The drinking water we provide to 2.7 million customers in four Bay Area counties comes from a variety of protected and carefully managed sources. By relying on multiple sources of water supply, we help protect our customers from potential disruptions in water supply from emergencies or natural disasters.
We own and operate the Hetch Hetchy Regional Water System, which serves 2.7 million customers in San Francisco and wholesale through 26 Water agencies in Alameda, Santa Clara, and San Mateo counties.
We help residents and businesses use water wisely with programs, tips and incentives.
Our water supply includes local groundwater, also known as well water. Learn more about our sourcing, storage, and treatment process.
Purified water is drinking water that comes from highly treated recycled water. It has undergone rigorous advanced treatment and disinfection to meet and exceed drinking water quality standards.
We work to conserve our precious drinking water supply by reusing water safely in many programs including irrigation.
We offer design tips and grants to encourage new building construction and retail water users to utilize rainwater and greywater for irrigation, toilet flushing, and more.