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Regulatory Air Monitoring Network
Learn about the Air District's regulatory air monitoring network and special air quality studies.
The Air District maintains a comprehensive air quality monitoring network of 29 stations distributed among the nine Bay Area counties.
Various instruments at these stations measure 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, known as criteria air pollutants. The network also measures concentrations of various pollutants that increase the understanding of the sources of the criteria air pollutants, as well as 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
2026 Air Monitoring Network Plan
The Air District released its latest Air Monitoring Network Plan(7 Mb PDF) on May 18, 2026, for public comment. The plan provides a summary of the regulatory air monitoring network in 2025 and proposed network changes through 2027. The proposed changes may be found in the section titled “Proposed Modifications to the Network through 2027.” The Air District is soliciting comments from the public on this plan from May 18, 2026, through June 17, 2026.
Comments can be submitted using the Public Comment Form below or by email to analysis@baaqmd.gov. If your comment submitted via the Public Comment Form or via email includes personally identifiable information, such as name, email address, and location, that information may be released publicly. Comments can be submitted anonymously via the Public Comment Form.
Public Comment Form
Submit a Comment
Air Monitoring Network Documents
AMN Annual Plan Comments
Last Updated: 5/18/2026