Illinois Air Quality Index (AQI) | Air Pollution
Real-time PM2.5, PM10 air pollution level in Illinois
Check the air quality level of thecities in Illinois
Illinois
Illinois's Cities
Real-time Air Pollution Level
United States's Metro Cities
Air Quality Index
Most Polluted Cities 2026
United States
Analyze the real-time most air polluted cities in the country.
Standard Value
1.
Appleton, Wisconsin
Severe
13xabove Standard
2.
Green Bay, Wisconsin
Severe
12xabove Standard
3.
Baraboo, Wisconsin
Severe
11xabove Standard
4.
Rhinelander, Wisconsin
Severe
10xabove Standard
5.
Madison, Wisconsin
Severe
10xabove Standard
6.
Waukesha, Wisconsin
Unhealthy
8xabove Standard
7.
Ashland, Wisconsin
Unhealthy
8xabove Standard
8.
Rockford, Illinois
Unhealthy
8xabove Standard
9.
Clinton, Iowa
Unhealthy
6xabove Standard
10.
Shorewood, Wisconsin
Unhealthy
6xabove Standard
Last Updated: 19 Jul 2026, 01:13 PM
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