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)
60
Moderate
Illinois, USA
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
13.71 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
59.51 μg/m³
0
55
155
255
425
605+
18.78 ppb
0
55
71
86
201
201+
0.60 ppb
0
36
76
186
605
1005+
13.73 ppb
0
54
101
361
1250
2050+
0.26 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 66
Moderate
17.49μg/m³
PM2.5
66.41μg/m³
PM10
20.49ppb
O3
0.72ppb
SO2
13.17ppb
NO2
0.28ppm
CO
AQI 44
Good
7.97μg/m³
PM2.5
35.48μg/m³
PM10
19.13ppb
O3
0.26ppb
SO2
5.14ppb
NO2
0.25ppm
CO
AQI 52
Moderate
10.47μg/m³
PM2.5
39.53μg/m³
PM10
20.78ppb
O3
0.78ppb
SO2
10.69ppb
NO2
0.27ppm
CO
AQI 56
Moderate
11.79μg/m³
PM2.5
44.40μg/m³
PM10
20.40ppb
O3
0.73ppb
SO2
7.68ppb
NO2
0.27ppm
CO
AQI 54
Moderate
10.72μg/m³
PM2.5
45.85μg/m³
PM10
22.92ppb
O3
0.60ppb
SO2
11.28ppb
NO2
0.28ppm
CO
AQI 69
Moderate
18.64μg/m³
PM2.5
62.95μg/m³
PM10
16.70ppb
O3
1.15ppb
SO2
11.39ppb
NO2
0.30ppm
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 01:00:00, 2025-12-07.
The best air quality in Illinois, USA was observed at 05:00:00 on 2025-12-06.
The air quality in Illinois, USA right now is Moderate, with an AQI of 60.
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 13.705 μg/m3.
Illinois, USA currently has a PM10 concentration of 59.508 μg/m3.
The current carbon monoxide (CO) level in Illinois, USA is 0.262 ppm.
The current sulfur dioxide (SO2) concentration in Illinois, USA is 0.605 ppb.
Illinois, USA currently has an ozone (O3) concentration of 18.781 ppm.
The current level of nitrogen dioxide (NO2) in Illinois, USA is 13.727 ppb.
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