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)
44
Good
Westmont, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.94 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
28.06 μg/m³
0
55
155
255
425
605+
20.40 ppb
0
55
71
86
201
201+
0.63 ppb
0
36
76
186
605
1005+
7.75 ppb
0
54
101
361
1250
2050+
0.15 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Westmont, Illinois
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AQI 38
Good
7.11μg/m³
PM2.5
31.57μg/m³
PM10
19.29ppb
O3
0.41ppb
SO2
8.92ppb
NO2
0.17ppm
CO
AQI 38
Good
7.34μg/m³
PM2.5
30.79μg/m³
PM10
20.14ppb
O3
0.40ppb
SO2
7.98ppb
NO2
0.18ppm
CO
AQI 38
Good
7.04μg/m³
PM2.5
33.16μg/m³
PM10
18.93ppb
O3
0.41ppb
SO2
8.78ppb
NO2
0.17ppm
CO
AQI 38
Good
6.88μg/m³
PM2.5
30.34μg/m³
PM10
18.25ppb
O3
0.42ppb
SO2
8.88ppb
NO2
0.17ppm
CO
AQI 38
Good
7.15μg/m³
PM2.5
33.18μg/m³
PM10
18.57ppb
O3
0.42ppb
SO2
8.79ppb
NO2
0.17ppm
CO
AQI 44
Good
7.89μg/m³
PM2.5
31.18μg/m³
PM10
21.00ppb
O3
0.39ppb
SO2
7.30ppb
NO2
0.18ppm
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 12:00:00 on 2026-03-11.
In the last 24 hrs, the best air quality in Westmont, Illinois was observed at 05:00:00 on 2026-03-11.
The current air quality in Westmont, Illinois is 52, categorized as Moderate based on real-time data.
The most common pollutant in Westmont, Illinois is PM2.5.
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 9.567 μg/m3.
The current PM10 concentration at Westmont, Illinois is 49.272 μg/m3.
The current carbon monoxide (CO) concentration at Westmont, Illinois is 0.166 ppm.
The current sulfur dioxide (SO2) concentration at Westmont, Illinois is 0.449 ppb.
The current ozone (O3) concentration at Westmont, Illinois is 22.86 ppm.
The current nitrogen dioxide (NO2) concentration at Westmont, Illinois is 9.067 ppb.
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