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)
49
Good
Belleville, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
9.32 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
36.49 μg/m³
0
55
155
255
425
605+
9.71 ppb
0
55
71
86
201
201+
1.00 ppb
0
36
76
186
605
1005+
32.48 ppb
0
54
101
361
1250
2050+
0.51 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Belleville, Illinois
Belleville, Illinois
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AQI 49
Good
8.89μg/m³
PM2.5
35.40μg/m³
PM10
9.60ppb
O3
0.94ppb
SO2
33.87ppb
NO2
0.53ppm
CO
AQI 49
Good
8.98μg/m³
PM2.5
49.74μg/m³
PM10
9.65ppb
O3
0.84ppb
SO2
34.47ppb
NO2
0.53ppm
CO
AQI 50
Good
8.93μg/m³
PM2.5
54.32μg/m³
PM10
9.45ppb
O3
0.87ppb
SO2
33.39ppb
NO2
0.51ppm
CO
AQI 50
Good
8.93μg/m³
PM2.5
54.32μg/m³
PM10
9.45ppb
O3
0.87ppb
SO2
33.39ppb
NO2
0.51ppm
CO
AQI 49
Good
8.70μg/m³
PM2.5
30.95μg/m³
PM10
10.41ppb
O3
0.83ppb
SO2
33.93ppb
NO2
0.53ppm
CO
AQI 38
Good
7.35μg/m³
PM2.5
32.46μg/m³
PM10
10.25ppb
O3
0.74ppb
SO2
34.89ppb
NO2
0.56ppm
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 2026-01-23.
In the last 24 hours, the best air quality in Belleville, Illinois was observed at 01:00:00 on 2026-01-22.
As of now, the AQI in Belleville, Illinois is 49, indicating Good conditions.
Belleville, Illinois air has the highest levels of PM2.5.
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 9.321 μg/m3.
The PM10 concentration in Belleville, Illinois is 36.49 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Belleville, Illinois is 0.513 ppm.
Currently, Belleville, Illinois has a sulfur dioxide (SO2) concentration of 0.997 ppb.
The current ozone (O3) level in Belleville, Illinois at the moment is 9.715 ppm.
Nitrogen dioxide (NO2) level in Belleville, Illinois at the moment is 32.48 ppb.
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