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)
50
Good
Belleville, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.51 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
39.07 μg/m³
0
55
155
255
425
605+
54.35 ppb
0
55
71
86
201
201+
1.82 ppb
0
36
76
186
605
1005+
5.18 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Belleville, Illinois
Belleville, Illinois
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AQI 51
Moderate
7.63μg/m³
PM2.5
31.53μg/m³
PM10
54.52ppb
O3
1.89ppb
SO2
5.26ppb
NO2
0.20ppm
CO
AQI 54
Moderate
7.68μg/m³
PM2.5
31.49μg/m³
PM10
56.17ppb
O3
1.90ppb
SO2
5.26ppb
NO2
0.20ppm
CO
AQI 51
Moderate
7.03μg/m³
PM2.5
36.11μg/m³
PM10
55.02ppb
O3
1.75ppb
SO2
5.07ppb
NO2
0.19ppm
CO
AQI 51
Moderate
7.03μg/m³
PM2.5
36.11μg/m³
PM10
55.02ppb
O3
1.75ppb
SO2
5.07ppb
NO2
0.19ppm
CO
AQI 54
Moderate
8.07μg/m³
PM2.5
45.51μg/m³
PM10
55.89ppb
O3
1.97ppb
SO2
5.56ppb
NO2
0.20ppm
CO
AQI 52
Moderate
10.03μg/m³
PM2.5
45.24μg/m³
PM10
48.14ppb
O3
2.29ppb
SO2
7.28ppb
NO2
0.20ppm
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 2026-10-22.
In the last 24 hours, the best air quality in Belleville, Illinois was observed at 06:00:00 on 2026-10-22.
As of now, the AQI in Belleville, Illinois is 50, 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 7.509 μg/m3.
The PM10 concentration in Belleville, Illinois is 39.072 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Belleville, Illinois is 0.194 ppm.
Currently, Belleville, Illinois has a sulfur dioxide (SO2) concentration of 1.823 ppb.
The current ozone (O3) level in Belleville, Illinois at the moment is 54.355 ppm.
Nitrogen dioxide (NO2) level in Belleville, Illinois at the moment is 5.184 ppb.
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