About Us

California Water Service Group

Contact Information

California Water Service Group
1720 North First Street
San Jose, CA 95112-4508
(408) 367-8200
(800) 750-8200 toll-free

Corporate Information

California Water Service Group (NYSE:CWT) is the third-largest publicly traded water utility in the United States, providing high-quality water and wastewater services to about two million people in more than 100 communities through four subsidiaries: California Water Service (Cal Water), Hawaii Water Service (Hawaii Water), New Mexico Water Service (New Mexico Water), and Washington Water Service (Washington Water).

Company-wide, Cal Water employees share a commitment to being the leading provider of water and wastewater services and improving the quality of life for our customers, communities, stockholders, and employees.