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OVERVIEW
The Purissima Hills Water District provides service to two-thirds of the Town of Los Altos Hills, a rural community adjacent to the cities of Palo Alto and Los Altos, and unincorporated Santa Clara County to the south. The District serves predominantly single-family homes on minimum one-acre lots. The largest customer is Foothill College.
Purissima Hills Water District receives 100% of its water supply from San Francisco Public Utilities Commission (SFPUC) via two turnouts from the Hetch Hetchy pipeline along the Foothill Expressway on the northern edge of the District. The SFPUC water supply is gravity-fed through 18" transmission mains to two pump stations that pump to tanks distributed throughout the District.
The distribution system consists of 4 pressure zones, 10 tanks, 5 pumping stations, 14 pumps, and 107 miles of pipe. All services within the District are pressurized or gravity fed from tanks in the respective pressure zones. The tanks have a total capacity of 10 million gallons.
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