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  4. St. Louis County

St. Louis County

Missouri

2026-10-18 06:00
AQI (China)
Excellent
Pollutants|Pollens
PM10
μg/m³
26
PM2.5
μg/m³
16.3
NO2
μg/m³
41.1
O3
μg/m³
15
SO2
μg/m³
1.7
Weather
  • ℃
  • ℉
7℃
83%
2 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (China)
  • Pollen
  • PM10
  • PM2.5
  • NO2
  • O3
  • SO2
Places included
Airport Township
AQI 37
Bonhomme Township
AQI 24
Chesterfield Township
AQI 21
Clayton Township
AQI 33
Concord Township
AQI 23
Creve Coeur Township
AQI 37
Ferguson Township
AQI 37
Gravois Township
AQI 26
Hadley Township
AQI 37
Jefferson Township
AQI 32
Lemay Township
AQI 24
Lewis and Clark Township
AQI 37
Maryland Heights Township
AQI 37
Meramec Township
AQI 19
Midland Township
AQI 37
Missouri River Township
AQI 26
Normandy Township
AQI 37
Northwest Township
AQI 37
Norwood Township
AQI 30
Oakville Township
AQI 19
Queeny Township
AQI 19
Spanish Lake Township
AQI 22
St. Ferdinand Township
AQI 23
Tesson Ferry Township
AQI 19
University Township
AQI 37
Wildhorse Township
AQI 19
Data Sources
http://www.airnow.gov/

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Warson Woods
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Kirkwood
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Frontenac
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Glendale
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Country Life Acres
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Oakland
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Westwood
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