Agenda packet — Atwater City Council, March 14, 2022 (part 3 of 4)

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
i

CITY OF ATWATER
2020 URBAN WATER MANAGEMENT PLAN

CONTACT SHEET
Date plan adopted:

Justin Vinson, Public Works Superintendent
City of Atwater
Phone: (209) 777-0273
Email: [email protected]
Aja Verburg, P.E., Project Manager
Black Water Consulting Engineers, Inc.

Phone: (209) 753-0078
Email: [email protected]
Alison Furuya, P.E., Project Engineer
Black Water Consulting Engineers, Inc.

Phone: (209) 322-1815
Email: [email protected]
Bao Cha, Assistant Engineer
Black Water Consulting Engineers, Inc.

Phone: (209) 694-4766
Email: [email protected]

Page 273 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
i

TABLE OF CONTENTS
1 UWMP Introduction and Lay Description..........................................................................................1-1

1.1 Background and Purpose ...........................................................................................................1-1

1.2 Previous Urban Water Management Plan.................................................................................1-1

1.3 Urban Water Management Planning and the California Water Code.......................................1-1

1.3.1 Urban Water Management Planning Act of 1983 .............................................................1-2

1.3.2 Applicable Changes to the Water Code since 2015 UWMPs.............................................1-2

1.4 UWMP Organization ..................................................................................................................1-3

1.5 Lay Description...........................................................................................................................1-4 2 Plan Preparation ................................................................................................................................2-1

2.1 Basis for Preparing a Plan ..........................................................................................................2-1

2.1.1 Public Water Systems.........................................................................................................2-1

2.2 Individual Planning and Compliance..........................................................................................2-2

2.3 Fiscal or Calendar Year and Units of Measure...........................................................................2-3

2.4 Coordination and Outreach .......................................................................................................2-4

2.4.1 Wholesale and Retail Coordination ...................................................................................2-4

2.4.2 Coordination with Other Agencies and the Community....................................................2-5

2.4.3 Notice to Cities and Counties.............................................................................................2-5 3 System Description ............................................................................................................................3-1

3.1 General Description ...................................................................................................................3-1

3.2 Service Area Boundary Maps.....................................................................................................3-1

3.3 Service Area Climate ..................................................................................................................3-4

3.4 Service Area Population and Demographics..............................................................................3-5

3.4.1 Service Area Population.....................................................................................................3-5

3.4.2 Other Social, Economic, and Demographic Factors...........................................................3-6

3.5 Land Uses within Service Area ...................................................................................................3-7 4 Water Use Characterization...............................................................................................................4-1

4.1 Non-Potable versus Potable Water Use ....................................................................................4-1

4.2 Past, Current, and Projected Water Use by Sector....................................................................4-1

4.2.1 Water Use Sectors Listed in Water Code...........................................................................4-2

4.2.2 Water Use Sectors in Addition to Those Listed in Water Code .........................................4-2

4.2.3 Past Water Use...................................................................................................................4-2

4.2.4 Distribution System Water Loss.........................................................................................4-3

4.2.5 Current Water Use.............................................................................................................4-4

4.2.6 Projected Water Use..........................................................................................................4-6

4.2.7 Characteristic Five-Year Water Use ...................................................................................4-8

4.3 Water Use for Lower Income Households.................................................................................4-9

4.4 Climate Change Considerations...............................................................................................4-10 5 SB X7-7 Baselines, Targets, and 2020 Compliance ............................................................................5-1

5.1 Baseline and Target Calculations for 2020 UWMPs...................................................................5-1

5.2 Methods for Calculating Population and Gross Water Use .......................................................5-2

5.2.1 Service Area Population.....................................................................................................5-2

5.3 Gross Water Use ........................................................................................................................5-2

Page 274 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
ii

5.4 2020 Compliance Daily Per-Capita Water Use (GPCD) ..............................................................5-3

5.5 Regional Alliance........................................................................................................................5-4 6 Water Supply Characterization..........................................................................................................6-1

6.1 Narrative Sections for Supplier’s UWMP Water Supply Characterization.................................6-1

6.1.1 Purchased or Imported Water...........................................................................................6-1

6.1.2 Groundwater......................................................................................................................6-2

6.1.2.1 Groundwater Sustainability Plan.....................................................................6-3

6.1.2.2 Groundwater Basin Description ......................................................................6-3

6.1.2.3 Past Five Years.................................................................................................6-4

6.1.3 Surface Water ....................................................................................................................6-5

6.1.4 Stormwater........................................................................................................................6-5

6.1.5 Wastewater and Recycled Water ......................................................................................6-6

6.1.5.1 Recycled Water Coordination..........................................................................6-6

6.1.5.2 Wastewater Collection, Treatment, and Disposal...........................................6-7

6.1.5.3 Recycled Water System Description................................................................6-9

6.1.5.4 Potential, Current, and Projected Recycled Water Uses.................................6-9

6.1.5.5 Actions to Encourage and Optimize Future Recycled Water Use .................6-11

6.1.6 Desalinated Water Opportunities....................................................................................6-12

6.1.7 Water Exchanges and Transfers.......................................................................................6-12

6.1.8 Future Water Projects......................................................................................................6-13

6.1.9 Summary of Existing and Planned Sources of Water.......................................................6-14

6.1.9.1 Description of Supplies..................................................................................6-14

6.1.9.2 Quantification of Supplies.............................................................................6-14

6.1.10 Special Conditions............................................................................................................6-15

6.2 Energy Use ...............................................................................................................................6-16 7 Water Service Reliability and Drought Risk Assessment ...................................................................7-1

7.1 Water Service Reliability Assessment........................................................................................7-1

7.1.1 Service Reliability – Constraints on Water Sources...........................................................7-1

7.1.1.1 Legal.................................................................................................................7-2

7.1.1.2 Environmental .................................................................................................7-2

7.1.1.3 Water Quality ..................................................................................................7-2

7.1.1.4 Climatic Factors ...............................................................................................7-2

7.1.2 Service Reliability – Year Type Characterization................................................................7-2

7.1.3 Service Reliability – Supply and Demand Comparison.......................................................7-4

7.1.3.1 Water Service Reliability – Normal Year..........................................................7-4

7.1.3.2 Water Service Reliability – Single Dry Year......................................................7-4

7.1.3.3 Water Service Reliability – Five-Consecutive-Year Drought............................7-5

7.1.4 Description of Management Tools and Options................................................................7-7

7.2 Drought Risk Assessment...........................................................................................................7-7

7.2.1 DRA Data, Methods, and Basis for Water Shortage Conditions........................................7-8

7.2.2 DRA Water Source Reliability.............................................................................................7-8

7.2.3 DRA Total Water Supply and Use Comparison ..................................................................7-8 8 Water Shortage Contingency Plan.....................................................................................................8-1 9 Demand Management Measures......................................................................................................9-1

9.1 Existing Demand Management Measures for Retail Suppliers..................................................9-1

Page 275 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
iii

9.1.1 Water Waste Prohibition Ordinances................................................................................9-1

9.1.2 Metering.............................................................................................................................9-2

9.1.3 Conservation Pricing ..........................................................................................................9-2

9.1.4 Public Education and Outreach..........................................................................................9-2

9.1.4.1 Public Information Programs...........................................................................9-2

9.1.4.2 School Education .............................................................................................9-3

9.1.5 Programs to Assess and Manage Distribution System Real Loss.......................................9-3

9.1.6 Water Conservation Program Coordination and Staffing Support....................................9-3

9.1.7 Other Demand Management Measures............................................................................9-3

9.1.7.1 Water Survey Programs...................................................................................9-3

9.1.7.2 Residential Plumbing Retrofit..........................................................................9-3

9.1.7.3 Landscape Conservation Programs and Incentives.........................................9-4

9.1.7.4 High-Efficiency Washing Machine Rebate Program........................................9-4

9.1.7.5 Conservation Programs for Commercial, Industrial, and Institutional............9-4

9.2 Reporting Implementation ........................................................................................................9-5

9.2.1 Implementation over the Past Five Years..........................................................................9-5

9.2.2 Implementation to Achieve Water Use Targets ................................................................9-5 10 Plan Adoption, Submittal, and Implementation..............................................................................10-1

10.1 Inclusion of All 2020 Data ........................................................................................................10-1

10.2 Notice of Public Hearing ..........................................................................................................10-1

10.2.1 Notice to Cities and Counties...........................................................................................10-1

10.2.2 Notice to the Public..........................................................................................................10-3

10.3 Public Hearing and Adoption ...................................................................................................10-3

10.3.1 Public Hearing ..................................................................................................................10-3

10.3.2 Adoption ..........................................................................................................................10-4

10.4 Plan Submittal..........................................................................................................................10-4

10.4.1 Submitting a UWMP and Water Shortage Contingency Plan to DWR.............................10-4

10.4.2 Electronic Data Submittal ................................................................................................10-4

10.4.3 Submitting a UWMP, including WSCP, to the California State Library ............................10-4

10.4.4 Submitting a UWMP to Cities and Counties ....................................................................10-5

10.5 Public Availability .....................................................................................................................10-5

10.6 Notification to Public Utilities Commission .............................................................................10-5

10.7 Amending an Adopted UWMP or Water Shortage Contingency Plan.....................................10-5

10.7.1 Amending a UWMP..........................................................................................................10-5

10.7.2 Amending a Water Shortage Contingency Plan...............................................................10-6 11 References.......................................................................................................................................11-1

Page 276 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
iv

LIST OF TABLES
Table 1-1 – Applicable Changes to the CWC Since 2015 ...........................................................................1-3 Table 2-1 – Public Water Systems (DWR Table 2-1) ..................................................................................2-2 Table 2-2 – Plan Identification Type (DWR Table 2-2)...............................................................................2-2 Table 2-3 – Supplier Identification (DWR Table 2-3) .................................................................................2-3 Table 2-4 – Water Supplier Information Exchange (DWR Table 2-4) ........................................................2-4 Table 2-5 – UWMP Coordination...............................................................................................................2-6 Table 3-1 – City of Atwater Climate Data ..................................................................................................3-5 Table 3-2 – Population – Current and Projected (DWR Table 3-1)............................................................3-6 Table 3-3 – Demographic Factors..............................................................................................................3-6 Table 4-1 – Past Water Use (2016-2019)...................................................................................................4-3 Table 4-2 – Last Five Years of Water Loss Audit Reporting (DWR Table 4-4)............................................4-4 Table 4-3 – Demands for Potable and Non-Potable Water – Actual (DWR Table 4-1)..............................4-5 Table 4-4 – Use for Potable and Non-Potable Water – Projected (DWR Table 4-2)..................................4-7 Table 4-5 – Total Water Use (Potable and Non-Potable) (DWR Table 4-3)...............................................4-7 Table 4-6 – Characteristic Five-Year Water Use ........................................................................................4-8 Table 4-7 – City of Atwater Lower Income Household Water Demands...................................................4-9 Table 4-8 – Inclusion in Water Use Projections (DWR Table 4‑5)............................................................4-10 Table 5-1 – Baselines and Targets Summary from SB X7-7 Verification Form (DWR Table 5-1)...............5-1 Table 5-2 – 2020 Compliance (DWR Table 5-2) .........................................................................................5-3 Table 6-1 – Groundwater Volume Pumped (DWR Table 6-1)....................................................................6-4 Table 6-2 – Wastewater Collected within Service Area in 2020 (DWR Table 6-2) ....................................6-8 Table 6-3 – Wastewater Treatment and Discharge within Service Area in 2020 (DWR Table 6-3)...........6-8 Table 6-4 – Current and Projected Recycled Water Direct Beneficial Uses Within Service Area (DWR Table 6-4 R)........................................................................................................................................................6-10 Table 6-5 – 2015 UWMP Recycled Water Use Projection Compared to 2020 Actual (DWR Table 6-5 R)...6- 11 Table 6-6 – Methods to Expand Future Recycled Water Use (DWR Table 6-6).......................................6-12 Table 6-7 – Expected Future Water Supply Projects or Program (DWR Table 6-7).................................6-13 Table 6-8 – Water Supplies – Actual (DWR Table 6-8).............................................................................6-15 Table 6-9 – Water Supplies – Projected (DWR Table 6-9) .......................................................................6-15 Table 7-1 – Basis of Water Year Data (DWR Table 7-1) .............................................................................7-3 Table 7-2 – Normal Year Supply and Demand Comparison (DWR Table 7-2) ...........................................7-4 Table 7-3 – Single Dry Year Supply and Demand Comparison (DWR Table 7-3) .......................................7-5 Table 7-4 – Multiple Dry-Year Supply and Demand Comparison (DWR Table 7-4)...................................7-6 Table 7-5 – Five-Year Drought Risk Assessment Tables (DWR Table 7-5) .................................................7-9 Table 10-1 – Notification to Cities and Counties (DWR Table 10-1)........................................................10-2

Page 277 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
v

LIST OF FIGURES
Figure 3-1 – Service Area Boundary Map ..................................................................................................3-2 Figure 3-2 – Existing Water System Map...................................................................................................3-3 Figure 3-3 – General Plan Land Use ...........................................................................................................3-8

APPENDICES
Appendix A – DWR UWMP Tables
Appendix B – DWR UWMP Checklist
Appendix C – Notice of Preparation and Outreach Documents Appendix D – Water Loss Audits
Appendix E – SB X7-7 2015 Verification Form and 2020 Compliance Form Appendix F – Energy Use Tables
Appendix G – Consumer Confidence Reports
Appendix H – Water Shortage Contingency Plan
Appendix I – Water Rate Schedule
Appendix J – UWMP Adoption Resolution

Page 278 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
vi

LIST OF ACRONYMS AND ABBREVIATIONS
AB Assembly Bill
AF Acre feet
AFY Acre feet per year
Black Water Black Water Consulting Engineers, Inc.

BMP Best Management Practice
CCR Consumer Confidence Report
CII Commercial, Industrial, and Institutional sector
CIMIS California Irrigation Management Information System City City of Atwater
County Merced County
CUWCC California Urban Water Conservation Council
CWC California Water Code
DBCP 1,2-Dibromo-3-Chloropropane
DMM Demand Management Measures
DOF California Department of Finance
DRA Drought Risk Assessment
DWR California Department of Water Resources
EDB Ethylene Dibromide
ETo Evapotranspiration
gpcd gallons per capita per day
gpm gallons per minute
GSA Groundwater Sustainability Agency
GSP Groundwater Sustainability Plan
HCF Hundred Cubic Feet
LAA Land Application Areas
Legislature State of California Legislature
MCL Maximum Contaminant Level
MG Million gallons
mgd Million gallons per day
MID Merced Irrigation District
MIRWMP Merced Integrated Regional Water Management Plan Update MIUGSA Merced Irrigation-Urban GSA
MOU Memorandum of Understanding
PCE Perchloroethylene
SB Senate Bill
SB X7-7 Water Conservation Bill of 2009
SGMA Sustainable Groundwater Management Act
SOI Sphere of influence
State Water Board State Water Resources Control Board
SUDP Specific Urban Development Plan
SWTP Surface Water Treatment Plant
TCP 1,2,3-Trichloropropane
USFWS United States Fish and Wildlife Service
UWMP Urban Water Management Plan

Page 279 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
vii
UWMP Guidebook 2020 Urban Water Management Plan Guidebook for Urban Water Suppliers UWMPA Urban Water Management Plan Act
Water Master Plan Water Master Plan Update
WMA Wildlife Management Area
WSCP Water Shortage Contingency Plan
WWSD Winton Water and Sanitary District
WWTP Wastewater Treatment Plant

Page 280 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
1-1
1 UWMP Introduction and Lay Description

1.1 Background and Purpose
Legal Requirements:

CWC Section 10615:
“Plan” means an urban water management plan prepared pursuant to this part. A plan shall describe and evaluate sources of supply, reasonable and practical efficient uses, reclamation and demand management activities. The components of the plan may vary according to an individual community or area's characteristics and its capabilities to efficiently use and conserve water. The plan shall address measures for residential, commercial, governmental, and industrial water demand management as set forth in Article 2 (commencing with Section 10630) of Chapter 3. In addition, a strategy and time schedule for implementation shall be included in the plan.

The California Water Code (CWC) requires urban water suppliers within the state to prepare and adopt urban water management plans (UWMPs) for submission to the California Department of Water Resources (DWR). The UWMPs, which must be filed every five years, must satisfy the requirements of the Urban Water Management Planning Act (UWMPA) of 1983 including amendments that have been made to the Act and other applicable regulations. The UWMPA requires urban water suppliers servicing 3,000 or more connections or supplying more than 3,000 acre-feet (AF) of water annually, to prepare an UWMP.

The purpose of the UWMP is to maintain efficient use of urban water supplies, continue to promote conservation programs and policies, ensure that sufficient water supplies are available for future beneficial use, and provide a mechanism for response during water drought conditions. This plan, which was prepared in compliance with the CWC, and as set forth in the 2020 Urban Water Management Plan Guidebook for Urban Water Suppliers (May 2021) established by DWR (UWMP Guidebook), constitutes the City of Atwater (City) 2020 UWMP. This 2020 UWMP was prepared in compliance with the UWMPA and the Water Conservation Bill of 2009 (Senate Bill [SB] X7-7) by Black Water Consulting Engineers, Inc. (Black Water) and the City.

1.2 Previous Urban Water Management Plan
The City previously updated their 2015 UWMP in March 2019. Following adoption, the 2015 UWMP was submitted to and approved by DWR. This 2020 UWMP serves as an update to the 2015 UWMP and complies with all new UWMP requirements and regulations.

1.3 Urban Water Management Planning and the California Water Code This section summarizes the CWC sections that are applicable to UWMPs.

Page 281 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
1-2

1.3.1 Urban Water Management Planning Act of 1983
In 1983, State Assembly Bill (AB) 797 modified the CWC Division 6 by creating the UWMPA. Several amendments to the original UWMPA, which were introduced since 1983, have increased the data requirements and planning elements to be included in UWMPs. Initial amendments to the UWMPA required that total projected water use be compared to water supply sources over the next 20 years, in 5-year increments. Recent DWR guidelines also suggest projecting through a 25-year planning horizon to maintain a 20-year timeframe until the next UWMP update has been completed. This is merely a guideline and not a requirement of the UWMPA. Therefore, the use of a 25-year planning horizon as opposed to a 20-year planning horizon is left up to the discretion of the agency. The City has opted to use a 20-year planning horizon for the purposes of this UWMP.

1.3.2 Applicable Changes to the Water Code since 2015 UWMPs Since the UWMPA was passed, the CWC has undergone significant expansion and revision since the 2015 UWMP was prepared. Prolonged droughts, groundwater overdraft, regulatory revisions, and changing climatic conditions not only affect each supplier’s water reliability determinations, but also the broad picture of statewide water reliability overseen by DWR, the State Water Resources Control Board (State Water Board), and the State of California Legislature (Legislature). Accordingly, the UWMPA has grown to address changing conditions. Applicable changes to the CWC since the completion of the City’s 2015 UWMP are summarized in Table 1-1.

Page 282 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
1-3
Table 1-1 – Applicable Changes to the CWC Since 2015
Topic
CWC
Sections
Legislative
Bill Summary
Five Consecutive DryYear Water Reliability
Assessment
10635(a)
and (b)
SB 606, 2019 The Legislature modified the dry-year water reliability planning from a “multiyear” time
period to a “drought lasting five consecutive
water years” designation.

Drought Risk
Assessment
10635(b) SB 606, 2019 The Drought Risk Assessment (DRA) requires a supplier to assess water supply reliability over
a five-year period from 2021 to 2025.

Seismic Risk 10632.5 SB 664, 2016 Requires the UWMP to address seismic risk to various water system facilities and have a
mitigation plan.

Energy Use 10631.2(a) SB 606, 2018 Requires suppliers to include readily obtainable information on estimated amounts
of energy use for their water supply
extraction, treatment, distribution, storage,
conveyance, and other water uses.

Water Loss Reporting
for Five Years
10631(d) AB 1414,
2019
Requires inclusion of the past five years of
water loss audit reports in UWMPs.

Water Shortage
Contingency Plan
(WSCP)
10632 SB 606, 2019 Suppliers are required to prepare and adopt a WSCP.

Groundwater Supplies
Coordination
10631 AB 1414,
2019
Requires UWMPs to be consistent with
Groundwater Sustainability Plans (GSPs)
Lay Description 10630.5 SB 606, 2019 Requires inclusion of a simple lay description of how much water the agency has on a
reliable basis, how much it needs for the
foreseeable future, what the agency’s strategy
is for meeting its water needs, the challenges
facing the agency, and any other information
necessary to provide a general understanding
of the agency’s plan.

1.4 UWMP Organization
This 2020 UWMP contains the appropriate sections and tables required per the UWMPA and has been prepared based on guidance provided by the DWR 2020 UWMP Guidebook. The required tables are included in the relevant sections and in Appendix A.

DWR’s UWMP Checklist, as provided in the DWR 2020 UWMP Guidebook, has been completed to demonstrate the UWMP’s compliance with applicable requirements. A copy of the completed checklist is included in Appendix B. This plan is organized according to the recommended format provided in the DWR’s 2020 UWMP Guidebook. The UWMP contains ten chapters, followed by appendices that provide supporting documentation for the information presented in the plan. The chapters are outlined below:

Page 283 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
1-4
• Chapter 1 - UWMP Introduction and Lay Description: This chapter provides background information for the 2020 UWMP and provides a description of the purpose of the plan. • Chapter 2 - Plan Preparation: This chapter includes information on the development of the 2020 UWMP and efforts in coordination and outreach.
• Chapter 3 - System Description: This chapter describes the service area, population, and climate; presents an overview of the City’s water distribution system; and describes the City's organizational structure and history.
• Chapter 4 - Water Use Characterization: This chapter describes and quantifies the current and projected water uses within the City’s service area.
• Chapter 5 - SB X7-7 Baseline and Targets, and 2020 Compliance: This chapter describes the methods for calculating baseline and target water use consumption in the City. It also includes a calculation of the City’s 2020 water use and determination of compliance with the 2020 target water use.
• Chapter 6 - Water Supply Characterization: This chapter describes the current and projected sources of water available to the City. A description of potential recycled water use and supply availability is also included in this chapter.
• Chapter 7 - Water Service Reliability and Drought Risk Assessment: This chapter describes the reliability of the City’s current supply and evaluates the reliability 20 years out, including normal, single-dry years, and five consecutive dry years.
• Chapter 8 - Water Shortage Contingency Plan: This chapter references the City’s Water Shortage Contingency Plan (WSCP) which is provided as an appendix. • Chapter 9 - Demand Management Measures: This chapter describes the City's efforts to promote conservation, reduce water demand, and describes the City's demand management measures. • Chapter 10 - Plan Adoption, Submittal, and Implementation: This chapter describes the steps taken to adopt and submit the 2020 UWMP and make it publicly available. This chapter will also describe the City's plan to implement the UWMP.

1.5 Lay Description
Legal Requirements:

CWC Section 10630.5:

Each plan shall include a simple lay description of how much water the agency has on a reliable basis, how much it needs for the foreseeable future, what the agency’s strategy is for meeting its water needs, the challenges facing the agency, and any other information necessary to provide a general understanding of the agency’s plan.

The UWMP describes the City’s water system, characterizes water use, describes the water supply sources for the City, and analyzes the reliability of the City’s water service for normal, dry, and 5-year drought conditions for the next 20 years. To further improve the reliability of the City’s water system, the WSCP identifies strategies to implement during water shortages and describes procedures for identifying the potential of a water shortage in the current year.

The City water system has nine groundwater wells with a total well capacity of approximately 15,000 gallons per minute (gpm). In 2020, the City supplied 8,559 AF of potable water. Potable water demands are projected to increase to 11,838 AF by 2040 due to increases in the City population. The City’s water

Page 284 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
1-5
supply is projected to sufficiently meet expected demands through 2040 through the installation of additional groundwater wells.

The Merced groundwater basin, which is currently the City’s only water source, is a high priority basin and is critically overdrafted. The addition of groundwater wells, groundwater treatment systems, continued implementation of water conservation measures, and participation in regional activities to address the sustainable management of the groundwater basin are critical components for the long-term reliability of the City’s water system.

Page 285 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
2-1
2 Plan Preparation
This chapter presents information on the development of the 2020 UWMP, including coordination and outreach efforts.

2.1 Basis for Preparing a Plan
Legal Requirements:

CWC Section 10617:
“Urban water supplier” means a supplier, either publicly or privately owned, providing water for municipal purposes either directly or indirectly to more than 3,000 customers or supplying more than 3,000 acre-feet of water annually. An urban water supplier includes a supplier or contractor for water, regardless of the basis of right, which distributes or sells for ultimate resale to customers. This part applies only to water supplied from public water systems.

CWC Section 10620:
(b) Every person that becomes an urban water supplier shall adopt an urban water management plan within one year after it has become an urban water supplier.

CWC Section 10621:
(a) Each urban water supplier shall update its plan 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.

2.1.1 Public Water Systems
The CWC defines an urban water supplier as “a water supplier, either publicly or privately owned, that directly provides potable municipal water to more than 3,000 end users or supplies more than 3,000 acrefeet (AF) of potable water annually at retail for municipal purposes.” Table 2-1 (DWR Table 2-1) documents the number of municipal connections and the volume of water supplied in 2020. The City is considered an urban retail water supplier.

Page 286 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
2-2
Table 2-1 – Public Water Systems (DWR Table 2-1)

2.2 Individual Planning and Compliance
Water agencies are given the option to develop UWMPs individually or collectively as a regional group.

While efforts to prepare the UWMP were coordinated with appropriate agencies, this UWMP was developed for the City service area only, and the City is not participating in a Regional UWMP (Table 2-2 (DWR Table 2-2)).

Table 2-2 – Plan Identification Type (DWR Table 2-2)
Public Water System
Number
Public Water System
Name
Number of Municipal
Connections 2020
Volume of
Water Supplied
2020 *
CA24100001 City of Atwater 8,407 8,559
8,407 8,559
Submittal Table 2-1 Retail Only: Public Water Systems
NOTES: Units of measure is AF. Source for number of municipal connections 2020 is State Waterboard 2020 Electronic Annual Report. Source for volume of water supplied 2020 is monthly water production data provided by City.

TOTAL
Add additional rows as needed
* Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Water Supplier is also a
member of a RUWMP
Water Supplier is also a
member of a Regional Alliance
Regional Urban Water Management
Plan (RUWMP)
Submittal Table 2-2: Plan Identification
NOTES:

Individual UWMP
Name of RUWMP or Regional Alliance
if applicable
(select from drop down list)
Select
Only
One
Type of Plan

Page 287 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
2-3

2.3 Fiscal or Calendar Year and Units of Measure
Legal Requirements:

CWC Section 10608.20:
(a)(1) Urban retail water suppliers…may determine the targets on a fiscal year or calendar year basis.

The City’s 2020 UWMP has been prepared on a calendar year basis and includes planning data for the complete year of 2020. The City’s reporting of water volumes in this 2020 UWMP is reported in acre feet.

Table 2-3 (DWR Table 2-3) summarizes the City’s reporting methods for this 2020 UWMP.

Table 2-3 – Supplier Identification (DWR Table 2-3)
Supplier is a wholesaler
Supplier is a retailer
UWMP Tables are in calendar years
UWMP Tables are in fiscal years
Unit AF
NOTES:

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 drop down)
* Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 288 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
2-4

2.4 Coordination and Outreach
Legal Requirements:

CWC Section 10631:
(h) An urban water supplier that relies upon a wholesale agency for a source of water shall provide the wholesale agency with water use projections from that agency for that source of water in five-year increments to 20 years or as far as data is available. The wholesale agency shall provide information to the urban water supplier for inclusion in the urban water supplier’s plan that identifies and quantifies, to the extent practicable, the existing and planned sources of water as required by subdivision (b), available from the wholesale agency to the urban water supplier over the same five-year increments, and during various water-year types in accordance with subdivision (f). An urban water supplier may rely upon water supply information provided by the wholesale agency in fulfilling the plan informational requirements of subdivisions (b) and (f).

The UWMPA requires that the UWMP identify the water agency’s coordination with appropriate nearby agencies. While preparing the 2020 UWMP, the City coordinated its efforts with relevant agencies to ensure that the data and issues are presented accurately.

2.4.1 Wholesale and Retail Coordination
The City does not receive wholesale water, nor does it plan to in the future (Table 2-4 (DWR Table 2-4)).

Table 2-4 – Water Supplier Information Exchange (DWR Table 2-4) Submittal Table 2-4 Retail: Water Supplier Information Exchange The retail Supplier has informed the following wholesale supplier(s) of projected water use in accordance with Water Code Section 10631.

Wholesale Water Supplier Name
Add additional rows as needed
N/A
NOTES:

Page 289 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
2-5

2.4.2 Coordination with Other Agencies and the Community Legal Requirements:

CWC Section 10620:
(d)(3) Each urban water supplier shall coordinate the preparation of its plan with other appropriate agencies in the area, including other water suppliers that share a common source, water management agencies, and relevant public agencies, to the extent practicable.

CWC Section 10642:

Each urban water supplier shall encourage the 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...

The City Public Works Department coordinated the development of the 2020 UWMP with various City departments, including solicitation of input and data from the various departments during the UWMP preparation. Draft copies of the UWMP were also available to department managers for comment and revision prior to adoption. A copy of the City’s 2020 UWMP will be submitted to the County of Merced within 60 days of submission to DWR. The City is also a member of Merced County Area Groundwater Pool Interests (MAGPI), which is an association of Merced County water purveyors responsible for developing technical data and management strategies to ensure the health of the groundwater basin.

The City has encouraged community participation in the preparation of the UWMP. A public hearing will be held for review and comment on the draft UWMP before City Council approval. Additionally, copies of the draft UWMP will be posted on the City’s website homepage.

2.4.3 Notice to Cities and Counties
Legal Requirements:

CWC Section 10621(b):

Every urban water supplier required to prepare a plan pursuant to this part shall, at least 60 days before the public hearing on the plan required by Section 10642, notify any city or county within which the supplier provides water supplies that the urban water supplier will be reviewing the plan and considering amendments or changes to the plan.

The City also provided formal written notification to Merced County, Merced Irrigation District (MID), and the other agencies listed in Table 2-5 that the City’s UWMP was being updated. In accordance with the UWMPA, notification was provided at least 60 days prior to the public hearing of the plan. Access to electronic copies of the final UWMP will be provided to these agencies no later than 30 days after its submission to the DWR. Appendix C contains copies of the outreach documents.

Page 290 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
2-6
Table 2-5 – UWMP Coordination
Agencies
County of Merced
Merced Irrigation District
Merced County Farm Bureau
Atwater Chamber of Commerce
Atwater Elementary School District
Merced Unified High School District

Page 291 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
3-1
3 System Description
The UWMPA requires that the UWMP include a description of the water purveyor’s service area and various aspects of the area served including climate, population, and other demographic factors. Unless otherwise noted, this UWMP uses the term “service area” to refer to the areas which the City provides potable water service.

3.1 General Description
Legal Requirements:

CWC Section 10631:
(a) Describe the service area of the supplier, including current and projected population, climate, and other social, economic, and demographic factors affecting the supplier’s water management planning.

The projected population estimates shall be based upon data from the state, regional, or local service agency population projections within the service area of the urban water supplier and shall be in fiveyear increments to 20 years or as far as data is available. The description shall include the current and projected land uses within the existing or anticipated service area affecting the supplier’s water management planning. Urban water suppliers shall coordinate with local or regional land use authorities to determine the most appropriate land use information, including, where appropriate, land use information obtained from local or regional land use authorities, as developed pursuant to Article 5 (commencing with Section 65300) of Chapter 3 of Division 1 of Title 7 of the Government Code.

Atwater is located within Merced County in the San Joaquin Valley of Central California. The City was incorporated in 1922 and currently spans over 6 square miles. The City is located approximately 8 miles northwest of Merced, 105 miles south of Sacramento, and 65 miles north of Fresno. The City is accessible via the Southern/Union Pacific Railroad and the Burlington Santa Fe Railroad. State Highway 99 also runs through the southwest portion of the City, while Interstate 5 is located 40 miles west.

The topography of Atwater is generally flat as it lies within the San Joaquin Valley, which is approximately 225 miles long and 50 miles wide. The Sierra Nevada mountain range is situated 20 miles east of the City, and 30 miles to the west is the Coastal Mountain range.

The majority of the land in the City of Atwater and surrounding area is for agricultural use. Over half of the acreage is designated for agriculture, reserve areas, and related uses. Most of the remaining land is for low-density residential areas. The two major commercial areas are centered on the Union Pacific railway and Highway 99.

3.2 Service Area Boundary Maps
There are two basic boundaries which define the City in relation to the surrounding area. These boundaries include the City limits and the Buildout Planning Area boundary. Figure 3-1 provides a location map of the service area. Figure 3-2 shows a map of the existing water system. Figure 3-2 will also be submitted to DWR in ArcGIS format with the 2020 UWMP.

Page 292 of 824 ends

140

SANTA FE
FO
X
OLIVE
BELL
99 HULL
BU
H
A
C
H
C
SUNSET
WIN
T
O
N
S
H
AFFER
ASHBY
ALMOND
G
U
R
R
VINE
WALNUT
BER
T
C
R
A
NE

ELLIOTT
APPLEG
ATE

LIBERTY
MORAN
ONE
AMMO

ATWATER JORDAN
FIR

BELLEVUE

LONGVIEW

LANDRAM
C
RES
SEY
TAHOE
ROSE
S

TEINBER
G

WESTSIDE

FRUITLAND
CENT
R
AL
G
R
O
VE

FLEMING
FR
ANKLIN

PERIMETER
T
H
O
R
N
T
O
N
ELK
LADINO

HARDSTAND
GIA
N
NINI
T
RIN
D
A
DE
VAUGHN
S
TEIN

WHITE CRANE
HERROD
K
T
C
YPRES
S
E
HO
SPITAL

GREEN SANDS
TWO
FER
N

WALLACE
A
U
G
U
S
TA

CARDELLA
S
WAN
CONVOY
G

DAN WARD
JOSIE
R
O
GER
S

BELCHER

MC SWAIN
C
REST

LUCILLE
JULIA
HAILEY
ESSEX

INDUSTRY

G BI BS
EPPS
LOPES
FAILTE
FUEL
99 PERIMETER
ROSE

BELCHER
FR
A
N
KLIN
140
C
RES
SEY

BELLEVUE
ROSE
WALNUT
VINE
CEN
T
R
AL
MORAN
CEN
T
R
AL
C
RES
SEY
Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community

CITY OF ATWATER UWMP

SERVICE AREA BOUNDARY MAP
Figure 3-1
0 0.2 0.4 0.8 1.2 1.6
4 Miles
LEGEND
City Limits
Buildout Planning Area Boundary

Page 293 of 824 ends

TUTU
*#
*#
*#
*#
*#
*#
*#
*#
V#
!(
FO
X
A
99 SANTA FE
B
C

ATWATER
VINE
S
H
AFFER
W
NI T
O
N
BU
H
A
C
H
ELM
ONE

JUNIPER
GUR
R
HULL
OLIVE
BELL
FIR
FIRST

BROADWAY
HIGH
SUNSET
CEDAR
BER
T
C
R
A
NE

GERTRUDE
APRON
GROVE

HARDSTAND
F
APPLEG
ATE

FLEMING

ATWATER JORDAN
E
PIRO

CAMELLIA
HO
SPITAL
FAY
T
RIN
D
A
DE

GREEN SANDS

GIANNINI
TWO
AMMO

WALLACE
LADINO
HERROD

PERIMETER
FAIR
WAY
A
U
G
U
S
TA
CONVOY

ZEPPELIN
G
PALM
CASTLE
LINDEN

STATION
DECOY
O
R
C
H
A
R
D PA
R
K
IVY

SHUTTLE

FEDERAL
C
YPRES
S
G
A
R
DEN

PROGRESS

BELLEVUE
C
REST

FRUITLAND
D

INDUSTRY

AVIATOR

AVENUE TWO
EPPS
R
AINBO
W
DORIS
KIM
H
A
R
B
O
R
KELLY

JETLIFT

BRADSHAW
BOBBIE

MONARCH
FIFT
H

CALGARY
WILLOW
LEA

LIBERTY

SYCAMORE
BEECH
TANKER
PEACE
HEAT
HER
GLEN

SECRETARIAT

LAKE VIEW

SANDPIPER

SANTA CRUZ
ASHBY
RODEO
FUEL

MERIDIA
N
99 VINE
C
A
S
TLE

BELLEVUE
TWO
B

BELLEVUE
Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community

CITY OF ATWATER UWMP

EXISTING WATER SYSTEM MAP
Figure 3-2
0 0.1 0.2 0.4 0.6 0.8
4 Miles
LEGEND
City Limits
Current Service Area
Water Pipeline
TU Storage Tank
*# Active Well
V# Drilled Well (No Equip.)
!( Reservoir

Page 294 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
3-4

3.3 Service Area Climate
Legal Requirements:

CWC Section 10631(a):

A plan shall… Describe the service area of the supplier, including … climate… CWC Section 10630:

It is the intention of the Legislature, in enacting this part, to permit levels of water management planning… while accounting for impacts of climate change.

Atwater’s climate consists of dry, mild winters and hot summers. Up to 90 percent of the City’s annual precipitation occurs from November to April; therefore, rainfall during the summer is rare and very light.

Additionally, snow is also a very rare occurrence. More than 80 percent of days in Atwater are sunny, except for during the winter (November-February). During the winter, there are fewer sunny days due to fog and short storm events.

The Coastal Mountain range to the west blocks any marine weather effects, which leads to very high temperatures during the summer months. The normal daily maximum temperatures are in the high 90s for July with many days over 100 degrees. The relative humidity is also around 15 percent and can occasionally drop to as low as 8 percent.

The winter temperatures are usually mild with infrequent cold spells that drop the temperature below freezing. Heavy frosts occur between late November and early March. During this time, the City also experiences humidity as high as 90 percent during the early morning hours.

Wind flow in the San Joaquin Valley is generally from the northwest. During the warmest months, this northwest wind usually increases during the evenings and helps to lower temperatures. This leads to a large temperature variation of about 35 degrees from daytime to nighttime during the summer months.

Table 3-1 presents the temperature, precipitation, and evapotranspiration information for the Atwater area. The temperature and precipitation data are from the Western Regional Climate Center for Merced California, which is approximately 15 miles southeast of Atwater. The evapotranspiration data are from the California Irrigation Management Information System for Merced, California, which is approximately 15 miles southeast of Atwater.

Page 295 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
3-5
Table 3-1 – City of Atwater Climate Data
Monthly Average Monthly Average Standard Monthly
Temperature (F)(a) Precipitation Average ETo
Month Maximum Minimum (inches)(a) (inches)(b)
January 54.9 36.0 2.46 1.24
February 61.6 38.7 2.17 2.04
March 67.2 41.2 1.96 3.63
April 74.3 44.9 1.09 5.02
May 82.6 50.6 0.44 6.97
June 90.8 56.4 0.10 7.98
July 97.1 60.9 0.01 8.47
August 95.3 58.9 0.02 7.57
September 90.0 54.8 0.15 5.56
October 79.8 47.2 0.60 3.60
November 66.2 39.6 1.37 1.80
December 55.7 35.6 1.89 1.08
Annual Average 76.3 47.1 1.02 4.58
Total - - 12.26 54.96
(a) Source: WRCC: wrcc.dri.edu, Merced AP, California (045532), Monthly Climate Summary, June 1899 - June 2016. (b) Source: CIMIS Website: www.cimis.water.ca.gov, Station 148 Merced, California, Monthly Average ETo Report, Printed on June 2021.

3.4 Service Area Population and Demographics

3.4.1 Service Area Population
Legal Requirements:

CWC Section 10631(a):

Describe the service area of the supplier, including current and projected population …The projected population estimates shall be based upon data from the state, regional, or local service agency population projections within the service area of the urban water supplier and shall be in five-year increments to 20 years or as far as data is available.

According to the California Department of Finance (DOF), the City’s population for the year 2020 was 31,648. Table 3-2 (DWR Table 3-1) shows the existing and forecasted population for the service area, which will be used to forecast water requirements for the City. The forecasted population for the City is based on a growth rate of 7.1% every five years.

Page 296 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
3-6
Table 3-2 – Population – Current and Projected (DWR Table 3-1)

3.4.2 Other Social, Economic, and Demographic Factors
Legal Requirements:

CWC Section 10631:
(a) Describe the service area of the supplier, including… other social, economic and demographic factors affecting the supplier’s water management planning.

According to the data available through the U.S. Census Bureau American Community Survey for 2019, the City’s median household income is $55,674, and the poverty rate is 20.7%. Approximately 73.2% of the population has attained a high school diploma and 14.0% has a bachelor’s degree or higher. The racial makeup of Atwater consists of White, African American, American Indian, Asian, Pacific Islander, and Hispanic or Latino as shown in Table 3-3.

Table 3-3 – Demographic Factors
Parameter Value
Age and Sex
Persons under 5 years, percent 8.1%
Persons under 18 years, percent 29.8%
Persons 65 years and over, percent 11.5%
Female persons, percent 50.7%
Race and Hispanic Origin
White alone, percent 57.9%
Black or African American alone, percent 3.8%
American Indian and Alaska Native alone, percent 1.0%
Asian alone, percent 4.5%
Native Hawaiian and Other Pacific Islander alone, percent 0.2% Two or More Races, percent 5.0%
Hispanic or Latino, percent 56.5%
White alone, not Hispanic or Latino, percent 32.5%
Source: U.S. Census Bureau for Atwater City, California. 2020 2025 2030 2035 2040 2045(opt)
31,648 33,889 36,289 38,859 41,611
Submittal Table 3-1 Retail: Population - Current and Projected Population
Served
NOTES: (1) 2020 population from DOF, Table E-5. (2) Projected populations assume a growth rate of 7.1% every five years, based on the 5-year growth rate from 2015 - 2020 where population increased from 29,555 to 31,648.

Page 297 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
3-7

3.5 Land Uses within Service Area
Legal Requirements:

CWC Section 10631(a):

The description shall include the current and projected land uses within the existing or anticipated service area affecting the supplier’s water management planning. Urban water suppliers shall coordinate with local or regional land use authorities to determine the most appropriate land use information, including, where appropriate, land use information obtained from local or regional land use authorities…
The City is predominantly comprised of single-family residential, multi-family residential, commercial, institutional, and landscape irrigation. Figure 3-3 shows the land use diagram for the City of Atwater.

Page 298 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
3-8
Figure 3-3 – General Plan Land Use

Page 299 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
4-1
4 Water Use Characterization
This chapter describes and quantifies the current and projected water demands within the City’s service area.

4.1 Non-Potable versus Potable Water Use
This chapter addresses demands that are met by potable water sources. Recycled water use is described separately in Chapter 6. The City does not use other non-potable water sources.

4.2 Past, Current, and Projected Water Use by Sector
Legal Requirements:

CWC Section 10635:
(a) Every urban water Supplier shall include, as part of its urban water management plan, an assessment of the reliability of its water service to its customers during normal, dry, and multiple dry water years.

This water supply and demand assessment shall compare the total water supply sources available to the water supplier with the long-term total projected water use over the next 20 years, in five-year increments, for a normal water year, a single dry water year, and a drought lasting five consecutive water years. The water service reliability assessment shall be based upon the information compiled pursuant to Section 10631, including available data from state, regional, or local agency population projections within the service area of the urban water supplier.

CWC Section 10631(d):
(1) For an urban retail water supplier, quantify, to the extent records are available, past and current water use, over the same five-year increments described in subdivision (a), and projected water use, based upon information developed pursuant to subdivision (a), identifying the uses among water use sectors, including, but not necessarily limited to, all of the following… (2) The water use projections shall be in the same five-year increments described in subdivision (a). (4)(A) Water use projections, where available, shall display and account for the water savings estimated to result from adopted codes, standards, ordinances, or transportation and land use plans identified by the urban water supplier, as applicable to the service area. (B) To the extent that an urban water supplier reports the information described in subparagraph (A), an urban water supplier shall do both of the following: (i) Provide citations of the various codes, standards, ordinances, or transportation and land use plans utilized in making the projections. (ii) Indicate the extent that the water use projections consider savings from codes, standards, ordinances, or transportation and land use plans. Water use projections that do not account for these water savings shall be noted of that fact.

The following sections describe past, current, and projected water use within the City for each of the ten water use sectors identified in CWC Section 10631(d).

Page 300 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
4-2

4.2.1 Water Use Sectors Listed in Water Code
Legal Requirements:

The water use sectors that are served by the water system include single-family residential, multi-family residential, commercial, institutional, and landscape irrigation. These classifications were used to analyze current consumption patterns. These classifications are defined by the DWR 2020 UWMP Guidebook and City as follows:
• Single-family residential – A single-family dwelling unit. A lot with a free-standing building containing one dwelling unit that may include an accessory dwelling unit. • Multi-family residential – Multiple dwelling units contained within one building or several buildings within one complex.
• Commercial – A water user that provides or distributes a product or service. • Institutional – A water user that is primarily a manufacturer or processor of materials as defined by the North American Industrial Classification System (NAICS) code sectors 31 to 33, inclusive, or an entity that is a water user primarily engaged in research and development. • Landscape Irrigation – Water connections supplying water solely for landscape irrigation. • Distribution System Water Losses – Water losses which occur due to distribution system leaks and other unmetered water uses (such as firefighting, main flushing, etc.).

4.2.2 Water Use Sectors in Addition to Those Listed in Water Code The water system does not serve additional water use sectors.

4.2.3 Past Water Use
The City’s past water use for 2016-2019 is shown in Table 4-1.

Page 301 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
4-3
Table 4-1 – Past Water Use (2016-2019)
Water Use (AF)
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total 2016 298 323 336 434 613 823 918 989 741 615 251 323 6,664 2017 312 267 343 361 795 828 1,007 913 758 755 453 370 7,164 2018 378 410 352 518 825 900 1,113 1,004 846 792 518 314 7,970 2019 368 297 329 619 717 1,040 1,120 1,132 884 735 564 353 8,157

4.2.4 Distribution System Water Loss
Legal Requirements:

CWC Section 10631(d)(1):

For an urban retail water supplier, quantify, to the extent records are available, past and current water use, over the same five-year increments described in subdivision (a), and projected water use, based upon information developed pursuant to subdivision (a), identifying the uses among water use sectors, including, but not necessarily limited to, all of the following… (J) Distribution system water loss….

CWC Section 10631(d)(3):
(A) The distribution system water loss shall be quantified for each of the five years preceding the plan update, in accordance with rules adopted pursuant to Section 10608.34. (B) The distribution system water loss quantification shall be reported in accordance with a worksheet approved or developed by the department through a public process. The water loss quantification worksheet shall be based on the water system balance methodology developed by the American Water Works Association.
(C) In the plan due July 1, 2021, and in each update thereafter, data shall be included to show whether the urban retail water supplier met the distribution loss standards enacted by the board pursuant to Section 10608.34.

The last four years of water loss audit reporting are summarized in Table 4-2 (DWR Table 4-4). Water audit data for 2020 was not available at this time. The water loss audits for 2016-2019 are in Appendix D.

Page 302 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
4-4
Table 4-2 – Last Five Years of Water Loss Audit Reporting (DWR Table 4-4) CWC Section 10608.34(i) directs the State Water Board to “adopt rules requiring urban retail water suppliers to meet performance standards for the volume of water losses.” The proposed regulation would require urban water suppliers to meet individual volumetric water loss standards determined through a water system-specific economic model developed by the State Water Board. Pursuant to this law, urban retail water suppliers, such as the City, have annually submitted water loss audits to DWR since October 2017. Pre-rulemaking meetings and workshops were held in 2018-2020 and adoption of the proposed regulation is anticipated to occur in 2021. Once the economic model is finalized, the City can determine their individual volumetric water loss standard.

4.2.5 Current Water Use
The City is only partially metered. Metered water use data and the number of connections for each use type were used to estimate total water demand per use type for 2020. The City does not supply raw water for saline water intrusion, agricultural/landscape, recharge, wetlands, or to any raw water users; therefore, they are not applicable to this plan. Table 4-3 (DWR Table 4-1) shows potable water use for 2020 by water use type.

Reporting Period Start Date
(mm/yyyy) Volume of Water Loss 1,2
07/2016 1,980
07/2017 2,764
07/2018 3,162
07/2019 1,388
07/2020 Not available
Submittal Table 4-4 Retail: Last Five Years of Water
Loss Audit Reporting
NOTES: Water loss audit reporting started in 2016. Water loss audit report for 07/2020 - 06/2021 was not available when the 2020 UWMP was completed.
1 Taken from the field "Water Losses" (a combination of apparent losses and real losses) from the AWWA worksheet.
2 Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 303 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
4-5
Table 4-3 – Demands for Potable and Non-Potable Water – Actual (DWR Table 4-1) Use Type
Drop down list
May select each use multiple times
These are the only Use Types that
will be recognized by the WUEdata
online submittal tool
Additional Description
(as needed)
Level of Treatment
When Delivered
Drop down list
Volume2
Single Family Drinking Water 4,068
Multi-Family Drinking Water 844
Commercial Drinking Water 2,174
Other Drinking Water 1,474
8,559
Submittal Table 4-1 Retail: Demands for Potable and Non-Potable1 Water - Actual 2020 Actual
NOTES: Volumes for single family, multi-family, and commercial were estimated because these use types are only partially metered. Volumes were increased based on the ratio of total service connections and the number of metered service connections for each use type.

TOTAL
Add additional rows as needed
1 Recycled water demands are NOT reported in this table. Recycled water demands are reported in Table 6-4. 2 Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 304 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
4-6

4.2.6 Projected Water Use
Legal Requirements:

CWC Section 10635 (a):

Every urban water supplier shall include, as part of its urban water management plan, an assessment of the reliability of its water service to its customers during normal, dry, and multiple dry water years.

Water Code Section 10631:
(h) An urban water supplier that relies upon a wholesale agency for a source of water shall provide the wholesale agency with water use projections from that agency for that source of water in five-year increments to 20 years or as far as data is available… The wholesale agency shall provide information to the urban water supplier for inclusion in the urban water supplier’s plan that identifies and quantifies, to the extent practicable, the existing and planned sources of water as required by subdivision (b), available from the wholesale agency to the urban water supplier over the same five-year increments, and during various water-year types in accordance with subdivision (f). An urban water supplier may rely upon water supply information provided by the wholesale agency in fulfilling the plan informational requirements of subdivisions (b) and (f).

CWC Section 10631(d)(4):
(A) Water use projections, where available, shall display and account for the water savings estimated to result from adopted codes, standards, ordinances, or transportation and land use plans identified by the urban water supplier, as applicable to the service area. (B) To the extent that an urban water supplier reports the information described in subparagraph (A), an urban water supplier shall do both of the following:
(i) Provide citations of the various codes, standards, ordinances, or transportation and land use plans utilized in making the projections.
(ii) Indicate the extent that the water use projections consider savings from codes, standards, ordinances, or transportation and land use plans. Water use projections that do not account for these water savings shall be noted of that fact.

Table 4-4 (DWR Table 4-2) summarizes the projected water use by use type from 2025 through 2040. The water use in Table 4-4 (DWR Table 4-2) was calculated using the following assumptions:
• 2020 Target SB X7-7 of 254 gallons per capita per day, further described in Chapter 5 • Population projections presented in Table 3-2 (DWR Table 3-1) • Percentage water use by use type for future years was the same as for 2020 The projections are conservative and do not consider potential water use reductions from codes, standards, ordinances, or transportation and land use plans.

Page 305 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
4-7
Table 4-4 – Use for Potable and Non-Potable Water – Projected (DWR Table 4-2) Table 4-5 (DWR Table 4-3)summarizes the total projected potable and non-potable water use in five-year increments from 2020 to 2040.

Table 4-5 – Total Water Use (Potable and Non-Potable) (DWR Table 4-3) Use Type
Drop down list
May select each use multiple times
These are the only Use Types that will be recognized by the WUEdata online submittal tool
2025 2030 2035 2040
2045
(opt)
Single Family 4,582 4,907 5,254 5,626
Multi-Family 951 1,018 1,090 1,167
Commercial 2,449 2,622 2,808 3,007
Other 1,660 1,777 1,903 2,038
9,642 10,324 11,056 11,838 0
Projected Water Use2
Report To the Extent that Records are Available
Submittal Table 4-2 Retail: Use for Potable and Non-Potable1 Water - Projected Additional Description
(as needed)
Add additional rows as needed
1 Recycled water demands are NOT reported in this table. Recycled water demands are reported in Table 6-4. 2 Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

NOTES:

TOTAL
2020 2025 2030 2035 2040
2045
(opt)
Potable Water, Raw, Other
Non-potable
From Tables 4-1R and 4-2 R
8,559 9,642 10,324 11,056 11,838 0
Recycled Water Demand1
From Table 6-4
0 0 0 0 0 0
Optional Deduction of
Recycled Water Put Into
Long-Term Storage2
TOTAL WATER USE 8,559 9,642 10,324 11,056 11,838 0
Submittal Table 4-3 Retail: Total Water Use (Potable and Non-Potable) NOTES:
1Recycled water demand fields will be blank until Table 6-4 is complete 2 Long term storage means water placed into groundwater or surface storage that is not removed from storage in the same year. Supplier may deduct recycled water placed in longterm storage from their reported demand. This value is manually entered into Table 4-3.

Page 306 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
4-8

4.2.7 Characteristic Five-Year Water Use
Legal Requirements:

CWC Section 10635(b):

Table 4-6 shows the summarized characteristic five-year water use. The projections assume a straightline population growth between 2020 and 2025 and a water demand of 254 gallons per capita per day (gpcd). The per capita water demand is based on an unconstrained water demand of 254 gpcd. The unconstrained water demand of 254 gpcd is equivalent to the SB X7-7 2020 target water demand shown in Table 5-1 (DWR Table 5-1).

Table 4-6 – Characteristic Five-Year Water Use
Year
Description 2021 2022 2023 2024 2025
Per capita water use, gpcda 254 254 254 254 254
Populationb 32,084 32,526 32,974 33,429 33,889
Total water use, AF 9,128 9,254 9,381 9,511 9,642 a Assumes an unconstrained water demand of 254 gpcd, equivalent to the SB X7-7 2020 target demand from Table 5-1 (DWR Table 5-1). b Projections assume a straight-line increase in population from the 2020 and 2025 population data presented in Table 3-2 (DWR Table 3-1).

Page 307 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
4-9

4.3 Water Use for Lower Income Households
Legal Requirements:

CWC Section 10631.1:
(a) The water use projections required by Section 10631 shall include projected water use for singlefamily and multifamily residential housing needed for lower income households, as defined in Section 50079.5 of the Health and Safety Code, as identified in the housing element of any city, county, or city and county in the service area of the supplier.

California Health and Safety Code Section 50079.5 (a):
“Lower income households” means persons and families whose income does not exceed the qualifying limits for lower income families… In the event the federal standards are discontinued, the department shall, by regulation, establish income limits for lower income households for all geographic areas of the state at 80 percent of area median income, adjusted for family size and revised annually.

As described above, the UWMP is required to account for lower income household water demands. Lower income households are defined as families with an income less than 80 percent of the area median income, adjusted for family size. U.S. Census data from the 2015-2019 American Community Survey 5- Year Estimates report an average of 3.18 persons per household and approximately 3,771 lower income households within the City, equating to an estimated 11,992 residents. Projected water demands associated with lower income residential water users through year 2040 are presented in Table 4-7. The projections assume the proportion of lower income residents to total residents remains constant and per capita water demands of 241 for 2020 and 254 gpcd for 2025 and beyond.

Table 4-7 – City of Atwater Lower Income Household Water Demands Description 2020 2025 2030 2035 2040
Total water use, AFa 8,559 9,642 10,324 11,056 11,838
Total populationb 31,648 33,889 36,289 38,859 41,611
Lower income populationc 11,992 12,841 12,841 12,841 12,841 Lower income water demand, AF 3,243 3,654 3,653 3,654 3,653 a Total water use is from Table 4-5 (DWR Table 4-3)
b Total population is from Table 3-2 (DWR Table 3-1)
c Lower income population estimated using US Census Bureau, American Community Survey, Table S2503 data for 2019.

Ratio of lower income population to total population was assumed to be the same for 2020 through 2040.

As shown in Table 4-8 (DWR Table 4-5), lower income demand projections presented in Table 4-7 are included in the total water use projections provided in Table 4-5 (DWR Table 4-3).

Page 308 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
4-10
Table 4-8 – Inclusion in Water Use Projections (DWR Table 4‑5)

4.4 Climate Change Considerations
Legal Requirements:

CWC Section 10630:

It is the intention of the Legislature, in enacting this part, to permit levels of water management planning commensurate with the numbers of customers served and the volume of water supplied, while accounting for impacts from climate change.

CWC Section 10635(b):

The 2018 Merced Integrated Regional Water Management Plan Update, adopted in February 2019 [1] (MIRWMP), addressed adaptation to the effects of climate change and mitigation of greenhouse gas emissions. Potential effects of climate change in the region of the City may include warmer temperatures, an increase in the uncertainty of future precipitation conditions, increases in extreme precipitation events, and increased wildfire frequency and severity. According to climate scientists, increases in global greenhouse gas levels are changing climate patterns around the world and, it is speculated, may begin to change at an accelerated pace from what has occurred in the past. An accelerated rate of change could potentially result in impacts to the local climate of the City in the form of higher temperatures, increased droughts and floods, decreased snowpack amounts and durations, and other extreme variations in weather.

Are Future Water Savings Included in Projections?
(Refer to Appendix K of UWMP Guidebook)
Drop down list (y/n) No
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.

Are Lower Income Residential Demands Included In Projections? Drop down list (y/n)
Yes
Submittal Table 4-5 Retail Only: Inclusion in Water Use Projections NOTES:

Page 309 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
4-11
Previous City documents, such as the MIRWMP identified several resource management strategies to mitigate potential impacts on water supply on reliability. The resource management strategies include:
• Reducing water demand
• Improving operational efficiency and transfers
• Increasing water supply through implementation of conjunctive management of surface and groundwater supplies as well as through groundwater storage, recycled water use, and increased surface water storage, as appropriate
• Improving water quality
• Improving flood management
• Practicing resource stewardship
• Public outreach

Page 310 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
5-1
5 SB X7-7 Baselines, Targets, and 2020 Compliance
With the adoption of the Water Conservation Act of 2009, also known as the SB X7-7, the State of California was required to reduce urban per capita water use by 20 percent by the year 2020 (i.e., “20 by 2020”). CWC Section 10608.16(a) states: “The state shall achieve a 20-percent reduction in urban per capita water use in California on or before December 31, 2020.” To achieve this statewide objective, the California Legislature required each urban retail water supplier (Retail Supplier) subject to the UWMPA to develop an urban water use target to help the state collectively achieve a 20-percent reduction.

This chapter provides a description of the methodology used to calculate the City’s compliance with SB X7-7 requirements. The SB X7-7 Verification Form from the 2015 UWMP and the SB X7-7 Compliance Form are included in Appendix E.

5.1 Baseline and Target Calculations for 2020 UWMPs
Legal Requirements:

CWC Section 10608.20 (g):
(g) An urban retail water supplier may update its 2020 urban water use target in its 2015 urban water management plan required pursuant to Part 2.6 (commencing with Section 10610).

The City calculated their SB X7-7 baselines and targets in their 2015 UWMP and did not have a situation, such as a change to the service area or customer base, to warrant recalculation of the baselines and targets. Table 5-1 (DWR Table 5-1) summarizes the SB X7-7 baseline and confirmed 2020 target from the SB X7-7 Verification Form.

Table 5-1 – Baselines and Targets Summary from SB X7-7 Verification Form (DWR Table 5-1) 10-15
year
2000 2009 317
5 Year 2005 2009 302
Submittal Table 5-1 Baselines and Targets Summary
From SB X7-7 Verification Form
Retail Supplier or Regional Alliance Only
*All cells in this table should be populated manually from the supplier's SBX7-7 Verification Form and reported in Gallons per Capita per Day (GPCD)
NOTES:
254
Baseline
Period Start Year * End Year *
Average
Baseline
GPCD*
Confirmed
2020 Target*

Page 311 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
5-2

5.2 Methods for Calculating Population and Gross Water Use This section describes the methods used for calculating population and gross water use for determining 2020 compliance with the SB X7-7 target.

5.2.1 Service Area Population
Legal Requirements:

CWC Section 10608.20(e):

An urban retail water supplier shall include in its urban water management plan due in 2010…the baseline per capita water use…along with the bases for determining those estimates, including references to supporting data.
(f) When calculating per capita values for the purposes of this chapter, an urban retail water supplier shall determine population using federal, state, and local population reports and projections.

CWC Section 10644:
(a)(2) The plan…shall include any standardized forms, tables or displays specified by the department.

To calculate the compliance year gpcd, the population served in 2020 was estimated using DOF data. U.S.

Census 2020 decennial data was not available in time for completion of the 2020 UWMP. The service area boundaries for the City water system correspond by 95 percent or more with the boundaries of the City and, therefore, the DOF data for the City could be used for the service area population according to the 2020 DWR Guidebook. The service area population for 2020 is estimated as 31,648, as shown in Table 3- 2 (DWR Table 3-1).

5.3 Gross Water Use
Legal Requirements:

CWC Section 10608.12:
(g) “Gross Water Use” means the total volume of water, whether treated or untreated, entering the distribution system of an urban retail water supplier, excluding all of the following:
(1) Recycled water that is delivered within the service area of an urban retail water supplier or its urban wholesale water supplier
(2) The net volume of water that the urban retail water supplier places into long term storage (3) The volume of water the urban retail water supplier conveys for use by another urban water supplier (4) The volume of water delivered for agricultural use, except as otherwise provided in subdivision (f) of Section 10608.24.

California Code of Regulations Title 23 Division 2 Chapter 5.1 Article Section 596 (a):

An urban retail water supplier that has a substantial percentage of industrial water use in its service area is eligible to exclude the process water use of existing industrial water customers from the calculation of its gross water use to avoid a disproportionate burden on another customer sector.

Page 312 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
5-3
Gross water use is defined as the measurable amount of water that enters the distribution system over a 12-month period, minus allowable exclusions. The gross water use for 2020 was 8,559 AF, as reported in Table 4-3 (DWR Table 4-1) and SB X7-7 Table 4 of the SB X7-7 2020 Compliance Form provided in Appendix E.

5.4 2020 Compliance Daily Per-Capita Water Use (GPCD)
Legal Requirements:

CWC Section 10608.12:
(f) “Compliance daily per-capita water use” means the gross water use during the final year of the reporting period…
CWC Section 10608.20:
(e) An urban retail water supplier shall include in its urban water management plan due in 2010 . . . compliance daily per capita water use, along with the bases for determining those estimates, including references to supporting data.

The City has calculated its actual 2020 water use for the 2020 calendar year in accordance with Methodology 3 of DWR’s Methodologies document. As shown in Table 5-2 (DWR Table 5-2), per capita water use in 2020 was 241 gpcd, which is below the 2020 target of 254 gpcd.

Table 5-2 – 2020 Compliance (DWR Table 5-2)
As detailed in CWC Section 10608.4, there are allowable adjustments that can be made to an agency’s gross water use in 2020 for differences in evapotranspiration and rainfall, substantial changes to commercial or industrial water use, and/or substantial changes to institutional water use. However, because the City’s per capita water use is in compliance, the City did not elect to include the allowable adjustments.

Actual
2020 GPCD*
2020 TOTAL
Adjustments*
Adjusted 2020
GPCD*
(Adjusted if
applicable)
241 0 241 254 Yes
NOTES:
2020
Confirmed
Target GPCD*
Did Supplier
Achieve
Targeted
Reduction for
2020? Y/N
2020 GPCD
Submittal Table 5-2: 2020 Compliance
From SB X7-7 2020 Compliance Form
Retail Supplier or Regional Alliance Only
*All cells in this table should be populated manually from the supplier's SBX7-7 2020 Compliance Form and reported in Gallons per Capita per Day (GPCD)

Page 313 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
5-4

5.5 Regional Alliance
The City has chosen to comply with the requirements of SB X7-7 on an individual basis and is, therefore, not a participant in a regional alliance for SB X7-7 compliance.

Page 314 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
6-1
6 Water Supply Characterization
Legal Requirements:

CWC Section 10631(b):

Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier over the same five-year increments described in subdivision (a), providing supporting and related information, including all of the following:
(1) A detailed discussion of anticipated supply availability under a normal water year, single dry year, and droughts lasting at least five years, as well as more frequent and severe periods of drought, as described in the drought risk assessment. For each source of water supply, consider any information pertinent to the reliability analysis conducted pursuant to Section 10635, including changes in supply due to climate change.
(2) When multiple sources of water supply are identified, a description of the management of each supply in correlation with the other identified supplies. (3) For any planned sources of water supply, a description of the measures that are being undertaken to acquire and develop those water supplies.

CWC 10631 (h):

An urban water supplier that relies upon a wholesale agency for a source of water shall provide the wholesale agency with water use projections from that agency for that source of water in five-year increments to 20 years or as far as data is available. The wholesale agency shall provide information to the urban water supplier for inclusion in the urban water supplier’s plan that identifies and quantifies, to the extent practicable, the existing and planned sources of water as required by subdivision (b), available from the wholesale agency to the urban water supplier over the same five-year increments, and during various water-year types in accordance with subdivision (f). An urban water supplier may rely upon water supply information provided by the wholesale agency in fulfilling the plan informational requirements of subdivisions (b) and (f).

The UWMPA requires that the UWMP include a description of the agency’s existing and future water supply sources for the next 20 years. This chapter will provide the following information:
• Existing and planned sources of water
• Projections of the water supplies over five-year increments through 2040 • Description of anticipated availability under normal, single dry, and five-year droughts • Description of the management of each supply in correlation • Description of information pertinent to the reliability of the supplies, including considerations for climate change effects

6.1 Narrative Sections for Supplier’s UWMP Water Supply Characterization

6.1.1 Purchased or Imported Water
The City does not currently purchase or import water from any other water supply or entity.

Page 315 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
6-2

6.1.2 Groundwater
Legal Requirements:

CWC Section 10631(b)(4):

If groundwater is identified as an existing or planned source of water available to the supplier, all of the following information:
(A) The current version of any groundwater sustainability plan or alternative adopted pursuant to Part

2.74 (commencing with Section 10720), any groundwater management plan adopted by the urban water supplier, including plans adopted pursuant to Part 2.75 (commencing with Section 10750), or any other specific authorization for groundwater management for basins underlying the urban water supplier’s service area.
(B) A description of any groundwater basin or basins from which the urban water supplier pumps groundwater. For basins that a court or the board has adjudicated the rights to pump groundwater, a copy of the order or decree adopted by the court or the board and a description of the amount of groundwater the urban water supplier has the legal right to pump under the order or decree. For a basin that has not been adjudicated, information as to whether the department has identified the basin as a high- or medium-priority basin in the most current official departmental bulletin that characterizes the condition of the groundwater basin, and a detailed description of the efforts being undertaken by the urban water supplier to coordinate with groundwater sustainability agencies or groundwater management agencies listed in subdivision (c) of Section 10723 to maintain or achieve sustainable groundwater conditions in accordance with a groundwater sustainability plan or alternative adopted pursuant to Part 2.74 (commencing with Section 10720).
(C) A detailed description and analysis of the location, amount, and sufficiency of groundwater pumped by the urban water supplier for the past five years. The description and analysis shall be based on information that is reasonably available, including, but not limited to, historic use records. (D) A detailed description and analysis of the amount and location of groundwater that is projected to be pumped by the urban water supplier. The description and analysis shall be based on information that is reasonably available, including, but not limited to, historic use records.

Atwater extracts its water supply from groundwater aquifers via a series of wells scattered throughout the city. The City’s existing system facilities include nine wells (eight active and one drilled but not equipped) with a total rated pumping capacity of approximately 15,000 gpm for the active wells, a distribution system with line sizes ranging from 4 to 14 inches in diameter, and an elevated storage tank with a capacity of 1 million gallons (MG). In addition, the system includes two 0.5-MG surface storage tanks with booster pumps to serve the federal penitentiary.

On April 20, 2018, the State Water Board, through its Division of Drinking Water, issued to the City of Atwater Compliance Order No. 03-11-18R-014 for violation of CHSC, Section 116555(a)(1) and California Code of Regulations, Title 22, Section 64444 MCL – Organic Chemicals. Except for City Well 21, all City wells currently exceed the maximum contaminant level (MCL) for 1,2,3-Trichloropropane (TCP).

Well 15 is currently being treated for TCP using four granular activated carbon (GAC) vessels configured in-parallel that were previously used to treat for 1,2,-Dibromo-3-chloropropane (DBCP). Additional vessels will be added to treat in-series when funding allows. The City notified its customers in May 2018 of its TCP MCL violation. The State has given the City of Atwater until April 30, 2021 to come into compliance with the TCP MCL. On June 7, 2018, the City responded to the State that it could not meet the stated

Page 316 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
6-3
compliance date and requested that the compliance date not be set any earlier than April 30, 2022. The City is in the process of adding treatment for TCP to all well sites which currently exceed the TCP MCL.

6.1.2.1 Groundwater Sustainability Plan
In September 2014, Governor Brown signed the Sustainable Groundwater Management Act (SGMA) into law. This legislation is intended to provide a framework for management of groundwater supplies by local agencies and restricts state intervention, if required. The three legislative bills that make up the SGMA are AB 1739, SB 1319, and SB 1168. SGMA required that high-priority basins develop groundwater sustainability agencies (GSAs), develop GSPs, and manage groundwater for long-term sustainability. The Merced Subbasin was classified as a high-priority basin in the SGMA 2019 Basin Prioritization, completed in December 2019.

Water management and land management agencies in the Merced Subbasin formed three GSAs: the Merced Irrigation-Urban GSA (MIUGSA), the Merced Subbasin GSA, and the Turner Island Water District GSA. The three GSAs collaborated on a GSP for the entire Merced Subbasin. The City is a member of the MIUGSA which was formed by a Memorandum of Understanding (MOU) between the MID, City of Merced, City, City of Livingston, Le Grand Community Services District, Planada Community Services District, and Winton Water and Sanitary District.

The Merced Subbasin GSP was adopted by the MIUGSA in December 2019. A copy of the document is posted on the following Merced Subbasin GSA website: http://mercedsgma.org/resources#documents.

With the adoption of the Merced Subbasin GSP, the participating GSAs adopted a goal of achieving sustainable groundwater management on a long-term average basis by increasing recharge and/or reducing groundwater pumping, while avoiding undesirable results. The goal will be achieved by allocating a portion of the estimated Merced Subbasin sustainable yield to each of the three participating GSAs and coordinating the implementation of programs and projects to increase both direct and in-lieu groundwater recharge which will in turn increase the groundwater and/or surface water available.

Implementation of the GSP will be a substantial undertaking. The Merced Subbasin GSP implementation schedule for the initial five years (2020-2025) focuses on monitoring and reporting activities, including developing initial GSA allocations, and establishing allocation procedures and demand reduction efforts.

The implementation of the GSP will improve the long-term water supply reliability for the City by providing estimates for sustainable groundwater quantities that are available.

6.1.2.2 Groundwater Basin Description
Atwater is located in the San Joaquin River Hydrologic Region (groundwater basin) and extracts its groundwater from the Merced Subbasin, Basin Number 5-22.04.

The Merced Subbasin contains three principal aquifers that are defined by their relationship to the Corcoran Clay aquitard, a laterally-extensive silt and clay layer that underlies approximately the western half of the subbasin and acts as a significant confining layer. The Above Corcoran Principal Aquifer includes all aquifer units that exist above the Corcoran Clay aquitard and generally contains moderate to large hydraulic conductivities and yields for domestic and irrigation uses. The Below Corcoran Principal Aquifer includes all aquifer units that exist below the Corcoran Clay aquitard and contains hydraulic conductivities and yields ranging from small to large for irrigation as well as some domestic and municipal uses. The Outside Corcoran Principal Aquifer includes all aquifers that exist outside of the eastern lateral extent of the Corcoran Clay. The Outside Corcoran Principal Aquifer is connected laterally with the Above Corcoran Principal Aquifer at shallower depths and the Below Corcoran Principal Aquifer at deeper depths. Major

Page 317 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
6-4
uses of water in the Outside Corcoran Principal Aquifer include irrigation, domestic, and municipal uses.

The principal aquifers are underlain by a deep aquifer with higher salinity relative to the principal aquifers.

The groundwater aquifer from which the City obtains its water is not adjudicated. An adjudication consists of a groundwater basin in which all rights to water could be defined by a court. As a non-adjudicated basin, there are no defined legal pumping rights for the City and there are no legal constraints on groundwater pumping.

The Merced Subbasin is a high priority basin and is critically overdrafted. The City and other members of the MIUGSA are in the process of implementing measures from the recently adopted GSP to sustainably manage the groundwater basin, including allocation of the estimated sustainable yield of the basin to the GSAs.

The San Joaquin River Groundwater Basin is not adjudicated. Therefore, no limitations are placed on groundwater pumpage volumes. Portions of the San Joaquin River Groundwater Basin have been in a state of overdraft for many years, including the Merced Subbasin. The California Water Plan Update – Bulletin 160-98 estimated the average overdraft in the San Joaquin River Groundwater Basin to be 239,000 AF in 1995.

6.1.2.3 Past Five Years
The historical volume of groundwater pumped by the City over the past five years is provided in Table 6- 1 (DWR Table 6-1).

Table 6-1 – Groundwater Volume Pumped (DWR Table 6-1)
Groundwater Type
Drop Down List
May use each category
multiple times
Location or Basin Name 2016* 2017* 2018* 2019* 2020*
Alluvial Basin San Joaquin River 6,664 7,164 7,970 8,157 8,559 6,664 7,164 7,970 8,157 8,559
Add additional rows as needed
Submittal Table 6-1 Retail: Groundwater Volume Pumped
Supplier does not pump groundwater.

The supplier will not complete the table below.

NOTES:

TOTAL
All or part of the groundwater described below is desalinated. * Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 318 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
6-5

6.1.3 Surface Water
The City does not receive any water supply from surface water.

6.1.4 Stormwater
The City’s storm drainage system primarily consists of man-made irrigation canals that carry storm runoff and two drainage canals that provide drainage from the City. The canals transport stormwater from the City, and the stormwater eventually drains to the San Joaquin River. In addition, the system consists of catch basins that collect runoff water from the street, pump stations that are used to remove stormwater from sections of road that cannot be drained by gravity, pipes of various sizes, as well as a detention basin to prevent flooding.

Atwater covers all costs of maintaining drainage facilities and infrastructure except in the case of the MID facilities used by the City. Discharge from within the City flows to MID facilities. The maintenance costs of these shared facilities are borne by Atwater and the MID based on percentage of usage. At the time of the 2010 MSR Review, Atwater provided 60 percent of maintenance costs and the MID supplies 40 percent.

Page 319 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
6-6

6.1.5 Wastewater and Recycled Water
Legal Requirements:

CWC Section 10633:

The plan shall provide, to the extent available, information on recycled water and its potential for use as a water source in the service area of the urban water supplier. The preparation of the plan shall be coordinated with local water, wastewater, groundwater, and planning agencies that operate within the supplier’s service area, and shall include all of the following:
(a) A description of the wastewater collection and treatment systems in the supplier’s service area, including a quantification of the amount of wastewater collected and treated and the methods of wastewater disposal.
(b) A description of the quantity of treated wastewater that meets recycled water standards, is being discharged, and is otherwise available for use in a recycled water project. (c) A description of the recycled water currently being used in the supplier’s service area, including, but not limited to, the type, place, and quantity of use.
(d) A description and quantification of the potential uses of recycled water, including, but not limited to, agricultural irrigation, landscape irrigation, wildlife habitat enhancement, wetlands, industrial reuse, groundwater recharge, indirect potable reuse, and other appropriate uses, and a determination with regard to the technical and economic feasibility of serving those uses. (e) The projected use of recycled water within the supplier’s service area at the end of 5, 10, 15, and 20 years, and a description of the actual use of recycled water in comparison to uses previously projected pursuant to this subdivision.
(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.
(g) A plan for optimizing the use of recycled water in the supplier’s service area, including actions to facilitate the installation of dual distribution systems, to promote recirculating uses, to facilitate the increased use of treated wastewater that meets recycled water standards, and to overcome any obstacles to achieving that increased use.

The UWMPA requires that the UWMP address the opportunities for development of recycled water, including the description of existing recycled water applications, quantities of wastewater currently being treated to recycled water standards, limitations on the use of available recycled water, an estimate of projected recycled water use, the feasibility of said projected uses, and practices to encourage the use of recycled water.

6.1.5.1 Recycled Water Coordination
Legal Requirements:

CWC Section 10633:

No recycled water is currently being used in the City’s service area.

Page 320 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
6-7

6.1.5.2 Wastewater Collection, Treatment, and Disposal
Legal Requirements:

CWC Section 10633(a):

A description of the wastewater collection and treatment systems in the supplier’s service area, including a quantification of the amount of wastewater collected and treated and the methods of wastewater disposal.

In 2012, construction of a new regional wastewater treatment plant on Bert Crane Road, approximately 6 miles south from the previous facility, was completed. The new treatment plant has a capacity of 6 million gallons per day (mgd). The quality of treatment was improved to enable the City to meet the California Regional Water Quality Control Board’s discharge requirements. The updated treatment plant is also designed to allow for expansion, when needed, to handle flows from future development.

The wastewater treatment plant (WWTP) is owned by the City but operated by a private contractor, Veolia Water North America, West. The 2020 average daily flow was 3.3 mgd. This value corresponds to approximately 54 percent of the current average daily permitted flow.

The WWTP receives and treats wastewater from the City as well as the Winton Water and Sanitary District (WWSD) and Castle Airport. Castle Airport includes the entire old Castle Air Force Base, which is now Castle Airport, the federal prison, Castle Gardens, and the old Air Force off-base housing (redeveloped for single-family residential land use).

Tables 6-2 (DWR Table 6-2) and 6-3 (DWR Table 6-3) summarize information regarding the wastewater collection, treatment, and discharge within the service area in 2020.

Page 321 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
6-8
Table 6-2 – Wastewater Collected within Service Area in 2020 (DWR Table 6-2) Table 6-3 – Wastewater Treatment and Discharge within Service Area in 2020 (DWR Table 6-3) Name of
Wastewater
Collection
Agency
Wastewater
Volume
Metered or
Estimated?
Drop Down List
Volume of
Wastewater
Collected from
UWMP Service
Area 2020 *
Name of
Wastewater
Treatment
Agency
Receiving
Collected
Wastewater
Treatment
Plant Name
Is WWTP
Located Within
UWMP Area?
Drop Down List
Is WWTP
Operation
Contracted to a
Third Party?
(optional)
Drop Down List
City of Atwater Metered 3,663 City of Atwater
Atwater
Regional
Wastewater
Treatment
Facility
No
3,663
Total Wastewater Collected
from Service Area in 2020:

NOTES: Volume of wastewater collected includes wastewater from City of Atwater, Castle Airport, and the Winton Water and Sanitary District (WWSD).
* Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3 .

Submittal Table 6-2 Retail: Wastewater Collected Within Service Area in 2020 There is no wastewater collection system. The supplier will not complete the table below.

Percentage of 2020 service area covered by wastewater collection system (optional) Percentage of 2020 service area population covered by wastewater collection system (optional) Wastewater Collection Recipient of Collected Wastewater Wastewater
Treated
Discharged
Treated
Wastewater
Recycled
Within Service
Area
Recycled
Outside of
Service Area
Instream Flow
Permit
Requirement
Total 0 0 0 0 0
1 Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3. 2 If the Wastewater Discharge ID Number is not available to the UWMP preparer, access the SWRCB CIWQS regulated facility website at https://ciwqs.waterboards.ca.gov/ciwqs/readOnly/CiwqsReportServlet?inCommand=reset&reportName=RegulatedFacility NOTES: Volume of wastewater treated includes wastewater from City of Atwater, Castle Airport, and the Winton Water and Sanitary District (WWSD). Disinfected tertiary treated effluent is discharged into the Atwater Drain, which leads to various farming operations and a wildlife refuge area.

Submittal Table 6-3 Retail: Wastewater Treatment and Discharge Within Service Area in 2020 No wastewater is treated or disposed of within the UWMP service area. The supplier will not complete the table below.

Wastewater
Treatment Plant
Name
Discharge
Location Name
or Identifier
Discharge
Location
Description
Wastewater
Discharge ID
Number
(optional) 2
Method of
Disposal
Drop down list
Does This
Plant Treat
Wastewater
Generated
Outside the
Service Area?
Drop down list
Treatment
Level
Drop down list
2020 volumes 1

Page 322 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
6-9

6.1.5.3 Recycled Water System Description
Legal Requirements:

CWC Section 10633 (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.

No recycled water is currently being used in the City’s service area.

6.1.5.4 Potential, Current, and Projected Recycled Water Uses Legal Requirements:

CWC Section 10633:
(b) A description of the quantity of treated wastewater that meets recycled water standards, is being discharged, and is otherwise available for use in a recycled water project. (d) A description and quantification of the potential uses of recycled water, including, but not limited to, agricultural irrigation, landscape irrigation, wildlife habitat enhancement, wetlands, industrial reuse, groundwater recharge, indirect potable reuse, and other appropriate uses, and a determination with regard to the technical and economic feasibility of serving those uses. (e) The projected use of recycled water within the supplier’s service area at the end of 5, 10, 15, and 20 years, and a description of the actual use of recycled water in comparison to uses previously projected pursuant to this subdivision.

In 1978, Joseph Gallo and the City of Atwater entered into an agreement where Gallo Farms agreed to accept and use up to 6 mgd of treated wastewater from the WWTP. Currently, about 90 percent of all treated wastewater is discharged into the Atwater Drain and disposed of through land application or disposal. The treated water travels approximately 5 miles downstream to the Joseph Gallo Ranch. During the irrigation season, 100 percent of the treated water from the Atwater Drain is used to irrigate crops on the Gallo Ranch. Unused water travels through the Gallo Ranch to the Bert Crane Sunshine Ranch that was purchased by the U.S. Fish and Wildlife Service (USFWS) and converted back to wetland habitat. The majority of the treated water reaching the Gallo Ranch during the winter months is diverted to the USFWS wetland habitat.

Currently, approximately 10 percent of the treated water is recycled back into the treatment plant for utility water use. Chlorinated water is pumped from the head of the chlorine contact chambers to the plant utility water supply system. Utility water is used for chlorine makeup water, sprayer water, landscape irrigation, and washdown water. All utility water eventually ends up being disposed of through land application or disposal. Because all the recycled water is used outside of the City service area, Tables 6-4 (DWR Table 6-4 R) and 6-5 (DWR Table 6-5 R) show that there are no beneficial uses of recycled water within the service area.

Page 323 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
6-10
Table 6-4 – Current and Projected Recycled Water Direct Beneficial Uses Within Service Area (DWR Table 6-4 R)
Potential Beneficial
Uses of Recycled
Water (Describe)
Amount of Potential
Uses of Recycled
Water (Quantity)
Include volume units 1
General
Description of 2020
Uses
Level of
Treatment
Drop down list
2020 1 2025 1 20301 20351 20401 20451
(opt)
Total: 0 0 0 0 0 0
NOTES:

Agricultural irrigation
Landscape irrigation (exc golf courses)
Commercial use
Golf course irrigation
Supplemental Water Added in 2020 (volume) Include units Source of 2020 Supplemental Water
Beneficial Use Type
Insert additional rows if needed.

Geothermal and other energy production
Other (Description Required)
2020 Internal Reuse
1 Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Reservoir water augmentation (IPR)
Direct potable reuse
Submittal Table 6-4 Retail: Recycled Water Direct Beneficial Uses Within Service Area Recycled water is not used and is not planned for use within the service area of the supplier.

The supplier will not complete the table below.

Name of Supplier Producing (Treating) the Recycled Water:

Name of Supplier Operating the Recycled Water Distribution System:

Wetlands or wildlife habitat
Groundwater recharge (IPR)
Industrial use
Seawater intrusion barrier
Recreational impoundment

Page 324 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
6-11
Table 6-5 – 2015 UWMP Recycled Water Use Projection Compared to 2020 Actual (DWR Table 6-5 R)

6.1.5.5 Actions to Encourage and Optimize Future Recycled Water Use Legal Requirements:

CWC Section 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 the following:
(g) A plan for optimizing the use of recycled water in the supplier’s service area, including actions to facilitate the installation of dual distribution systems, to promote recirculating uses, to facilitate the increased use of treated wastewater that meets recycled water standards, and to overcome any obstacles to achieving that increased use.

As the treated wastewater is currently being completely, beneficially used, there are no plans to recycle water for any other purposes. Table 6-6 (DWR Table 6-6) summarizes methods to expand future recycled water use.
2015 Projection for
2020 1 2020 Actual Use1
0 0
Submittal Table 6-5 Retail: 2015 UWMP Recycled Water Use Projection Compared to 2020 Actual
Recycled water was not used in 2015 nor projected for use in 2020.

The supplier will not complete the table below. If recycled water was not used in 2020, and was not predicted to be in 2015, then check the box and do not complete the table.

Beneficial Use Type
Agricultural irrigation
Reservoir water augmentation (IPR)
Landscape irrigation (exc golf courses)
Insert additional rows as needed.

Golf course irrigation
Commercial use
Industrial use
Geothermal and other energy production
Seawater intrusion barrier
Recreational impoundment
Wetlands or wildlife habitat
Groundwater recharge (IPR)
Total
Other (Description Required)
Direct potable reuse
NOTE:
1 Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 325 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
6-12
Table 6-6 – Methods to Expand Future Recycled Water Use (DWR Table 6-6)

6.1.6 Desalinated Water Opportunities
Legal Requirements:

CWC Section 10631(g):

Describe the opportunities for development of desalinated water, including, but not limited to, ocean water, brackish water, and groundwater, as a long-term supply.

Because the City is not located in a coastal area, seawater desalination is not applicable to the City and is not currently considered technically or economically feasible. In addition, the groundwater that underlies the City is not brackish in nature and does not require desalination. As such, the City does not have any plans to incorporate desalinated or treated brackish water into its supply portfolio.

6.1.7 Water Exchanges and Transfers
Legal Requirements:

CWC Section 10631(c):

Describe the opportunities for exchanges or transfers of water on a short-term or long-term basis.

The City is not in close enough proximity to other water producers to make exchange or transfers of water practical.

Name of Action Description
Planned
Implementation
Year
Expected Increase in
Recycled Water Use *

0 NOTES:

Submittal Table 6-6 Retail: Methods to Expand Future Recycled Water Use 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 UWMP
Add additional rows as needed
Total
*Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 326 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
6-13

6.1.8 Future Water Projects
Legal Requirements:

CWC Section 10631 (f):

Include a description of all water supply projects and water supply programs that may be undertaken by the urban water supplier to meet the total projected water use, as established pursuant to subdivision (a) of Section 10635. The urban water supplier shall include a detailed description of expected future projects and programs that the urban water supplier may implement to increase the amount of the water supply available to the urban water supplier in normal and single dry water years and for a period of drought lasting five consecutive water years. The description shall identify specific projects and include a description of the increase in water supply that is expected to be available from each project.

The description shall include an estimate with regard to the implementation timeline for each project or program.

The City has no water system updates since 2015 besides destroying Well 19. The City is currently in the process of bringing Well 20 back online by the end of 2022. All well sites, besides Well 21, are currently having TCP treatment installed. There are no planned future water supply projects for the City at this time.

Refer to Table 6-7 (DWR Table 6-7).

Table 6-7 – Expected Future Water Supply Projects or Program (DWR Table 6-7) Drop Down List (y/n) If Yes, Supplier Name
No expected future water supply projects or programs that provide a quantifiable increase to the agency's water supply. Supplier will not complete the table below.

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.

Submittal Table 6-7 Retail: Expected Future Water Supply Projects or Programs Joint Project with other suppliers?
NOTES:

Name of Future
Projects or Programs
Description
(if needed)
Planned
Implementation
Year
Expected
Increase in
Water Supply to
Supplier*
This may be a range
Planned for Use
in Year Type
Drop Down List
Provide page location of narrative in the UWMP
Add additional rows as needed
*Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 327 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
6-14

6.1.9 Summary of Existing and Planned Sources of Water
Legal Requirements:

CWC Section 10631:
(b) Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier over the same five-year increments described in subdivision (a), providing supporting and related information, including all of the following…
(b)(2) When multiple sources of water supply are identified, a description of the management of each supply in correlation with the other identified supplies. (h) An urban water supplier that relies upon a wholesale agency for a source of water shall provide the wholesale agency with water use projections from that agency for that source of water in five-year increments to 20 years or as far as data is available. The wholesale agency shall provide information to the urban water supplier for inclusion in the urban water supplier’s plan that identifies and quantifies, to the extent practicable, the existing and planned sources of water as required by subdivision (b), available from the wholesale agency to the urban water supplier over the same five-year increments, and during various water-year types in accordance with subdivision (f). An urban water supplier may rely upon water supply information provided by the wholesale agency in fulfilling the plan informational requirements of subdivisions (b) and (f).

This section describes the types of water that is supplied to the City and the quantity supplied by each water source.

6.1.9.1 Description of Supplies
Currently, the City exclusively uses groundwater for its potable water supply.

6.1.9.2 Quantification of Supplies
The actual (2020) water supplies for the City are summarized in Table 6-8 (DWR Table 6-8). The projected water supplies for the City are summarized in Table 6-9 (DWR Table 6-9).

Page 328 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
6-15
Table 6-8 – Water Supplies – Actual (DWR Table 6-8)
Table 6-9 – Water Supplies – Projected (DWR Table 6-9)

6.1.10 Special Conditions
Numerous special conditions may affect water supplies. The potential impacts of climate change on the City water supplies were discussed in Section 4.4. Regulatory conditions and other locally applicable criteria are not anticipated to affect the City’s water supply.

Water Supply
Drop down list
May use each category multiple
times.These are the only water
supply categories that will be
recognized by the WUEdata
online submittal tool
Actual Volume* Water Quality
Drop Down List
Total Right or
Safe Yield*
(optional)
Groundwater (not
desalinated) San Joaquin River 8,559 Drinking Water
8,559 0
Submittal Table 6-8 Retail: Water Supplies — Actual
Additional Detail on
Water Supply
2020
NOTES: Because groundwater is the sole source of water supply, actual volume was equal to 2020 water use (refer to Table 4-3 [DWR Table 4-1]).

Add additional rows as needed
Total
*Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Water Supply
Reasonably
Available
Volume
Total Right or
Safe Yield
(optional)
Reasonably
Available
Volume
Total Right or
Safe Yield
(optional)
Reasonably
Available
Volume
Total Right or
Safe Yield
(optional)
Reasonably
Available
Volume
Total Right or
Safe Yield
(optional)
Reasonably
Available
Volume
Total Right or
Safe Yield
(optional)
Groundwater (not
desalinated) San Joaquin River 9,642 10,324 11,056 11,838 9,642 0 10,324 0 11,056 0 11,838 0 0 0
NOTES: Because groundwater is the sole source of water supply, projected water supply is equal to the projected water use in Table 4-4 (DWR Table 4-2).

Submittal Table 6-9 Retail: Water Supplies — Projected
Additional Detail on
Water Supply
Projected Water Supply *
Report To the Extent Practicable
2025 2030 2035 2040 2045 (opt)
Total
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
Add additional rows as needed
*Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 329 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
6-16

6.2 Energy Use
Legal Requirements:

CWC Section 10631.2. (a):

In addition to the requirements of Section 10631, an urban water management plan shall include any of the following information that the urban water supplier can readily obtain:
(1) An estimate of the amount of energy used to extract or divert water supplies. (2) An estimate of the amount of energy used to convey water supplies to the water treatment plants or distribution systems.
(3) An estimate of the amount of energy used to treat water supplies. (4) An estimate of the amount of energy used to distribute water supplies through its distribution systems.
(5) An estimate of the amount of energy used for treated water supplies in comparison to the amount used for nontreated water supplies.
(6) An estimate of the amount of energy used to place water into or withdraw from storage. (7) Any other energy-related information the urban water supplier deems appropriate.

The City uses energy to pump groundwater from well sites into the distribution system. Energy intensity was calculated using the tables provided by DWR. DWR Table O-1B was selected for reporting the water delivery product energy usage. The energy use tables for retail water delivery, wastewater, and recycled water are provided in Appendix F.

Page 330 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
7-1
7 Water Service Reliability and Drought Risk Assessment The UWMPA requires that the UWMP address the reliability of the City's long term water supplies. This includes a description of supply constraints which may impact the supply. Also included is a comparison between the City’s supply and demand for a normal year, single-dry year, and five-consecutive year drought.

7.1 Water Service Reliability Assessment
Legal Requirements:

CWC Section 10635(a):

Expected water service reliability pursuant to Section 10631 of the Water Code is assessed in the following sections.

7.1.1 Service Reliability – Constraints on Water Sources Legal Requirements:

CWC Section 10631 (b)(1):

A detailed discussion of anticipated supply availability under a normal water year, single dry year, and droughts lasting at least five years, as well as more frequent and severe periods of drought, as described in the drought risk assessment. For each source of water supply, consider any information pertinent to the reliability analysis conducted pursuant to Section 10635, including changes in supply due to climate change.

Two issues could affect the City’s future water supply:

1. Groundwater is the sole water source for the City. The groundwater supply has declined over the last 80 years, requiring new, deeper wells and lowering of pumps in existing wells. A constraint here is the limited depth of numerous municipal water wells. If the declining groundwater trend is not reversed, it may cause a reduction in pumping capacity of the City’s water system.

2. Water quality. With the exception of City Well No. 21, all of the wells currently used to supply water to the public currently exceed the MCL for TCP. The City added treatment equipment to achieve compliance with California water quality standards. In the past, City wells have also had

Page 331 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
7-2
detections of DBCP and ethylene dibromide (EDB). Refer to the discussion in Section 6.1.2 Groundwater.

7.1.1.1 Legal
The supplies the City relies upon are neither in the process of adjudication nor the subject of any new legislation limiting them. Therefore, the City does not anticipate legal factors influencing the reliability of groundwater within the near term. However, that could change in the future, with the implementation of the GSP.

7.1.1.2 Environmental
The status of environmental regulation in California is routinely changing due to new legislation, endangered species statuses, and other factors. Should new environmental legislation come into existence, it could potentially impact the City's available supply. The recent water supply reductions in the Delta are an example of environmental water needs versus community water supplies. The City does not anticipate environmental factors influencing groundwater reliability.

7.1.1.3 Water Quality
Water quality testing, as summarized in the City’s Consumer Confidence Reports for 2017 – 2020 (provided in Appendix G) show that the City consistently meets or surpasses all U.S. Environmental Protection Agency (EPA) and State drinking water health standards, except for TCP. The City installed treatment equipment to achieve compliance with the TCP MCL. DBCP and EDB have also been detected in the water supply.

7.1.1.4 Climatic Factors
Climate change adds uncertainties to water supply planning. Changes to temperatures and precipitation patterns may impact water demands and supply availability. As discussed in Section 4.4, resource management strategies are being implemented to mitigate the effects of the potential impacts due to climate change.

7.1.2 Service Reliability – Year Type Characterization
This section addresses the reliability of the City’s water supply in average, single dry, and multiple dry water years. The City uses the following water year definitions from the DWR 2020 Guidebook:
• Normal Year: a year, or an averaged range of years, that most closely represents the average water supply available to the agency. For the purposes of this UWMP, the terms “normal” and “average” are used interchangeably.
• Single Dry Year: the year that represents the lowest water supply available to the agency. • Five-Consecutive-Year Drought: the driest five-year historical sequence for the Supplier (Water Code Section 10612).

The City relies on groundwater as its sole source for supply, which is not as susceptible to annual runoff fluctuations as surface water. The single dry year and five-consecutive-year drought supplies are representative of annual groundwater pumping during the recent 2014-2018 drought.

Table 7-1 (DWR Table 7-1) summarizes the base years for the average, single dry, and five-consecutivedry year periods. In addition, the available supply volume, and percent relative to the average year is

Page 332 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
7-3
listed. The average year was selected by evaluating the ten-year per capita water use and determining the year that best represents the average.

Table 7-1 – Basis of Water Year Data (DWR Table 7-1)
% of Average Supply
Average Year 2009 100%
Single-Dry Year 2015 70%
Consecutive Dry Years 1st Year 2014 70%
Consecutive Dry Years 2nd Year 2015 70%
Consecutive Dry Years 3rd Year 2016 70%
Consecutive Dry Years 4th Year 2017 80%
Consecutive Dry Years 5th Year 2018 90%
6,863
6,301
6,301
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 2019-
2020, use 2020
Available Supplies if
Year Type Repeats
Quantification of available supplies is not
compatible with this table and is provided
elsewhere in the UWMP.

Location __________________________
Quantification of available supplies is
provided in this table as either volume only,
percent only, or both.

Volume Available *
6,664
7,164
7,970
NOTES: Volume available was estimated based on the volume pumped for the base year listed. % of Average Water Supply is rounded to the nearest 10%.

Supplier may use multiple versions of Table 7-1 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 Table 7-1, in the "Note" section of each table, state that multiple versions of Table 7- 1 are being used and identify the particular water source that is being reported in each table. *Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3. 9,259

Page 333 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
7-4

7.1.3 Service Reliability – Supply and Demand Comparison Legal Requirements:

CWC Section 10635(a):

7.1.3.1 Water Service Reliability – Normal Year
The availability of the City’s water supplies in normal years are described in Chapter 6 and summarized in Table 7-2 (DWR Table 7-2). As shown in Table 7-2 (DWR Table 7-2), the City’s normal year supplies are adequate to meet projected normal year demands. The information in the table is taken from information presented previously in Tables 4-5 and 6-9 (DWR Tables 4-3 and 6-9). Because the City relies solely on groundwater, the demand and supply are set equal as long as the demand is less than the capacity of the wells in the City’s water system.

Table 7-2 – Normal Year Supply and Demand Comparison (DWR Table 7-2)

7.1.3.2 Water Service Reliability – Single Dry Year
The City’s water supply and demand for the single dry year are assumed to be 20 percent lower than normal year supply and demand for planning purposes, as shown in Table 7-1 (DWR Table 7-1). The projected single dry year supply and demand for 2020 through 2040 is presented in Table 7-3 (DWR Table 7-3). The projections indicate that the City’s single dry yearsupplies are adequate to meet projected single dry year demands.
2025 2030 2035 2040 2045 (Opt)
Supply totals
(autofill from Table 6-9) 9,642 10,324 11,056 11,838 0
Demand totals
(autofill from Table 4-3) 9,642 10,324 11,056 11,838 0
Difference
0 0 0 0 0
Submittal Table 7-2 Retail: Normal Year Supply and Demand Comparison NOTES:

Page 334 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
7-5
Table 7-3 – Single Dry Year Supply and Demand Comparison (DWR Table 7-3)

7.1.3.3 Water Service Reliability – Five-Consecutive-Year Drought Per CWC Section 10612, the five-consecutive-year drought is the driest five-year historical sequence for the supplier. The City’s water supply and demand for the five-consecutive-year drought are assumed to follow the pattern presented in Table 7-1 (DWR Table 7-1). As shown in Table 7-4 (DWR Table 7-4), the City’s five-consecutive-year drought supplies are adequate to meet projected demands. 2025 2030 2035 2040 2045 (Opt)
Supply totals* 6,749 7,227 7,739 8,287
Demand totals* 6,749 7,227 7,739 8,287
Difference 0 0 0 0 0
Submittal Table 7-3 Retail: Single Dry Year Supply and Demand Comparison NOTES: Supply total is equal to the projected Normal Year supply multiplied by 70% per DWR Table 7-1 estimates. Supply total is assumed to match with Demand total because groundwater pumping will operate to meet demands. *Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 335 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
7-6
Table 7-4 – Multiple Dry-Year Supply and Demand Comparison (DWR Table 7-4) 2025* 2030* 2035* 2040* 2045*
(Opt)
Supply totals 6,749 7,227 7,739 8,287
Demand totals 6,749 7,227 7,739 8,287
Difference 0 0 0 0 0
Supply totals 6,749 7,227 7,739 8,287
Demand totals 6,749 7,227 7,739 8,287
Difference 0 0 0 0 0
Supply totals 6,749 7,227 7,739 8,287
Demand totals 6,749 7,227 7,739 8,287
Difference 0 0 0 0 0
Supply totals 7,713 8,260 8,844 9,471
Demand totals 7,713 8,260 8,844 9,471
Difference 0 0 0 0 0
Supply totals 8,677 9,292 9,950 10,655
Demand totals 8,677 9,292 9,950 10,655
Difference 0 0 0 0 0
Supply totals
Demand totals
Difference 0 0 0 0 0
Submittal Table 7-4 Retail: Multiple Dry Years Supply and Demand Comparison First year
Second year
Third year
NOTES: Supply totals are equal to projected Normal Year supply multiplied by % Average Supply Factors in DWR Table 7-1. Supply total is assumed to match with Demand total because groundwater pumping will operate to meet demands.

Fourth year
Fifth year
Sixth year
(optional)
*Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 336 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
7-7

7.1.4 Description of Management Tools and Options
Legal Requirements:

CWC Section 10620(f):

An urban water supplier shall describe in the plan water management tools and options used by that entity that will maximize resources and minimize the need to import water from other regions.

The City is implementing water management tools and options to maximize local resources and minimize the need to import water from other regions. These tools and options include being a member of the MIUGSA and participating in the implementation of the GSP, and resource management strategies described in the MIRWMP. These tools and options are described in other sections of the UWMP.

Because groundwater is currently the sole source of water for the City and is projected to be a major source of water in the future, Tables 7-2 through 7-4 (DWR Tables 7-2 through 7-4) show water supply matching water demands. Groundwater wells will only be operated as needed to meet water demands, even though the groundwater supply could provide more water. This assumption should be updated when GSA allocations for the City are determined.

7.2 Drought Risk Assessment
Legal Requirements:

CWC Section 10635(b):

Every urban water supplier shall include, as part of its urban water management plan, a drought risk assessment for its water service to its customers as part of information considered in developing the demand management measures and water supply projects and programs to be included in the urban water management plan. The urban water supplier may conduct an interim update or updates to this drought risk assessment within the five-year cycle of its urban water management plan update. The drought risk assessment shall include each of the following:
(1) A description of the data, methodology, and basis for one or more supply shortage conditions that are necessary to conduct a drought risk assessment for a drought period that lasts five consecutive water years, starting from the year following when the assessment is conducted. (2) A determination of the reliability of each source of supply under a variety of water shortage conditions. This may include a determination that a particular source of water supply is fully reliable under most, if not all, conditions.
(3) A comparison of the total water supply sources available to the water supplier with the total projected water use for the drought period.
(4) Considerations of the historical drought hydrology, plausible changes on projected supplies and demands under climate change conditions, anticipated regulatory changes, and other locally applicable criteria.

This section provides a DRA based on the five driest consecutive years on record and plausible changes in climate, regulations, and other locally applicable criteria. A description of the data and methods used, basis for the supply shortage conditions, determination of the reliability of each source, and comparison of total water supplies and uses during a drought is provided below.

Page 337 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
7-8

7.2.1 DRA Data, Methods, and Basis for Water Shortage Conditions The data used for the DRA is historical data. Additional information is available in the Merced Subbasin GSP.

7.2.2 DRA Water Source Reliability
This DRA shows the total water supply as meeting water demands during a five-year drought period.

Unforeseen water supply and quality issues, potential regulations regarding new contaminants, and changes to the aquifer conditions may have adverse impacts on the water supply and should be monitored closely.

7.2.3 DRA Total Water Supply and Use Comparison
The total water supply and use comparison is shown in Table 7-5 (DWR Table 7-5). The comparison indicates that the City has sufficient water supply to meet projected demands during a five-year drought. The WSCP discusses measures for reducing water demands in case of water shortage conditions.

Page 338 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
7-9
Table 7-5 – Five-Year Drought Risk Assessment Tables (DWR Table 7-5) 2021 Total
Total Water Use 6,390
Total Supplies 6,390
Surplus/Shortfall w/o WSCP Action 0
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall) 0
Resulting % Use Reduction from WSCP action 0%
2022 Total
Total Water Use 6,478
Total Supplies 6,478
Surplus/Shortfall w/o WSCP Action 0
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall) 0
Resulting % Use Reduction from WSCP action 0%
2023 Total
Total Water Use 6,567
Total Supplies 6,567
Surplus/Shortfall w/o WSCP Action 0
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall) 0
Resulting % Use Reduction from WSCP action 0%
2024 Total
Total Water Use 7,608
Total Supplies 7,608
Surplus/Shortfall w/o WSCP Action 0
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall) 0
Resulting % Use Reduction from WSCP action 0%
2025 Total
Total Water Use 8,677
Total Supplies 8,677
Surplus/Shortfall w/o WSCP Action 0
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall) 0
Resulting % Use Reduction from WSCP action 0%
Submittal Table 7-5: Five-Year Drought Risk Assessment Tables to address Water Code Section 10635(b)
Planned WSCP Actions (use reduction and supply augmentation) Planned WSCP Actions (use reduction and supply augmentation) Planned WSCP Actions (use reduction and supply augmentation) Planned WSCP Actions (use reduction and supply augmentation) Planned WSCP Actions (use reduction and supply augmentation)

Page 339 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
8-1
8 Water Shortage Contingency Plan
In response to the severe drought of 2012-2016, legislation was adopted in 2018 mandating that the UWMP include a WSCP that provides a detailed proposal for assessing water supply availability and response actions to water shortage conditions. The WSCP is to be a stand-alone document which will allow for amending the plan without amending the 2020 UWMP. The City WSCP is provided in Appendix H. Refer to the WSCP for the following DWR Tables:
• DWR Tables 8-1: WSCP Levels
• DWR Tables 8-2: Demand Reduction Actions
• DWR Tables 8-3: Supply Augmentation and Other Actions

Page 340 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
9-1
9 Demand Management Measures
This section provides a comprehensive description of the water conservation programs that the City has implemented, is currently implementing, and plans to implement in order to meet its urban water use reduction targets.

9.1 Existing Demand Management Measures for Retail Suppliers Legal Requirements:

CWC Section 10631:
(e)Provide a description of the supplier’s water demand management measures. This description shall include all of the following:
(1)(A) For an urban retail water supplier, as defined in Section 10608.12, a narrative description that addresses the nature and extent of each water demand management measure implemented over the past five years. The narrative shall describe the water demand management measure that the supplier plans to implement to achieve its water use targets pursuant to Section 10608.20. (B)The narrative pursuant to this paragraph shall include descriptions of the following water demand management measures:
(i)Water waste prevention ordinances.
(ii)Metering.
(iii)Conservation pricing.
(iv)Public education and outreach.
(v)Programs to assess and manage distribution system real loss. (vi)Water conservation program coordination and staffing support. (vii)Other demand management measures that have a significant impact on water use as measured in gallons per capita per day, including innovative measures, if implemented.

The City employs a number of Demand Management Measures (DMMs) that promote conservation and reduce the water supply demand. These measures help reduce overdraft of the groundwater aquifer that the City utilizes and aided in the City’s attainment of the urban water use reduction targets discussed in Chapter 5. The following sections provide a description of the DMMs implemented by the City.

9.1.1 Water Waste Prohibition Ordinances
The City prohibits water waste through implementation of the Wastage of Water ordinance. The ordinance includes such prohibitions as not washing hardscapes, using a nozzle-controlled hose, irrigation practices, and others.

Page 341 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
9-2

9.1.2 Metering
Legal Requirements:

CWC Section 526:
(a) Notwithstanding any other provisions of law, an urban water supplier that, on or after January 1, 2004, receives water from the federal Central Valley Project under a water service contract or subcontract... shall do both of the following:
(1) On or before January 1, 2013, install water meters on all service connections to residential and nonagricultural commercial buildings... located within its service area.

CWC Section 527
(a) An urban water supplier that is not subject to Section 526 shall do both the following:
(1) Install water meters on all municipal and industrialservice connectionslocated within its service area on or before January 1, 2025.

In accordance with CWC Section 526, the City of Atwater has required installation of water meters on all new or replaced services installed since January 1, 1992. The City is partially metered for large industrial, commercial, multi-family, and landscape water services, and these services are read and billed monthly on a volume-of-use basis.

As previously stated, most residential water services are not metered, and, therefore, the water rates for residential customers are based on average use. The current water service rate structure is included in Appendix I. The rate structure is intended to raise sufficient funds to allow the City to properly maintain its water system. Funds to maintain and expand the system are also collected through development fees.

9.1.3 Conservation Pricing
The City’s rate structure includes a commodity rate for water usage of more than 19,000 gallons per month.

9.1.4 Public Education and Outreach

9.1.4.1 Public Information Programs
The City distributes public information regarding water issues in mass mailings to all water service customers, through the City's internet site, directly to walk-in customers at City Hall, and at the Public Works Department and the City Community Center. Also, when warranted, time-critical public information is dispersed through the local print media and radio station announcements.

Water use regulations and the annual Consumer Confidence Report (CCR) are mailed each year to all customers. The City takes advantage of these mailings to provide its customers additional information on water conservation and other demand management measures. Display cases and bulletin boards at City facilities augment the mailings by providing a permanent posting of the most current City mailings.

The City utility bill distributed to all water service customers is another vehicle used by Atwater for public education purposes. The bill mailing also contains public service announcements that are used to remind citizens of conservation and demand management measures. The City will be developing a system to track its future public information efforts and expenditures.

Page 342 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
9-3

9.1.4.2 School Education
The City has always welcomed local educational institutions and civic groups to tour City water production facilities and has made staff available for guidance and education during tours as requested. The City also encourages local educators to include demand management education in their curriculum where appropriate and provides materials and staff time for this effort whenever possible.

The effectiveness of the school education program is difficult to measure but educating the students at an early age regarding the value of water conservation and the need to protect the limited resource is essential in having an educated public that will participate in City water conservation programs, mandatory or voluntary. The City will develop a system to track its future school education efforts and expenditures.

9.1.5 Programs to Assess and Manage Distribution System Real Loss The City uses specialized equipment for leak detection as needed and has an ongoing program for maintenance and repair of its distribution system pipelines. The City's Supervisory Control and Data Acquisition (SCADA) system for the water production and distribution facilities provides significantly enhanced capabilities for accurately determining water production quantities. This information is invaluable in performing precise distribution system water audits. Conducting a complete water audit that compares actual water delivered and water produced is not possible at this time since not all connections are metered. The Public Works Department surveys and repairs pipelines on an as-needed basis. The City will begin tracking the amount of pipeline surveyed and repaired each year along with associated costs.

9.1.6 Water Conservation Program Coordination and Staffing Support City staff support water conservation activities such as issuing informational handouts, notices, and citations to customers for violating the City’s water conservation ordinances.

9.1.7 Other Demand Management Measures
The City supports additional programs that promote water conservation. These programs are further discussed in the subsequent sections.

9.1.7.1 Water Survey Programs
Upon request, City personnel will perform an interior and exterior inspection (audit) of a customer’s residence or facility to ascertain potential sources of water waste. City personnel will check for water leaks, nonmandatory control measures will be suggested, and education materials regarding the importance of water conservation will be provided. If available, the City will provide the customer with a water-conservation kit consisting of educational materials, faucet and shower aerators, toilet tank volume displacer, and leak detection tablets. In addition, the City may perform water audits on high-consumption accounts that are flagged during the billing process.

The City will program customer irrigation timers upon request. The City also uses this opportunity to discuss water conservation measures with the customer and give them conservation materials as applicable.

9.1.7.2 Residential Plumbing Retrofit
The City Building Department duties include enforcement of plumbing efficiency standards, which include installation of low-flow water fixtures, as part of the routine plan check procedure. This enforcement process includes specification of appropriate retrofit for low-flow fixtures for remodels. There is no State

Page 343 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
9-4
requirement or City ordinance requiring all residences to retrofit plumbing fixtures with low-flow water fixtures.

9.1.7.3 Landscape Conservation Programs and Incentives
Large landscape water users are designated as commercial for billing purposes and are therefore subject to higher base water rates depending on the meter size. The City tracks high consumption accounts and performs periodic surveys (audits) of the systems as requested or as the accounts are flagged during the billing process due to high consumption.

The City will perform water surveys (audits) for all water customers, including customers with large landscapes, which may include irrigation scheduling assistance and information (Section 9.1.7.1). The City also offers assistance with programming of irrigation timers to its customers with large landscapes (Section 9.1.6.1). During these visits with the customers, the City staff reviews and offers assistance with irrigation scheduling and efficiency and provides the customers with educational materials to assist with these functions and to promote water conservation.

9.1.7.4 High-Efficiency Washing Machine Rebate Program
The City does not offer a rebate program associated with the purchase of high-efficiency clothes washing or dishwashing machines but the electrical service providers, Pacific Gas and Electric (PG&E) and MID have historically offered rebates for clothes washing machines and dishwashing machines.

9.1.7.5 Conservation Programs for Commercial, Industrial, and Institutional A portion of the City’s large commercial, industrial, and institutional water customers are metered and billed monthly. Also, as previously stated, trained City staff is available to conduct water surveys for these customers, including review of all interior and exterior water use. Also, high-consumption users are flagged for further review and possible audit. Water Division staff has the responsibility to educate commercial and industrial users that overuse water for irrigation purposes. The staff can provide a variety of resources to help a commercial or industrial consumer conserve, including staff expertise and written materials. The City’s wastewater treatment plant staff monitors effluent water volume and constituents for treatment purposes but also views this interaction as an opportunity to promote conservation on the discharge side, thereby indirectly promoting conservation on the consumption side.

All City-maintained median strips and traffic islands that require plantings are landscaped with droughttolerant plants. The City maintains a list of approved plantings for public right-of-way. Criteria for inclusion on the list include low water consumption and drought tolerance.

As part of the normal City plan check process, project plans and specifications are reviewed for conformance with sound water conservation practices and compliance with all codes. Enforceable corrections or modifications are noted and returned with the plans and specifications. The Public Works Department staff member with appropriate expertise communicates non-enforceable recommendations directly to the responsible professional for the project. The project developer is also provided with a copy of the City’s list of approved plantings for public right-of-way. City staff also works with project developers to implement programs to separate potable water systems from irrigation systems whenever feasible.

Page 344 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
9-5

9.2 Reporting Implementation

9.2.1 Implementation over the Past Five Years
Legal Requirements:

CWC Section 10631:
(e) Provide a description of the supplier’s water demand management measures. This description shall include all of the following:
(1)(A) …a narrative description that addresses the nature and extent of each water demand management measure implemented over the past five years.

The City is committed to implementing programs designed to conserve and protect the quantity and quality of its groundwater resource. The overall reduction of water and compliance with the SB X7-7 2020 target indicate that the programs adopted in the community have been effective. The detailed activities and expenditure information for each program have not been closely tracked in the past. The City is planning to track and record these activities and costs in the future to determine the effectiveness of each program.

9.2.2 Implementation to Achieve Water Use Targets
Legal Requirements:

CWC Section 10631:
(f)(1)(A) For an urban retail water supplier, as defined in Section 10608.12, a narrative description that addresses the nature and extent of each water demand management measure implemented over the past five years. The narrative shall describe the water demand management measure that the supplier plans to implement to achieve its water use targets pursuant to Section 10608.20.

As discussed in Chapter 5, the City has met the SB X7-7 2020 target. The City will continue to implement the above described DMMs to reduce water demands and protect the groundwater supply. .

Page 345 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
10-1
10 Plan Adoption, Submittal, and Implementation
This chapter provides information regarding addressing the CWC requirements for public hearing, the UWMP adoption process, submitting and adopting the UWMP and making the document available to the public, plan implementation, and the process for amending an adopted UWMP.

10.1 Inclusion of All 2020 Data
As indicated in Chapter 2, the City uses a calendar year for water supply and demand accounting. This 2020 UWMP includes data through December 2020.

10.2 Notice of Public Hearing

10.2.1 Notice to Cities and Counties
Legal Requirements:

CWC Section 10621:
(b) Every urban water supplier required to prepare a plan shall…at least 60 days prior to the public hearing on the plan…notify any city or county within which the supplier provides waters supplies that the urban water supplier will be reviewing the plan and considering amendments or changes to the plan.

Water Code Section 10642
…The urban water supplier shall provide notice of the time and place of hearing to any city or county within which the supplier provides water supplies. A privately owned water supplier shall provide an equivalent notice within its service area…
The City has provided formal written notification to Merced County, MID, and other appropriate agencies that the City’s UWMP was being updated for 2020. As shown in Table 10-1 (DWR Table 10-1), this notification was provided at least 60 days prior to the public hearing of the plan. Copies of the Final UWMP will be provided to Merced County and MID no later than 30 days after its submission to DWR. Copies of notification letters are included in Appendix C.

Page 346 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
10-2
Table 10-1 – Notification to Cities and Counties (DWR Table 10-1) City Name 60 Day Notice
Notice of Public
Hearing
Merced Irrigation
District
Merced County
Farm Bureau
Atwater
Chamber of
Commerce

Atwater
Elementary
School District
Merced Unified
High School
District
County Name
Drop Down List 60 Day Notice
Notice of Public
Hearing
Merced County

NOTES:

Submittal Table 10-1 Retail: Notification to Cities and Counties
Add additional rows as needed
Add additional rows as needed

Page 347 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
10-3

10.2.2 Notice to the Public
Legal Requirements:

CWC Section 10642:
…Prior to adopting either [the plan or water shortage contingency plan], the urban water supplier shall make both of the plan and the water shortage contingency plan available for public inspection and shall hold a public hearing or hearings thereon. Prior to any of these hearings, notice of the time and place of the hearing shall be published within the jurisdiction of the publicly owned water supplier pursuant to Section 6066 of the Government Code [see below]. The urban water supplier shall provide notice of the time and place of a hearing to any city or county within which the supplier provides water supplies.

Government Code section 6066
Publication of notice pursuant to this section shall be once a week for two successive weeks. Two publications in a newspaper published once a week or oftener, with at least five days intervening between the respective publication dates not counting such publication dates, are sufficient. The period of notice commences upon the first day of publication and terminates at the end of the fourteenth day, including therein the first day.

The City is committed to encouraging the active involvement of diverse social, cultural, and economic elements of its citizenry. On XXXXXX and XXXXXXX, the City placed a notice in the local newspaper stating that its UWMP was being updated and a WSCP was prepared, and that a public hearing would be conducted to take testimony from members of the community. A copy of this notification is included in Appendix C. The Draft 2020 UWMP and Draft WSCP were made available for public inspection at the City of Atwater. In addition, the City also posted a copy of the Draft 2020 UWMP and Draft WSCP on its website.

10.3 Public Hearing and Adoption
Legal Requirements:

CWC Section 10642:
…Prior to adopting either, the [plan or water shortage contingency plan], the urban water supplier shall make both the plan and the water shortage contingency plan available for public inspection and shall hold a public hearing or hearings thereon.

Water Code Section 10608.26
(a) In complying with this part, an urban retail water supplier shall conduct at least one public hearing to accomplish all of the following:
(1) Allow community input regarding the urban retail water supplier’s implementation plan for complying with this part.
(2) Consider the economic impacts of the urban retail water supplier’s implementation plan for complying with this part.
(3) Adopt a method, pursuant to subdivision (b) of Section 10608.20 for determining its urban water use target.

10.3.1 Public Hearing
A public hearing for the UWMP and WSCP was held on MONTH DAY, YEAR at the City Council Chamber.

The hearing provided an opportunity for the City’s customers, residents, and employees to learn and ask

Page 348 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
10-4
questions about the current and future water supply of the City. The plan adoption by City Council occurred on MONTH DAY, YEAR. The City Resolution is included in Appendix J.

10.3.2 Adoption
Legal Requirements:

CWC Section 10642:
…After the hearing or hearings, the plan or water shortage contingency plan shall be adopted as prepared or as modified after the hearing.

This UWMP was adopted by the City Council on MONTH DAY, YEAR. The WSCP was adopted by the City Council on MONTH DAY, YEAR. A copy of the adopted resolutions is provided in Appendix J.

10.4 Plan Submittal
Legal Requirements:

CWC Section 10621:
(e) Each urban water supplier shall update and submit its 2020 plan to the department by July 1, 2021… CWC Section 10644:
(a)(1) An urban water supplier shall submit to the department, the California State Library, and any city or county within which the supplier provides water supplies a copy of its plan no later than 30 days after adoption.

CWC Section 10635:
(c) The urban water supplier shall provide that portion of its urban water management plan prepared pursuant to this article to any city or county within which it provides water supplies no later than 60 days after the submission of its urban water management plan.

10.4.1 Submitting a UWMP and Water Shortage Contingency Plan to DWR A copy of the adopted 2020 UWMP will be submitted electronically to DWR within 30 days of adoption.

10.4.2 Electronic Data Submittal
Legal Requirements:

CWC Section 10644 (a)(2):

The plan, or amendments to the plan, submitted to the department … shall be submitted electronically and shall include any standardized forms, tables, or displays specified by the department.

This 2020 UWMP, including the WSCP, and associated data will be submitted electronically to DWR using the WUEdata submittal tool.

10.4.3 Submitting a UWMP, including WSCP, to the California State Library The 2020 UWMP, including the WSCP, will be submitted on CD or hardcopy format to the California State Library within 30 days of adoption.

Page 349 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
10-5

10.4.4 Submitting a UWMP to Cities and Counties
The 2020 UWMP will be submitted in electronic format to Merced County and MID within 30 days of adoption.

10.5 Public Availability
Legal Requirements:

CWC Section 10645:
(a) Not later than 30 days after filing a copy of its plan with the department, the urban water supplier and the department shall make the plan available for public review during normal business hours. (b) Not later than 30 days after filing a copy of its water shortage contingency plan with the department, the urban water supplier and the department shall make the plan available for public review during normal business hours.

Within 30 days of submitting the UWMP to DWR, the adopted UWMP will be available for public review during normal business hours at the City of Atwater. The City will also post a copy of the adopted UWMP on its website (www.atwater.org).

10.6 Notification to Public Utilities Commission
Legal Requirements:

CWC Section 10621 (c):

An urban water supplier regulated by the Public Utilities Commission shall include its most recent plan and water shortage contingency plan as part of the supplier’s general rate case filings.

The City is not regulated by the California Public Utilities Commission.

10.7 Amending an Adopted UWMP or Water Shortage Contingency Plan Legal Requirements:

CWC Section 10621:
(d) The amendments to, or changes in, the plan shall be adopted and filed in the manner set forth in Article 3 (commencing with Section 10640).

CWC Section 10644:
(a)(1) Copies of amendments or changes to the plans shall be submitted to the department, the California State Library, and any city or county within which the supplier provides water supplies within 30 days after adoption.

10.7.1 Amending a UWMP
The plan may be updated at any time when the urban water supplier believes significant changes have occurred in population, land use, and/or water sources that may affect the contents of the plan. If major changes are made to this 2020 UWMP, the City will hold an additional public hearing and City Council will re-adopt the plan. Copies of amendments or changes to the plan shall be submitted to DWR, the California State Library, Merced County, and MID within 30 days of adoption.

Page 350 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
10-6

10.7.2 Amending a Water Shortage Contingency Plan
Legal Requirements:

CWC Section 10644 (b):

If an urban water supplier revises its water shortage contingency plan, the supplier shall submit to the department a copy of its water shortage contingency plan prepared…no later than 30 days after adoption, in accordance with protocols for submission and using electronic reporting tools developed by the department.

If the City revises the WSCP after DWR has approved the 2020 UWMP, copies of amendments or changes to the plans will be submitted electronically to DWR through the WUEdata Portal within 30 days of its adoption.

Copies of the amended WSCP will also be sent to the California State Library, Merced County, and MID within 30 days of adoption.

Page 351 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
11-1
11 References
[1] 2018 Merced Integrated Regional Water Management Plan Update, Woodard & Curran, February 2019.

Page 352 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
A
Appendix A
DWR UWMP Tables

Page 353 of 824 ends

Public Water System
Number
Public Water System
Name
Number of Municipal
Connections 2020
Volume of
Water Supplied
2020 *
CA24100001 City of Atwater 8,407 8,559
8,407 8,559
Submittal Table 2-1 Retail Only: Public Water Systems
NOTES: Units of measure is AF. Source for number of municipal connections 2020 is State Waterboard 2020 Electronic Annual Report. Source for volume of water supplied 2020 is monthly water production data provided by City.

TOTAL
Add additional rows as needed
* Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 354 of 824 ends

Water Supplier is also a member
of a RUWMP
Water Supplier is also a member
of a Regional Alliance
Regional Urban Water Management Plan
(RUWMP)
Submittal Table 2-2: Plan Identification
NOTES:

Individual UWMP
Name of RUWMP or Regional Alliance
if applicable
(select from drop down list)
Select
Only One Type of Plan

Page 355 of 824 ends

Supplier is a wholesaler
Supplier is a retailer
UWMP Tables are in calendar years
UWMP Tables are in fiscal years
Unit AF
NOTES:

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 drop down)
* Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 356 of 824 ends

Submittal Table 2-4 Retail: Water Supplier Information Exchange The retail Supplier has informed the following wholesale supplier(s) of projected water use in accordance with Water Code Section 10631.

Wholesale Water Supplier Name
Add additional rows as needed
N/A
NOTES:

Page 357 of 824 ends

2020 2025 2030 2035 2040 2045(opt)
31,648 33,889 36,289 38,859 41,611
Submittal Table 3-1 Retail: Population - Current and Projected Population
Served
NOTES: (1) 2020 population from DOF, Table E-5. (2) Projected populations assume a growth rate of 7.1% every five years, based on the 5-year growth rate from 2015 - 2020 where population increased from 29,555 to 31,648.

Page 358 of 824 ends

Use Type
Drop down list
May select each use multiple times
These are the only Use Types that will be
recognized by the WUEdata online
submittal tool
Additional Description
(as needed)
Level of Treatment
When Delivered
Drop down list
Volume2
Single Family Drinking Water 4,068
Multi-Family Drinking Water 844
Commercial Drinking Water 2,174
Other Drinking Water 1,474
8,559
Submittal Table 4-1 Retail: Demands for Potable and Non-Potable1 Water - Actual 2020 Actual
NOTES: Volumes for single family, multi-family, and commercial were estimated because these use types are only partially metered. Volumes were increased based on the ratio of total service connections and the number of metered service connections for each use type.

Page 359 of 824 ends

Use Type
Drop down list
May select each use multiple times
These are the only Use Types that will be recognized by the WUEdata online submittal tool
2025 2030 2035 2040
2045
(opt)
Single Family 4,582 4,907 5,254 5,626
Multi-Family 951 1,018 1,090 1,167
Commercial 2,449 2,622 2,808 3,007
Other 1,660 1,777 1,903 2,038
9,642 10,324 11,056 11,838 0
Projected Water Use2
Report To the Extent that Records are Available
Submittal Table 4-2 Retail: Use for Potable and Non-Potable1 Water - Projected Additional Description
(as needed)
Add additional rows as needed
1 Recycled water demands are NOT reported in this table. Recycled water demands are reported in Table 6-4. 2 Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

NOTES:

TOTAL

Page 360 of 824 ends

2020 2025 2030 2035 2040 2045 (opt)
Potable Water, Raw, Other
Non-potable
From Tables 4-1 R and 4-2 R
8,559 9,642 10,324 11,056 11,838 0
Recycled Water Demand1
From Table 6-4
0 0 0 0 0 0
Optional Deduction of
Recycled Water Put Into LongTerm Storage2
TOTAL WATER USE 8,559 9,642 10,324 11,056 11,838 0
Submittal Table 4-3 Retail: Total Water Use (Potable and Non-Potable) NOTES:
1 Recycled water demand fields will be blank until Table 6-4 is complete 2 Long term storage means water placed into groundwater or surface storage that is not removed from storage in the same year. Supplier may deduct recycled water placed in long-term storage from their reported demand. This value is manually entered into Table 4-3.

Page 361 of 824 ends

Reporting Period Start Date
(mm/yyyy) Volume of Water Loss 1,2
07/2016 1,980
07/2017 2,764
07/2018 3,162
07/2019 1,388
07/2020 Not available
Submittal Table 4-4 Retail: Last Five Years of Water Loss Audit Reporting
NOTES: Water loss audit reporting started in 2016. Water loss audit report for 07/2020 - 06/2021 was not available when the 2020 UWMP was completed.
1 Taken from the field "Water Losses" (a combination of apparent losses and real losses) from the AWWA worksheet. 2
Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 362 of 824 ends

Are Lower Income Residential Demands Included In Projections? Drop down list (y/n)
Yes
Submittal Table 4-5 Retail Only: Inclusion in Water Use Projections NOTES:

Page 363 of 824 ends

10-15
year
2000 2009 317
5 Year 2005 2009 302
Submittal Table 5-1 Baselines and Targets Summary
From SB X7-7 Verification Form
Retail Supplier or Regional Alliance Only
*All cells in this table should be populated manually from the supplier's SBX7-7 Verification Form and reported in Gallons per Capita per Day (GPCD) NOTES:
254
Baseline
Period Start Year * End Year *
Average
Baseline
GPCD*
Confirmed
2020 Target*

Page 364 of 824 ends

Actual
2020 GPCD*
2020 TOTAL
Adjustments*
Adjusted 2020
GPCD*
(Adjusted if
applicable)
241 0 241 254 Yes
NOTES:
2020 Confirmed
Target GPCD*
Did Supplier
Achieve
Targeted
Reduction for
2020? Y/N
2020 GPCD
Submittal Table 5-2: 2020 Compliance From
SB X7-7 2020 Compliance Form
Retail Supplier or Regional Alliance Only
*All cells in this table should be populated manually from the supplier's SBX7-7 2020 Compliance Form and reported in Gallons per Capita per Day (GPCD)

Page 365 of 824 ends

Groundwater Type
Drop Down List
May use each category
multiple times
Location or Basin Name 2016* 2017* 2018* 2019* 2020*
Alluvial Basin San Joaquin River 6,664 7,164 7,970 8,157 8,559 6,664 7,164 7,970 8,157 8,559
Add additional rows as needed
Submittal Table 6-1 Retail: Groundwater Volume Pumped
Supplier does not pump groundwater.

The supplier will not complete the table below.

NOTES:

TOTAL
All or part of the groundwater described below is desalinated. * Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 366 of 824 ends

Name of
Wastewater
Collection
Agency
Wastewater
Volume Metered
or Estimated?
Drop Down List
Volume of
Wastewater
Collected from
UWMP Service
Area 2020 *
Name of
Wastewater
Treatment
Agency Receiving
Collected
Wastewater
Treatment Plant
Name
Is WWTP Located
Within UWMP
Area?
Drop Down List
Is WWTP
Operation
Contracted to a
Third Party?
(optional)
Drop Down List
City of Atwater Metered 3,663 City of Atwater
Atwater Regional
Wastewater
Treatment
Facility
No
3,663
Total Wastewater Collected from
Service Area in 2020:

Submittal Table 6-2 Retail: Wastewater Collected Within Service Area in 2020 There is no wastewater collection system. The supplier will not complete the table below.

Page 367 of 824 ends

Wastewater
Treated
Discharged
Treated
Wastewater
Recycled Within
Service Area
Recycled
Outside of
Service Area
Instream Flow
Permit
Requirement
Total 0 0 0 0 0
1 Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3. 2 If the Wastewater Discharge ID Number is not available to the UWMP preparer, access the SWRCB CIWQS regulated facility website at https://ciwqs.waterboards.ca.gov/ciwqs/readOnly/CiwqsReportServlet?inCommand=reset&reportName=RegulatedFacility NOTES: Volume of wastewater treated includes wastewater from City of Atwater, Castle Airport, and the Winton Water and Sanitary District (WWSD). Disinfected tertiary treated effluent is discharged into the Atwater Drain, which leads to various farming operations and a wildlife refuge area.

Page 368 of 824 ends

Potential Beneficial
Uses of Recycled Water
(Describe)
Amount of Potential
Uses of Recycled Water
(Quantity)
Include volume units 1
General Description
of 2020 Uses
Level of
Treatment
Drop down list
2020 1 2025 1 20301 20351 20401 20451
(opt)
Total: 0 0 0 0 0 0
NOTES:

Geothermal and other energy production
Other (Description Required)
2020 Internal Reuse
1 Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

The supplier will not complete the table below.

Name of Supplier Producing (Treating) the Recycled Water:

Name of Supplier Operating the Recycled Water Distribution System:

Wetlands or wildlife habitat
Groundwater recharge (IPR)
Industrial use
Seawater intrusion barrier
Recreational impoundment

Page 369 of 824 ends

2015 Projection for
2020 1 2020 Actual Use1
0 0
Submittal Table 6-5 Retail: 2015 UWMP Recycled Water Use Projection Compared to 2020 Actual
Recycled water was not used in 2015 nor projected for use in 2020.

The supplier will not complete the table below. If recycled water was not used in 2020, and was not predicted to be in 2015, then check the box and do not complete the table.

Beneficial Use Type
Agricultural irrigation
Reservoir water augmentation (IPR)
Landscape irrigation (exc golf courses)
Insert additional rows as needed.

Page 370 of 824 ends

Name of Action Description
Planned
Implementation
Year
Expected Increase in
Recycled Water Use *

0 NOTES:

Provide page location of narrative in UWMP
Add additional rows as needed
Total
*Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 371 of 824 ends

Drop Down List (y/n) If Yes, Supplier Name
No expected future water supply projects or programs that provide a quantifiable increase to the agency's water supply.

Supplier will not complete the table below.

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.

Submittal Table 6-7 Retail: Expected Future Water Supply Projects or Programs Joint Project with other suppliers?
NOTES:

Name of Future Projects
or Programs
Description
(if needed)
Planned
Implementation
Year
Expected Increase
in Water Supply
to Supplier*
This may be a range
Planned for Use in
Year Type
Drop Down List
Provide page location of narrative in the UWMP
Add additional rows as needed
*Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 372 of 824 ends

Water Supply
Drop down list
May use each category multiple
times.These are the only water supply
categories that will be recognized by
the WUEdata online submittal tool
Actual Volume* Water Quality
Drop Down List
Total Right or Safe
Yield* (optional)
Groundwater (not desalinated) San Joaquin River 8,559 Drinking Water 8,559 0
Submittal Table 6-8 Retail: Water Supplies — Actual
Additional Detail on
Water Supply
2020
NOTES: Because groundwater is the sole source of water supply, actual volume was equal to 2020 water use (refer to Table 4-3 [DWR Table 4-1]).

Add additional rows as needed
Total
*Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 373 of 824 ends

Water Supply
Reasonably
Available
Volume
Total Right or
Safe Yield
(optional)
Reasonably
Available
Volume
Total Right or
Safe Yield
(optional)
Reasonably
Available
Volume
Total Right or
Safe Yield
(optional)
Reasonably
Available
Volume
Total Right or
Safe Yield
(optional)
Reasonably
Available
Volume
Total Right or
Safe Yield
(optional)
Groundwater (not desalinated) San Joaquin River 9,642 10,324 11,056 11,838 9,642 0 10,324 0 11,056 0 11,838 0 0 0
NOTES: Because groundwater is the sole source of water supply, projected water supply is equal to the projected water use in Table 4-4 (DWR Table 4-2).

These are the only water supply
categories that will be recognized by
the WUEdata online submittal tool
Add additional rows as needed
*Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 374 of 824 ends

% of Average Supply
Average Year 2009 100%
Single-Dry Year 2015 70%
Consecutive Dry Years 1st Year 2014 70%
Consecutive Dry Years 2nd Year 2015 70%
Consecutive Dry Years 3rd Year 2016 70%
Consecutive Dry Years 4th Year 2017 80%
Consecutive Dry Years 5th Year 2018 90%
6,863
6,301
6,301
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 2019-2020,
use 2020
Available Supplies if
Year Type Repeats
Quantification of available supplies is not
compatible with this table and is provided
elsewhere in the UWMP. Location
__________________________
Quantification of available supplies is provided in
this table as either volume only, percent only, or
both.

Volume Available *
6,664
7,164
7,970
NOTES: Volume available was estimated based on the volume pumped for the base year listed. % of Average Water Supply is rounded to the nearest 10%.

Supplier may use multiple versions of Table 7-1 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 Table 7-1, in the "Note" section of each table, state that multiple versions of Table 7-1 are being used and identify the particular water source that is being reported in each table. *Units of measure (AF, CCF, MG ) must remain consistent throughout the UWMP as reported in Table 2-3. 9,259

Page 375 of 824 ends

2025 2030 2035 2040 2045 (Opt)
Supply totals
(autofill from Table 6-9) 9,642 10,324 11,056 11,838 0
Demand totals
(autofill from Table 4-3) 9,642 10,324 11,056 11,838 0
Difference 0 0 0 0 0
Submittal Table 7-2 Retail: Normal Year Supply and Demand Comparison NOTES:

Page 376 of 824 ends

2025 2030 2035 2040 2045 (Opt)
Supply totals* 6,749 7,227 7,739 8,287
Demand totals* 6,749 7,227 7,739 8,287
Difference 0 0 0 0 0
Submittal Table 7-3 Retail: Single Dry Year Supply and Demand Comparison NOTES: Supply total is equal to the projected Normal Year supply multiplied by 70% per DWR Table 7-1 estimates. Supply total is assumed to match with Demand total because groundwater pumping will operate to meet demands.
*Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 377 of 824 ends

2025* 2030* 2035* 2040* 2045* (Opt)
Supply totals 6,749 7,227 7,739 8,287
Demand totals 6,749 7,227 7,739 8,287
Difference 0 0 0 0 0
Supply totals 6,749 7,227 7,739 8,287
Demand totals 6,749 7,227 7,739 8,287
Difference 0 0 0 0 0
Supply totals 6,749 7,227 7,739 8,287
Demand totals 6,749 7,227 7,739 8,287
Difference 0 0 0 0 0
Supply totals 7,713 8,260 8,844 9,471
Demand totals 7,713 8,260 8,844 9,471
Difference 0 0 0 0 0
Supply totals 8,677 9,292 9,950 10,655
Demand totals 8,677 9,292 9,950 10,655
Difference 0 0 0 0 0
Supply totals
Demand totals
Difference 0 0 0 0 0
Submittal Table 7-4 Retail: Multiple Dry Years Supply and Demand Comparison First year
Second year
Third year
NOTES: Supply totals are equal to projected Normal Year supply multiplied by % Average Supply Factors in DWR Table 7-1. Supply total is assumed to match with Demand total because groundwater pumping will operate to meet demands.

Fourth year
Fifth year
Sixth year
(optional)
*Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Table 2-3.

Page 378 of 824 ends

2021 Total
Total Water Use 6,390
Total Supplies 6,390
Surplus/Shortfall w/o WSCP Action 0
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall) 0
Resulting % Use Reduction from WSCP action 0%
2022 Total
Total Water Use 6,478
Total Supplies 6,478
Surplus/Shortfall w/o WSCP Action 0
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall) 0
Resulting % Use Reduction from WSCP action 0%
2023 Total
Total Water Use 6,567
Total Supplies 6,567
Surplus/Shortfall w/o WSCP Action 0
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall) 0
Resulting % Use Reduction from WSCP action 0%
2024 Total
Total Water Use 7,608
Total Supplies 7,608
Surplus/Shortfall w/o WSCP Action 0
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall) 0
Resulting % Use Reduction from WSCP action 0%
2025 Total
Total Water Use 8,677
Total Supplies 8,677
Surplus/Shortfall w/o WSCP Action 0
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall) 0
Resulting % Use Reduction from WSCP action 0%
Submittal Table 7-5: Five-Year Drought Risk Assessment Tables to address Water Code Section 10635(b)
Planned WSCP Actions (use reduction and supply augmentation) Planned WSCP Actions (use reduction and supply augmentation) Planned WSCP Actions (use reduction and supply augmentation) Planned WSCP Actions (use reduction and supply augmentation) Planned WSCP Actions (use reduction and supply augmentation)

Page 379 of 824 ends

Shortage
Level
Percent Shortage
Range
Shortage Response Actions
(Narrative description)
1 Up to 10% Prohibit outdoor water wasting activities. Timely leak repair requirement.

Education Campaign, Voluntary.
2 Up to 20% Includes Level 1 restrictions. Increase landscape irrigation limits. 3 Up to 30%
Includes Levels 1 and 2 restrictions. Prohibit the use of water which cause flooding. Vehicle washing limitations. No street cleaning. 4 Up to 40% Includes Levels 1, 2, and 3 restrictions. Prohibits all landscape irrigation. 5 Up to 50% Includes Levels 1, 2, 3, and 4 restrictions. Water served upon request at restaurants. Commercial lodging establishments and decorative water feature limitations. Initial filling of a new swimming pool is allowed with a permit. 6 >50% Includes Levels 1, 2, 3, 4, and 5 restrictions.

NOTES:

Submittal Table 8-1: Water Shortage Contingency Plan Levels

Page 380 of 824 ends

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?
Include units used (volume
type or percentage)
Additional Explanation or Reference
(optional)
Penalty, Charge, or
Other Enforcement?
For Retail Suppliers Only
Drop Down List
1 Expand Public Information Campaign 0 gpcd No
1 Other - Customers must repair leaks,
breaks, and malfunctions in a timely
manner
Supports other demand
reduction actions.

Repair all water leaks within five (5) days of
notification by the City Public Works Department
unless other arrangements are made with the City
Public Works Dept.

Yes
1 Other - Require automatic shut of
hoses
Supports other demand
reduction actions.

Use a hand-held hose equipped with a positive
shut-off nozzle or bucket to water landscaped
areas.

Yes
1 Other Supports other demand
reduction actions.

Wash vehicle using a bucket, not exceeding 5
gallons in capacity. Avoid washing during hot
conditions when additional water is required due
to evaporation.

Yes
1 Other - Prohibit use of potable water
for washing hard surfaces
Supports other demand
reduction actions.

Exception allowed for alleviating safety or
sanitation hazards, in which case, areas shall be
washed from water contained in a bucket or
container not exceeding 5 gallons in capacity.

Yes
1 Other 37 gpcd Complete installation of water meters to service connections.

No
2 Landscape - Limit landscape irrigation
to specific days 31 gpcd 3 days/week. Yes
2 Landscape - Limit landscape irrigation
to specific times
Supports other demand
reduction actions.

Customers shall not irrigate any lawn or landscape
area between the hours of 10:00 am and 5:00 pm
on any day of the week.

Yes
3 Landscape - Limit landscape irrigation
to specific days 22 gpcd 2 days/week Yes
4 Landscape - Limit landscape irrigation
to specific days 22 gpcd 1 day/week Yes
5-6 Landscape - Limit landscape irrigation
to specific days 22 gpcd Prohibit all landscape irrigation. Yes 5-6
Water Features - Restrict water use
for decorative water features, such as
fountains
Supports other demand
reduction actions.

Stop operating ornamental fountains or similar
decorative water features unless recycled water is
used.

Yes
5-6 CII - Restaurants may only serve
water upon request
Supports other demand
reduction actions.

Serve and refill water in restaurants and other
food service establishments only upon request. Yes
5-6 Other water feature or swimming
pool restriction
Supports other demand
reduction actions.

Initial filling of swimming pools or otherwise of the
full capacity of a pool over 2,500 gallons is
prohibited. Emptying and refilling all pools is
prohibited.

Yes
5-6 CII - Lodging establishment must
offer opt out of linen service
Supports other demand
reduction actions.

Offers guests in hotels, motels, and other
commercial lodging establishments the option of
not laundering towels and linens daily.

Yes
Submittal Table 8-2: Demand Reduction Actions
NOTES: For the first violation, the consumer shall be issued an administrative with a warning. For the second violation, the consumer shall be issued an administrative citation in the amount of $50. For the third violation, the consumer shall be issued an administrative citation in the amount of $75. For the fourth violation, the consumer shall be issued an administrative citation in the amount of $250.

Add additional rows as needed

Page 381 of 824 ends

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?
Include units used (volume
type or percentage)
Additional Explanation or Reference
(optional)
1-6 Expand Public Information Campaign 0%
The City distributes public information regarding water issues in mass mailing to all water services customers, through the City's Internet site, directly to walk-in
customers at City Hall, and at the Public Works
Department and the City Community Center.
1-6 Improve Customer Billing 0% The City encourages water conservation through its water and sewer service rate structure.
1-6 Other Actions (describe) 0%
Offers water use surveys. Upon request, the City
personnel will perform an interior and exterior
inspection of a customer's residence or facility in order to ascertain potential sources of water sources of water waste.
1-6 Other Actions (describe) 0%
Decrease line flushing. The City decreases the frequency and duration of water system flushing maintenance
activities.
1-6 Other Actions (describe) 0%
Reduce system water loss. The City increases efforts to correct water system losses, including repairing leaks
and eliminating illicit connections.
1-6 Other Actions (describe) 0%
Increase water waste patrols. The City conducts more
frequent patrols to discourage water wasting and
correct water wasting practices in the community.
1-6 Other Actions (describe) 0%
Increase frequency of meter reading. The City may
increase frequency of meter reading to better track
services that may have leaks or usually high water
consumption.
1-6 Other Actions (describe) 0%
Moratorium or net zero demand increase on new
connections. The City will temporarily limit or ban new water service connections within the service area.

Submittal Table 8-3: Supply Augmentation and Other Actions Add additional rows as needed
NOTES:

Page 382 of 824 ends

City Name 60 Day Notice
Notice of Public
Hearing
Merced Irrigation
District
Merced County
Farm Bureau
Atwater Chamber
of Commerce

Atwater
Elementary School
District
Merced Unified
High School
District
County Name
Drop Down List 60 Day Notice
Notice of Public
Hearing
Merced County

NOTES:

Submittal Table 10-1 Retail: Notification to Cities and Counties
Add additional rows as needed
Add additional rows as needed

Page 383 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
B
Appendix B
DWR UWMP Checklist

Page 384 of 824 ends

Retail Wholesale
2020 Guidebook
Location
Water Code
Section Summary as Applies to UWMP Subject
2020 UWMP Location
(Optional Column for
Agency Review Use)
x x
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
Section 1.1

Page 1 ends

x x
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.

Summary Section 1.5

Page 1 ends

x x
Section 2.2 10620(b)
Every person that becomes an urban water supplier shall adopt an urban water management plan within one year after it has become an urban water supplier.

Plan Preparation Section 2.1.1

Page 2 ends

x x
Section 2.6 10620(d)(2)
Coordinate the preparation of its plan with other appropriate agencies in the area, including other water suppliers that share a common source, water management agencies, and relevant public agencies, to the extent practicable.

Plan Preparation Section 2.4.2

Page 2 ends

x x
Section 2.6.2 10642
Provide supporting documentation that the water 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 Section 2.4.2

Page 2 ends

x
Section 2.6, Section

6.1 10631(h)
Retail suppliers will include documentation that they have provided their wholesale supplier(s) - if any - with water use projections from that source.

System Supplies Section 2.4.1

Page 2 ends

x
Section 2.6 10631(h)
Wholesale suppliers will include documentation that they have provided their urban water suppliers with identification and quantification of the existing and planned sources of water available from the wholesale to the urban supplier during various water year types.

System Supplies N/A
x x Section 3.1 10631(a) Describe the water supplier service area. System Description Section 3.2

Page 3 ends

x x Section 3.3 10631(a) Describe the climate of the service area of the supplier. System Description Section 3.3

Page 3 ends

x x Section 3.4 10631(a) Provide population projections for 2025, 2030, 2035, 2040 and optionally 2045. System Description Section 3.4.1Page 3-5 to 3-6 x x
Section 3.4.2 10631(a) Describe other social, economic, and demographic factors affecting the supplier’s water management planning. System Description Section 3.4.2 Page 3-6 x x
Sections 3.4 and

5.4 10631(a) Indicate the current population of the service area. System Description and Baselines and Targets
Section 3.4.1

Page 3 ends

x x Section 3.5 10631(a) Describe the land uses within the service area. System Description Section 3.5

Page 3 ends

x x Section 4.2 10631(d)(1) Quantify past, current, and projected water use, identifying the uses among water use sectors. System Water Use Section 4.2Page 4-1 x x Section 4.2.4 10631(d)(3)(
C)
Retail suppliers shall provide data to show the distribution loss standards were met. System Water Use Section 4.2.4Page 4-3 x x
Section 4.2.6 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 Section 4.2.6

Page 4 ends

x x Section 4.2.6 10631(d)(4)(
B)
Provide citations of codes, standards, ordinances, or plans used to make water use projections. System Water Use Section 4.2.6Page 4-6 to 4-7 x optional Section 4.3.2.4 10631(d)(3)(
A)
Report the distribution system water loss for each of the 5 years preceding the plan update. System Water Use Section 4.2.4Page 4-3 x optional Section 4.4 10631.1(a) Include projected water use needed for lower income housing projected in the service area of the supplier. System Water Use Section 4.3Page 4-9 x x Section 4.5 10635(b) Demands under climate change considerations must be included as part of the drought risk assessment. System Water Use Section 4.4Page 4-10 to 4-11 x
Chapter 5 10608.20(e)
Retail suppliers shall provide baseline daily per capita water use, urban water use target, interim urban water use target, and compliance daily per capita water use, along with the bases for determining those estimates, including references to supporting data.

Baselines and Targets Section 5.1

Page 5 ends

x Chapter 5 10608.24(a) Retail suppliers shall meet their water use target by December 31, 2020. Baselines and Targets Section 5.4Page 5-3
x
Section 5.1 10608.36
Wholesale suppliers shall include an assessment of present and proposed future measures, programs, and policies to help their retail water suppliers achieve targeted water use reductions.

Baselines and Targets N/A
x
Section 5.2 10608.24(d)(
2)
If the retail supplier adjusts its compliance GPCD using weather normalization, economic adjustment, or extraordinary events, it shall provide the basis for, and data supporting the adjustment.

Baselines and Targets N/A
x
Section 5.5 10608.22
Retail suppliers’ per capita daily water use reduction shall be no less than 5 percent of base daily per capita water use of the 5 year baseline. This does not apply if the suppliers base GPCD is at or below 100.

Baselines and Targets Section 5.1

Page 5 ends

Page 1 of 5 ends

Page 385 of 824 ends

Retail Wholesale
2020 Guidebook
Location
Water Code
Section Summary as Applies to UWMP Subject
2020 UWMP Location
(Optional Column for
Agency Review Use)
x
Section 5.5 and
Appendix E 10608.4
Retail suppliers shall report on their compliance in meeting their water use targets. The data shall be reported using a
standardized form in the SBX7-7 2020 Compliance Form.

Baselines and Targets Section 5.4

Page 5 ends

x x
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.

System Supplies Section 6.1

Page 6 ends

x x
Sections 6.1 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 Section 6.1.10

Page 6 ends

x x
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 Section 6.1.9.2

Page 6 ends

x x Section 6.1.1 10631(b)(3) Describe measures taken to acquire and develop planned sources of water. System Supplies Section 6.1.9Page 6-14 x x
Section 6.2.8 10631(b)
Identify and quantify the existing and planned sources of water available for 2020, 2025, 2030, 2035, 2040 and optionally 2045.

System Supplies Section 6.1.9.2

Page 6 ends

x x Section 6.2 10631(b) Indicate whether groundwater is an existing or planned source of water available to the supplier. System Supplies Section 6.1.2Page 6-2 x x
Section 6.2.2 10631(b)(4)(
A)
Indicate whether a groundwater sustainability plan or
groundwater management plan has been adopted by the water supplier or if there is any other specific authorization for groundwater management. Include a copy of the plan or
authorization.

System Supplies Section 6.1.2.1

Page 6 ends

x x Section 6.2.2 10631(b)(4)(
B) Describe the groundwater basin. System Supplies Section 6.1.2.2Page 6-3 x x
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 Section 6.1.2.2

Page 6 ends

x x
Section 6.2.2.1 10631(b)(4)(
B)
For unadjudicated basins, indicate whether or not the
department has identified the basin as a high or medium priority. Describe efforts by the supplier to coordinate with sustainability or groundwater agencies to achieve sustainable groundwater conditions.

System Supplies Section 6.1.2.1

Page 6 ends

x x
Section 6.2.2.4 10631(b)(4)(
C)
Provide a detailed description and analysis of the location, amount, and sufficiency of groundwater pumped by the urban water supplier for the past five years
System Supplies
Section 6.1.2.2 and

6.1.2.3

Page 6 ends

x x
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 Section 6.1.2.2 and

6.1.2.3

Page 6 ends

x x 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 Section 6.1.7Page 6-12 x x
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)
Section 6.1.5

Page 6 ends

x x Section 6.2.5 10633(c) Describe the recycled water currently being used in the supplier's service area.

System Supplies
(Recycled Water)
Section 6.1.5.4

Page 6 ends

x x
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)
Section 6.1.5.4

Page 6 ends

x x
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 a description of the actual use of recycled water in comparison to uses previously projected.

System Supplies
(Recycled Water)
Section 6.1.5.4

Page 6 ends

x x
Section 6.2.5 10633(f)
Describe the actions 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.

System Supplies
(Recycled Water)
Section 6.1.5.5

Page 6 ends

x x 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)
Section 6.1.5.5

Page 6 ends

x x Section 6.2.6 10631(g) Describe desalinated water project opportunities for long-term supply. System Supplies Section 6.1.6Page 6-12
x x
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)
Section 6.1.5.2

Page 6 ends

x x
Section 6.2.8,
Section 6.3.7 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 5 consecutive water years.

System Supplies Section 6.1.8

Page 6 ends

x x
Section 6.4 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
Section 6.2

Page 6 ends

Page 2 of 5 ends

Page 386 of 824 ends

Retail Wholesale
2020 Guidebook
Location
Water Code
Section Summary as Applies to UWMP Subject
2020 UWMP Location
(Optional Column for
Agency Review Use)
x x
Section 7.2 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
Section 7.1.1.3

Page 7 ends

x x
Section 7.2.4 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
Section 7.1.4

Page 7 ends

x x
Section 7.3 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 water supplier with the total projected water use over the next 20 years.

Water Supply Reliability
Assessment
Section 7.1

Page 7 ends

x x
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
Section 7.2

Page 7 ends

x x
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 5 consecutive years.

Water Supply Reliability
Assessment
Section 7.2.1

Page 7 ends

x x
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
Section 7.2.2

Page 7 ends

x x
Section 7.3 10635(b)(3)
Include a comparison of the total water supply sources
available to the water supplier with the total projected water use for the drought period.

Water Supply Reliability
Assessment
Section 7.2.3

Page 7 ends

x x
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
Section 7.2.3

Page 7 ends

x x
Chapter 8 10632(a) Provide a water shortage contingency plan (WSCP) with specified elements below.

Water Shortage
Contingency Planning Appendix H
x x
Chapter 8 10632(a)(1) Provide the analysis of water supply reliability (from Chapter 7 of Guidebook) in the WSCP
Water Shortage
Contingency Planning
Appendix H, Section 2

Page 1 ends

x x
Section 8.10 10632(a)(10)
Describe reevaluation and improvement procedures for
monitoring and evaluation the water shortage contingency plan to ensure risk tolerance is adequate and appropriate water shortage mitigation strategies are implemented.

Water Shortage
Contingency Planning
Appendix H, Section 12

Page 16 ends

x x
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
Appendix H, Section 3.1

Page 3 ends

x x
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
Appendix H, Section 3.2

Page 4 ends

x x
Section 8.3 10632(a)(3)(
A)
Define six standard water shortage levels of 10, 20, 30, 40, 50 percent shortage and greater than 50 percent 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
Appendix H, Section 4

Page 6 ends

x x
Section 8.3 10632(a)(3)(
B)
Suppliers with an existing water shortage contingency plan that uses different water shortage levels must cross reference their categories with the six standard categories.

Water Shortage
Contingency Planning
Appendix H, Section 4

Page 6 ends

x x
Section 8.4 10632(a)(4)(
A)
Suppliers with water shortage contingency plans that align with the defined shortage levels must specify locally appropriate supply augmentation actions.

Water Shortage
Contingency Planning
Appendix H, Section 5.1

Page 7 ends

x x
Section 8.4 10632(a)(4)(
B)
Specify locally appropriate demand reduction actions to adequately respond to shortages.

Water Shortage
Contingency Planning
Appendix H, Section 5.2

Page 8 ends

x x
Section 8.4 10632(a)(4)(
C) Specify locally appropriate operational changes. Water Shortage Contingency Planning Appendix H, Section 5.3

Page 11 ends

x x
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
Appendix H, Section 5.4

Page 11 ends

x x
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
Appendix H, Section 5.2

Page 11 ends

x x
Section 8.4.6 10632.5 The plan shall include a seismic risk assessment and mitigation plan.

Water Shortage
Contingency Plan
Appendix H, Section 6

Page 13 ends

x x
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
Appendix H, Section 7

Page 13 ends

Page 3 of 5 ends

Page 387 of 824 ends

Retail Wholesale
2020 Guidebook
Location
Water Code
Section Summary as Applies to UWMP Subject
2020 UWMP Location
(Optional Column for
Agency Review Use)
x x
Section 8.5 and 8.6
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
Appendix H, Section 7

Page 13 ends

x
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
Appendix H, Section 8

Page 14 ends

x
Section 8.7 10632(a)(7)(
A)
Describe the legal authority that empowers the supplier to enforce shortage response actions.

Water Shortage
Contingency Planning
Appendix H, Section 9

Page 14 ends

x x
Section 8.7 10632(a)(7)(
B)
Provide a statement that the supplier will declare a water shortage emergency Water Code Chapter 3.

Water Shortage
Contingency Planning
Appendix H, Section 9

Page 14 ends

x x
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
Appendix H, Section 9

Page 14 ends

x x
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
Appendix H, Section 10

Page 15 ends

x x
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
Appendix H, Section 10

Page 15 ends

x
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
Appendix H, Section 10

Page 15 ends

x
Section 8.9 10632(a)(9)
Retail suppliers must describe the monitoring and reporting requirements and procedures that ensure appropriate data is collected, tracked, and analyzed for purposes of monitoring customer compliance.

Water Shortage
Contingency Planning
Appendix H, Section 11

Page 16 ends

x
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
Appendix H, Section

12.1

Page 16 ends

x x
Sections 8.12 and

10.4 10635(c)
Provide supporting documentation that Water Shortage
Contingency Plan has been, or will be, provided to any city or county within which it provides water, no later than 30 days after the submission of the plan to DWR.

Plan Adoption,
Submittal, and
Implementation
Appendix H, Section

12.2.7

Page 18 ends

x x
Section 8.12 10632(c)
Make available the Water Shortage Contingency Plan to
customers and any city or county where it provides water within 30 after adopted the plan.

Water Shortage
Contingency Planning
Appendix H, Section

12.2.9

Page 19 ends

x
Sections 9.1 and

9.3 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
Section 9.1.7

Page 9 ends

x
Sections 9.2 and

9.3 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
Section 9-2.1

Page 9 ends

x
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
Section 10.3

Page 10 ends

x x
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 urban water supplier will be reviewing the plan and considering amendments or changes to the plan. Reported in Table 10-1.

Plan Adoption,
Submittal, and
Implementation
Section 10.2.1

Page 10 ends

x x
Section 10.4 10621(f) Each urban water supplier shall update and submit its 2020 plan to the department by July 1, 2021.

Plan Adoption,
Submittal, and
Implementation
Section 10.4.1

Page 10 ends

x x
Sections 10.2.2,

10.3, and 10.5 10642
Provide supporting documentation that the urban water supplier made the plan and contingency plan available for public inspection, published notice of the public hearing, and held a public hearing about the plan and contingency plan.

Plan Adoption,
Submittal, and
Implementation
Section 10

Page 10 ends

x x
Section 10.2.2 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.

Plan Adoption,
Submittal, and
Implementation
Section 10.3.1

Page 10 ends

x x
Section 10.3.2 10642 Provide supporting documentation that the plan and contingency plan has been adopted as prepared or modified.

Plan Adoption,
Submittal, and
Implementation
Section 10.3.2

Page 10 ends

x x
Section 10.4 10644(a) Provide supporting documentation that the urban water supplier has submitted this UWMP to the California State Library.

Plan Adoption,
Submittal, and
Implementation
Section 10.4.3

Page 10 ends

x x
Section 10.4 10644(a)(1)
Provide supporting documentation that the urban water supplier has submitted this UWMP to any city or county within which the supplier provides water no later than 30 days after adoption.

Plan Adoption,
Submittal, and
Implementation
Section 10.4.4

Page 10 ends

Page 4 of 5 ends

Page 388 of 824 ends

Retail Wholesale
2020 Guidebook
Location
Water Code
Section Summary as Applies to UWMP Subject
2020 UWMP Location
(Optional Column for
Agency Review Use)
x x
Sections 10.4.1 and

10.4.2 10644(a)(2) The plan, or amendments to the plan, submitted to the department shall be submitted electronically.

Plan Adoption,
Submittal, and
Implementation
Section 10.7.2

Page 10 ends

x x
Section 10.5 10645(a)
Provide supporting documentation that, not later than 30 days after filing a copy of its plan with the department, the supplier has or will make the plan available for public review during normal business hours.

Plan Adoption,
Submittal, and
Implementation
Section 10.5

Page 10 ends

x x
Section 10.5 10645(b)
Provide supporting documentation that, not later than 30 days after filing a copy of its water shortage contingency plan with the department, the supplier has or will make the plan available for public review during normal business hours.

Plan Adoption,
Submittal, and
Implementation
Section 10.5

Page 10 ends

x x
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
Section 10.6

Page 10 ends

x x
Section 10.7.2 10644(b) If revised, submit a copy of the water shortage contingency plan to DWR within 30 days of adoption.

Plan Adoption,
Submittal, and
Implementation
Section 10.7.2

Page 10 ends

Page 5 of 5 ends

Page 389 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
C
Appendix C
Notice of Preparation and Outreach Documents

Page 390 of 824 ends

Page 391 of 824 ends

Page 392 of 824 ends

Page 393 of 824 ends

Page 394 of 824 ends

Page 395 of 824 ends

Page 396 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
D
Appendix D
Water Loss Audits

Page 397 of 824 ends

Water Audit Report for:

Reporting Year:

All volumes to be entered as: MILLION GALLONS (US) PER YEAR Master Meter and Supply Error Adjustments
WATER SUPPLIED Pcnt: Value:

Volume from own sources: 5 2,197.909 MG/Yr 3 MG/Yr
Water imported: n/a 0.000 MG/Yr MG/Yr
Water exported: n/a 0.000 MG/Yr MG/Yr
Enter negative % or value for under-registration
WATER SUPPLIED: 2,197.909 MG/Yr Enter positive % or value for over-registration .

AUTHORIZED CONSUMPTION
Billed metered: 1 450.151 MG/Yr
Billed unmetered: 3 1,075.000 MG/Yr
Unbilled metered: n/a 0.000 MG/Yr Pcnt: Value:

Unbilled unmetered: 1 27.474 MG/Yr 1.25% MG/Yr
AUTHORIZED CONSUMPTION: 1,552.625 MG/Yr
WATER LOSSES (Water Supplied - Authorized Consumption) 645.284 MG/Yr Apparent Losses Pcnt: Value:

Unauthorized consumption: 5.495 MG/Yr 0.25% MG/Yr
Customer metering inaccuracies: 3 4.547 MG/Yr 1.00% MG/Yr Systematic data handling errors: 1.125 MG/Yr 0.25% MG/Yr Apparent Losses: 11.167 MG/Yr
Real Losses (Current Annual Real Losses or CARL)
Real Losses = Water Losses - Apparent Losses: 634.117 MG/Yr WATER LOSSES: 645.284 MG/Yr

NON-REVENUE WATER
NON-REVENUE WATER: 672.758 MG/Yr
= Water Losses + Unbilled Metered + Unbilled Unmetered

SYSTEM DATA
Length of mains: 9 97.6 miles
Number of active AND inactive service connections: 9 7,230 Service connection density: 74 conn./mile main
Yes
Average length of customer service line: 25.0 ft
Average operating pressure: 3 50.0 psi

COST DATA
Total annual cost of operating water system: 10 $3,131,740 $/Year Customer retail unit cost (applied to Apparent Losses): 4 $0.91 Variable production cost (applied to Real Losses): 5 $351.05 $/Million gallons WATER AUDIT DATA VALIDITY SCORE:

PRIORITY AREAS FOR ATTENTION:
1: Volume from own sources
2: Billed metered
3: Billed unmetered
Based on the information provided, audit accuracy can be improved by addressing the following components:
$/1000 gallons (US)
<----------- Enter grading in column 'E' and 'J' ----------> Default option selected for unauthorized consumption - a grading of 5 is applied but not displayed *** YOUR SCORE IS: 47 out of 100 ***
A weighted scale for the components of consumption and water loss is included in the calculation of the Water Audit Data Validity Score Default option selected for Systematic data handling errors - a grading of 5 is applied but not displayed Average length of customer service line has been set to zero and a data grading score of 10 has been applied Are customer meters typically located at the curbstop or property line? AWWA Free Water Audit Software:

Reporting Worksheet
Default option selected for Unbilled unmetered - a grading of 5 is applied but not displayed 2017 7/2016 - 6/2017
City of Atwater (2410001)
?
?
?
?
?
? Click to access definition
?
?
?
?
?
?
Please enter data in the white cells below. Where available, metered values should be used; if metered values are unavailable please estimate a value. Indicate your confidence in the accuracy of the input data by grading each component (n/a or 1-10) using the drop-down list to the left of the input cell. Hover the mouse over the cell to obtain a description of the grades ?
?
?
?
?
?
(length of service line, beyond the property boundary,
that is the responsibility of the utility)
Use buttons to select
percentage of water supplied
OR
value
Click here: ?
for help using option
buttons below
?
?
?
?
+
+ Click to add a comment
WAS v5.0
+
+
+
+
+
+
American Water Works Association.

Copyright © 2014, All Rights Reserved.
?
?
?
+
+
+
+
+
+
+
+
+
+
+
+
+
?
To select the correct data grading for each input, determine the highest grade where the utility meets or exceeds all criteria for that grade and all grades below it.

Use Customer Retail Unit Cost to value real losses
AWWA Free Water Audit Software v5.0 Reporting Worksheet 1

Page 398 of 824 ends

Page 399 of 824 ends

Page 400 of 824 ends

Water Audit Report for:

Reporting Year:

All volumes to be entered as: MILLION GALLONS (US) PER YEAR Master Meter and Supply Error Adjustments
WATER SUPPLIED Pcnt: Value:

Volume from own sources: 5 2,578.229 MG/Yr 3 MG/Yr
Water imported: n/a 0.000 MG/Yr MG/Yr
Water exported: n/a 0.000 MG/Yr MG/Yr
Enter negative % or value for under-registration
WATER SUPPLIED: 2,578.229 MG/Yr Enter positive % or value for over-registration .

AUTHORIZED CONSUMPTION
Billed metered: 1 649.700 MG/Yr
Billed unmetered: 1 1,021.520 MG/Yr
Unbilled metered: n/a MG/Yr Pcnt: Value:

Unbilled unmetered: 6.445 MG/Yr 1.25% MG/Yr
AUTHORIZED CONSUMPTION: 1,677.665 MG/Yr
WATER LOSSES (Water Supplied - Authorized Consumption) 900.564 MG/Yr Apparent Losses Pcnt: Value:

Unauthorized consumption: 6.446 MG/Yr 0.25% MG/Yr
Customer metering inaccuracies: 3 6.563 MG/Yr 1.00% MG/Yr Systematic data handling errors: 5 1.624 MG/Yr 0.25% MG/Yr Apparent Losses: 14.632 MG/Yr
Real Losses (Current Annual Real Losses or CARL)
Real Losses = Water Losses - Apparent Losses: 885.932 MG/Yr WATER LOSSES: 900.564 MG/Yr

NON-REVENUE WATER
NON-REVENUE WATER: 907.009 MG/Yr
= Water Losses + Unbilled Metered + Unbilled Unmetered

SYSTEM DATA
Length of mains: 9 97.6 miles
Number of active AND inactive service connections: 9 7,616 Service connection density: 78 conn./mile main
Yes
Average length of customer service line: ft
Average operating pressure: 5 50.0 psi

COST DATA
Total annual cost of operating water system: 10 $3,673,078 $/Year Customer retail unit cost (applied to Apparent Losses): 4 $1.22 Variable production cost (applied to Real Losses): 5 $324.91 $/Million gallons WATER AUDIT DATA VALIDITY SCORE:

PRIORITY AREAS FOR ATTENTION:
1: Volume from own sources
2: Billed metered
3: Billed unmetered
Average length of customer service line has been set to zero and a data grading score of 10 has been applied Are customer meters typically located at the curbstop or property line? AWWA Free Water Audit Software:

Reporting Worksheet

6.445
2018 7/2017 - 6/2018
Atwater (2410001)
Add a grading value for 1 parameter(s) to enable an audit score to be calculated Default option selected for Systematic data handling errors - a grading of 5 is applied but not displayed Based on the information provided, audit accuracy can be improved by addressing the following components:
$/1000 gallons (US)
<----------- Enter grading in column 'E' and 'J' ----------> Default option selected for unauthorized consumption - a grading of 5 is applied but not displayed ?
?
?
?
?
? Click to access definition
?
?
?
?
?
?
Please enter data in the white cells below. Where available, metered values should be used; if metered values are unavailable please estimate a value. Indicate your confidence in the accuracy of the input data by grading each component (n/a or 1-10) using the drop-down list to the left of the input cell. Hover the mouse over the cell to obtain a description of the grades ?
?
?
?
?
?
(length of service line, beyond the property boundary,
that is the responsibility of the utility)
Use buttons to select
percentage of water supplied
OR
value
Click here: ?
for help using option
buttons below
?
?
?
?
+
+ Click to add a comment
WAS v5.0
+
+
+
+
+
+
American Water Works Association.

Use Customer Retail Unit Cost to value real losses
AWWA Free Water Audit Software v5.0 Reporting Worksheet 1

Page 401 of 824 ends

Page 402 of 824 ends

Page 403 of 824 ends

Page 404 of 824 ends

Water Audit Report for:

Reporting Year:

All volumes to be entered as: MILLION GALLONS (US) PER YEAR Master Meter and Supply Error Adjustments
WATER SUPPLIED Pcnt: Value:

Volume from own sources: 5 2,593.050 MG/Yr 3 MG/Yr
Water imported: n/a 0.000 MG/Yr MG/Yr
Water exported: n/a 0.000 MG/Yr MG/Yr
Enter negative % or value for under-registration
WATER SUPPLIED: 2,593.050 MG/Yr Enter positive % or value for over-registration .

AUTHORIZED CONSUMPTION
Billed metered: 1 738.550 MG/Yr
Billed unmetered: 1 817.810 MG/Yr
Unbilled metered: n/a MG/Yr Pcnt: Value:

Unbilled unmetered: 5 6.483 MG/Yr 1.25% MG/Yr
AUTHORIZED CONSUMPTION: 1,562.843 MG/Yr
WATER LOSSES (Water Supplied - Authorized Consumption) 1,030.207 MG/Yr Apparent Losses Pcnt: Value:

Unauthorized consumption: 6.483 MG/Yr 0.25% MG/Yr
Customer metering inaccuracies: 3 7.460 MG/Yr 1.00% MG/Yr Systematic data handling errors: 5 1.846 MG/Yr 0.25% MG/Yr Apparent Losses: 15.789 MG/Yr
Real Losses (Current Annual Real Losses or CARL)
Real Losses = Water Losses - Apparent Losses: 1,014.418 MG/Yr WATER LOSSES: 1,030.207 MG/Yr

NON-REVENUE WATER
NON-REVENUE WATER: 1,036.690 MG/Yr
= Water Losses + Unbilled Metered + Unbilled Unmetered

SYSTEM DATA
Length of mains: 9 97.6 miles
Number of active AND inactive service connections: 9 7,639 Service connection density: 78 conn./mile main
Yes
Average length of customer service line: ft
Average operating pressure: 5 50.0 psi

COST DATA
Total annual cost of operating water system: 10 $3,585,025 $/Year Customer retail unit cost (applied to Apparent Losses): 5 $1.53 Variable production cost (applied to Real Losses): 5 $358.95 $/Million gallons WATER AUDIT DATA VALIDITY SCORE:

Reporting Worksheet

6.483
2018-2019 7/2018 - 6/2019
City of Atwater (2410001)
?
?
?
?
?
? Click to access definition
?
?
?
?
?
?
Please enter data in the white cells below. Where available, metered values should be used; if metered values are unavailable please estimate a value. Indicate your confidence in the accuracy of the input data by grading each component (n/a or 1-10) using the drop-down list to the left of the input cell. Hover the mouse over the cell to obtain a description of the grades ?
?
?
?
?
?
(length of service line, beyond the property boundary,
that is the responsibility of the utility)
Use buttons to select
percentage of water supplied
OR
value
Click here: ?
for help using option
buttons below
?
?
?
?
+
+ Click to add a comment
WAS v5.0
+
+
+
+
+
+
American Water Works Association.

Use Customer Retail Unit Cost to value real losses
AWWA Free Water Audit Software v5.0 Reporting Worksheet 1

Page 405 of 824 ends

Page 406 of 824 ends

Page 407 of 824 ends

Page 408 of 824 ends

Page 409 of 824 ends

Water Audit Report for:

Reporting Year:

All volumes to be entered as: MILLION GALLONS (US) PER YEAR Master Meter and Supply Error Adjustments
WATER SUPPLIED Pcnt: Value:

Volume from own sources: 5 2,801.590 MG/Yr 3 MG/Yr
Water imported: n/a 0.000 MG/Yr MG/Yr
Water exported: n/a 0.000 MG/Yr MG/Yr
Enter negative % or value for under-registration
WATER SUPPLIED: 2,801.590 MG/Yr Enter positive % or value for over-registration .

AUTHORIZED CONSUMPTION
Billed metered: 1 1,181.913 MG/Yr
Billed unmetered: 3 1,132.293 MG/Yr
Unbilled metered: n/a 0.000 MG/Yr Pcnt: Value:

Unbilled unmetered: 5 35.020 MG/Yr 1.25% MG/Yr
AUTHORIZED CONSUMPTION: 2,349.226 MG/Yr
WATER LOSSES (Water Supplied - Authorized Consumption) 452.364 MG/Yr Apparent Losses Pcnt: Value:

Unauthorized consumption: 7.004 MG/Yr 0.25% MG/Yr
Customer metering inaccuracies: 3 11.939 MG/Yr 1.00% MG/Yr Systematic data handling errors: 5 2.955 MG/Yr 0.25% MG/Yr Apparent Losses: 21.897 MG/Yr
Real Losses (Current Annual Real Losses or CARL)
Real Losses = Water Losses - Apparent Losses: 430.467 MG/Yr WATER LOSSES: 452.364 MG/Yr

NON-REVENUE WATER
NON-REVENUE WATER: 487.384 MG/Yr
= Water Losses + Unbilled Metered + Unbilled Unmetered

SYSTEM DATA
Length of mains: 9 97.6 miles
Number of active AND inactive service connections: 9 7,742 Service connection density: 79 conn./mile main
Yes
Average length of customer service line: ft
Average operating pressure: 5 50.0 psi

COST DATA
Total annual cost of operating water system: 10 $4,682,937 $/Year Customer retail unit cost (applied to Apparent Losses): 5 $1.53 Variable production cost (applied to Real Losses): 5 $388.48 $/Million gallons WATER AUDIT DATA VALIDITY SCORE:

Reporting Worksheet
Default option selected for Unbilled unmetered - a grading of 5 is applied but not displayed

7.004
2019-2020 7/2019 - 6/2020
City of Atwater (CA2410001)
*** YOUR SCORE IS: 48 out of 100 ***
A weighted scale for the components of consumption and water loss is included in the calculation of the Water Audit Data Validity Score Default option selected for Systematic data handling errors - a grading of 5 is applied but not displayed Based on the information provided, audit accuracy can be improved by addressing the following components:
$/1000 gallons (US)
<----------- Enter grading in column 'E' and 'J' ----------> Default option selected for unauthorized consumption - a grading of 5 is applied but not displayed ?
?
?
?
?
? Click to access definition
?
?
?
?
?
?
Please enter data in the white cells below. Where available, metered values should be used; if metered values are unavailable please estimate a value. Indicate your confidence in the accuracy of the input data by grading each component (n/a or 1-10) using the drop-down list to the left of the input cell. Hover the mouse over the cell to obtain a description of the grades ?
?
?
?
?
?
(length of service line, beyond the property boundary,
that is the responsibility of the utility)
Use buttons to select
percentage of water supplied
OR
value
Click here: ?
for help using option
buttons below
?
?
?
?
+
+ Click to add a comment
WAS v5.0
+
+
+
+
+
+
American Water Works Association.

Use Customer Retail Unit Cost to value real losses
AWWA Free Water Audit Software v5.0 Reporting Worksheet 1

Page 410 of 824 ends

Page 411 of 824 ends

Page 412 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
E
Appendix E
SB X7-7 2015 Verification Form
and 2020 Compliance Form

Page 413 of 824 ends

SB X7-7 VERIFICATION FORM

Page 414 of 824 ends

SB X7-7 Table 0: Units of Measure Used in UWMP* (select one from the drop down list)
Acre Feet
*The unit of measure must be consistent with Submittal Table 2-3 NOTES:

Page 415 of 824 ends

Parameter Value Units
2008 total water deliveries 9,647 Acre Feet
2008 total volume of delivered recycled water - Acre Feet 2008 recycled water as a percent of total deliveries 0% See Note 1 Number of years in baseline period1, 2
10 Years
Year beginning baseline period range 2000
Year ending baseline period range3 2009
Number of years in baseline period 5 Years
Year beginning baseline period range 2005
Year ending baseline period range4 2009
2 The Water Code requires that the baseline period is between 10 and 15 years. However, DWR recognizes that some water suppliers may not have the minimum 10 years of baseline data.

SB X7-7 Table-1: Baseline Period Ranges
1 If the 2008 recycled water delivery is less than 10 percent of total water deliveries, then the 10-15year baseline period is a continuous 10-year period. If the amount of recycled water delivered in 2008 is 10 percent or greater of total deliveries, the 10-15 year baseline period is a continuous 10- to 15-year period.
3 The ending year for the 10-15 year baseline period must be between December 31, 2004 and December 31, 2010. 4 The ending year for the 5 year baseline period must be between December 31, 2007 and December 31, 2010. 5-year
baseline period
Baseline
10- to 15-year
baseline period
NOTES:

Page 416 of 824 ends

NOTES:

SB X7-7 Table 2: Method for Population Estimates
Method Used to Determine Population
(may check more than one)

1. Department of Finance (DOF) or American Community
Survey (ACS)

3. DWR Population Tool

4. Other
DWR recommends pre-review

2. Persons-per-Connection Method

Page 417 of 824 ends

Population
Year 1 2000 23,113
Year 2 2001 23,432
Year 3 2002 24,301
Year 4 2003 26,312
Year 5 2004 26,683
Year 6 2005 26,829
Year 7 2006 27,286
Year 8 2007 27,706
Year 9 2008 27,618
Year 10 2009 27,677
Year 11
Year 12
Year 13
Year 14
Year 15
Year 1 2005 26,829
Year 2 2006 27,286
Year 3 2007 27,706
Year 4 2008 27,618
Year 5 2009 27,677
SB X7-7 Table 3: Service Area Population
10 to 15 Year Baseline Population
5 Year Baseline Population
NOTES:

Year

Page 418 of 824 ends

Acre Feet
Exported
Water
Change in
Dist. System
Storage
(+/-)
Indirect
Recycled
Water
This column will
remain blank
until SB X7-7
Table 4-B is
completed.

Water
Delivered
for
Agricultural
Use
Process Water
This column will
remain blank
until SB X7-7
Table 4-D is
completed.

Annual Gross Water Use
Year 1 2000 8,149 - - 8,149
Year 2 2001 9,001 - - 9,001
Year 3 2002 9,388 - - 9,388
Year 4 2003 9,413 - - 9,413
Year 5 2004 10,213 - - 10,213
Year 6 2005 9,206 - - 9,206
Year 7 2006 8,556 - - 8,556
Year 8 2007 9,915 - - 9,915
Year 9 2008 9,647 - - 9,647
Year 10 2009 9,103 - - 9,103
Year 11 0 - - - -
Year 12 0 - - - -
Year 13 0 - - - -
Year 14 0 - - - -
Year 15 0 - - - -
9,259
Year 1 2005 9,206 - - 9,206
Year 2 2006 8,556 - - 8,556
Year 3 2007 9,915 - - 9,915
Year 4 2008 9,647 - - 9,647
Year 5 2009 9,103 - - 9,103
9,285
* Units of measure (AF, MG , or CCF) must remain consistent throughout the UWMP, as reported in Table 2-3.

NOTES:

SB X7-7 Table 4: Annual Gross Water Use *
10 to 15 Year Baseline - Gross Water Use
10 - 15 year baseline average gross water use
5 Year Baseline - Gross Water Use
5 year baseline average gross water use
Baseline Year
Fm SB X7-7 Table 3
Volume Into
Distribution System
This column will remain
blank until SB X7-7 Table
4-A is completed.

Deductions

Page 419 of 824 ends

Volume Entering
Distribution
System1
Meter Error
Adjustment 2
Optional
(+/-)
Corrected
Volume Entering
Distribution
System
Year 1 2000 8,149 8,149
Year 2 2001 9,001 9,001
Year 3 2002 9,388 9,388
Year 4 2003 9,413 9,413
Year 5 2004 10,213 10,213
Year 6 2005 9,206 9,206
Year 7 2006 8,556 8,556
Year 8 2007 9,915 9,915
Year 9 2008 9,647 9,647
Year 10 2009 9,103 9,103
Year 11 0 - -
Year 12 0 - -
Year 13 0 - -
Year 14 0 - -
Year 15 0 - -
Year 1 2005 9,206 9,206
Year 2 2006 8,556 8,556
Year 3 2007 9,915 9,915
Year 4 2008 9,647 9,647
Year 5 2009 9,103 9,103
SB X7-7 Table 4-A: Volume Entering the Distribution System(s) Complete one table for each source.
10 to 15 Year Baseline - Water into Distribution System 5 Year Baseline - Water into Distribution System
Name of Source
Baseline Year
Fm SB X7-7 Table 3
1 Units of measure (AF, MG , or CCF) must remain consistent throughout the UWMP, as reported in Table 2-3.
2 Meter Error Adjustment - See guidance in Methodology 1, Step 3 of Methodologies Document NOTES:

This water source is:

The supplier's own water source
A purchased or imported source
Groundwater

Page 420 of 824 ends

Criteria 1- Industrial water use is equal to or greater than 12% of gross water use.

Complete SB X7-7 Table 4-C.1
Criteria 2 - Industrial water use is equal to or greater than 15 GPCD.

Complete SB X7-7 Table 4-C.2
Criteria 3 - Non-industrial use is equal to or less than 120 GPCD.

Complete SB X7-7 Table 4-C.3
Criteria 4 - Disadvantaged Community.

Complete SB x7-7 Table 4-C.4
SB X7-7 Table 4-C: Process Water Deduction Eligibility
(For use only by agencies that are deducting process water) Choose Only One NOTES:

Data from this table will not be entered into WUEdata.

Instead, the entire table will be uploaded to WUEdata as a separate upload in Excel format.

Page 421 of 824 ends

Gross Water
Use Without
Process
Water
Deduction
Industrial
Water Use *
Percent
Industrial
Water
Eligible
for
Exclusion
Y/N
Year 1 2000 8,149 0% NO
Year 2 2001 9,001 0% NO
Year 3 2002 9,388 0% NO
Year 4 2003 9,413 0% NO
Year 5 2004 10,213 0% NO
Year 6 2005 9,206 0% NO
Year 7 2006 8,556 0% NO
Year 8 2007 9,915 0% NO
Year 9 2008 9,647 0% NO
Year 10 2009 9,103 0% NO
Year 11 0 - NO
Year 12 0 - NO
Year 13 0 - NO
Year 14 0 - NO
Year 15 0 - NO
Year 1 2005 9,206 0% NO
Year 2 2006 8,556 0% NO
Year 3 2007 9,915 0% NO
Year 4 2008 9,647 0% NO
Year 5 2009 9,103 0% NO
Data from this table will not be entered into WUEdata.

Instead, the entire table will be uploaded to WUEdata as a separate upload in Excel format.

NOTES:

SB X7-7 Table 4-C.1: Process Water Deduction Eligibility Criteria 1
Industrial water use is equal to or greater than 12% of gross water use Baseline Year
Fm SB X7-7 Table 3
10 to 15 Year Baseline - Process Water Deduction Eligibility 5 Year Baseline - Process Water Deduction Eligibility
* Units of Measure (AF, MG , or CCF) must remain consistent throughout the UWMP, as reported in Table 2-3.

Page 422 of 824 ends

Industrial
Water Use * Population Industrial GPCD
Eligible
for
Exclusion
Y/N
Year 1 2000 23,113 - NO
Year 2 2001 23,432 - NO
Year 3 2002 24,301 - NO
Year 4 2003 26,312 - NO
Year 5 2004 26,683 - NO
Year 6 2005 26,829 - NO
Year 7 2006 27,286 - NO
Year 8 2007 27,706 - NO
Year 9 2008 27,618 - NO
Year 10 2009 27,677 - NO
Year 11 0 - NO
Year 12 0 - NO
Year 13 0 - NO
Year 14 0 - NO
Year 15 0 - NO
Year 1 2005 26,829 - NO
Year 2 2006 27,286 - NO
Year 3 2007 27,706 - NO
Year 4 2008 27,618 - NO
Year 5 2009 27,677 - NO
NOTES:

SB X7-7 Table 4-C.2: Process Water Deduction Eligibility Criteria 2
Industrial water use is equal to or greater than 15 GPCD Baseline Year
Fm SB X7-7 Table 3
10 to 15 Year Baseline - Process Water Deduction Eligibility 5 Year Baseline - Process Water Deduction Eligibility
* Units of Measure (AF, MG , or CCF) must remain consistent throughout the UWMP, as reported in Table 2-3.

Page 423 of 824 ends

Gross Water
Use Without
Process Water
Deduction
Fm SB X7-7
Table 4
Industrial
Water Use *
Non-industrial
Water Use
Population
Fm SB X7-7
Table 3
Non-Industrial
GPCD
Eligible for
Exclusion
Y/N
Year 1 2000 8,149 8,149 23,113 315 NO
Year 2 2001 9,001 9,001 23,432 343 NO
Year 3 2002 9,388 9,388 24,301 345 NO
Year 4 2003 9,413 9,413 26,312 319 NO
Year 5 2004 10,213 10,213 26,683 342 NO
Year 6 2005 9,206 9,206 26,829 306 NO
Year 7 2006 8,556 8,556 27,286 280 NO
Year 8 2007 9,915 9,915 27,706 319 NO
Year 9 2008 9,647 9,647 27,618 312 NO
Year 10 2009 9,103 9,103 27,677 294 NO
Year 11 0 - - - NO
Year 12 0 - - - NO
Year 13 0 - - - NO
Year 14 0 - - - NO
Year 15 0 - - - NO
Year 1 2005 9,206 9,206 26,829 306 NO
Year 2 2006 8,556 8,556 27,286 280 NO
Year 3 2007 9,915 9,915 27,706 319 NO
Year 4 2008 9,647 9,647 27,618 312 NO
Year 5 2009 9,103 9,103 27,677 294 NO
NOTES:

SB X7-7 Table 4-C.3: Process Water Deduction Eligibility Criteria 3
Non-industrial use is equal to or less than 120 GPCD
Baseline Year
Fm SB X7-7 Table 3
10 to 15 Year Baseline - Process Water Deduction Eligibility 5 Year Baseline - Process Water Deduction Eligibility
* Units of Measure (AF, MG , or CCF) must remain consistent throughout the UWMP, as reported in Table 2-3.

Page 424 of 824 ends

Service Area
Median
Household
Income
Percentage of
Statewide Average
Eligible for
Exclusion?
Y/N
2020 $75,235 $55,674 74% YES
NOTES:

California
Median
Household
Income

2. 2010 Median Income
If using the IRWM DAC Mapping Tool, include a screen shot from the tool showing that the service area is considered a DAC.

SELECT ONE
"Disadvantaged Community" status was determined using one of the methods listed below:

Criteria 4
Disadvantaged Community. A “Disadvantaged Community” (DAC) is a community with a median household income less than 80 percent of the statewide average.

SB X7-7 Table 4-C.4: Process Water Deduction Eligibility

1. IRWM DAC Mapping tool
https://gis.water.ca.gov/app/dacs/

Page 425 of 824 ends

Service Area
Population
Fm SB X7-7
Table 3
Annual Gross
Water Use
Fm SB X7-7
Table 4
Daily Per
Capita Water
Use (GPCD)
Year 1 2000 23,113 8,149 315
Year 2 2001 23,432 9,001 343
Year 3 2002 24,301 9,388 345
Year 4 2003 26,312 9,413 319
Year 5 2004 26,683 10,213 342
Year 6 2005 26,829 9,206 306
Year 7 2006 27,286 8,556 280
Year 8 2007 27,706 9,915 319
Year 9 2008 27,618 9,647 312
Year 10 2009 27,677 9,103 294
Year 11 0 - -
Year 12 0 - -
Year 13 0 - -
Year 14 0 - -
Year 15 0 - -
317
Service Area
Population
Fm SB X7-7
Table 3
Gross Water Use
Fm SB X7-7
Table 4
Daily Per
Capita Water
Use
Year 1 2005 26,829 9,206 306
Year 2 2006 27,286 8,556 280
Year 3 2007 27,706 9,915 319
Year 4 2008 27,618 9,647 312
Year 5 2009 27,677 9,103 294
302
NOTES:
5 Year Average Baseline GPCD
Baseline Year
Fm SB X7-7 Table 3
SB X7-7 Table 5: Baseline Gallons Per Capita Per Day (GPCD) Baseline Year
Fm SB X7-7 Table 3
10 to 15 Year Baseline GPCD
10-15 Year Average Baseline GPCD
5 Year Baseline GPCD

Page 426 of 824 ends

317
302
SB X7-7 Table 6: Baseline GPCD Summary
From Table SB X7-7 Table 5
10-15 Year Baseline GPCD
5 Year Baseline GPCD
NOTES:

Page 427 of 824 ends

Supporting Tables
Method 1 SB X7-7 Table 7A
Method 2 SB X7-7 Tables 7B, 7C, and 7D
Method 3 SB X7-7 Table 7-E
Method 4
Method 4 Calculator Located
in the WUE Data Portal at
wuedata.water.ca.gov Resources
button
SB X7-7 Table 7: 2020 Target Method
Select Only One
Target Method
NOTES:

Page 428 of 824 ends

10-15 Year Baseline
GPCD
2020 Target
GPCD
317 254
SB X7-7 Table 7-A: Target Method 1
20% Reduction
NOTES:

Page 429 of 824 ends

Prorated 2020
Target
Population
Weighted
Average
2020 Target
302 287 254 254
SB X7-7 Table 7-F: Confirm Minimum Reduction for 2020 Target NOTES:
1 Maximum 2020 Target is 95% of the 5 Year Baseline GPCD except for suppliers at or below 100 GPCD. 2 Calculated 2020 Target is the target calculated by the Supplier based on the selected Target Method, see SB X7-7 Table 7 and corresponding tables for agency's calculated target. Supplier may only enter one calculated target. 3 Prorated targets and population weighted target are allowed for special situations only. These situations are described in Appendix P, Section P.3 4
Confirmed Target is the lesser of the Calculated 2020 Target (C5, D5, or E5) or the Maximum 2020 Target (Cell B5) Maximum 2020
Target1
5 Year
Baseline GPCD
From SB X7-7
Table 5
Calculated
2020 Target 2
Special Situations3
Confirmed 2020
Target4
As calculated by
supplier in this
SB X7-7
Verification
Form

Page 430 of 824 ends

SB X7-7 COMPLIANCE FORM

Page 431 of 824 ends

SB X7-7 Table 0: Units of Measure Used in 2020 UWMP*
(select one from the drop down list)
Acre Feet
*The unit of measure must be consistent throughout the UWMP, as reported in Submittal Table 2-3.

NOTES:

Page 432 of 824 ends

NOTES:

SB X7-7 Table 2: Method for 2020 Population Estimate
Method Used to Determine 2020 Population
(may check more than one)

1. Department of Finance (DOF) or
American Community Survey (ACS)

3. DWR Population Tool

4. Other
DWR recommends pre-review

2. Persons-per-Connection Method

Page 433 of 824 ends

2020 31,648
SB X7-7 Table 3: 2020 Service Area Population
2020 Compliance Year Population
NOTES:

Page 434 of 824 ends

Exported
Water *
Change in
Dist. System
Storage*
(+/-)
Indirect
Recycled
Water
This column will
remain blank
until SB X7-7
Table 4-B is
completed.

Water
Delivered
for
Agricultural
Use*
Process Water
This column will
remain blank
until SB X7-7
Table 4-D is
completed.
8,559 - - 8,559
NOTES:

SB X7-7 Table 4: 2020 Gross Water Use
2020 Volume
Into
Distribution
System
This column will
remain blank until
SB X7-7 Table 4-A
is completed.
2020 Gross Water
Use
2020 Deductions
* Units of measure (AF, MG , or CCF) must remain consistent throughout the UWMP, as reported in SB X7-7 Table 0 and Submittal Table 2-3.

Compliance
Year 2020

Page 435 of 824 ends

Volume Entering
Distribution System 1
Meter Error
Adjustment 2
Optional
(+/-)
Corrected Volume
Entering
Distribution System
8,559 - 8,559
SB X7-7 Table 4-A: 2020 Volume Entering the Distribution System(s), Meter Error Adjustment
Complete one table for each source.

Name of Source
1 Units of measure (AF, MG , or CCF) must remain consistent throughout the UWMP, as reported in SB X7-7 Table 0 and Submittal Table 2-3. 2 Meter
Error Adjustment - See guidance in Methodology 1, Step 3 of Methodologies Document NOTES
This water source is (check one) :

The supplier's own water source
A purchased or imported source
Merced Subbasin
Compliance Year
2020

Page 436 of 824 ends

Criteria 1- Industrial water use is equal to or greater than 12% of gross water use.

Complete SB X7-7 Table 4-C.1
Criteria 2 - Industrial water use is equal to or greater than 15 GPCD.

Complete SB X7-7 Table 4-C.2
Criteria 3 - Non-industrial use is equal to or less than 120 GPCD.

Complete SB X7-7 Table 4-C.3
Criteria 4 - Disadvantaged Community.

Complete SB x7-7 Table 4-C.4
SB X7-7 Table 4-C: 2020 Process Water Deduction Eligibility (For use only by agencies that are deducting process water) Choose Only One NOTES:

Data from this table will not be entered into WUEdata.

Instead, the entire table will be uploaded to WUEdata as a separate upload in Excel format.

Page 437 of 824 ends

2020 Gross
Water Use
Without
Process
Water
Deduction
2020 Industrial
Water Use
Percent
Industrial
Water
Eligible
for
Exclusion
Y/N
8,559 0% NO
Data from this table will not be entered into WUEdata.

Instead, the entire table will be uploaded to WUEdata as a separate upload in Excel format.

NOTES:

SB X7-7 Table 4-C.1: 2020 Process Water Deduction Eligibility (For use only by agencies that are deducting process water using Criteria 1) Criteria 1
Industrial water use is equal to or greater than 12% of gross water use 2020 Compliance Year

Page 438 of 824 ends

2020 Industrial
Water Use 2020 Population
2020
Industrial
GPCD
Eligible for
Exclusion Y/N
31,648 - NO
NOTES:

SB X7-7 Table 4-C.2: 2020 Process Water Deduction Eligibility (For use only by agencies that are deducting process water using Criteria 2) Criteria 2
Industrial water use is equal to or greater than 15 GPCD 2020 Compliance
Year

Page 439 of 824 ends

2020 Gross
Water Use
Without
Process Water
Deduction
Fm SB X7-7
Table 4
2020
Industrial
Water Use
2020 Nonindustrial
Water Use
2020
Population
Fm SB X7-7
Table 3
Non-Industrial
GPCD
Eligible for
Exclusion
Y/N
8,559 8,559 31,648 241 NO
NOTES:

Criteria 3
Non-industrial use is equal to or less than 120 GPCD
SB X7-7 Table 4-C.3: 2020 Process Water Deduction Eligibility (For use only by agencies that are deducting process water using Criteria 3) 2020 Compliance Year

Page 440 of 824 ends

Service Area
Median Household
Income
Percentage of
Statewide
Average
Eligible for
Exclusion? Y/N
2020 $75,235 $55,674 74% YES
NOTES: Service area medium household income is from the U.S. Census Bureau City of Atwater estimates (in 2019 dollars).

California Median
Household Income*
*California median household income 2015 -2019 as reported in US Census Bureau QuickFacts.

SB X7-7 Table 4-C.4: 2020 Process Water Deduction Eligibility (For use only by agencies that are deducting process water using Criteria 4) Criteria 4
Disadvantaged Community. A “Disadvantaged Community” (DAC) is a community with a median household income less than 80 percent of the statewide average.

SELECT ONE
"Disadvantaged Community" status was determined using one of the methods listed below:

If using the IRWM DAC Mapping Tool, include a screen shot from the tool showing that the service area is considered a DAC.

1. IRWM DAC Mapping tool https://gis.water.ca.gov/app/dacs/

2. 2020 Median Income

Page 441 of 824 ends

2020 Gross Water
Fm SB X7-7 Table 4
2020 Population Fm
SB X7-7 Table 3
2020 GPCD
8,559 31,648 241
SB X7-7 Table 5: 2020 Gallons Per Capita Per Day
(GPCD)
NOTES:

Page 442 of 824 ends

Extraordinary
Events1
Weather
Normalization1
Economic
Adjustment1
241 - - - - 241 254 YES
NOTES:
1 All values are reported in GPCD
2 2020 Confirmed Target GPCD is taken from the Supplier's SB X7-7 Verification Form Table SB X7-7, 7-F.

SB X7-7 Table 9: 2020 Compliance
Optional Adjustments to 2020 GPCD
Did Supplier
Achieve
Targeted
Reduction for
2020?
Actual 2020
GPCD1
2020 Confirmed
Target GPCD 1, 2 TOTAL
Adjustments1
Adjusted 2020
GPCD 1
(Adjusted if
applicable)
Enter "0" if Adjustment Not Used

Page 443 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
F
Appendix F
Energy Use Tables

Page 444 of 824 ends

Urban Water Supplier:

Water Delivery Product (If delivering more than one type of product use Table O-1C) Retail Potable Deliveries
Table O-1B: Recommended Energy Reporting - Total Utility Approach Enter Start Date for Reporting Period 1/1/2020
End Date 12/31/2020
Is upstream embedded in the values
reported?
Sum of All
Water
Management
Processes
Water Volume Units Used AF Total Utility Hydropower Net Utility Volume of Water Entering Process (volume unit) 8,559 8,559 Energy Consumed (kWh) 5,095,834 5,095,834
Energy Intensity (kWh/vol. converted to MG) 1,827 0.0 1,827 Quantity of Self-Generated Renewable Energy
0 kWh
Data Quality (Estimate, Metered Data, Combination of Estimates and Metered Data) Metered Data
Data Quality Narrative:

Narrative:

City of Atwater
Urban Water Supplier Operational Control
Non-Consequential Hydropower
The volume of water is the total amount of groundwater pumped in 2020. The total amount of energy used in 2020 was provided by the City.

Energy is consumed during well pumping.

Page 445 of 824 ends

Urban Water Supplier:

Enter Start Date for Reporting Period 1/1/2020
End Date 12/31/2020
Is upstream embedded in the values reported?
Volume of Water Units Used AF
Volume of Wastewater Entering Process (volume units selected above) 3,663 3,663 Wastewater Energy Consumed (kWh) 4,411,875 4,411,875
Wastewater Energy Intensity (kWh/volume) 0.0 3,696 0.0 3,696 Volume of Recycled Water Entering Process (volume units selected above) 0 Recycled Water Energy Consumed (kWh) 0
Recycled Water Energy Intensity (kWh/volume converted to MG) 0.0 0.0 0.0 0.0 Quantity of Self-Generated Renewable Energy related to recycled water and wastewater operations 0 kWh
Data Quality (Estimate, Metered Data, Combination of Estimates and Metered Data) Metered Data
Data Quality Narrative:

Narrative:

Energy is consumed during pumping and treatment at the wastewater treatment plant.

City of Atwater
Table O-2: Recommended Energy Reporting - Wastewater & Recycled Water Urban Water Supplier Operational Control
Water Management Process
The volume of wastewater and the total amount of energy used in 2020 was provided by the City.

Collection /
Conveyance
Treatment Discharge /
Distribution Total

Page 446 of 824 ends

City of Atwater
Draft 2020 Urban Water Management Plan
September 2021
G
Appendix G
Consumer Confidence Reports

Page 447 of 824 ends

SWS CCR Form Revised January 2018
2017 Consumer Confidence Report
Water System Name: City of Atwater Report Date: 7/1/18
We test the drinking water quality for many constituents as required by state and federal regulations. This report shows the results of our monitoring for the period of January 1 - December 31, 2017 and may include earlier monitoring data.

Este informe contiene información muy importante sobre su agua potable. Tradúzcalo ó hable con alguien que lo entienda bien.

Type of water source(s) in use: Groundwater Wells
Name & general location of source(s): 13,14,15,16,17,18,19,21; Within City Limits Drinking Water Source Assessment information: Community Time and place of regularly scheduled board meetings for public participation: Second and Fourth Monday of every month at 6:00 pm at the Atwater
Council Chambers
For more information, contact: Brian Shaw Phone: ( 209 ) 357-6372

TERMS USED IN THIS REPORT
Maximum Contaminant Level (MCL): The highest
level of a contaminant that is allowed in drinking
water. Primary MCLs are set as close to the PHGs (or
MCLGs) as is economically and technologically
feasible. Secondary MCLs are set to protect the odor,
taste, and appearance of drinking water.

Maximum Contaminant Level Goal (MCLG): The
level of a contaminant in drinking water below which
there is no known or expected risk to health. MCLGs
are set by the U.S. Environmental Protection Agency
(U.S. EPA).

Public Health Goal (PHG): The level of a
contaminant in drinking water below which there is no
known or expected risk to health. PHGs are set by the
California Environmental Protection Agency.

Maximum Residual Disinfectant Level (MRDL):

The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a
disinfectant is necessary for control of microbial
contaminants.

Maximum Residual Disinfectant Level Goal
(MRDLG): The level of a drinking water disinfectant
below which there is no known or expected risk to
health. MRDLGs do not reflect the benefits of the use
of disinfectants to control microbial contaminants.

Primary Drinking Water Standards (PDWS): MCLs
and MRDLs for contaminants that affect health along
with their monitoring and reporting requirements, and
Secondary Drinking Water Standards (SDWS): MCLs for
contaminants that affect taste, odor, or appearance of the drinking water. Contaminants with SDWSs do not affect the health at the MCL levels.

Treatment Technique (TT): A required process intended to reduce the level of a contaminant in drinking water.

Regulatory Action Level (AL): The concentration of a
contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow.

Variances and Exemptions: State Board permission to
exceed an MCL or not comply with a treatment technique
under certain conditions.

Level 1 Assessment: A Level 1 assessment is a study of the water system to identify potential problems and determine (if possible) why total coliform bacteria have been found in our water system.

Level 2 Assessment: A Level 2 assessment is a very detailed study of the water system to identify potential problems and determine (if possible) why an E. coli MCL violation has occurred and/or why total coliform bacteria have been found in our water system on multiple occasions.

ND: not detectable at testing limit
ppm: parts per million or milligrams per liter (mg/L)
ppb: parts per billion or micrograms per liter (µg/L)
ppt: parts per trillion or nanograms per liter (ng/L)
ppq: parts per quadrillion or picogram per liter (pg/L)

Page 448 of 824 ends

Consumer Confidence Report Page 2 of 6
SWS CCR Form Revised January 2018
water treatment requirements. pCi/L: picocuries per liter (a measure of radiation) The sources of drinking water (both tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs, and wells. As water travels over the surface of the land or through the ground, it dissolves naturally-occurring minerals and, in some cases, radioactive material, and can pick up substances resulting from the presence of animals or from human activity.

Contaminants that may be present in source water include:
 Microbial contaminants, such as viruses and bacteria, that may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife.
 Inorganic contaminants, such as salts and metals, that can be naturally-occurring or result from urban stormwater runoff, industrial or domestic wastewater discharges, oil and gas production, mining, or farming.  Pesticides and herbicides, that may come from a variety of sources such as agriculture, urban stormwater runoff, and residential uses.
 Organic chemical contaminants, including synthetic and volatile organic chemicals, that are byproducts of industrial processes and petroleum production, and can also come from gas stations, urban stormwater runoff, agricultural application, and septic systems.
 Radioactive contaminants, that can be naturally-occurring or be the result of oil and gas production and mining activities.

In order to ensure that tap water is safe to drink, the U.S. EPA and the State Water Resources Control Board (State Board) prescribe regulations that limit the amount of certain contaminants in water provided by public water systems.

State Board regulations also establish limits for contaminants in bottled water that provide the same protection for public health.

Tables 1, 2, 3, 4, 5, and 6 list all of the drinking water contaminants that were detected during the most recent sampling for the constituent. The presence of these contaminants in the water does not necessarily indicate that the water poses a health risk. The State Board allows us to monitor for certain contaminants less than once per year because the concentrations of these contaminants do not change frequently. Some of the data, though representative of the water quality, are more than one year old. Any violation of an AL, MCL, MRDL, or TT is asterisked. Additional information regarding the violation is provided later in this report.

TABLE 1 – SAMPLING RESULTS SHOWING THE DETECTION OF COLIFORM BACTERIA Microbiological
Contaminants
(complete if bacteria detected)
Highest No.
of
Detections
No. of months in
violation MCL MCLG Typical Source of Bacteria
Total Coliform Bacteria
(state Total Coliform Rule)
(In a mo.)
0 0 1 positive monthly sample 0 Naturally present in the environment
Fecal Coliform or E. coli
(state Total Coliform Rule)
(In the year)
0 0 A routine sample and a
repeat sample are total
coliform positive, and one
of these is also fecal
coliform or E. coli positive
Human and animal fecal waste
E. coli
(federal Revised Total
Coliform Rule)
(In the 0year) 0 (a) 0 Human and animal fecal waste
(a) Routine and repeat samples are total coliform-positive and either is E. coli-positive or system fails to take repeat samples following E. coli-positive routine sample or system fails to analyze total coliform-positive repeat sample for E. coli.

TABLE 2 – SAMPLING RESULTS SHOWING THE DETECTION OF LEAD AND COPPER Lead and Copper
(complete if lead or copper
detected in the last sample set)
Sample
Date
No. of
samples
collected
90th
percenti
le level
detected
No. sites
exceeding
AL
AL PHG Typical Source of Contaminant
Lead (ppb) 8/30/16 36 1.5 0 15 0.2 Internal corrosion of household water plumbing systems; discharges from
industrial manufacturers; erosion of
natural deposits
Copper (ppm) 8/30/16 36 .16 0 1.3 0.3 Internal corrosion of household plumbing systems; erosion of natural
deposits; leaching from wood
preservatives

Page 449 of 824 ends

Consumer Confidence Report Page 3 of 6
SWS CCR Form Revised January 2018
TABLE 3 – SAMPLING RESULTS FOR SODIUM AND HARDNESS
Chemical or Constituent
(and reporting units)
Sample
Date
Level
Detected
Range of
Detections MCL PHG(MCLG) Typical Source of Contaminant
Sodium (ppm) 12/7/15 34 24/33 none none Salt present in the water and is generally naturally occurring
Hardness (ppm) 3/23/16 90 30/190 none none Sum of polyvalent cations present in the water, generally magnesium
and calcium, and are usually
naturally occurring
TABLE 4 – DETECTION OF CONTAMINANTS WITH A PRIMARY DRINKING WATER STANDARD Chemical or Constituent
(and reporting units)
Sample
Date
Level
Detected
Range of
Detections
MCL
[MRDL]
PHG
(MCLG)
[MRDLG]
Typical Source of Contaminant
Arsenic (ppb) 12/7/15 4.33 ND/9.7 10 .004 Erosion of natural deposits; runoff from orchards; glass and
electronics production wastes
Barium (ppm) 12/7/15 .12 .06/.16 1 2 Discharge of oil drilling wastes and from metal refineries;
erosion of natural deposits
Nitrate (ppm) 5/9/17 4.9 1.8/7.7 10 10 Runoff and leaching from fertilizer use; leaching from
septic tanks and sewage;
erosion of natural deposits
Fluoride (ppm) 12/7/15 .13 .02/.17 2 1 Erosion of natural deposits; water additive which promotes
strong teeth; discharge from
fertilizer and aluminum
factories
Gross Alpha Particle
Activity (pCi/L)
3/11/15 4.4 ND/17.4 15 0 Erosion of natural deposits
Radium 228 (pCi/L) 3/11/15 .18 ND/1.4 5 .019 Erosion of natural deposits Dibromochloropropane
(DBCP) (ppt)
12/17/15 39.4 ND/110 200 1.7 Banned nematocide that may still be present in soils due to
runoff/leaching from former use
on soybeans, cotton, vineyards,
tomatoes, and tree fruit
TTHMs (Total
Trihalomethanes) (ppb)
12/5/17 .48 ND/2.8 80 None Byproduct of drinking water
disinfection
Haloacetic Acids (ppb) 12/5/17 1.6 ND/4.7 60 None Byproduct of drinking water disinfection
Uranium (pCi/L) 12/5/17 2.6 ND/10.7 20 .43 Erosion of natural deposits Chlorine (ppm) 12/31/17 .31 .11/.51 4 4 Drinking water disinfectant added for treatment

Page 450 of 824 ends

Consumer Confidence Report Page 4 of 6
SWS CCR Form Revised January 2018
TABLE 5 – DETECTION OF CONTAMINANTS WITH A SECONDARY DRINKING WATER STANDARD Chemical or Constituent
(and reporting units)
Sample
Date
Level
Detected
Range of
Detections MCL PHG(MCLG) Typical Source of Contaminant
Aluminum (ppb) 12/7/15 80 ND/290 1000 None Erosion of natural deposits; residual from some surface water
treatment processes
Color (Units) 12/7/15 1 1 15 None Naturally-occurring organic materials
Iron (ppb) 12/7/15 72 0/110 300 None Leaching from natural deposits; industrial wastes
Manganese (ppb) 12/7/15 4 0/34 50 None Leaching from natural deposits Turbidity (Units) 12/7/15 .50 .18/1.5 5 None Soil runoff Total Dissolved Solids
(TDS)
12/7/15 256 180/370 1000 None Runoff/leaching from natural deposits
Specific Conductance
(µS/cm)
12/7/15 350 240/458 1600 None Substances that form ions when in water; seawater influence
Chloride (ppm) 12/7/15 12 6.5/19 500 None Runoff/leaching from natural deposits; seawater influence
Sulfate (ppm) 12/7/15 15 7/25 500 None Runoff/leaching from natural deposits; industrial wastes
TABLE 6 – DETECTION OF UNREGULATED CONTAMINANTS
Chemical or Constituent
(and reporting units)
Sample
Date
Level
Detected
Range of
Detections Notification Level Health Effects Language
Trichloropropane (1,2,3-
TCP) (ppt)
12/19/17 43 0/100 5 Some people who drink water
containing 1,2,3-
trichloropropane in excess of
the MCL over many years may
have an increased risk of
getting cancer
Additional General Information on Drinking Water
Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that the water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the U.S. EPA’s Safe Drinking Water Hotline (1-800-426-4791).

Some people may be more vulnerable to contaminants in drinking water than the general population. Immunocompromised persons such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, some elderly, and infants can be particularly at risk from infections. These people should seek advice about drinking water from their health care providers. U.S. EPA/Centers for Disease Control (CDC) guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial contaminants are available from the Safe Drinking Water Hotline (1-800-426-4791).

Lead-Specific Language for Community Water Systems: If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children. Lead in drinking water is primarily from materials and components associated with service lines and home plumbing. [INSERT NAME OF UTILITY] is responsible for providing high quality drinking water, but cannot control the variety of materials used in plumbing components. When

Page 451 of 824 ends

Consumer Confidence Report Page 5 of 6
SWS CCR Form Revised January 2018
your water has been sitting for several hours, you can minimize the potential for lead exposure by flushing your tap for 30 seconds to 2 minutes before using water for drinking or cooking. [Optional: If you do so, you may wish to collect the flushed water and reuse it for another beneficial purpose, such as watering plants.] If you are concerned about lead in your water, you may wish to have your water tested. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline (1-800-426-4701) or at http://www.epa.gov/lead.

Summary Information for Violation of a MCL, MRDL, AL, TT, or Monitoring and Reporting Requirement

VIOLATION OF A MCL, MRDL, AL, TT, OR MONITORING AND REPORTING REQUIREMENT Violation Explanation Duration Actions Taken to Correct the Violation
Health Effects
Language
For Water Systems Providing Groundwater as a Source of Drinking Water TABLE 7 – SAMPLING RESULTS SHOWING

FECAL INDICATOR-POSITIVE GROUNDWATER SOURCE SAMPLES
Microbiological Contaminants
(complete if fecal-indicator detected)
Total No. of
Detections
Sample
Dates
MCL
[MRDL]
PHG
(MCLG)
[MRDLG]
Typical Source of Contaminant
E. coli (In the year) 0 (0) Human and animal fecal waste Enterococci (In the year) TT n/a Human and animal fecal waste Coliphage (In the year) TT n/a Human and animal fecal waste Summary Information for Fecal Indicator-Positive Groundwater Source Samples, Uncorrected Significant Deficiencies, or Groundwater TT

SPECIAL NOTICE OF FECAL INDICATOR-POSITIVE GROUNDWATER SOURCE SAMPLE

SPECIAL NOTICE FOR UNCORRECTED SIGNIFICANT DEFICIENCIES

VIOLATION OF GROUNDWATER TT

Page 452 of 824 ends

Consumer Confidence Report Page 6 of 6
SWS CCR Form Revised January 2018
TT Violation Explanation Duration Actions Taken to Correct the Violation
Health Effects
Language
For Systems Providing Surface Water as a Source of Drinking Water TABLE 8 - SAMPLING RESULTS SHOWING TREATMENT OF SURFACE WATER SOURCES Treatment Technique (a)
(Type of approved filtration technology used)
Turbidity Performance Standards (b)
(that must be met through the water treatment process)
Turbidity of the filtered water must:
1 – Be less than or equal to _____ NTU in 95% of measurements in a month. 2 – Not exceed _____ NTU for more than eight consecutive hours. 3 – Not exceed ____ NTU at any time.

Lowest monthly percentage of samples that met Turbidity Performance Standard No. 1.

Highest single turbidity measurement during the year
Number of violations of any surface water treatment
requirements
(a) A required process intended to reduce the level of a contaminant in drinking water. (b) Turbidity (measured in NTU) is a measurement of the cloudiness of water and is a good indicator of water quality and filtration performance.

Turbidity results which meet performance standards are considered to be in compliance with filtration requirements.

Summary Information for Violation of a Surface Water TT

VIOLATION OF A SURFACE WATER TT
TT Violation Explanation Duration Actions Taken to Correct the Violation
Health Effects
Language
Summary Information for Operating Under a Variance or Exemption Summary Information for Federal Revised Total Coliform Rule Level 1 and Level 2 Assessment Requirements

Page 453 of 824 ends

SWS CCR Form Revised February 2019
2018 Consumer Confidence Report
Water System Name: City of Atwater Report Date: 7/1/19
We test the drinking water quality for many constituents as required by state and federal regulations. This report shows the results of our monitoring for the period of January 1 to December 31, 2018 and may include earlier monitoring data.

Este informe contiene información muy importante sobre su agua para beber. Favor de comunicarse City of Atwater a (209) 357-6370 para asistirlo en español.

Type of water source(s) in use: Groundwater Wells
Name & general location of source(s): 13,14,15,16,17,18,19,21; Within City limits Drinking Water Source Assessment information: Community Time and place of regularly scheduled board meetings for public participation: Second and Fourth Monday of every month at 6:00 P.M. at the Atwater
Council Chambers
For more information, contact: Brian Shaw Phone: (209) 357-6372

TERMS USED IN THIS REPORT
Maximum Contaminant Level (MCL): The highest level
of a contaminant that is allowed in drinking water. Primary MCLs are set as close to the PHGs (or MCLGs) as is
economically and technologically feasible. Secondary
MCLs are set to protect the odor, taste, and appearance of drinking water.

Maximum Contaminant Level Goal (MCLG): The level
of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs are set by the
U.S. Environmental Protection Agency (U.S. EPA).

Public Health Goal (PHG): The level of a contaminant in drinking water below which there is no known or expected risk to health. PHGs are set by the California Environmental Protection Agency.

Maximum Residual Disinfectant Level (MRDL): The
highest level of a disinfectant allowed in drinking water.

There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.

Maximum Residual Disinfectant Level Goal (MRDLG):

The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not
reflect the benefits of the use of disinfectants to control microbial contaminants.

Primary Drinking Water Standards (PDWS): MCLs and
MRDLs for contaminants that affect health along with their monitoring and reporting requirements, and water treatment requirements.

Secondary Drinking Water Standards (SDWS): MCLs for
contaminants that affect taste, odor, or appearance of the drinking water. Contaminants with SDWSs do not affect the health at the MCL levels.

Treatment Technique (TT): A required process intended to reduce the level of a contaminant in drinking water.

Regulatory Action Level (AL): The concentration of a
contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow.

Variances and Exemptions: Permissions from the State Water Resources Control Board (State Board) to exceed an MCL or not comply with a treatment technique under certain conditions.

Level 1 Assessment: A Level 1 assessment is a study of the water system to identify potential problems and determine (if possible) why total coliform bacteria have been found in our water system.

Page 454 of 824 ends

Atwater City CouncilMarch 14, 2022

Atwater City Council
March 14, 2022