Dry Years 1st Year 2013 108%Consecutive Dry Years 2nd Year 2014 100%Consecutive Dry Years 3rd Year 2015 91%Consecutive Dry Years 4th Year 2016 91%Consecutive Dry Years 5th Year 2017 94% 28,189
AF
30,45430,45428,323
NOTES:
25,62425,63826,487
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.
OPTIONAL Submittal Table 7-1 Retail: Basis of Water Year Data (Reliability Assessment) 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
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.
Quantification of available supplies is provided in this table as either volume only, percent only, or both.
Volume Available % of Average Supply
1507
2030 2035 2040 2045 2050 (Opt)
AF AF AF AF AF
Supply totals(autofill from Submittal Table 6-9 R)
30,507 31,049 29,184 29,210 29,403
Use totals(autofill from Submittal Table 4-2 R)
27,516 27,253 26,831 26,801 27,217
Surplus/(shortfall) 2,991 3,796 2,354 2,409 2,187 WSCP - supply augmentation benefit WSCP - use reduction savings benefit Revised Surplus/(shortfall) Submittal Table 7-2 Retail: Normal Year Supply and Use ComparisonWater Code Section 10635 (a) NOTES: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. 1508
2030 2035 2040 2045
2050
(Opt)
AF AF AF AF AF
Supply totals 30,507 31,049 29,184 29,210 29,403 Use totals 29,727 29,442 28,986 28,954 29,403 Surplus/(shortfall) 780 1,606 198 256 0 WSCP - supply augmentation benefitWSCP - use reduction savings benefitRevised Surplus/(shortfall) 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 Submittal Table 7-3 Retail: Single Dry Year Supply and Use ComparisonWater Code Section 10635(a) 1509
2030 2035 2040 2045 2050 (Opt)
Supply totals 30,507 31,049 29,184 29,210 29,403 Use totals 29,727 29,442 28,986 28,954 29,403 Surplus/(shortfall) 780 1,606 198 256 0 WSCP - supply augmentation benefitWSCP - use reduction savings benefitRevised Surplus/(shortfall)Supply totals 30,507 31,049 29,184 29,210 29,403 Use totals 27,594 27,298 26,953 27,012 27,407 Surplus/(shortfall) 2,913 3,751 2,232 2,198 1,997 WSCP - supply augmentation benefitWSCP - use reduction savings benefitRevised Surplus/(shortfall)Supply totals 30,507 31,049 29,184 29,210 29,403 Use totals 24,916 24,619 24,378 24,513 24,849 Surplus/(shortfall) 5,591 6,429 4,806 4,697 4,554 WSCP - supply augmentation benefitWSCP - use reduction savings benefitRevised Surplus/(shortfall)Supply totals 30,507 31,049 29,184 29,210 29,403 Use totals 24,882 24,556 24,386 24,602 24,917 Surplus/(shortfall) 5,625 6,493 4,798 4,608 4,486 WSCP - supply augmentation benefitWSCP - use reduction savings benefitRevised Surplus/(shortfall)Supply totals 28,607 29,244 27,470 27,496 27,511 Use totals 25,657 25,290 25,189 25,495 25,799 Surplus/(shortfall) 2,950 3,953 2,281 2,000 1,711 WSCP - supply augmentation benefitWSCP - use reduction savings benefitRevised Surplus/(shortfall) Submittal Table 7-4 Retail: Multiple Dry Years Supply and Use ComparisonWater Code Section 10635(a) First year
OPTIONAL Planned WSCP Actions
Second year
OPTIONAL WSCP Actions
Third year
OPTIONAL Planned WSCP Actions
Fourth 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
Fifth year
OPTIONAL Planned WSCP Actions
NOTES:
1510
Total
Total Water Use 25,578
Total Supplies 30,507
4,929
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Total
Total Water Use 24,630
Total Supplies 30,507
5,877
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Total
Total Water Use 23,043
Total Supplies 30,507
7,464
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Total
Total Water Use 23,817
Total Supplies 30,507
6,690
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Total
Total Water Use 25,393
Total Supplies 28,607
3,214
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Surplus/Shortfall w/o WSCP Action
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) 2027
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) 20282026
Submittal Table 7-5 Retail: Five-Year Drought Risk AssessmentWater Code Section 10635(b)(3) Revised Surplus/(shortfall)
Surplus/Shortfall w/o WSCP Action
Revised Surplus/(shortfall)
Surplus/Shortfall w/o WSCP Action
Revised Surplus/(shortfall)
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) Surplus/Shortfall w/o WSCP Action
2029
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) Revised Surplus/(shortfall)
2030
Surplus/Shortfall w/o WSCP Action
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation) 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:
1511
Standard
Shortage
Levels
Percent Shortage
Range
Suppliers
Shortage Levels
Percent Shortage
Range
1 Up to 10% 1 Up to 15%
2 Up to 20% 1,2 15 - 25 %3 Up to 30% 2,3 25 - 35 %4 Up to 40% 3,4 >35%5 Up to 50% 4 >35%6 >50% 4 >35% Submittal Table 8-1: Cross-reference for Standard vs Supplier Shortage LevelsWater 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:
1512
No
Shortage Gap Reduction
Value
(May be a range)
AF
Submittal Table 8-2 Retail: Supply Augmentation and Other Actions Is the Supplier completing this table using the standard six levels? (yes/no) 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
How much is this going to reduce the shortage gap?
Additional Explanation or Reference
(OPTIONAL)
Volume or Percentage
Drop down
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. NOTES:
1513
Shortage
Gap
Reduction
Value
(May be a
range)
AF
All Expand Public Information Campaign Yes
All Reduce System Water Loss YesAll
Other - Customers must repair leaks, breaks, and malfunctions in a timely manner 5,196
EPA Cases in Water Conservation: How Efficiency Programs Help Water Utilities Save Water and Avoid Costs (United States Environmental Protection Agency, Office of Water, 2002) Yes
All Other water feature or swimming pool
restriction
Draining of pools or refilliong shall be done only for health and safety reasons. Yes All CII - Restaurants may only serve water
upon request
12 Southwest Florida Water Management (Southwest Florida Water Management District, 2018) Yes All CII - Lodging establishment must offer opt out of linen service Yes All CII - Commercial kitchens required to use pre-rinse spray valves 1,824 EPA WaterSense, Saving Water in Restaurants (United States Environmental Protection Agency, 2012) Yes All Pools and Spas - Require covers for pools and spas 26 Arlington, Virginia, Water & Utilities. (Arlington County Government, n.d.) Yes All Landscape - Other landscape restriction or prohibition Free flowing hoses are prohibited; automatic shut-off hoses are required. Yes All Landscape - Restrict or prohibit runoff from landscape irrigation Yes All Landscape - Limit landscape irrigation to specific times 301 Texas Living Waters (Texas Living Waters Project, 2018) Yes All Landscape - Limit landscape irrigation to specific days 840 CalWep WSCP Toolkit 2021; City of Sacramento and City of Clovis; AWE Use and Effectiveness of Municipal Irrigation Restrictions During Drought Study Report, January 2020. (California Water Efficiency Partnership, 2021) Yes
All Landscape - Limit landscape irrigation to specific days Irrigation of parks, school ground areas, and road median landscaping will not be permitted more than twice a week and only if necessary.
All Landscape - Prohibit certain types of landscape irrigation Irrigation of ornamental turf on public medians with potable water prohibited. Yes All Landscape - Other landscape restriction or prohibition Limits on watering duration. Watering or irrigation of lawns, landscape or other vegetated area with potable water using a landscape irrigation system or a watering device that is not continuously attended is limited to no more than 15 minutes per day per station. This does not apply to landscape irrigation systems that exclusively use high efficiency irrigation equipment, very low-flow drip type irrigation systems when no emitter produces more than two gallons of water per hour, and weather based controllers or high-efficiency stream rotor sprinklers.
All Landscape - Restrict or prohibit runoff from landscape irrigation Irrigation of newly constructed home and building exteriors with potable water is prohibited unless drip or microspray systems are used. Yes All Landscape - Other landscape restriction or prohibition Golf course water use shall be limited. Limitation on the irrigation of roughs shall be implemented before limitations on fairway irrigation. Efficient use of recycled water on any golf course shall not be limited.
All Landscape - Other landscape restriction or prohibition Application of potable water to landscapes during and within 48 hours after measurable rainfall is prohibited. Yes All Other - Require automatic shut of hoses 8 Maryland Department of the Environment (Maryland Department of the Environment, n.d.) Yes All Other - Prohibit use of potable water for construction and dust control 2,361 Maryland Department of the Environment (Maryland Department of the Environment, n.d.) Yes All Other
The City may not issue new construction meters or short-term water use unless reclaimed or non-potable water is used, unless potable water is necessary to protect the health, safety, or welfare.
Yes
All Other - Prohibit use of potable water for washing hard surfaces No water use to clean surfaces. The use of running water from a hose, pipe, or faucet to clean buildings, pavement, tile, wood, plastic, driveways, parking lots, and other paved surfaces is prohibited, except for public health and safety reasons and then only with a hose and automatic shut-off nozzle.
Yes
All Decrease Line Flushing 143 CalWep WSCP Toolkit 2021; City of Clovis (California Water Efficiency Partnership, 2021) Yes All Implement or Modify Drought Rate Structure or Surcharge Yes All Other 4,936
All types of rebates; EPA Cases in Water Conservation: How Efficiency Programs Help Water Utilities Save Water and Avoid Costs; Evaluating the Effectiveness of a Water Conservation Campaign: Combining Experimental and Field Methods (United States Environmental Protection Agency, Office of Water, 2002) Yes
2 & Up Other
Reduce indoor and outdoor water use by specified percentage as determined (based on Shortage Stage). Contact the City Water Division or visit OxnardWater.org for additional tips and techniques to reduce water use. 2 & Up Other
The use of water from fire hydrants shall be limited to fire fighting and related activities and other uses of water for municipal purposes shall be limited to activities necessary to maintain the public health, safety, and welfare. 2 & Up Other
Commercial car wash and laundry systems. Installation of new or replacement non re-circulating water systems in commercial conveyor car wash or commercial laundry systems is prohibited. 2 & Up Other
The manager shall grant prior approval for water to be used on a one-time or short-term basis for construction and dust control. The user shall submit to the manager its water use plan at least 30 days in advance of the proposed use. 3 & Up Other
Commercial/industrial cooling systems: installation of new or replacement single pass cooling systems in commercial or industrial buildings is prohibited.
Yes
3 & Up
Water Features - Restrict water use for decorative water features, such as fountains Yes
3 & Up
Water Features - Restrict water use for decorative water features, such as fountains Where and when available, approved non-potable water shall be used to fill or refill recreational or ornamental lakes, ponds, or fountains. When using non-potable water, the user shall post signs in conspicuous areas identifying the fact that non-potable water is being used. Newly installed or replacement ponds and fountains shall include recirculation pump(s) that maximize the efficiency and reuse of fill water. 3 & Up Other water feature or swimming pool restriction Watering to maintain the level of water in swimming pools shall occur only when essential. 4 & Up
Other - Prohibit vehicle washing except at facilities using recycled or recirculating water 4 & Up Landscape - Other landscape restriction or prohibition Depending on the drought severity, the use of potable water for irrigation uses may be restricted or prohibited. The manager shall have the right to shut off water service to any such irrigation service upon seven days advance notice to the customer.
Yes
4 & Up Other
Issuance of building permits which require new or expanded water service may be limited or withheld, except to protect the public's health, safety and welfare, or in cases which meet the City Council adopted conservation and offset requirements.
Yes
Submittal Table 8-3 Retail: Demand Reduction Actions
Is the Supplier completing this table using the standard six levels? (yes/no) 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.
How much is this going to reduce the
shortage gap?
Additional Explanation or Reference
(OPTIONAL)
Penalty, Charge, or Other Enforcement?
For Retail Suppliers Only
Drop Down List
Volume or Percentage
Drop down
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. NOTES:
1514
City Name 60 Day Notice Drop Down (yes/no) Notice of Public Hearing Drop Down (yes/no)
Camarillo YesVentura YesPort Hueneme Yes
County Name
Drop Down List
60 Day Notice
Drop Down (yes/no)
Notice of Public
Hearing
Drop Down (yes/no)
Ventura County Yes
NOTES: The City also notified Channel Islands Beach CSD, Naval Base Ventura County, Calleguas Municipal Water District, and United Water Conservation District.
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.
Submittal Table 10-1 Retail: Notification to Cities and CountiesWater Code Section 10621(b) and 10642 Add additional rows as neededAdd additional rows as needed 1515
Urban Water Management Plan
City of Oxnard
May 2 6 , 2026
1516
Background
Elements
Water Use
Water Supply
Agenda
Water Reliability
Demand Management
Measures
Water Shortage
Contingency Plan
Conclusion
1517
About Urban Water Management Plans
(UWMPs)
• Required by the California Water
Code
• Must be updated every 5 years and
submitted to DWR
• Supports long-term water supply and
drought planning
• Coordinated with land use
• Ensure supplies meet existing and
projected demands over a minimum
20-year horizon through 2045, or
optionally 2050
• Provides framework for conservation
and drought response
• Pre-requisite for certain loans
and grants
1518
Background- Communication and Outreach
• UWMP Act requires coordination with other local agencies. The City notified development of the UWMP and coordinated, when possible, with the following agencies:
• Calleguas Municipal Water District
• United Water Conservation District
• Port Hueneme Water Agency
• County of Ventura
• Metropolitan Water District of Southern California
• Cities of Camarillo, Ventura, Port Hueneme
• Fox Canyon Groundwater Management Agency
• Channel Islands Beach Community Services District
• Naval Base Ventura County
2025 UWMP - City of Oxnard
4 1519
Background- Communication and Outreach
• Consistent with the UWMP Act, the City will publish public hearing notices in a local newspaper for the June 16th City Council Meeting • Access to the UWMP and Water Shortage contingency Plan (WSCP) will be available at https://www.oxnard.org/city-department/publicworks/water/uwmp/ 2025 UWMP - City of Oxnard
5 1520
UWMP Elements
2025 UWMP - City of Oxnard
6 Introduction and Lay Description Water Supply Characterization Plan Preparation Water Service Reliability and Drought
Risk Assessment
System Description Water Shortage Contingency Plan
Water Use Characterization Demand Management Measures
Senate Bill x7-7 Baselines, Targets and
2025 Compliance
Plan Adoption, Submittal, and
Implementation
1521
Water Use Characterization & SBx7-7 Compliance
2025 UWMP - City of Oxnard
7 2020 Target:
140 gallons per capita
per day (gpcd)
City Achieved Target in
2020 and 2025?
YES
129127131
147
131128131132
140
133132131135
124
114113109112117
112
117
110
98 99 97
0 20
40 60
80 100
120
140
160
0 5,000
10,000
15,000
20,000
25,000
30,000
35,000
Daily per Capita Water use (gpcd)
Gross Water Use, AFY
Gross Water Use, AFY Daily per Capita Water Use (gpcd)
1522
Water Use Characterization
2025 UWMP - City of Oxnard
8 1523
Water Use Characterization
• Considered “Making Conservation a California Way of Life” Regulation Urban Water Use Objectives (UWUO)
• UWUO = Residential Indoor Water Use Budget + Residential Outdoor Water Use Budget + Commercial, Industrial, and Institutional (CII) Dedicated Irrigation Meters (DIM) Outdoor Water Use Budget + Real Water Loss Budget
• Considered historic baseline demand per connection per customer type & SCAG growth
• Used baseline demands reduced at a constant rate to meet UWUO by 2050 (see chart on previous slide)
• High-level demand methodology to plan for sufficient supply to meet the population/housing growth from SCAG forecast, which incorporated City General Plan & City input
• Does not project development-specific demand using demand per dwelling unit or per acre factors by land use type.
2025 UWMP - City of Oxnard
9 0
5,000
10,000
15,000
20,000
25,000
30,000
2020 2025 2030 2035 2040 2045 2050
Water Use, AFY
Existing- Residential Indoor Existing- Residential Outdoor Existing- CII DIM Existing- Real Water Losses
Existing- Excluded Demands New- Residential Indoor
New- Residential Outdoor New- CII DIM
New- Real Water Losses New- Excluded Demands
Existing- Future Total UWUO Demand Target
1524
Water Supply
2025 UWMP - City of Oxnard
10 Local Groundwater
• City extracts from the
Oxnard Plain
Groundwater Basin
• United Water
Conservation District
(United) extracts
groundwater for the
City further inland
Imported Water
• State Water Project
(SWP) water through
Calleguas Municipal
Water District
(Calleguas) &
Metropolitan Water
District
Recycled Water
• Produced at the
Advanced Water
Purification Facility
(AWPF)
• Used for agricultural
irrigation, future
groundwater
recharge and indirect
potable reuse
1525
Water Supply
2025 UWMP - City of Oxnard
11 PROJECTED WATER SUPPLY, AFY
2030 2035 2040 2045 2050
WATER SUPPLY
ADDITIONAL DETAIL ON WATER
SUPPLY
AVAILABLE
VOLUME
AVAILABLE
VOLUME
AVAILABLE
VOLUME
AVAILABLE
VOLUME
AVAILABLE
VOLUME
Groundwater City Groundwater 6,874 5,754 4,635 4,635 4,635 Groundwater United Groundwater 7,275 6,090 4,905 4,905 4,905 Purchased or Imported
Water Calleguas 12,666 12,033 11,431 11,431 11,431
Other Calleguas - Transferred to PHWA 492 521 563 589 604 Other IPR 3,000 6,400 6,400 6,400 6,400
Other Recycled Water Pumpback Allocation 200 250 1,250 1,250 1,250 Other Groundwater Allocation Used 0 0 0 0 0
TOTAL: 30,507 31,049 29,184 29,210 29,225
1526
Water Reliability & Drought Risk Assessment
2025 UWMP - City of Oxnard
12 • City supplies meet demands in normal, single dry, and five-consecutive years of drought through 2050
1527
Water Reliability & Drought Risk Assessment
2025 UWMP - City of Oxnard
13 2030 2035 2040 2045 2050
First Supply Totals, AFY 30,507 31,049 29,184 29,210 29,403 Year Demand Totals, AFY 29,727 29,442 28,986 28,954 29,403 DIFFERENCE: 780 1,606 198 256 0
Second Supply Totals, AFY 30,507 31,049 29,184 29,210 29,403 Year Demand Totals, AFY 27,594 27,298 26,953 27,012 27,407 DIFFERENCE: 2,913 3,751 2,232 2,198 1,997
Third Supply Totals, AFY 30,507 31,049 29,184 29,210 29,403 Year Demand Totals, AFY 24,916 24,619 24,378 24,513 24,849 DIFFERENCE: 5,591 6,429 4,806 4,697 4,554
Fourth Supply Totals, AFY 30,507 31,049 29,184 29,210 29,403 Year Demand Totals, AFY 24,882 24,556 24,386 24,602 24,917 DIFFERENCE: 5,625 6,493 4,798 4,608 4,486
Fifth Supply Totals, AFY 28,607 29,244 27,470 27,496 27,511 Year Demand Totals, AFY 25,657 25,290 25,189 25,495 25,799 DIFFERENCE: 2,950 3,953 2,281 2,000 1,711
1528
Demand Management Measures (DMM)
2025 UWMP - City of Oxnard
14 DMM Status
1. Water waste prevention ordinances
2. Metering
3. Conservation pricing
4. Public education and outreach
5. Real water loss management programs and systems
6. Water conservation program and staffing support
7. Other Demand Management Measures
Residential Plumbing Retrofit
School Education Programs
Rebates
Water Neutrality Policy
1529
Water Shortage Contingency Plan (WSCP) Elements
2025 UWMP - City of Oxnard
15 Water Supply Reliability Analysis Legal Authority
Annual Water Supply and Demand
Assessment Procedures
Financial Consequences of WSCP
Implementation
Six Standard Shortage Stages Monitoring and Reporting
Shortage Response Actions WSCP Refinement Procedures
Communication Protocols Special Water Features Distinctions Compliance and Enforcement Plan Adoption, Submittal, and Availability 1530
Water Shortage Contingency Plan (WSCP)
• Provides flexible guidelines for the City Council, staff, and the public for identifying anticipated water shortages and response actions to allow for efficient management of any water shortage • Oxnard Stages Translated to State’s Six standard stages:
• WSCP is considered a standalone document and can be amended separately from the UWMP, if needed.
2025 UWMP - City of Oxnard
16 1531
2025 UWMP Conclusions
• Expanding local water supplies, improving drought resilience, and reducing dependence on imported water
• Supply is expected to meet current and projected demands through 2050 with continued water use efficiency and increased recycled water recharge for indirect potable reuse
• Achieved 2020 SBx7-7 compliance in 2025 & the City is positioned to comply with State-mandated Urban Water Use Objective by 2040
• The UWMP is anticipated to meet all DWR requirements
2025 UWMP - City of Oxnard
17 1532
Questions?
1533
Submit Feedback
Abraham Maldonado
Water Resources Manager
Public Works Department, Water Division
[email protected]
For more details, visit the City’s website:
https://www.oxnard.org/city-department/public-works/water/uwmp/ 2020 UWMP - City of Oxnard
19 1534
1535
CITY COUNCIL AGENDA REPORT
PUBLIC HEARINGS
AGENDA ITEM NO. M.2
DATE: June 16, 2026
TO: City Council
FROM: Michael Wolfe, Public Works Director, (805) 385-8055, [email protected] SUBJECT: Fiscal Year (FY) 2026-27 Resolution to Levy Assessments in the Waterways Maintenance District.
RECOMMENDATION
That the City Council, acting as the legislative body for the Waterways Maintenance District:
1. Hold a public hearing regarding proposed assessments for the Waterways Maintenance District for Fiscal Year 2026-27;
2. Adopt a resolution to levy the maintenance assessment on property within the Waterways Maintenance District for Fiscal Year 2026-27; and
3. Authorize the Approval of Agreement A-8620, entered into by and between the City of Oxnard and the Harbour Island Homeowners Association, accepting the donation of $10,000 from the Harbour Island Homeowners Association (HOA) to support landscape maintenance and on-call services within the Waterways Maintenance District Zone 2.
(Finance and Governance Committee approved 2-1 on May 26, 2026.) Please click the following link to view the required Measure M pre-recorded presentation video: https://youtu.be/TEOgcMSTv6Q
BACKGROUND
Special Districts is a Division of the Public Works Department and manages a total of 50 special financing districts, including the Waterways Maintenance District (the “District”). On June 16, 1970, the City formed the District pursuant to the maintenance district provisions of the Improvement Act of 1911 (Streets and Highways Code Section 5820 et seq.).
The District was formed at the request of the owner (developer) of the property included within the District to finance the capital costs and maintenance and operation expenses for the sidewalks, streets, waterways, flood control, drainage systems, vector control, landscaping, parking areas, and fences.
DISCUSSION
Each year, prior to levying the assessment on the property tax rolls, the City Council is required to review the estimated costs of maintaining and operating the improvements within the District, to decide whether the costs of such maintenance and operations shall be borne wholly or partially by the District. Only after conducting a Public Hearing to receive public input, can the City Council consider making a decision to levy the assessments in an amount sufficient to raise the money to pay for such costs within the District. As this district was levied at its maximum rate in FY 2025-26, the assessment is not proposed to change for FY 2026-27. The proposed assessments for Fiscal Year 2026-27 (FY 2026-27) are identified below:
1536
FY 2026-27
Waterways
Maintenance District Maximum Rate Applied Rate
Qualified Elector
Approved Annual
Adjustment
Projected Assessment
Revenue1
Zone 1 (Mandalay Bay) $444,258.00 $444,258.00 N/A $444,258.00 Zone 2 (Harbour Island) $47,949.00 $47,949.00 N/A $47,949.00 1 Subject to change depending on Ventura County's final assessment roll The deadline to deliver the assessment information to Ventura County for inclusion on the FY 2026-27 property tax roll is July 6, 2026.
WAD Zone 2 (Harbour Island) Donation Agreement
Special Districts staff has met with the Harbour Island HOA on multiple occasions to address the recurring budget shortfalls in Waterways Maintenance District Zone 2, which continue to be impacted by Proposition 218’s cap on annual assessments. The HOA has provided financial contributions on several occasions in recent years to help maintain service levels in the absence of additional assessment revenue. In FY 2020-21, the HOA donated $4,853 to WAD Zone 2 to fund water quality remediation efforts in the channel. The HOA also donated $15,446 in FY 2023-24, and $17,400 in FY 2025-26 to WAD Zone 2 to fully fund contracted landscape services in Harbour Island for the year, as well as additional maintenance needs, including irrigation repairs, plant material replacement, and mulching.
During FY 2026-27 budget discussions, the HOA indicated that rather than consider a Proposition 218 ballot proceeding, they would elect to proceed with a donation to the district to fund maintenance expenses. For FY 2026-27, the HOA has agreed to provide a $10,000 donation, which brings total projected revenues for Zone 2 to $57,949 and will be reflected in the City’s proposed budget for Zone 2.
STRATEGIC PRIORITIES
This agenda item is a routine operational item or does not relate to the five strategic priorities adopted by City Council on March 16, 2021.
FINANCIAL IMPACT
Property owners pay the assessments as a part of their annual property tax bill. The assessment, including inflationary adjustments where applicable, has been approved by the property owners through prior proceedings. Funds received for the benefit of the District are restricted and can only be used to fund the services of the District. There is no impact to the General Fund. The District’s projected maintenance costs for FY 2026-27 are outlined below:
1537
Projected FY 2026-27 Expenses
Waterways Zone 1 (Mandalay Bay) $ 479,207.00
Waterways Zone 2 (Harbour Island) $ 76,256.00
Total $ 555,463.00
Projected FY 2026-27 Assessment
Revenues1
Zone 1 (Mandalay Bay) $ 444,258.00
Zone 2 (Harbour Island) $ 47,949.00
Total $ 492,207.00
Projected Assessment Revenue vs
Expenses2
($63,256)
1 allocated based on parcel count; allocated based on % split of costs at time of District formation 2 Expenses that exceed revenues are funded by other sources such as Zone fund balance, donations, or interest income All expenses above projected FY 2026-27 revenues are proposed to be funded via available fund balance.
COMMITTEE OUTCOME
The Finance and Governance Committee approved 2-1 on May 26, 2026 to approve the staff recommendation and to forward the item for Council approval.
Please click here to view the Measure M pre-recorded presentation video.
Please click here to view the May 26, 2026 Finance and Governance Committee Meeting recording.
Prepared by: Steve Howlett, Assistant Public Works Director, Anthony Miller, Special Districts Manager
ATTACHMENTS
1. Resolution Levying Fiscal Year 2026-27 Maintenance Assessment for Waterway Maintenance District
2. FY 2026-27 Tax Roll for Waterways Zones 1 and 2
3. Harbour Island HOA Donation Agreement A-8620
4. Special Districts Map
5. Special Districts List
6. Presentation
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CITY COUNCIL OF THE CITY OF OXNARD
RESOLUTION NO.
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF OXNARD LEVYING MAINTENANCE ASSESSMENTS FOR FISCAL YEAR 2026-27 ON REAL PROPERTY IN
THE WATERWAYS MAINTENANCE DISTRICT
WHEREAS, by Resolution No. 5144, adopted June 16, 1970, the City Council formed the Waterways Maintenance District (“District”) pursuant to Chapter 26 of Part 3 of the Improvement Act of 1911 (Streets and Highways Code Section 5820 et seq.); and WHEREAS, in 1971, 1987, and 1993, the City Council annexed territory to the District; and WHEREAS, as required by Streets and Highways Code Section 5830, the City Council annually fixes the rate of the maintenance assessment levied in connection with the District; and WHEREAS, the City Council desires to fix the rate for the maintenance assessment for Fiscal Year 2026-27 at the same rate as it was levied in Fiscal Year 2025-26; and WHEREAS, the City Council desires that the maintenance assessments for Fiscal Year 2026-27 be levied and collected on the Ventura County property tax bill.
NOW, THEREFORE, the City Council of the City of Oxnard resolves:
1. The budget for Fiscal Year 2026-27 for the Waterways Maintenance District is hereby approved as follows:
Landscape and Waterways Maintenance $389,500
Direct Staff Charges $113,598
Overhead $47,346
Consulting $3,605
County Collection Fee $1,414
$555,463
2. The costs outlined in Section 1 up to the maximum permissible assessment amount of $492,207 shall be borne by the District; the remainder shall be borne by the Improvement Fund of the District or other funds made available to the District.
3. The rate of the maintenance assessment necessary to raise $492,207 for the fiscal year beginning July 1, 2026 is hereby fixed as set forth in the Assessment Roll attached hereto as Exhibit A and said maintenance assessment is hereby levied.
1539
Resolution No.
Fiscal Year 2026-27 Maintenance Assessment for Waterway Maintenance District