Stay updated with real-time air quality in Belleville, Illinois 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)
27
Good
Belleville, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.92 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
18.45 μg/m³
0
55
155
255
425
605+
29.28 ppb
0
55
71
86
201
201+
0.74 ppb
0
36
76
186
605
1005+
4.31 ppb
0
54
101
361
1250
2050+
0.16 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Belleville, Illinois
Belleville, Illinois
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AQI 28
Good
5.38μg/m³
PM2.5
18.37μg/m³
PM10
30.05ppb
O3
0.72ppb
SO2
4.31ppb
NO2
0.16ppm
CO
AQI 33
Good
6.42μg/m³
PM2.5
18.36μg/m³
PM10
30.00ppb
O3
0.71ppb
SO2
4.32ppb
NO2
0.16ppm
CO
AQI 24
Good
3.95μg/m³
PM2.5
18.66μg/m³
PM10
26.41ppb
O3
0.68ppb
SO2
4.32ppb
NO2
0.16ppm
CO
AQI 24
Good
3.95μg/m³
PM2.5
18.66μg/m³
PM10
26.41ppb
O3
0.68ppb
SO2
4.32ppb
NO2
0.16ppm
CO
AQI 38
Good
7.33μg/m³
PM2.5
19.64μg/m³
PM10
28.33ppb
O3
0.70ppb
SO2
4.36ppb
NO2
0.16ppm
CO
AQI 33
Good
5.98μg/m³
PM2.5
26.82μg/m³
PM10
26.08ppb
O3
0.64ppb
SO2
4.37ppb
NO2
0.17ppm
CO
Air quality and pollutant data for Illinois, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Belleville, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Belleville, Illinois was at its worst at 04:00:00 on 2026-09-06.
In the last 24 hours, the best air quality in Belleville, Illinois was observed at 10:00:00 on 2026-09-07.
As of now, the AQI in Belleville, Illinois is 27, indicating Good conditions.
Belleville, Illinois air has the highest levels of O3.
Poor air quality in Belleville, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Belleville, Illinois are currently 3.92 μg/m3.
The PM10 concentration in Belleville, Illinois is 18.453 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Belleville, Illinois is 0.159 ppm.
Currently, Belleville, Illinois has a sulfur dioxide (SO2) concentration of 0.74 ppb.
The current ozone (O3) level in Belleville, Illinois at the moment is 29.278 ppm.
Nitrogen dioxide (NO2) level in Belleville, Illinois at the moment is 4.309 ppb.
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