About Us

• California Environmental Data Exchange Network (CEDEN) is the State Water Board's data system for surface water quality in California.
• CEDEN consolidates California's water quality data in a central location, where it can be easily accessed and used.
• CEDEN currently includes five different data types:
  • Chemistry (Water Quality)
  • Tissue
  • Taxonomy
  • Toxicity
  • Habitat

How CEDEN data are used

• CEDEN data are available for use by the public, including organizations interested in water quality, scientists, citizen groups for reports and research purposes.
• The Water Boards use CEDEN data to assess surface water quality and produce the Integrated Report.

How do data get into CEDEN?

• Any user can submit data on their own or work with a Regional Data Center (RDC) that will assist the user in submitting data for a fee.
• For more information on submitting data to CEDEN: Submit Data.

What is CEDEN 2.0?

• The Water Boards are in the process of updating the CEDEN data system, the new system is referred to as CEDEN 2.0.
• For more information on CEDEN 2.0 Development: CEDEN 2.0.

Learn more about CEDEN

• CEDEN User Group: Anyone may attend User Group meetings to share input and receive updates on CEDEN management.