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  4. St. Clair County

St. Clair County

Illinois

2026-04-30 18:00
AQI (US)
Good
Pollutants|Pollens
O3
μg/m³
109.3
PM10
μg/m³
41.7
PM2.5
μg/m³
4.8
Weather
  • ℃
  • ℉
18℃
41%
3 kph
7 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • O3
  • PM10
  • PM2.5
Places included
Belleville
AQI 51
Canteen Township
AQI 34
Caseyville Township
AQI 34
Centreville Township
AQI 51
East St. Louis Township
AQI 51
Fayetteville Township
AQI 20
Freeburg Township
AQI 20
Lebanon Township
AQI 45
Lenzburg Township
AQI 20
Marissa Township
AQI 20
Mascoutah Township
AQI 45
Millstadt Township
AQI 51
New Athens Township
AQI 20
O'Fallon Township
AQI 34
Shiloh Valley Township
AQI 34
Smithton Township
AQI 34
St. Clair Township
AQI 51
Stites Township
AQI 51
Sugar Loaf Township
AQI 23
Data Sources
http://www.airnow.gov/

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Cities Nearby

Smithton
AQI 34
New Athens
AQI 20
Fayetteville
AQI 20
Hecker
AQI 20
Belleville
AQI 51
Mascoutah
AQI 44
Lenzburg
AQI 20
Swansea
AQI 51
Millstadt
AQI 51
Saint Libory
AQI 20
Waterloo
AQI 8