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)
39
Good
Lake Forest, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
4.65 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
19.64 μg/m³
0
55
155
255
425
605+
42.37 ppb
0
55
71
86
201
201+
0.94 ppb
0
36
76
186
605
1005+
4.09 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Lake Forest, Illinois
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AQI 34
Good
4.66μg/m³
PM2.5
19.51μg/m³
PM10
37.21ppb
O3
0.72ppb
SO2
6.93ppb
NO2
0.23ppm
CO
AQI 31
Good
3.94μg/m³
PM2.5
14.60μg/m³
PM10
34.10ppb
O3
0.72ppb
SO2
6.64ppb
NO2
0.22ppm
CO
AQI 33
Good
4.74μg/m³
PM2.5
21.78μg/m³
PM10
35.85ppb
O3
0.72ppb
SO2
6.91ppb
NO2
0.23ppm
CO
AQI 31
Good
4.20μg/m³
PM2.5
16.49μg/m³
PM10
33.97ppb
O3
0.72ppb
SO2
6.63ppb
NO2
0.22ppm
CO
AQI 32
Good
4.57μg/m³
PM2.5
18.89μg/m³
PM10
35.04ppb
O3
0.71ppb
SO2
6.81ppb
NO2
0.23ppm
CO
AQI 33
Good
4.63μg/m³
PM2.5
20.64μg/m³
PM10
35.66ppb
O3
0.72ppb
SO2
6.89ppb
NO2
0.23ppm
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 06:00:00 on 2025-09-09.
The best air quality in Lake Forest, Illinois was recorded at 06:00:00 on 2025-09-09.
The real-time air quality index in Lake Forest, Illinois is 39, currently categorized as Good.
The most common pollutant in Lake Forest, Illinois is O3.
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 4.648 μg/m3.
The current PM10 levels in Lake Forest, Illinois are 19.643 μg/m3.
The current carbon monoxide (CO) level in Lake Forest, Illinois is 0.201 ppm.
The current sulfur dioxide (SO2) levels in Lake Forest, Illinois are 0.936 ppb.
The current ozone (O3) levels at Lake Forest, Illinois is 42.365 ppm.
The current nitrogen dioxide (NO2) levels at Lake Forest, Illinois is 4.086 ppb.
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