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About Us


Diablo Water District is an independent, self-governing local public agency created on May 7, 1953, under the County Water District Law of California. The District is governed by an elected five-member Board of Directors.

Our Mission

The mission of Diablo Water District is to provide a safe, dependable, and adequate supply of high-quality, potable water to meet the requirements of the residents and businesses in our service area.

The District strives to operate in an environmentally responsible manner, following principles of good business and sound engineering, to provide the best possible service at the lowest reasonable cost. We are committed to treating all customers and employees fairly.

Who We Serve

The District, with a staff of 19 employees, obtains, treats, and supplies water for about 42,000 people and the parks, schools, and businesses throughout a 21-square-mile area consisting of Oakley, Cypress Corridor, and Hotchkis Tract, as well as Summer Lakes, and portions of Bethel Island and Knightsen.