California Department of Water Resources

Our mission is to sustainably manage the water resources of California, in cooperation with other agencies, to benefit the state's people and protect, restore, and enhance the natural and human environments. Established in 1956 by the California State Legislature, DWR protects, conserves, develops, and manages much of California's water supply. This includes the State Water Project (SWP), the nation’s largest state-built water conveyance program. For more information, visit https://water.ca.gov/

Visit our Data Ecosystem to see list of our Data Vendors.