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

Temporary COVID-19 Lobby Hours
Monday – Thursday
8:00 am – 11:30 am and
1:00 pm – 5:00 pm

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

Common requests