14 ATTACHMENT 1 EXHIBIT A - Laserfiche WebLink

A This chapter describes the City's existing water supply portfolio, which consists of potable water purchased from Zone 7, recycled water produced by DSRSD and Livermore, and groundwater pumped by the City. These existing supplies, along with the other projected future supplies, and the potential for desalinated water, indirect or direct potable reuse, and exchanges or transfers are described in this chapter. 6.1 WATER SUPPLY ANALYSIS OVERVIEW The City's primary water supply source is purchased potable water from Zone 7, supplemented by groundwater pumped from the Main Basin. The City's groundwater pumping is limited by its groundwater pumping quota (GPQ) as managed by Zone 7, the local groundwater basin manager. The City augments its potable water supply with recycled water from DSRSD and Livermore. The management of each of the City's supply sources in correlation with each other are provided in this chapter. Because a significant portion of the City's potable water supply is from Zone 7, the region's water wholesaler, Zone 7's water supplies, storage operations, and future supply projects are discussed. Management and anticipated availability of the City's water supplies is discussed under normal water years. The availability of the City's water supplies under a single dry year and a drought lasting five years, as well as more frequent and severe periods of drought, are detailed in Chapter 7 of this UWMP. 6.2 WATER SUPPLY CHARACTERIZATION This section describes the water supplies currently available to the City, as well as future anticipated water supplies. The City currently utilizes water from the following sources: • Potable water supplies (including imported and local surface water supplies and local groundwater supplies) purchased from Zone 7 • Local groundwater supplies pumped from City wells • Recycled water supplies produced at DSRSD's Regional Wastewater Treatment Facility (RWTF) and the Livermore Water Reclamation Plant (LWRP) These existing supplies, along with the other projected future supplies, and the potential for desalinated water, indirect or direct potable reuse, and exchanges or transfers are described in this section. 6.2.1 Purchased or Imported Water The City currently receives most of its potable water supply from Zone 7, a multi-purpose agency that oversees water -related issues in the Livermore Amador Valley. Zone 7 is a State Water Project (SWP) contractor that wholesales treated water to four retail water agencies: the City, DSRSD, Livermore, and Cal Water. In addition, Zone 7 retails non -potable water supplies for irrigated agricultural use, retails treated water to several direct customers, provides and maintains flood control facilities, and manages groundwater and surface water supplies in its service area. Under its current agreement with Zone 7, the City is limited in developing other water supply sources. WEST YOST 6-1 City of Pleasanton 2020 Urban Water Management Plan May 2021