2025 Urban Water Management Plan

Section 7 2025 Urban Water Management Plan Water Supply Reliability Assessment City of Pleasanton Public Draft | May 2026 7-14 EKI Environment & Water, Inc. 7.4 Water Supply Management Tools and Options Pleasanton and Zone 7 coordinate to increase regional supply reliability and reduce reliance on water imports. Pleasanton focuses on demand reduction, specifically prioritizing water conservation and encouraging recycled water use. Zone 7 promotes regional supply reliability and reduced reliance on water imports by: • Pursuing new water supply projects such as the COLCS and Sites Reservoir, which will reduce the need for imported water purchases during dry years; • Evaluating and pursuing new water supply options, including right-sizing water supply and storage options and studying the potential for potable reuse as a water supply; • Supporting the continued use of recycled water for irrigation; • Working closely with its retailers to implement an active conservation program; and • Optimizing and expanding local storage, such as the COLCS. As part of its existing CIP, Zone 7 is planning to invest in a diverse set of projects to support long-term water supply reliability. Zone 7’s CIP includes a regional wells project to expand the groundwater production system, investment in Sites Reservoir, and investment in local storage via the COLCS project, and continued study of the potential for potable reuse in the region. In addition, Zone 7 is a member of the Bay Area Regional Reliability (BARR) partnership, which brings together eight Bay Area water agencies to improve regional water supply reliability. In addition to Zone 7, these agencies include: ACWD, EBMUD, SFPUC, Bay Area Water Supply and Conservation Agency, Contra Costa Water District, Marin Municipal Water District, and Valley Water. The BARR partners have agreed to work cooperatively to address water supply reliability concerns and drought preparedness on a mutually beneficial and regionally focused basis. Near- and long-term joint water supply reliability projects may be evaluated through BARR, such as use of the capacity of existing facilities, changes to infrastructure (including new interties, recycled water, water conservation, expanded treatment, regional desalination, and water transfers and exchanges), and other projects or institutional arrangements that encourage a regional approach to achieving water supply reliability in the Bay Area.  CWC §10620 (f) An urban water supplier shall describe in the plan water management tools and options used by that entity that will maximize resources and minimize the need to import water from other regions.