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)
21
Good
Belleville, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
2.48 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.38 μg/m³
0
55
155
255
425
605+
23.10 ppb
0
55
71
86
201
201+
0.54 ppb
0
36
76
186
605
1005+
3.72 ppb
0
54
101
361
1250
2050+
0.15 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Belleville, Illinois
Belleville, Illinois
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AQI 21
Good
2.59μg/m³
PM2.5
14.16μg/m³
PM10
23.23ppb
O3
0.49ppb
SO2
3.70ppb
NO2
0.16ppm
CO
AQI 21
Good
2.63μg/m³
PM2.5
13.59μg/m³
PM10
23.13ppb
O3
0.48ppb
SO2
3.67ppb
NO2
0.16ppm
CO
AQI 21
Good
2.46μg/m³
PM2.5
14.84μg/m³
PM10
22.99ppb
O3
0.55ppb
SO2
3.69ppb
NO2
0.15ppm
CO
AQI 21
Good
2.46μg/m³
PM2.5
14.84μg/m³
PM10
22.99ppb
O3
0.55ppb
SO2
3.69ppb
NO2
0.15ppm
CO
AQI 22
Good
2.68μg/m³
PM2.5
17.39μg/m³
PM10
24.28ppb
O3
0.48ppb
SO2
3.56ppb
NO2
0.16ppm
CO
AQI 21
Good
3.28μg/m³
PM2.5
15.19μg/m³
PM10
22.80ppb
O3
0.36ppb
SO2
3.40ppb
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 12:00:00 on 2025-10-22.
In the last 24 hours, the best air quality in Belleville, Illinois was observed at 10:00:00 on 2025-10-22.
As of now, the AQI in Belleville, Illinois is 21, 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 2.477 μg/m3.
The PM10 concentration in Belleville, Illinois is 14.381 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Belleville, Illinois is 0.155 ppm.
Currently, Belleville, Illinois has a sulfur dioxide (SO2) concentration of 0.537 ppb.
The current ozone (O3) level in Belleville, Illinois at the moment is 23.102 ppm.
Nitrogen dioxide (NO2) level in Belleville, Illinois at the moment is 3.721 ppb.
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