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.

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