2025 Urban Water Management Plan

2025 Urban Water Management Plan Executive Summary City of Pleasanton Public Draft | May 2026 ES-1 EKI Environment & Water, Inc. EXECUTIVE SUMMARY An Urban Water Management Plan (UWMP) helps water suppliers assess the availability and reliability of their water supplies and current and projected water use to help ensure reliable water service under different conditions. This water supply planning is especially critical for California currently, as climate change alters rainfall and snowfall (impacting water supply availability) and development occurs statewide (increasing the need for reliable water supplies). The Urban Water Management Planning Act requires urban water suppliers to develop UWMPs every five years. UWMPs evaluate conditions for the next 20 years, such that these regular updates ensure continued, long-term planning. The City of Pleasanton (City) is a water retailer (also referred to as a retail urban water supplier, meaning it sells water directly to individual water users (e.g., residents and businesses). The City purchases most of its water supplies from Zone 7 Water Agency (Zone 7). Besides the City, Zone 7’s retailers consist of the California Water Service (Cal Water), the City of Livermore (Livermore), and the Dublin San Ramon Services District (DSRSD). Because the City provides water to more than 3,000 users, it is required to prepare a UWMP. This Executive Summary serves as a Lay Description of the City's UWMP, as required by California Water Code §10630.5. California Water Code Requirements The California Water Code (CWC) documents specific requirements for California water suppliers. The Urban Water Management Planning Act is included in the California Water Code and specifies the required elements of a UWMP, including discussing an agency’s water system and facilities, calculating how much water its customers use (i.e., water demand) and how much it can supply, and detailing how it would respond during a drought or other water supply shortage. Also, a UWMP must describe what specific coordination steps were taken to prepare, review, and adopt the plan. Relevant portions of the code are provided at the beginning of each section. The Urban Water Management Planning Act has been revised over the years. The Water Conservation Act of 2009 (also known as SB X7-7) required retail water agencies to establish water use targets for 2015 and 2020 that would result in statewide water savings of 20 percent by 2020. In 2020, retail water agencies were required to report on their compliance with SB X7-7. The 2012 to 2016 drought led to further revisions to the Act to improve water supply planning for long-term reliability and resilience to drought and climate change. These revisions were formalized in the 2018 Water Conservation Legislation and include: • Five Consecutive Dry-Year Water Reliability Assessment: Analyze water supply reliability for five consecutive dry years over the planning period of this UWMP (see Section 7). • Drought Risk Assessment: Assess water supply reliability from 2026 to 2030 assuming that the next five years are dry years (see Section 7).  CWC §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.