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)
42
Good
Belleville, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.58 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
12.56 μg/m³
0
55
155
255
425
605+
45.05 ppb
0
55
71
86
201
201+
0.50 ppb
0
36
76
186
605
1005+
3.03 ppb
0
54
101
361
1250
2050+
0.11 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Belleville, Illinois
Belleville, Illinois
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AQI 42
Good
2.51μg/m³
PM2.5
17.84μg/m³
PM10
44.51ppb
O3
0.49ppb
SO2
3.02ppb
NO2
0.11ppm
CO
AQI 44
Good
2.88μg/m³
PM2.5
16.29μg/m³
PM10
46.53ppb
O3
0.48ppb
SO2
3.05ppb
NO2
0.11ppm
CO
AQI 44
Good
3.19μg/m³
PM2.5
17.26μg/m³
PM10
47.39ppb
O3
0.48ppb
SO2
3.10ppb
NO2
0.12ppm
CO
AQI 44
Good
3.19μg/m³
PM2.5
17.26μg/m³
PM10
47.39ppb
O3
0.48ppb
SO2
3.10ppb
NO2
0.12ppm
CO
AQI 46
Good
3.47μg/m³
PM2.5
14.40μg/m³
PM10
50.33ppb
O3
0.46ppb
SO2
3.15ppb
NO2
0.11ppm
CO
AQI 44
Good
3.10μg/m³
PM2.5
14.12μg/m³
PM10
47.02ppb
O3
0.46ppb
SO2
2.86ppb
NO2
0.10ppm
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 10:00:00 on 2026-06-11.
In the last 24 hours, the best air quality in Belleville, Illinois was observed at 03:00:00 on 2026-06-12.
As of now, the AQI in Belleville, Illinois is 42, 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 2.58 μg/m3.
The PM10 concentration in Belleville, Illinois is 12.564 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Belleville, Illinois is 0.114 ppm.
Currently, Belleville, Illinois has a sulfur dioxide (SO2) concentration of 0.504 ppb.
The current ozone (O3) level in Belleville, Illinois at the moment is 45.049 ppm.
Nitrogen dioxide (NO2) level in Belleville, Illinois at the moment is 3.032 ppb.
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