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)
58
Moderate
Illinois, USA
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
13.35 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
54.24 μg/m³
0
55
155
255
425
605+
18.37 ppb
0
55
71
86
201
201+
0.40 ppb
0
36
76
186
605
1005+
8.20 ppb
0
54
101
361
1250
2050+
0.17 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 67
Moderate
18.30μg/m³
PM2.5
69.93μg/m³
PM10
16.67ppb
O3
0.60ppb
SO2
12.78ppb
NO2
0.27ppm
CO
AQI 49
Good
9.16μg/m³
PM2.5
39.26μg/m³
PM10
18.27ppb
O3
0.22ppb
SO2
5.21ppb
NO2
0.24ppm
CO
AQI 52
Moderate
9.82μg/m³
PM2.5
35.50μg/m³
PM10
21.37ppb
O3
0.68ppb
SO2
9.27ppb
NO2
0.24ppm
CO
AQI 58
Moderate
12.88μg/m³
PM2.5
49.00μg/m³
PM10
17.62ppb
O3
0.69ppb
SO2
7.68ppb
NO2
0.26ppm
CO
AQI 54
Moderate
10.92μg/m³
PM2.5
43.89μg/m³
PM10
21.68ppb
O3
0.72ppb
SO2
8.67ppb
NO2
0.21ppm
CO
AQI 73
Moderate
20.83μg/m³
PM2.5
74.28μg/m³
PM10
9.72ppb
O3
0.81ppb
SO2
13.00ppb
NO2
0.35ppm
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 07:00:00, 2025-12-07.
The best air quality in Illinois, USA was observed at 09:00:00 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 13.543 μg/m3.
Illinois, USA currently has a PM10 concentration of 57.372 μg/m3.
The current carbon monoxide (CO) level in Illinois, USA is 0.22 ppm.
The current sulfur dioxide (SO2) concentration in Illinois, USA is 0.437 ppb.
Illinois, USA currently has an ozone (O3) concentration of 18.304 ppm.
The current level of nitrogen dioxide (NO2) in Illinois, USA is 10.085 ppb.
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