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
7.60 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
35.91 μg/m³
0
55
155
255
425
605+
20.03 ppb
0
55
71
86
201
201+
0.46 ppb
0
36
76
186
605
1005+
4.46 ppb
0
54
101
361
1250
2050+
0.18 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Westmont, Illinois
Westmont, Illinois
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AQI 56
Moderate
12.18μg/m³
PM2.5
53.87μg/m³
PM10
18.40ppb
O3
0.44ppb
SO2
4.42ppb
NO2
0.18ppm
CO
AQI 44
Good
7.66μg/m³
PM2.5
35.50μg/m³
PM10
21.30ppb
O3
0.45ppb
SO2
4.40ppb
NO2
0.18ppm
CO
AQI 52
Moderate
9.59μg/m³
PM2.5
42.59μg/m³
PM10
18.50ppb
O3
0.45ppb
SO2
4.43ppb
NO2
0.18ppm
CO
AQI 60
Moderate
13.72μg/m³
PM2.5
60.30μg/m³
PM10
18.39ppb
O3
0.43ppb
SO2
4.41ppb
NO2
0.18ppm
CO
AQI 54
Moderate
11.14μg/m³
PM2.5
49.16μg/m³
PM10
18.29ppb
O3
0.45ppb
SO2
4.43ppb
NO2
0.18ppm
CO
AQI 33
Good
6.25μg/m³
PM2.5
30.30μg/m³
PM10
22.00ppb
O3
0.46ppb
SO2
4.38ppb
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 07:00:00 on 2026-04-27.
In the last 24 hrs, the best air quality in Westmont, Illinois was observed at 03:00:00 on 2026-04-27.
The current air quality in Westmont, Illinois is 44, categorized as Good 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 7.598 μg/m3.
The current PM10 concentration at Westmont, Illinois is 35.912 μg/m3.
The current carbon monoxide (CO) concentration at Westmont, Illinois is 0.18 ppm.
The current sulfur dioxide (SO2) concentration at Westmont, Illinois is 0.456 ppb.
The current ozone (O3) concentration at Westmont, Illinois is 20.029 ppm.
The current nitrogen dioxide (NO2) concentration at Westmont, Illinois is 4.461 ppb.
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