Contact Us

We're here to help

You can reach us at 925-688-8000 during regular business hours or send us an email.

Water emergency? To report suspicious activity, or to report leaks in the street, we are available 24/7 at 925-688-8374.

Physical address

Contra Costa Water District
1331 Concord Avenue
Concord, CA 94520
Temporarily closed to the public.

Mailing address

Contra Costa Water District
P.O. Box H20
Concord, CA 94524

Call us

General925-688-8000
Emergencies925-688-8374
Water Quality Hotline925-688-8156
Water Efficiency925-688-8320
Engineering Support925-688-8014
Public Affairs925-688-8109
Los Vaqueros Marina925-371-2628
Water Education925-588-1909