The Richards-Gebaur South air monitor sits on land that once housed the Richards-Gebaur Air Force Base, named after two Kansas City area veterans. The air monitoring station is located upwind of the Kansas City metropolitan statistical area, so it helps determine ozone and PM2.5 concentrations in the region — usually before gusts of wind enter the Kansas City metropolitan area.


Ozone Pollutant

The primary National Ambient Air Quality Standard for ozone is 0.070 parts per million averaged over eight hours (annual fourth-highest daily maximum 8-hour concentration, averaged over three years). The federal ozone season for monitoring runs from March 1 to Oct. 31.

Departmental information about ozone (O3)

  • Description
  • Health effects
  • Tips to reduce ozone
  • 2008 and 2015 standards plus related documents
  • Eight-hour ozone design values
  • Four highest eight-hour ozone values from beginning of ozone season
  • Running list of sites with exceedances from beginning of season
  • Monthly number of exceedances, 2021 and 2022
  • Daily maximum average eight-hour concentration for each site from beginning of season
  • Map of Missouri's ozone monitoring sites

Fine Particulate Matter (PM 2.5)

Departmental information about particulate matter (PM)

  • Description of two groups of particulate matter: PM2.5 and PM10
  • 1997, 2006 and 2012 standards for PM2.5 plus related documents
  • 2006 PM10 standard and pertinent documents
  • Annual PM2.5 design values
  • 24-Hour PM2.5 design values
  • Map of PM2.5 sites
Richards-Gebaur South Air Monitoring Site

1802 E. 203rd Street
Belton, MO 64012
United States

Date Established
Pollutants Monitored
Particulate Matter
38.75961, -94.57983