Annual Monitoring Network Report
Contact
The Draft version of the California Air Resources Board 2025 Annual Network Plan, covering monitoring operations in 26 Air Districts in California is now available for public review. The public review period ends on June 22, 2025. Any comments or questions regarding the network report should be directed to:
Jin Xu, Manager, Air Quality Analysis Section
Federal regulations require that the Annual Network Plan be submitted to the U.S. Environmental Protection Agency (U.S. EPA) after the 30-day public review period. Any comments received during the review period will be forwarded to the U.S EPA along with the Annual Network Plan.
CARB Annual Network Plan
Note that there are 35 air districts in California. Nine air districts that conduct ambient are quality monitoring are developing separate Annual Network Plans covering the ambient monitoring within their jurisdictions. This Annual Network Plan covers the 26 air districts for which the local air agencies are not drafting a separate report.
For additional information on California's monitoring network, visit Monitoring Site Information.