Missouri operates approximately 50 air monitoring sites across the state. The monitors measure pollutants and collect data to determine whether Missouri meets federal and state air quality standards, report daily air quality and track trends in air pollution levels over time. Select an air monitoring site to learn more about each pollutant monitored and the data results for each site.
- Air Monitoring Sites in Jefferson County
- Air Monitoring Sites in Southeast Missouri
- Air Monitoring Sites - GIS Map
To sort the table by field, click on the County or Station column headings in the table.
| County Sort descending | Station | Pollutants Monitored |
|---|---|---|
| St. Louis (city) | Branch Street Air Monitoring Site | Particulate Matter |
| St. Louis (city) | Forest Park, Near Road, Air Monitoring Site | Carbon Monoxide, Nitrogen Dioxide, Particulate Matter |