RES 2024025 - Laserfiche WebLink

23 THE WATER SYSTEM General The City’s water facilities produce, treat, store, and deliver drinking (i.e., potable) water to its customers, which include all City residents and commercial customers, as well as portions of unincorporated Alameda County (i.e., Remen Tract, Happy Valley, and the area west of Foothill/Sunol). Besides drinking water, the City delivers recycled water to a portion of customers within its service area, mainly for landscape irrigation. Recycled water is highly treated wastewater that can be used for non-potable purposes like landscape irrigation, toilet flushing, and cooling. The City owns and operates a separate storage and pipeline system for recycled water. The City’s wholesale water supplier the Alameda County Flood Control and Water Conservation District’s Zone 7, also known as the Zone 7 Water Agency (“Zone 7”), which is a contractor of the State Water Project (SWP). In addition to the City, Zone 7 sells water to three other retail customers: the city of Livermore, the Dublin-San Ramon Services District, and California Water Service Company - Livermore District. The City produces water by pumping it from City-owned wells (groundwater) and purchasing treated water from Zone 7. Groundwater is treated before it enters the distribution system. The City also owns and operates an extensive network of pipelines and pumping facilities to deliver drinking water to its customers. The City’s Department of Public Works is responsible for the operation, maintenance and improvement of the Water System. Service Area The City’s water service area includes the City, as well as customers in unincorporated Alameda County in Remen Tract, along Happy Valley Road and Kilkare Canyon Road (just north of the Town of Sunol), and west of Foothill Road. The service area lies within the Alameda Creek watershed, a drainage basin covering about 675 square miles between Mount Hamilton and Mount Diablo. Single family residential remains the largest water customer sector in Pleasanton (56 percent of all potable demands in 2023). The Water System presently serves approximately 80,000 persons, including over 22,600 active water service accounts. Physical Assets Turnouts. Water from Zone 7 enters the City’s Water System at seven different turnout locations. All turnouts are equipped with facilities to fluoridate the water provided by Zone 7 prior to entering the City system. Five of the turnouts directly connect to the City system, while the remaining two supply water pump stations pump into the City water system. Groundwater Wells. The City owns and operates three groundwater wells in the local groundwater basin, the Livermore Valley Main Groundwater Basin (the “Main Basin”) an area that covers 69,600 acres (109 square miles). Water from the City’s wells is treated with chlorine, ammonia, and fluoride at the well sites prior to entering into the water distribution system. The three City groundwater wells that deliver 20 percent of the City’s water supply have not been in operation since November 2022 based on results from testing for per- and polyfluoroalkyl