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Ambient Air Monitoring Network
Learn about the Air District's ambient air monitoring network.
The Air District maintains one of the most comprehensive air quality monitoring networks in the country, consisting of over 30 stations distributed among the nine Bay Area counties.
This network measures concentrations of pollutants for which health-based ambient air quality standards have been set by the U.S. Environmental Protection Agency and the California Air Resources Board. The network also measures concentrations of various pollutants designated as Toxic Air Contaminants by the state of California.
This information is used to determine compliance with state and federal air quality standards, prepare air quality forecasts, develop air quality plans, provide information for permit modeling, prepare environmental impact reports, and track air quality trends.
Pollutants measured by the monitoring network include:
- Ground-level ozone
- Carbon monoxide
- Nitrogen oxides
- Sulfur dioxide/oxides
- Particulate matter
- Hydrogen sulfide
Air Monitoring Network Documents
AMN Annual Plan Comments
Last Updated: 6/21/2025