The Environmental Protection Agency sets permissible levels for six common air pollutants: ozone, lead, particulate matter, sulfur dioxide, carbon monoxide and nitrogen dioxide. EPA bases these levels, or  standards, on the concentrations at which pollutants become health and environmental hazards. These standards are known as the national air ambient quality standards (NAAQS).

The Missouri Department of Natural Resources maintains approximately 50 air monitors across the state to track concentrations of these six common air pollutants as well as many other pollutants. To access an interactive map depicting the network, click on the partial map at right.

Air Quality Monitoring Meetings

The department's Air Pollution Control Program participates in periodic meetings of local air monitoring agencies. 

May 23, 2017 — Meeting of St. Louis area air monitoring agencies

* 2016 St. Louis Area Air Quality Report, MoDNR
* 2016 Ozone Season, East-West Gateway Council of Governments
* Using Monitoring Data To Improve Emissions Inventories, St. Louis University
* Teledyne API Model 640 Field Comparison with the Thermo 1405DF and R&P 2025 FRM, MoDNR

May 17, 2016 — Meeting of air monitoring agencies in St. Louis area

2016 Air Quality Report
   2015 Ozone Season
   Sunset OC/EC PM2.5 Carbon Monitoring Project
   Ozone Chambers with Botanical Gardens
   Ozonesonde Profiles in St. Louis during the SEACIONS Campaign
   Satellite Data Analysis for Improving Emission Inventories

May 5, 2015 — Meeting of air monitoring agencies in St. Louis

2015 Air Quality Report
   2014 Ozone Season
   High Time Resolution PM Multi-Metals Measurement
   Briefing on Roxana Air Quality Study
   2015 Ozone NAAQS —Proposed PAMS Monitoring
   NO2 Measurement — A Comparison of Direct vs. Traditional Methods at a Near-roadway Site

2014 —
Meeting of air monitoring agencies in St. Louis

   2013 Ozone Season
   2014 Air Quality Report
   A PM 2.5 Episode in Missouri
   PM Visibility and Speciation
   St. Louis Near-road and Road Inventory