Stay updated with real-time air quality in Lemont, 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)
22
Good
Lemont, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
4.38 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
19.26 μg/m³
0
55
155
255
425
605+
17.00 ppb
0
55
71
86
201
201+
0.77 ppb
0
36
76
186
605
1005+
7.49 ppb
0
54
101
361
1250
2050+
0.13 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Lemont, Illinois
Lemont, Illinois
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AQI 16
Good
3.49μg/m³
PM2.5
14.98μg/m³
PM10
17.17ppb
O3
1.81ppb
SO2
5.61ppb
NO2
0.17ppm
CO
AQI 22
Good
3.64μg/m³
PM2.5
15.77μg/m³
PM10
16.88ppb
O3
1.80ppb
SO2
5.60ppb
NO2
0.17ppm
CO
AQI 16
Good
3.42μg/m³
PM2.5
14.73μg/m³
PM10
17.06ppb
O3
1.84ppb
SO2
6.29ppb
NO2
0.17ppm
CO
AQI 16
Good
3.25μg/m³
PM2.5
12.84μg/m³
PM10
16.11ppb
O3
1.80ppb
SO2
5.77ppb
NO2
0.16ppm
CO
AQI 22
Good
3.68μg/m³
PM2.5
16.55μg/m³
PM10
17.59ppb
O3
1.86ppb
SO2
6.38ppb
NO2
0.18ppm
CO
AQI 22
Good
3.84μg/m³
PM2.5
16.67μg/m³
PM10
16.62ppb
O3
1.80ppb
SO2
5.60ppb
NO2
0.17ppm
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 Lemont, Illinois is updated every hour.
The worst air quality in Lemont, Illinois in the last 24 hours was observed at 03:00:00 on 2025-08-30.
In the last 24 hrs, the best air quality in Lemont, Illinois was observed at 12:00:00 on 2025-08-29.
The current air quality in Lemont, Illinois is 22, categorized as Good based on real-time data.
The most common pollutant in Lemont, Illinois is PM2.5.
If the air quality in Lemont, Illinois is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Lemont, Illinois is 3.632 μg/m3.
The current PM10 concentration at Lemont, Illinois is 16.515 μg/m3.
The current carbon monoxide (CO) concentration at Lemont, Illinois is 0.172 ppm.
The current sulfur dioxide (SO2) concentration at Lemont, Illinois is 1.832 ppb.
The current ozone (O3) concentration at Lemont, Illinois is 19 ppm.
The current nitrogen dioxide (NO2) concentration at Lemont, Illinois is 5.62 ppb.
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