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BACKGROUND In December 2014, Pleasanton, along with cities of Dublin, Livermore, San Ramon, the Dublin San Ramon Services District (DSRSD) and Zone 7 entered into the Tri-Valley Intergovernmental Reciprocal Services Master Agreement (Agreement). The objective of the Agreement is for the agencies to share among and between themselves resources that support government functions and for joint purchase of equipment and/or supplies or procurement of contracting or consulting services. The intent is to save time and money between the agencies by streamlining processes that are of similar nature. Pleasanton has exercised the task orders under the Agreement for various maintenance repairs, projects and studies with the last task order being the Joint Tri-Valley Potable Reuse Technical Feasibility Study. In May 2018, Dublin San Ramon Services District (DSRSD), California Water Service Company (Cal Water), the cities of Livermore and Pleasanton, and Zone 7 Water Agency (Zone 7) completed the Joint Tri-Valley Potable Reuse Technical Feasibility Study, which demonstrated that it was technically feasible for a joint Tri-Valley Potable Reuse project to meet 7% - 15% of the build-out water demands of the Tri-Valley based on approved General Plans. The 2019 Water Supply Evaluation Update (2019 WSE Update) completed by Zone 7 in April 2019 reaffirmed and clarified the need to pursue water supply options to enhance long-term water supply reliability for the Livermore-Amador Valley. Potential future water supply, conveyance, and water storage options identified in the 2019 WSE Update include Sites Reservoir, Los Vaqueros Reservoir, potable reuse, short- and long-term water transfers, the California WaterFix (since renamed the Delta Conveyance), and regional desalination. At the July 24, 2019 meeting of the Tri-Valley Water Liaison Committee (Committee) — which includes elected representatives from the cities of Dublin, Livermore, Pleasanton, and San Ramon, DSRSD, and Zone 7, as well as corporate representation by Cal Water— discussed and supported further study of a regional potable reuse project. The Committee determined that joint collaborative efforts by the Tri-Valley water agencies should be undertaken to: 1) further technical and institutional study of potable reuse, 2) continue to evaluate other water supply reliability options, and 3) develop a community outreach/engagement program to educate the Tri-Valley residents and businesses on the region's water supply challenges and potential solutions. Committee representatives from the cities of Pleasanton and Livermore, DSRSD, and Zone 7 expressed support for joint funding of such efforts. Cal Water, a private investor-owned utility, may later become a partner in sharing the costs of further study. DISCUSSION As part of its core mission, Zone 7 is responsible for assuring a reliable and sustainable water supply for the Tri-Valley. In fulfillment of this mission, Zone 7 is proceeding with a number of studies and programs, including a regional water demand study, a 2020 update of the Water Supply Evaluation, the Zone 7 2020 Urban Water Management Plan, as well as participation in Sites Reservoir, Los Vaqueros Reservoir Expansion, Delta Conveyance, the Bay Area Regional Desalination Project. Further studies to evaluate a regional potable reuse project will require collaboration, coordination, and Page 2 of 4