California Water Service Company (Cal Water)

California Water Service Company (Cal Water) is the largest investor-owned American water utility west of the Mississippi River and the third largest in the country. Formed in 1926, the San Jose-based company serves more than 460,000 customers through 28 Customer and Operations Centers throughout the state.

Cal Water is the largest subsidiary of the California Water Service Group, which also includes Washington Water Service Company, New Mexico Water Service Company, Hawaii Water Service Company, and CWS Utility Services. 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 leader in providing our customers and communities with traditional and innovative utility services. For us, it's all about customer service. After all, there is a reason we have "service" in our name.

Water is earth's most precious resource. And with California's Mediterranean climate, unpredictable rainfall, and growing population, we cannot take our water supply for granted. We must use water wisely to ensure we have an adequate, high-quality water supply, both now and in the future. Not only do conservation efforts help save this precious resource, they can also help reduce water bills. It's a win-win situation.

Conserving water is easy to do. From our end, Cal Water tries to reduce water loss through water distribution system leaks by maintaining and upgrading our infrastructure regularly. We also sponsor education and plumbing retrofit programs to help customers use water wisely. Visit our conservation links to learn easy ways to conserve water, both indoors and out, and get other conservation information. Here, you can also find out how to get free water-saving plumbing fixtures and rebates for purchasing other water-saving household items, and you can learn about school education programs and materials offered by Cal Water.