California Air Resources Board

The following selectable options create a list of Agencies currently operating throughout California.  
Each Agency name provides a link to a table of air monitoring sites operated by that agency, and the pollutants that are monitored at each site.  From the Agency site list, highlighted site names provide links to information regarding each air monitoring station that are audited by the Quality Assurance Section.

Note: Not all sites or parameters are audited by QAS, and information is subject to change. Please use the link below to notify QAS of any changes or corrections.