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Section 6 2025 Urban Water Management Plan <br />Water Supply Characterization City of Pleasanton <br /> Public Draft | May 2026 <br /> 6-30 EKI Environment & Water, Inc. <br /> Figure 6-6 Chain of Lakes: Existing and Planned Facilities <br />6.8.2.2 New Wells <br />Additional municipal water supply wells could maximize access to existing local storage in the Main Basin <br />during droughts and facility outages. Zone 7’s Mocho I well has been out of service since 2019. Zone 7 has <br />since been seeking opportunities to recover groundwater production by adding additional wells to replace <br />Mocho I. <br />As discussed in Section 6.2.4, Zone 7 and Pleasanton are evaluating the feasibility of constructing <br />additional municipal supply wells in the Bernal Subbasin. This Joint Regional Groundwater Wells project <br />would serve both Zone 7 and Pleasanton. The project would enable the City to access its annual GPQ <br />(3,500 AFY) and would expand Zone 7’s existing Hopyard Wellfield in the Bernal Subbasin, an area <br />currently outside of the PFAS plume. If successful, the project is expected to improve the region’s water <br />supply reliability and drought resilience.