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  4. St. Clair County

St. Clair County

Illinois

2026-09-27 19:00
AQI (US)
Good
Pollutants|Pollens
O3
μg/m³
87.9
PM2.5
μg/m³
4.4
PM10
μg/m³
20.5
Weather
  • ℃
  • ℉
24℃
51%
2 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • O3
  • PM2.5
  • PM10
Places included
Belleville
AQI 28
Canteen Township
AQI 28
Caseyville Township
AQI 28
Centreville Township
AQI 28
East St. Louis Township
AQI 38
Fayetteville Township
AQI 22
Freeburg Township
AQI 22
Lebanon Township
AQI 38
Lenzburg Township
AQI 22
Marissa Township
AQI 22
Mascoutah Township
AQI 38
Millstadt Township
AQI 22
New Athens Township
AQI 22
O'Fallon Township
AQI 28
Shiloh Valley Township
AQI 28
Smithton Township
AQI 28
St. Clair Township
AQI 28
Stites Township
AQI 26
Sugar Loaf Township
AQI 19
Data Sources
http://www.airnow.gov/

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Cities Nearby

Smithton
AQI 28
New Athens
AQI 22
Fayetteville
AQI 22
Hecker
AQI 22
Belleville
AQI 28
Mascoutah
AQI 39
Lenzburg
AQI 22
Swansea
AQI 28
Millstadt
AQI 22
Saint Libory
AQI 22
Waterloo
AQI 19