District Information

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Bayshore
(Bay Area Region)
Customer Center
341 North Delaware Street
San Mateo, CA 94401
8:00 AM to 4:30 PM
(650) 558-7800
Contact us via email
After-Hours Phone Number
(650) 558-7800
Automated Payment Number
(866) 734-0743
Payment Mailing Address
California Water Service
P.O. Box 4500
Whittier, CA 90607-4500
Interim District Manager
Mike Utz

Infrastructure Improvements

Serving San Carlos, San Mateo, and South San Francisco

Cal Water's Bayshore District was formed in 1931 with the purchase of the South San Francisco Water Company, the San Carlos Water Company, and the San Mateo water system from Pacific Water Company. We proactively maintain and upgrade our facilities to ensure a reliable, high-quality supply.

San Carlos

Water for our San Carlos customers is purchased from the City and County of San Francisco (SFPUC). The San Carlos system utilizes 17 storage tanks and 24 booster pumps.

San Mateo

Water for our San Mateo customers is also purchased from the City and County of San Francisco (SFPUC). The San Mateo system has 18 storage tanks and 30 booster pumps.

South San Francisco

Water for our customers is purchased from the City and County of San Francisco (SFPUC), and additional water was provided by five groundwater wells. Our South San Francisco system includes 144 miles of pipeline, 12 storage tanks, one collecting tank, and 21 booster pumps.

Closest Western Union Pay Stations
Business Address City ZIP Code
Anchor Drugs481 Grand AveSouth San Francisco94080
Chavez Supermarket500 S Norfolk StSan Mateo94401
Fast Money947 El Camino RealSouth San Francisco94080
J & J Check Cashing220 Cypress AveSouth San Francisco94080
Safeway #0639100 De Anza BlvdSan Mateo94402
Safeway #077730 Chestnut AveSouth San Francisco94080
Safeway #09701655 S El Camino RealSan Mateo94402
Sunshine Center Pharmacy1166 Mission RdSouth San Francisco94080