Ensuring Safe, Clean Water to Communities Around the U.S.
California Water Service Group is committed to being the leading provider of sustainable water and wastewater services. As the third-largest publicly traded water utility in the United States, we serve more than two million people in five states.

Company Profile
California Water Service Group is the parent company of regulated utilities California Water Service, Hawaii Water Service, New Mexico Water Service, and Washington Water Service along with Texas Water Service, a utility holding company. Together, these companies provide regulated and non-regulated water and wastewater service to more than 2 million people in California, Hawaii, New Mexico, Texas, and Washington.
Consistent Financial Growth
Operating Revenue
Year Over Year (In Millions)
As of Dec. 31, 2022 • 10-K 2022
Net Income
Year Over Year (In Millions)
As of Dec. 31, 2022 • 10-K 2022
For complete information regarding our financials, see our periodic filings.
Creating Long Term Sustainability in Our Environmental, Social, and Governance Practices
As a provider of a finite, natural resource, we are keenly aware of the need to utilize sustainable practices in our daily operations, and we continue to focus on our responsibility to our stakeholders through ethical business practices and community support.
View Our ESG PrioritiesIR Contacts
Corporate Office
California Water Service Group
1720 North First Street
San Jose, CA 95112
Toll-Free: (800) 750-8200
T: (408) 367-8200
Transfer Agent
Computershare
T: (781) 575-3100 (US, Canada, Puerto Rico)
T: (781) 575-3100 (non-U.S.)