Air monitoring is required under the federal Clean Air Act (CAA). The State of Missouri operates a network of about 50 ambient air monitoring sites across the state. This network is used to determine whether areas in Missouri are meeting the primary National Ambient Air Quality Standards (NAAQS) and help develop information on air quality for the citizens of Missouri.
The air monitors measure air pollutants and send data to the U.S. Environmental Protection Agency's national database of air monitoring data, called the Air Quality System (AQS). Concentrations of most air pollutants are measured continuously, with hourly averages reported. Select an air monitoring site in the table below to learn more about each pollutant monitored and the data results for each site.
*To sort the table by field, click on the County or Station column headings in the table. You can "click" on the monitoring site's name to access information about the site, daily summary report and other related reports.
| County | Station | Pollutants Monitored |
|---|---|---|
| Franklin | Labadie Southwest Industrial Air Monitoring Site | Sulfur Dioxide |
| Franklin | Labadie Valley Industrial Air Monitoring Site | Sulfur Dioxide |
| Greene | Fellows Lake Air Monitoring Site | Ozone |
| Greene | Hillcrest High School Air Monitoring Site | Ozone, Particulate Matter |
| Holt | Forest City Exide Levee Air Monitoring Site | Lead |
| Iron | Buick Northeast Air Monitoring Site | Lead, Sulfur Dioxide |
| Iron | Doe Run Buick County Road 75 Industrial Air Monitoring Site | Sulfur Dioxide |
| Iron | Doe Run Buick Hwy 32 Northeast Industrial Air Monitoring Site | Sulfur Dioxide |
| Iron | Doe Run Buick North #5 Air Monitoring Site | Lead |
| Iron | Doe Run Buick South #1 Air Monitoring Site | Lead |