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). California Water Service Group also includes CWS Utility Services and HWS Utility Services.

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.