Corporate Information

Contact Information
Customer Support Services
(Corporate headquarters)
1720 North First Street
San Jose, CA 95112
(408) 367-8200

To report a problem with your water, visit the Contact Us page. For corporate, investor, and employment information, visit the California Water Service Group web site.

Hawaii Water Service is a subsidiary of California Water Service Group, which also includes California Water Service, Washington Water Service, Texas Water Service, and New Mexico Water Service. As a whole, the Group provides high-quality regulated and non-regulated utility services to approximately 2 million people in 100 communities. Company-wide, our employees share a commitment to being the leading provider of water and wastewater services and delivering quality, service, and value to our customers.

About California Water Service Group

California Water Service Group has been named one of “America’s Most Responsible Companies” and “World’s Most Trustworthy Companies” by Newsweek and a Great Place to Work®.