Stay updated with real-time air quality in Lake Forest, 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)
38
Good
Lake Forest, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.48 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
22.37 μg/m³
0
55
155
255
425
605+
19.04 ppb
0
55
71
86
201
201+
0.44 ppb
0
36
76
186
605
1005+
6.80 ppb
0
54
101
361
1250
2050+
0.17 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Lake Forest, Illinois
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AQI 33
Good
6.29μg/m³
PM2.5
26.68μg/m³
PM10
19.79ppb
O3
0.50ppb
SO2
7.18ppb
NO2
0.17ppm
CO
AQI 38
Good
6.98μg/m³
PM2.5
14.09μg/m³
PM10
18.33ppb
O3
0.43ppb
SO2
6.79ppb
NO2
0.17ppm
CO
AQI 33
Good
6.20μg/m³
PM2.5
27.16μg/m³
PM10
18.86ppb
O3
0.49ppb
SO2
7.17ppb
NO2
0.17ppm
CO
AQI 38
Good
7.46μg/m³
PM2.5
20.77μg/m³
PM10
18.79ppb
O3
0.43ppb
SO2
6.75ppb
NO2
0.17ppm
CO
AQI 33
Good
6.22μg/m³
PM2.5
30.43μg/m³
PM10
19.69ppb
O3
0.47ppb
SO2
7.15ppb
NO2
0.17ppm
CO
AQI 33
Good
6.29μg/m³
PM2.5
26.69μg/m³
PM10
19.77ppb
O3
0.50ppb
SO2
7.17ppb
NO2
0.17ppm
CO
Air quality measurements for Illinois, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for Lake Forest, Illinois is updated on an hourly basis.
The worst air quality in Lake Forest, Illinois was recorded at 11:00:00 on 2025-12-09.
The best air quality in Lake Forest, Illinois was recorded at 10:00:00 on 2025-12-10.
The real-time air quality index in Lake Forest, Illinois is 38, currently categorized as Good.
The most common pollutant in Lake Forest, Illinois is PM2.5.
If the air quality in Lake Forest, Illinois is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Lake Forest, Illinois at present are 7.477 μg/m3.
The current PM10 levels in Lake Forest, Illinois are 22.367 μg/m3.
The current carbon monoxide (CO) level in Lake Forest, Illinois is 0.167 ppm.
The current sulfur dioxide (SO2) levels in Lake Forest, Illinois are 0.44 ppb.
The current ozone (O3) levels at Lake Forest, Illinois is 19.043 ppm.
The current nitrogen dioxide (NO2) levels at Lake Forest, Illinois is 6.8 ppb.
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