Flood Control District


You can find our office in the Contra Costa Public Works Department Building at:

255 Glacier Drive
Martinez, CA 94553
Phone: 925-313-2000
Fax: 925-313-2333

Please visit the general Public Works Department page for postings of general information and office hours. We can also be reached by email

If you need to report flooding in the unincorporated county, please contact our Maintenance division at 925-313-7000. If you have drainage fee questions, please call 925-313-2000 and ask for the Flood Control Counter Duty staff member.

The Flood Control and Water Conservation District covers all of Contra Costa County, including its cities, and owns property throughout the county for the purpose of constructing and maintaining regional flood control facilities, including approximately 79 miles of channels, creeks, and other drainage and 30 detention basins and dams. 

The District was formed in 1951, and has been protecting the communities of Contra Costa County ever since. The District offers regional flood protection, and also provides technical information and education to cities and residents. Its operations are primarily funded through property taxes and developer fees. Please explore our website to learn more about the services that the District offers.