California Water Service

  • Utilities
195 South N Street
Livermore, CA 94550-4649
(925) 447-4900
(925) 373-6834 (fax)
  • About

    California Water Service (Cal Water) is the largest regulated American water utility west of the Mississippi River and the third largest in the country. Formed in 1926, the San Jose-based company serves 484,900 customer connections through 28 Customer and Operations Centers throughout the state.

  • Whom to Contact

    • Mr. Frank Vallejo
      Operations Manager
      Phone: (925) 447-4903