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)
49
Good
Lake Forest, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
9.21 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
25.87 μg/m³
0
55
155
255
425
605+
26.67 ppb
0
55
71
86
201
201+
0.33 ppb
0
36
76
186
605
1005+
3.84 ppb
0
54
101
361
1250
2050+
0.35 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Lake Forest, Illinois
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AQI 27
Good
4.92μg/m³
PM2.5
20.50μg/m³
PM10
28.94ppb
O3
0.45ppb
SO2
6.81ppb
NO2
0.14ppm
CO
AQI 23
Good
3.71μg/m³
PM2.5
9.97μg/m³
PM10
25.37ppb
O3
0.51ppb
SO2
8.74ppb
NO2
0.13ppm
CO
AQI 27
Good
5.09μg/m³
PM2.5
21.52μg/m³
PM10
27.21ppb
O3
0.45ppb
SO2
6.85ppb
NO2
0.12ppm
CO
AQI 22
Good
4.46μg/m³
PM2.5
14.69μg/m³
PM10
23.93ppb
O3
0.51ppb
SO2
8.84ppb
NO2
0.13ppm
CO
AQI 28
Good
4.95μg/m³
PM2.5
20.68μg/m³
PM10
29.70ppb
O3
0.47ppb
SO2
6.64ppb
NO2
0.12ppm
CO
AQI 28
Good
4.92μg/m³
PM2.5
20.56μg/m³
PM10
30.28ppb
O3
0.45ppb
SO2
6.94ppb
NO2
0.14ppm
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 09:00:00 on 2025-07-24.
The best air quality in Lake Forest, Illinois was recorded at 06:00:00 on 2025-07-25.
The real-time air quality index in Lake Forest, Illinois is 22, 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 4.489 μg/m3.
The current PM10 levels in Lake Forest, Illinois are 16.948 μg/m3.
The current carbon monoxide (CO) level in Lake Forest, Illinois is 0.127 ppm.
The current sulfur dioxide (SO2) levels in Lake Forest, Illinois are 0.499 ppb.
The current ozone (O3) levels at Lake Forest, Illinois is 20.743 ppm.
The current nitrogen dioxide (NO2) levels at Lake Forest, Illinois is 8.042 ppb.
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