Our Service Areas

A Century of Service in the West

California Water Service Group provides a reliable supply of safe, clean water and wastewater service to more than 2 million people in California, Hawaii, New Mexico, Texas, and Washington. We are the third-largest publicly traded water utility in the U.S. and proud to have served our communities for more than 90 years.


36,600 Customers

5,068 Water delivered annually (in thousand cubic meters)

425 Neighborhoods

More about Washington Water


494,500 Customers

351,788 Water delivered annually (in thousand cubic meters)

100 Communities

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New Mexico

8,600 Customers

1,733 Water delivered annually (in thousand cubic meters)

10 Communities

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5 Wastewater utilities

More about Texas Water


6,200 Customers

12,068 Water delivered annually (in thousand cubic meters)

7 Districts

More about Hawaii Water

Our Service Areas

Delivering Safe Water Across the US

California Water Service

Cal Water serves about 2 million people through 492,600 service connections in California.

Hawaii Water Service

Hawaii Water provides water services to over 5,300 customers covering three islands in Hawaii.

New Mexico Water Service

New Mexico Water encompasses the water services in four areas in New Mexico.

Texas Water Service

Texas Water is an investment in a utility development company that owns and operates four wastewater utilities in Central Texas.

Washington Water Service

Washington Water provides service to over 36,600 customers in the state of Washington.