City of Simi Valley
Staff Report
J
une 22, 2026
To: B
oard of Directors, Ventura County Waterworks District No. 8 Fr
om: Public Works Department,
Ron Fuchiwaki, Public Works Director
Subj
ect: A public hearing to consider adoption of a resolution adopting the 2025 Urban Water Management Plan and 2025 Water Shortage Contingency Plan Sta
ff Recommendation
I
t is recommended that the Board of Directors:
1. A
pprove the 2025 Urban Water Management Plan (UWMP) (Attachment B) in accordance with the requirements of the California Urban Water Management Planning Act;
2. A
pprove the 2025 Water Shortage Contingency Plan (WSCP) that establishes water shortage response actions, demand reduction measures, and shortage levels consistent with state requirements; and
3. A
dopt Resolution No. WWD-307 (Attachment C) adopting both the 2025 Urban Water Management Plan and the 2025 Water Shortage Contingency Plan, and authorizing staff to submit the adopted plans to the appropriate state agencies and implement the plans as required.
Ba
ckground
The Urban Water Management Planning Act (California Water Code §10610 et seq.) requires urban water suppliers serving more than 3,000 connections or delivering more than 3,000 acre-feet of water annually to prepare and adopt an UWMP and WSCP every five years. The District most recently adopted these plans in 2021. The UWMP provides a comprehensive assessment of the District’s water supply reliability, demand projections, and long- term planning strategies. The WSCP , incorporated into the UWMP, outlines staged response actions to address potential water shortages of up to 50 percent or more.
Adoption of the UWMP and WSCP is also required to maintain eligibility for state grants and loans.
T
he 2025 UWMP builds upon prior planning efforts and incorporates updated data on population growth and land use , water demand projections through 20 50, water supply sources and reliability under normal, single- dry, and multiple- dry year scenarios , and climate change impacts and drought risk.
Agenda Item No.
5C
The 2025 WSCP serves as a guide for the intended actions by the District during water shortage conditions to improve preparedness for droughts and other unanticipated impacts on water supplies. The 2025 WSCP has been updated in accordance with California Water Code Section 10632 and Section 10635 and recent statutory changes, including standardized water shortage levels, defined response actions for each level and annual water supply and demand assessment procedures . The WSCP is prepared as a stand-alone plan that can be amended independently of the UWMP when needed.
Public hearing notice requirements have been fully met in accordance with the California Water Code
§10642. The Draft 2025 UWMP and 2025 WSCP documents were posted on the City's website at https://www.simivalley.org/uwmp on May 22, 2026. Additionally, notice of the Public Hearing (Attachment A) was published in the Ventura County Star on June 8, 2026, and June 15, 2026. The District has not received any comments to date.
Additionally, the District distributed Notices of Preparation on September 23, 2025, followed by Notices of Public Hearing on May 22 , 2026, to the following neighboring agencies:
• Calleguas Municipal Water District (CMWD)
• City of Simi Valley, Department of Environmental Services • County of Ventura, Water and Sanitation Department
• County of Ventura, Resource Management Agency
• Las Virgenes Municipal Water District
• Golden State Water Company
Discussion
The UWMP (Executive Summary, Attachment B ) evaluates the District’s ability to meet current and future water demands, supply sources, and reliability under normal, single - dry year, and multiple- dry year scenarios. The UWMP includes updated population and water demand projections , a ssessment of existing and planned water supplies , w ater supply reliability analysis, water use efficiency and conservation measures , drought risk assessments, and climate change considerations and demand variability.
The 2025 UWMP updates the District’s long-term water resource planning efforts and provides updated service area characterization, land use, supply sources, and demand projections to ensure reliability over the 25-year planning horizon. Demands are projected based upon current use, historical use trends, and forecasted development and population.
The WSCP (available on the City’s website at the link provided above) provides guidance on preparing for and responding to water supply reductions due to drought, unforeseen emergencies, or supply disruptions. It establishes a framework for responding to water shortages through staged actions ranging from voluntary conservation to mandatory restrictions. Each stage includes trigger conditions, demand reduction targets, and enforcement mechanisms.
2 The 2025 WSCP establishes water shortage usage levels ranging from voluntary conservation measures to mandatory restrictions. Each stage identifies specific response actions, such as operational changes , demand reduction measures, w ater use restrictions, e nforcement mechanisms , and p ublic outreach and communication strategies. The 2025 WSCP aligns with statewide water efficiency standards, emphasizes long-term sustainability and resilience, and is consistent with the Water Shortage Contingency Plan described in the City of Simi Valley’s Municipal Code.
Key findings include:
• Supply Reliability: The District has sufficient water supplies to meet projected demand under normal and single- dry year conditions. There is continued strong reliance on imported water from CMWD, supplemented by local groundwater from the Gillibrand Basin and recycled water.
Water supplies are projected to increase from 19,276 acre- feet (AF) in 2030 to 23,779 AF in 2050 during normal water years. Additional conservation measures may be required during extended drought conditions.
• Demand Management: The 2025 UWMP indicates that the District has reliable water supplies to meet its projected water demands, with total demands projected to increase from 18,176 AF in 2030 to 22,679 AF in 2050 during normal water years.
Continued implementation of water conservation programs is essential to maintaining long- term sustainability. The District has a variety of programs to manage and reduce water demand, including water waste prohibitions, public education and outreach, monitoring and repairing system leaks, and improving irrigation efficiency within the water service area. Additional demand reduction actions may be implemented, as needed, in accordance with the WSCP.
• Climate Resilience: Climate change is increasing the uncertainty for California’s future demand conditions and water supply conditions, thereby posing additional water management challenges. The UWMP incorporates climate variability and outlines adaptive strategies to enhance system resilience.
• Dry Years Scenario: For the five consecutive dry years scenario, CMWD projects sufficient supplies to meet demand during the first four years. However, in the fifth consecutive drought year, imported water supplies are projected to be insufficient to meet unconstrained demand. Therefore, CMWD assumes that a 15% reduction will be required to align demand with supply availability from the Metropolitan Water District of Southern California. In the event of a fifth consecutive dry year, the District will implement the WSCP , mandating a reduction of water consistent with CMWD’s allocation. This is reflected in the demand and supply projections and ensures regulatory compliance.
3 Financial Impact
There is no immediate fiscal impact associated with the adoption of the 2025 UWMP and 2025 WSCP. Implementation of certain water management strategies may have future budgetary implications, which will be evaluated as part of the annual budget process.
City Council Priority
This item supports the Reliable Infrastructure Pillar of Excellence.
Suggested Motion
I move to:
1. Approve the 2025 UWMP in accordance with the requirements of the California Urban Water Management Planning Act;
2. Approve the 2025 WSCP that establishes water shortage response actions, demand reduction measures, and shortage levels consistent with state requirements; and
3. Adopt Resolution No. WWD -307 adopting both the 2025 Urban Water Management Plan and the 2025 Water Shortage Contingency Plan, and authorizing staff to submit the adopted plans to the appropriate state agencies and implement the plans as required.
Summary
The California Water Code requires urban water suppliers to prepare a UWMP and WSCP and update them every five years. The 2025 UWMP and 2025 WSCP are intended to comply with all regulatory requirements and evaluate the District’s long- term water supply reliability and ability to meet projected demands through 2050. Additional conservation measures may be required during extended drought conditions. The 2025 UWMP and 2025 WSCP updates support the District’s long-term water resource planning efforts over a 25-year planning horizon. The plans also align with statewide water efficiency standards and emphasize long- term sustainability and resilience. It is recommended that the Board of Directors approve the 2025 UWMP in accordance with the requirements of the California Urban Water Management Planning Act , approve the 2025 WSCP that establishes water shortage response actions, demand reduction measures, and shortage levels consistent with state requirements, and adopt Resolution No. WWD-WWW adopting both the 2025 Urban Water Management Plan and the 2025 Water Shortage Contingency Plan, and authorize staff to submit the adopted plans to the appropriate state agencies and implement the plans as required.
Prepared by: Michel Kadah, Principal Engineer
Attachments:
Attachment A – Public Hearing Procedure
Attachment B – UWMP Executive Summary
Attachment C – Resolution No. WWD-307
4 Attachment A
PUBLIC HEARING PROCEDURE
HEARING DATE: June 22, 2026
1. CITY CLERK: This is the time and place set for a public hearing to consider adoption of a resolution adopting the 2025 Urban Water
Management Plan and 2025 Water Shortage Contingency
Plan (Read by City Clerk including reading of Resolution AND/OR Ordinance if applicable)
2. MAYOR: Before we begin, are there any ex parte communications to report?
3. ANY COUNCIL
MEMBER: (Report)
4. MAYOR: Staff may begin with the oral report on this matter.
5. STAFF: (Report)
6. MAYOR: Any questions of staff from City Council Members? (Questions of staff and staff response)
7. MAYOR: At this time I would like to open the hearing for anyone in the City Council Chambers wishing to be heard on this matter?
8. AUDIENCE: Public Testimony and Comments
9. MAYOR: Does Staff desire to respond to any comments or issues raised?
10. STAFF: (Response to comments and additional City Council questions)
11. MAYOR: The hearing is now closed.
12. MAYOR: I will now entertain a motion.
13. ANY COUNCIL
MEMBER : NOTE: PICK THE APPLICABLE ACTION(S) & CHANGE ITEM NUMBER(S) OF ACTION(S) AS NEEDED:
City Council Actions (by motion of any Council Member):
1) Adopt, modify, or not adopt Resolution No. WWD-307
adopting the 2025 Urban Water Management Plan and
2025 Water Shortage Contingency Plan (requires a
second and a vote; requires reading of resolution).
*Any action to refer the matter back to staff or to continue the matter requires a second and a vote.
5 14. ANY COUNCIL
MEMBER : Second
15. MAYOR: (Call for vote)
16. MAYOR: Proceed to the next item.
6 I Kennedy Jenks
Executive Summary/Lay Description
This document presents the 2025 Urban Water Management Plan (UWMP) for the Ventura County Waterworks District No. 8 (WWD8). The Urban Water Management Planning Act of 1983 (Act) requires that all urban water suppliers, being a supplier providing water for municipal purposes to more than 3,000 customers or serving more than 3,000 acre-feet annually, to adopt a UWMP every five years, demonstrating water supply reliability in normal, single dry, and multiple dry water years. Detailed information on what must be included in UWMPs as well as whom must complete it can be found in California Water Code sections 10610 through 10657.
The City of Simi Valley is located in the southeastern corner of Ventura County, adjacent to Los Angeles County. It is situated between the civic centers of the City of Ventura and the City of Los Angeles. Approximately 68 percent of the developed portion of Simi Valley is served by WWD8.
WWD8 also serves unincorporated areas located southeast and north of the City boundary. The remainder of Simi Valley not served by WWD8 is served by the Golden State Water Company (GSWC).
A UWMP is a planning tool that generally guides the actions of water management agencies. It provides managers and the public with a broad perspective on several water supply issues. It is not a substitute for project-specific planning documents, nor was it intended to be when mandated by the State Legislature. It is appropriate to look at the UWMP as a general planning framework, not a specific action plan. It is an effort to generally answer key planning questions regarding water supply reliability, demand management, and drought response.
Using these "framework" questions and resulting answers, WWD8 will pursue feasible and cost effective options and opportunities to meet demands.
The Act requires preparation of a plan that:
• Evaluates water supply planning over a 20-year period in five-year increments. (WWD8 is going beyond the requirements of the Act by developing a plan which spans twenty-five years, through 2050.)
• Identifies and quantifies adequate water supplies, including recycled water, for existing and future demands, in normal, single-dry, and multiple-dry years. • Implements conservation and efficient use of urban water supplies.
Water Use
This UWMP describes historic and current water usage and the methodology used to project future demands within the WWD8 service area. Water use is divided into sectors including residential, commercial, industrial, landscape, and other uses. Projections take into account existing land use data and potential new development through the end of the planning period.
Table ES-1 summarizes projected demands for normal years. Additional details on water use projections are found in Section 3.
Ventura County Waterworks District No. 8 - City of Simi Valley 2025 Urban Water Management Plan - PUBLIC REVIEW DRAFT
https://kjcnelsharepoint.com/sites/simivalley2025uwmp377-intemal/shared documentsrintemal/lpublic review draft/2025 wwd8 uwmp_public draft.docx Page E-1
Attachment B
7 I Kennedy Jenks
Table ES-1 Projected Water Demands 2030 to 2050 a
2030 2035 2040 2045 2050
Total Water Use (AFY) 18,176 19,302 20,428 21,553 22,679 • Normal year demand projections. See Section 3.
WWD8 has a variety of programs to manage water demand including water waste prohibitions, public education and outreach, monitoring and repairing system leaks, and improving irrigation efficiency within the water service area. Numerous demand management measures are continuously implemented to improve water use efficiency. Additional demand reduction actions may be implemented, as needed, in accordance with WWD8's Water Shortage Contingency Plan, included in Appendix G.
Supply Reliability
The primary water supply for WWD8 is imported water purchased from Calleguas Municipal Water District (Calleguas). The imported water makes up the majority, approximately 99 percent, of water available in WWD8's service area. A secondary, local, water supply is provided by WWD8's local sources, including groundwater and recycled water. Groundwater is pumped from the Gillibrand subbasin of the Simi Valley Basin. The Tapo Canyon Water Treatment Plant (TCWTP) was constructed to provide additional water supply using local water sources from within the City of Simi Valley groundwater basin and to reduce the amount of imported water from Calleguas.
The TCWTP is supplied by Well No. 32 and treats up to 1 million gallons per day (MGD), which accounts for approximately 1 percent of the total water delivered within WWD8' service area.
Based on Calleguas' supply reliability analyses, Calleguas projects having sufficient supplies to meet WWD8 demands through the planning period, in normal and single-dry years, but may have reduced supplies during a five-year drought scenario that would require WWD8 to implement demand management measures.
Table ES-2 summarizes supplies projected to be available to WWD8 through 2050, during normal years. Additional details on WWD8's water supply sources and supply reliability are found in Sections 4 through 6.
Table ES-2 Projected Water Supplies 2030 to 2050 (AF) a Water Supply Source 2030 2035 2040 2045
Imported Water 18,076 19,202 20,328 21,453
Groundwater 1,100 1,100 1,100 1,100
Recycled Water 100 100 100 100
Total Supplies 19,276 20,402 21,528 22,653
• Normal year supply projections. See Section 4.
Ventura County Waterworks District No. 8 - City of Simi Valley 2025 Urban Water Management Plan - PUBLIC REVIEW DRAFT
https://kjcnelsharepoint.com/sites/simivalley2025uwmp377-intemal/shared documentsrintemal/lpublic review draft/2025 wwd8 uwmp_public draft.docx 2050
22,579
1,100
100
23,779
Page E-2
8 I Kennedy Jenks
Fundamental Findings of the UWMP
Overall, analyses presented in this UWMP indicate that WWD8 has reliable water supplies to meet its projected water demands over the planning period, through 2050, assuming demand reductions during a five-year drought scenario.
WWD8 also compared total water supplies and total projected water use for the next five years, from 2026 to 2030, assuming a 5 consecutive-year drought. Similar to the long-term projections, water supplies available to WWD8 are projected to be reliable to meet expected demands under those conditions as well. Details on the water service reliability and drought risk assessments are found in Section 6.
Ventura County Waterworks District No. 8 - City of Simi Valley 2025 Urban Water Management Plan - PUBLIC REVIEW DRAFT
https://kjcnelsharepoint.com/sites/simivalley2025uwmp377-intemal/shared documentsrintemal/lpublic review draft/2025 wwd8 uwmp_public draft.docx Page E-3
9 Attachment C
RESOLUTION NO. WWD-307
A RESOLUTION OF THE BOARD OF DIRECTORS OF
VENTURA COUNTY WATERWORKS DISTRICT NO. 8
ADOPTING THE 20 25 URBAN WATER MANAGEMENT
PLAN AND 2025 WATER SHORTAGE CONTINGENCY
PLAN
WHEREAS, the California Legislature enacted Assem bly Bill 797 (Water Code Section 10610 et. Seq., known as the Urban Water Management Planning Act) during the 1983-1984 Regular Session, and as amended subsequently, which mandates that every supplier providing water for municipal purposes to more than 3,000 customers or supplying more than 3,0 00 acre feet of water annually prepare and adopt an Urban Water Management Plan every five years, the primary objective of which is to plan for the conservation and efficient use of water; and
WHEREAS, the California Water Code Section 10632, requires the inclusion of a Water Shortage Contingency Plan as part of the Urban Water Management Plan; and
WHEREAS, Ventura County Waterworks District No. 8 (District) is an urban supplier of water providing water to over 90,000 customers and subject to these requirements; and
WHEREAS, the Urban Water Management Plan and Water Shortage Contingency Plan shall be periodically reviewed at least once every five years , and the District shall make any amendments to these plans which are indicated by the review; and
WHEREAS, the District has prepared the 2025 Urban Water Management Plan and 2025 Water Shortage Contingency Plan in accordance with State law and California Department of Water Resources guidelines; and
WHEREAS, the 2025 Urban Water Management Plan and 2025 Water Shortage Contingency Plan evaluate water supplies, demands, reliability, conservation measures, and response actions under varying levels of water shortage conditions; and
WHEREAS, the 2025 Urban Water Management Plan and 2025 Water Shortage Contingency Plan must be adopted by July 1, 2026 , after public review and hearing, and filed with the California Department of Water Resources within thirty days of adoption; and
WHEREAS, the 2025 Urban Water Management Plan and 2025 Water Shortage Contingency Plan were made available for public review and comment in accordance with all applicable statutory requirements, and the District properly noticed the public hearing conducted by the Board of Directors on June 22, 2026.
10 Res. No. WWD-307
NOW, THEREFORE, THE BOARD OF DIRECTORS OF VENTURA
COUNTY WATERWORKS DISTRICT NO. 8 DOES HEREBY RESOLVE AS FOLLOWS:
S
ECTION 1. The 2025 Urban Water Management Plan and 2025 Water Shortage Contingency Plan, which are incorporated by reference, are hereby adopted and ordered filed with the District Secretary.
S
ECTION 2. The District Manager or designee is hereby authorized and directed to submit the adopted 2025 Urban Water Management Plan and 2025 Water Shortage Contingency Plan to the California Department of Water Resources by July 1, 2026.
S
ECTION 3. The District Manager is hereby authorized to implement the Water Conservation Programs outlined in the adopted 202 5 Urban Water Management Plan and 2025 Water Shortage Contingency Plan, and make recommendations to the District’s Board of Directors regarding necessary procedures, rules, and regulations necessary to carry out effective and equitable water conservation programs.
S
ECTION 4 . The District Secretary shall certify to the adoption of this resolution and shall cause a certified resolution to be filed in the Office of the District Secretary.
PASSED
and ADOPTED this 22nd day of June 2026.
A
ttest:
Lucy Blanco, City Clerk/ Dee Dee Cavanaugh, Chair of the Ventura District Secretary County Waterworks District No. 8
A
pproved as to Form: Approved as to Content:
Algeria R. Ford, District Counsel Samantha C. Argabrite, District Manager Ronald K. Fuchiwaki
Public Works Director
11