Stay updated with real-time air quality in Westmont, 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)
46
Good
Westmont, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.61 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.16 μg/m³
0
55
155
255
425
605+
50.29 ppb
0
55
71
86
201
201+
0.45 ppb
0
36
76
186
605
1005+
5.16 ppb
0
54
101
361
1250
2050+
0.14 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Westmont, Illinois
Westmont, Illinois
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AQI 41
Good
3.85μg/m³
PM2.5
16.77μg/m³
PM10
43.74ppb
O3
0.41ppb
SO2
3.63ppb
NO2
0.16ppm
CO
AQI 38
Good
3.62μg/m³
PM2.5
15.98μg/m³
PM10
41.25ppb
O3
0.40ppb
SO2
3.29ppb
NO2
0.16ppm
CO
AQI 42
Good
3.53μg/m³
PM2.5
14.86μg/m³
PM10
45.43ppb
O3
0.40ppb
SO2
3.37ppb
NO2
0.16ppm
CO
AQI 41
Good
3.90μg/m³
PM2.5
17.16μg/m³
PM10
44.00ppb
O3
0.42ppb
SO2
3.75ppb
NO2
0.17ppm
CO
AQI 42
Good
3.64μg/m³
PM2.5
15.50μg/m³
PM10
45.30ppb
O3
0.41ppb
SO2
3.57ppb
NO2
0.16ppm
CO
AQI 35
Good
3.67μg/m³
PM2.5
16.47μg/m³
PM10
38.00ppb
O3
0.39ppb
SO2
3.20ppb
NO2
0.16ppm
CO
Air quality data and pollutant measurements for Illinois, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Westmont, Illinois is updated every hour.
The worst air quality in Westmont, Illinois in the last 24 hours was observed at 10:00:00 on 2026-06-11.
In the last 24 hrs, the best air quality in Westmont, Illinois was observed at 02:00:00 on 2026-06-11.
The current air quality in Westmont, Illinois is 46, categorized as Good based on real-time data.
The most common pollutant in Westmont, Illinois is O3.
If the air quality in Westmont, Illinois is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Westmont, Illinois is 3.61 μg/m3.
The current PM10 concentration at Westmont, Illinois is 15.159 μg/m3.
The current carbon monoxide (CO) concentration at Westmont, Illinois is 0.145 ppm.
The current sulfur dioxide (SO2) concentration at Westmont, Illinois is 0.453 ppb.
The current ozone (O3) concentration at Westmont, Illinois is 50.291 ppm.
The current nitrogen dioxide (NO2) concentration at Westmont, Illinois is 5.157 ppb.
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