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  4. St. Louis County

St. Louis County

Missouri

2026-08-23 12:00
CAQI (Europe)
Very Low
Pollutants|Pollens
PM10
μg/m³
22.6
PM2.5
μg/m³
8.8
O3
μg/m³
21.4
NO2
μg/m³
16.4
SO2
μg/m³
1.4
Weather
  • ℃
  • ℉
21℃
81%
4 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • CAQI (Europe)
  • Pollen
  • PM10
  • PM2.5
  • O3
  • NO2
  • SO2
Places included
Airport Township
AQI 27
Bonhomme Township
AQI 18
Chesterfield Township
AQI 18
Clayton Township
AQI 26
Concord Township
AQI 18
Creve Coeur Township
AQI 27
Ferguson Township
AQI 27
Gravois Township
AQI 21
Hadley Township
AQI 27
Jefferson Township
AQI 25
Lemay Township
AQI 20
Lewis and Clark Township
AQI 27
Maryland Heights Township
AQI 27
Meramec Township
AQI 18
Midland Township
AQI 27
Missouri River Township
AQI 21
Normandy Township
AQI 27
Northwest Township
AQI 27
Norwood Township
AQI 24
Oakville Township
AQI 18
Queeny Township
AQI 18
Spanish Lake Township
AQI 20
St. Ferdinand Township
AQI 20
Tesson Ferry Township
AQI 18
University Township
AQI 27
Wildhorse Township
AQI 18
Data Sources
http://www.airnow.gov/

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Des Peres
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Crystal Lake Park
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Warson Woods
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Rock Hill
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Kirkwood
AQI 18
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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