Air quality in Illinois

Air quality index (AQI) and PM2.5 air pollution in Illinois

Last update at (local time)

LIVE AQI CITY RANKING

Real-time Illinois
Most polluted city ranking

#cityUS AQI
1 Willowbrook

102

2 Coal City

94

3 Oak Park

94

4 Wheaton

93

5 Naperville

86

6 River Forest

86

7 Chicago

84

8 Centralia

81

9 Cicero

81

10 Peotone

80

(local time)

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LIVE AQI CITY RANKING

Real-time Illinois
Cleanest city ranking

#cityUS AQI
1 Charleston

8

2 Elk Grove Village

15

3 Round Lake Heights

21

4 Quincy

32

5 McLeansboro

41

6 Hartford

42

7 La Salle

43

8 Park City

43

9 Wood River

46

10 Cary

47

(local time)

SEE WORLD AQI RANKING

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Illinois air quality data attribution

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