San Francisco County, California — public water systems

How does San Francisco County compare with other California counties?

San Francisco County has the 60th-most active public water systems among the 201 counties listed for active California systems in EPA records; among the 72 with 3 or more systems, the median has 73. Its systems report 1,040,304 people served in total, the 10th-largest county figure in the state and 2.4% of the statewide total. The average system here reports serving 130,038 people, about 23 times the California average of 5,706. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.

Where does San Francisco County's drinking water come from?

By primary water source, San Francisco County's active systems draw on purchased surface water (5, 63%) and surface water (3, 38%). Overall, none rely mainly on groundwater (including purchased groundwater) and all on surface water, compared with 85% and 15% across California. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. The county's largest system, Sfpuc City Distribution Division, draws primarily on purchased surface water.

What kinds of water systems operate in San Francisco County?

San Francisco County's active systems break down as 5 community systems (63%), 1 non-transient non-community systems (13%) and 2 transient non-community systems (25%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as local government (75%) and federal government (25%).