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Environmental Air Pollution Control Monitoring Program

Ensuring the quality of the air you breathe

You can access air quality monitoring results for Missouri and the Saint Louis County area directly from the online services of the Missouri Department of Natural Resources. Saint Louis County DPH reports monitoring results directly to the State DNR. You'll be querying their database, so use the following paths for the statewide network, the Saint Louis sites, or go straight to a particular site from the list below.

  • The statewide network page gives you a map of Missouri's air monitoring data links.

  • The Saint Louis sites page provides a list of area air quality monitoring sites. Click on any one

    of them for recent detailed information, charts and graphs.

  • Sites in Saint Louis County:

    Hunter Avenue, Clayton

    Pollutant(s) Monitored: Sulfur Dioxide (SO2), Nitrogen Dioxide (NO2), Inhalable Particulate (PM2.5)

    Clayton Animal Shelter, Clayton

    Pollutant(s) Monitored: Lead (Pb)

    South Lindbergh, Sunset Hills

    Pollutant(s) Monitored: Nitrogen Dioxide (NO2), Carbon Monoxide (CO)

    Maryland Heights, Lakeside Center

    Pollutant(s) Monitored: Sulfur Dioxide (SO2), Nitrogen Dioxide (NO2), Ozone (O3)


    Pollutant(s) Monitored: Ozone (O3)


    Pollutant(s) Monitored: Inhalable Particulate (PM10)

    Other Resources:

    EPA Local Trends in Air Quality

    Local trends are available at individual monitoring locations by selecting a pollutant and location from a map.


    In partnership with other agencies, the U.S. EPA developed the AIRNow Web site to provide the public with easy access to national air quality information. The Web site offers daily AQI forecasts, as well as real-time AQI conditions for over 300 cities across the US in an easy to interpret graphical format.

    Air Quality Index - Missouri

    The state of Missouri continually updates this report, which also includes information on Kansas City and Springfield.

    St. Louis Regional Clean Air Partnership

    Since 1995, the St. Louis Regional Clean Air Partnership has operated to increase awareness of regional air quality issues and to encourage activities to reduce air pollution emissions.

    Other Information:

    View Saint Louis County's Air Pollution Ordinance (266K)

    (Requires Acrobat Viewer)

    The County's new Asbestos Regulation 612.530 starts on page 37 of the document.