Contra Costa Water District

The Contra Costa Water District delivers safe, clean water to approximately 500,000 people in central and eastern Contra Costa County in Northern California. Formed in 1936 to provide water for irrigation and industry, CCWD is now one of the largest urban water districts in California and a leader in drinking-water treatment technology and source water protection.

Diablo Water District

For more than a half-century Diablo Water District has been providing high quality water for residents and businesses in our service area. The District is committed to quality, thoroughness, and personal service. The latest technology is used to ensure that we meet our commitment to you. Diablo Water District is a 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.

Ironhouse Sanitary District

In existence since 1945, ISD utilizes a staff of 24 field and office personnel to maintain sanitary services for nearly 30,000 customers in the Oakley and Bethel Island area. The district treats approximately 2 million gallons of wastewater every day at our modern treatment facility located near Walnut Meadows Drive, north of Highway 4 in Oakley. Reclaimed water is spread on fields ISD owns near the Oakley plant, and on 3,600-acre Jersey Island.
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