Stay updated with real-time air quality in Illinois, USA featuring accurate data on AQI, PM2.5, PM10, O3, NO2, SO2, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.
Live AQI (Air Quality Index)
33
Good
Illinois, USA
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.87 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
24.33 μg/m³
0
55
155
255
425
605+
18.71 ppb
0
55
71
86
201
201+
1.59 ppb
0
36
76
186
605
1005+
6.09 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Illinois, USA
Illinois, USA
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| City | AQI | PM2.5 | PM10 | O3 | SO2 | NO2 | CO |
|---|---|---|---|---|---|---|---|
AQI 33
Good
6.49μg/m³
PM2.5
25.13μg/m³
PM10
19.29ppb
O3
0.92ppb
SO2
5.14ppb
NO2
0.23ppm
CO
AQI 38
Good
6.59μg/m³
PM2.5
29.13μg/m³
PM10
20.21ppb
O3
0.63ppb
SO2
3.57ppb
NO2
0.21ppm
CO
AQI 33
Good
5.94μg/m³
PM2.5
20.72μg/m³
PM10
14.52ppb
O3
0.63ppb
SO2
8.04ppb
NO2
0.26ppm
CO
AQI 27
Good
4.67μg/m³
PM2.5
20.95μg/m³
PM10
28.81ppb
O3
0.85ppb
SO2
3.65ppb
NO2
0.16ppm
CO
AQI 38
Good
6.66μg/m³
PM2.5
24.84μg/m³
PM10
7.91ppb
O3
0.46ppb
SO2
6.73ppb
NO2
0.29ppm
CO
AQI 33
Good
5.53μg/m³
PM2.5
21.48μg/m³
PM10
23.66ppb
O3
1.07ppb
SO2
5.00ppb
NO2
0.24ppm
CO
The air quality data for Illinois, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for Illinois, USA are available every hour.
Illinois, USA experienced its worst air quality at 03:00:00, 2026-09-07.
The best air quality in Illinois, USA was observed at 07:00:00 on 2026-09-07.
The air quality in Illinois, USA right now is Good, with an AQI of 33.
In Illinois, USA, PM2.5 is the most frequently found pollutant.
When air quality in Illinois, USA is compromised, staying indoors and wearing a mask can reduce health risks.
Illinois, USA currently has a PM2.5 concentration of 5.868 μg/m3.
Illinois, USA currently has a PM10 concentration of 24.326 μg/m3.
The current carbon monoxide (CO) level in Illinois, USA is 0.212 ppm.
The current sulfur dioxide (SO2) concentration in Illinois, USA is 1.591 ppb.
Illinois, USA currently has an ozone (O3) concentration of 18.708 ppm.
The current level of nitrogen dioxide (NO2) in Illinois, USA is 6.088 ppb.
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