2025 Urban Water Management Plan

City of Pleasanton | Water Shortage Contingency Plan Public Draft | May 2026 6 EKI Environment & Water, Inc. The City uses planned unconstrained water demands as input to the AWSDA for the current year and the following one dry year. Unconstrained water demands are customer demands where no water conservation measures are in effect. In planning for water demands, the City considers the following factors, as applicable and appropriate: 1. Weather conditions 2. Water year type 3. Population changes (e.g., due to development projects) 4. Anticipated new demands (e.g., changes to land use) 5. Pending policy changes that may impact demands 6. Infrastructure operations Similarly, when describing water demands for the AWSDA, the City generally uses Section 4 (Water Use Characterization) of the 2025 UWMP, including the demand projections. If the demand projections differ between the AWSDA and the UWMP, the City provides an explanation for the difference. In preparing the AWSDA, Pleasanton uses the following assessment methodology and criteria to evaluate the City's water supply reliability for the current year and following one dry year. • The City uses a spreadsheet to plan for current year and future year supply and demands. Planned supply and demand inputs are entered into the spreadsheet in annual increments. As needed, the increments may be revised to monthly or seasonal periods to more closely evaluate specific conditions and needs. • Supply and demand are compared to determine the City’s water supply reliability in the current year and the following one dry year. The City’s water supply is deemed reliable if it can meet planned water demands in both the current year and the following dry year. If water supply cannot meet planned water demands in the current year or the following dry year, the extent of the water shortage condition is determined, and the City prepares response actions in accordance with this WSCP. • Findings from the AWSDA are presented to City Council for consideration, along with recommendations for action. 3 SIX STANDARD WATER SHORTAGE LEVELS To provide a consistent regional and statewide approach for conveying the relative severity of water supply shortage conditions, the State has established six standard water shortage levels that correspond to progressive reductions of up to 10, 20, 30, 40, 50%, and greater than 50% from the normal reliability condition. Each shortage condition should correspond to additional actions water suppliers would implement to meet the severity of the impending shortages. A water supplier may use its own shortage levels if a crosswalk is included relating its existing shortage levels to the six standard levels; however, the City’s stages align with the State’s, as described in PMC §9.30.060 and as indicated in Table 3.