The Environmental Protection Agency has set certain permissible levels, known as the National Ambient Air Quality Standards, for six common air pollutants: ozone, lead, particulate matter, sulfur dioxide, carbon monoxide and nitrogen dioxide. These levels, or  standards, are based on what concentration of a specific pollutant it would take to become a health or environmental hazard. The Missouri Department of Natural Resources maintains a system of air monitors across the state to check the levels of these six common air pollutants as well as many other pollutants.

More detail about each of the six common air pollutants is available by clicking on the pollutant.

  1. Ozone
    Summary of Monitored Ozone Values
    Preliminary 1-hour O3 parts per million, CST
    Preliminary 8-hour O3 parts per million, CST

  2. Lead
    Quarterly Quality Assured Data

  3. Particulate Matter or Particulate Matter Forecasts
    Summary of Monitored PM2.5 Values
    Preliminary 1-hour PM 10 (µg/m3), CST
    Preliminary 1-hour PM2.5 (µg/m3), CST
    Summary of Monitored PM10 Values

  4. Sulfur Dioxide
    Summary of Monitored Sulfur Dioxide Values
    Preliminary 1-hour SO2 parts per billion, CST

  5. Carbon Monoxide
    Summary of Monitored Values of Carbon Monoxide
    Preliminary 1-hour CO parts per million, CST

  6. Nitrogen Dioxide
    Summary of Monitored Nitrogen DioxideValues
    Preliminary 1-hour NO2 parts per billion, CST

Monitoring Network Plans

Five Year Monitoring Network Assessments

2015 Monitoring Network Assessment
2010 Monitoring Network Assessment

Air Quality Monitoring Meetings

Related Links

Air Quality
AIRNow Publications
Current Ozone and Particle Maps
National AQI Summary

NOAA Forecast Maps
NOAA New's update
Other Environmental Links
Statewide Network of Air Monitoring Sites

There are many other air pollution data websites available.