Water service in San Mateo County may be provided by the county water authority, individual municipal water departments, or rural water districts, depending on where a property is located. There are 7 Water Departments locations in San Mateo County, California.

Property owners in San Mateo County who are connecting a new building to public water or requesting a new meter installation should contact the applicable water department well in advance, as permit review, inspection scheduling, and tap fee collection may take several weeks before service can begin.

List of San Mateo County, California Water Departments

Calera Creek Water Department

View Details Call Now (650) 738-4660

Calera Creek Water Department

Address
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Hours

Daly City Water Department

View Details Call Now (650) 991-8200

Daly City Water Department

Address
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Hours

San Bruno Water Department

View Details Call Now (650) 616-7162

San Bruno Water Department

Address
Get Direction
Hours

Hillsborough Town Water Department

View Details Call Now (650) 375-7402

Hillsborough Town Water Department

Address
Get Direction
Hours

East Palo Alto Water Department

View Details Call Now (650) 363-4000

East Palo Alto Water Department

Address
Get Direction
Hours

San Francisco Water Department

View Details Call Now (650) 872-5900

San Francisco Water Department

Address
Get Direction
Hours

Millbrae Water Department

View Details Call Now (650) 259-2388

Millbrae Water Department

Address
Get Direction
Hours

Residents of San Mateo County who rely on private wells rather than a public water system should contact the county health department for information about voluntary testing programs. The county water department can advise on whether extending public water service to a private-well property is feasible in your area.

You may also find Water Departments locations in neighboring counties including San Mateo, City and County of San Francisco, Alameda.