2025 Urban Water Management Plan

Section 1 2025 Urban Water Management Plan Plan Introduction City of Pleasanton Public Draft | May 2026 1-3 EKI Environment & Water, Inc. • Pleasanton 2024 Water Distribution System Capacity Master Plan. The City’s Water Distribution System Capacity Master Plan (WDSCMP) identifies recommended capital improvements to the existing potable water distribution system to maintain the City’s current level of service and support future growth through 2045. The WDSCMP relies on a hydraulic model of the distribution system to evaluate system performance under projected water demand growth and various supply scenarios. Prepared in coordination with the City’s Public Works Department, this Plan is integrated with the City’s broader planning efforts. As further described in Section 2.3.1, Pleasanton also coordinated with its wholesale water supplier, Zone 7, to support consistency between their respective 2025 UWMPs. 1.4 Special Considerations This Plan includes information beyond the requirements of the UWMP Act to support other regulatory processes that rely on UWMP data, including the Delta Plan and permitting for ocean desalination projects. 1.4.1 Demonstration of Consistency with the Delta Plan for Covered Actions The Sacramento-San Joaquin Delta (Delta) Reform Act of 2009 established the Delta Stewardship Council to create a comprehensive, long-term, legally enforceable plan to guide management of the Delta’s water and environmental resources (i.e., the Delta Plan). The Delta Reform Act set the foundation for state policy to reduce reliance on the Delta in meeting future water supply needs by diversifying water supply portfolios through actions such as improved water use efficiency, water reuse, advanced water technologies, and other regional water supply projects. Further, the Delta Reform Act established a process for demonstrating consistency of a proposed project (a “covered action”) with the Delta Plan. Covered actions may include: (1) a multi-year water transfer, (2) a conveyance facility, or (3) a new diversion that involves transferring water through, exporting water from, or using water in the Delta. Though not required under the UWMP Act, for urban water suppliers that anticipate participating in or receiving water from proposed project that is considered a covered action, DWR’s UWMP Guidebook recommends UWMPs include information to support the certification process to demonstrate consistency with Delta Plan Policy WR P1: Reduce Reliance on the Delta Through Improved Regional Water Self- Reliance (California Code of Regulations [CCR], Title 23, §5003). The City’s wholesale water supplier, Zone 7, is a contractor of the State Water Project (SWP) and, thus, relies on the Delta. Through Zone 7, the City anticipates participating in a covered action and, therefore, is required to demonstrate reduced Delta reliance. While Zone 7 imports about 80% of its water in a normal year from the SWP, it is pursuing various supply augmentation and demand management efforts to reduce reliance on the Delta. Supply-side efforts are further discussed in Section 6 of this UWMP, which addresses existing and proposed projects that improve regional self-reliance. Also, Section 9 describes demand management measures (DMMs) that the City has implemented. Appendix C demonstrates the City’s consistency with Delta Plan Policy WR P1. 1.4.2 Permitting for Ocean Desalination Projects California’s Water Supply Strategy: Adapting to a Hotter, Drier Future updates state priorities to address water supply shortages due to long-term drought and the accelerating impacts of climate change, including identifying opportunities to access new water sources such as ocean desalination. To support permitting for ocean desalination projects, the Seawater Desalination Siting and Streamlining Report to