This site is administered by the Department of Water Resources, Division of Planning and Division of Environmental Services.

For questions concerning the data and operation of the website, please email DWR at wdlweb@water.ca.gov

DWR is modernizing the Water Data Library, working to improve the functionality you have come to rely upon and introduce enhancements to make the site even better. New features and functionality will be added in the coming weeks and months. Use this form to provide input for how we can make the Water Data Library site even better.