District Information


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(Bay Area Region)

341 North Delaware Street
San Mateo, CA 94401

Customer Service
7:00 a.m. to 7:00 p.m.
(650) 558-7800
Contact us via email

District Manager
Ross Moilan

After-Hours Phone Number
(650) 558-7800

Automated Payment Number
(888) 598-9824

Payment Mailing Address
California Water Service
P.O. Box 7229
San Francisco, CA 94120-7229

Bayshore phone service is scheduled to be available at 7:00 a.m. today.

If you have a water-related emergency, please contact Cal Water using the Bayshore after-hours phone number.

Serving Bayshore, Broadmoor, Colma, Daly City, Mid-Peninsula, Palomar Park, 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

Note: In addition to the locations listed below, you can also make a payment at any Western Union nationwide that offers its Quick Collect service.

Business Address City ZIP Code
Walgreens #180722 San Pedro RdDaly City94014
Walgreens #53656100 Mission StDaly City94014
Safeway #3031601 Westlake CenterDaily City94015
Walgreens #324216 Westlake CtrDaly City94015
Walgreens #21261414 El Camino RealSan Carlos94070
Friends Market200 San Felipe AveSouth San Francisco94080
J & J Check Cashing220 Cypress AveSouth San Francisco94080
Pak-N-Save #31162255 Gellert BlvdSouth San Francisco94080
Safeway #077730 Chestnut AveSouth San Francisco94080
Sunshine Center Pharmacy1166 Mission RdSouth San Francisco94080
Walgreens #153972238 Westborough BlvdSouth San Francisco94080
Walgreens #3346399 El Camino RealSouth San Francisco94080
CA Check Cashing #564610 S Norfolk StSan Mateo94401
Chavez Supermarket500 S Norfolk StSan Mateo94401
Walgreens #3296191 E 3rd AveSan Mateo94401
Rite Aid #5902666 Concar DrSan Mateo94402
Safeway #0639100 De Anza BlvdSan Mateo94402
Safeway #09701655 S El Camino RealSan Mateo94402
Rite Aid #59031320 W Hillsdale BlvdSan Mateo94403
Rite Aid #59031320 W Hillsdale BlvdSan Mateo94403
Walgreens #50064070 S El Camino RealSan Mateo94403