Annual Monitoring Network Report

This page last reviewed on July 17, 2015

The final version of the 2015 Annual Monitoring Network Report for 25 Air Districts in California Volume 1 / Volume 2 (PDF) is now available.

Any comments or questions regarding the network report should be directed to:

Ms. Gayle Sweigert, Manager, Air Quality Analysis Section at (916) 322-6923.

Federal regulations require that the annual monitoring network report be submitted to the U.S. Environmental Protection Agency (U.S. EPA) after the public review period has concluded.

Please note that ten local air agencies in California that operate monitoring sites are developing separate Annual Network Plans covering the ambient monitoring within their jurisdictions. This report consists of 25 air districts for which the local air agencies are not drafting a separate report.

Additional information on California's monitoring network can be viewed at: