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  2. United States
  3. Missouri
  4. St. Louis County

St. Louis County

Missouri

2026-10-20 21:00
AQI (US)
Moderate
Pollutants|Pollens
O3
μg/m³
118.9
PM10
μg/m³
21.9
NO2
μg/m³
42.5
PM2.5
μg/m³
2.7
SO2
μg/m³
3.1
Weather
  • ℃
  • ℉
22℃
43%
9 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • O3
  • PM10
  • NO2
  • PM2.5
  • SO2
Places included
Airport Township
AQI 20
Bonhomme Township
AQI 25
Chesterfield Township
AQI 25
Clayton Township
AQI 20
Concord Township
AQI 25
Creve Coeur Township
AQI 19
Ferguson Township
AQI 22
Gravois Township
AQI 23
Hadley Township
AQI 19
Jefferson Township
AQI 20
Lemay Township
AQI 25
Lewis and Clark Township
AQI 19
Maryland Heights Township
AQI 51
Meramec Township
AQI 60
Midland Township
AQI 19
Missouri River Township
AQI 23
Normandy Township
AQI 19
Northwest Township
AQI 19
Norwood Township
AQI 18
Oakville Township
AQI 25
Queeny Township
AQI 25
Spanish Lake Township
AQI 27
St. Ferdinand Township
AQI 25
Tesson Ferry Township
AQI 25
University Township
AQI 19
Wildhorse Township
AQI 25
Data Sources
http://www.airnow.gov/

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Cities Nearby

Huntleigh
AQI 25
Des Peres
AQI 25
Crystal Lake Park
AQI 25
Warson Woods
AQI 19
Rock Hill
AQI 19
Kirkwood
AQI 25
Frontenac
AQI 19
Glendale
AQI 25
Country Life Acres
AQI 25
Oakland
AQI 25
Westwood
AQI 19