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Section 6 2025 Urban Water Management Plan <br />Water Supply Characterization City of Pleasanton <br /> Public Draft | May 2026 <br /> 6-31 EKI Environment & Water, Inc. <br />6.9 Summary of Existing and Planned Sources of Water <br /> <br />Pleasanton’s water supplies consist of potable water purchased from Zone 7, recycled water produced by <br />DSRSD and Livermore, and groundwater pumped by the City. Table 6-9 summarizes the actual water <br />supply volumes produced in 2025. Groundwater accounted for nearly 0% of Pleasanton’s water supplies <br />in 2025, because Pleasanton has had to decommission its existing production wells, as described in <br />Section 6.2. As noted in Table 6-10, Pleasanton does not reduce salinity in either groundwater or surface <br />water prior to distribution. <br />With the implementation of the Joint Groundwater Wells Project (see Section 6.2.4), Pleasanton expects <br />to begin pumping its full GPQ (3,500 AFY) again, starting in 2030. Purchased water from Zone 7 is expected <br />to increase in the future to meet increased demands, while groundwater and recycled water supplies will <br />stay constant. Pleasanton’s total water supply projections are shown in Table 6-11 in five-year increments <br />through 2050. <br />Table 6-9 Water Supplies – 2025 Actual (DWR Table 6-8) <br />Water Supply Additional Description <br />2025 <br />Water Type <br />Actual <br />Volume <br />Total <br />Entitlement <br />(AF) (AF) <br />Purchased or <br />Imported Water Zone 7 Wholesale Water Potable 12,660 -- <br />Groundwater (not <br />desalinated) Livermore Valley Basin Potable 3 3,500 <br />Recycled Water DSRSD RWTF and LWRP Non-Potable 1,073 -- <br />Subtotal Potable 12,663 -- <br />Subtotal non-potable 1,073 -- <br />Total 13,736 -- <br /> <br /> CWC §10631(b) <br />Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier <br />over the same five-year increments described in subdivision (a). <br /> CWC §10631(b)(2) <br />When multiple sources of water supply are identified, a description of the management of each supply in <br />correlation with the other identified supplies. <br /> CWC §10631(b)(4)(D) <br />A detailed description and analysis of the amount and location of groundwater that is projected to be pumped <br />by the urban water supplier. The description and analysis shall be based on information that is reasonably <br />available, including, but not limited to, historic use records.