The California Environmental Data Exchange Network (CEDEN)
is a central location to find and share information about California’s water bodies, including streams, lakes, rivers, and the coastal ocean. Many groups in California monitor water quality, aquatic habitat, and wildlife health to ensure good stewardship of our ecological resources. CEDEN aggregates this data and makes it accessible to environmental managers and the public.

For more information, a one page CEDEN Fact Sheet and nine page Information Document are available for download.

News & Highlights

Please note that the contracts that the Water Boards have with most of the Regional Data Centers (RDC) are no longer in place. While Water Board staff are working to reinstate RDC support, vocabulary requests and inquiries should be directed to ceden@waterboards.ca.gov and responses to these will likely be delayed. We apologize for the inconvenience.

Providing Data for the 303(d) List
See our new page regarding providing data to be assessed for the development of California’s Clean Water Act Section 303(d) list.