Stay updated with real-time air quality in Northbrook, 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)
20
Good
Northbrook, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.17 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
4.88 μg/m³
0
55
155
255
425
605+
21.54 ppb
0
55
71
86
201
201+
0.38 ppb
0
36
76
186
605
1005+
6.18 ppb
0
54
101
361
1250
2050+
0.16 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Northbrook, Illinois
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AQI 19
Good
2.38μg/m³
PM2.5
7.05μg/m³
PM10
21.22ppb
O3
0.38ppb
SO2
6.08ppb
NO2
0.16ppm
CO
AQI 19
Good
2.77μg/m³
PM2.5
11.37μg/m³
PM10
19.94ppb
O3
0.36ppb
SO2
5.98ppb
NO2
0.15ppm
CO
AQI 20
Good
2.10μg/m³
PM2.5
4.11μg/m³
PM10
21.73ppb
O3
0.39ppb
SO2
6.17ppb
NO2
0.16ppm
CO
AQI 20
Good
2.54μg/m³
PM2.5
8.91μg/m³
PM10
21.60ppb
O3
0.39ppb
SO2
5.79ppb
NO2
0.16ppm
CO
AQI 19
Good
2.75μg/m³
PM2.5
11.12μg/m³
PM10
19.84ppb
O3
0.36ppb
SO2
5.93ppb
NO2
0.15ppm
CO
AQI 19
Good
2.84μg/m³
PM2.5
12.00μg/m³
PM10
19.60ppb
O3
0.36ppb
SO2
5.89ppb
NO2
0.15ppm
CO
Air quality and pollutant data for Illinois, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Northbrook, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Northbrook, Illinois was at its worst at 11:00:00 on 2026-03-10.
In the last 24 hours, the best air quality in Northbrook, Illinois was observed at 05:00:00 on 2026-03-11.
As of now, the AQI in Northbrook, Illinois is 20, indicating Good conditions.
Northbrook, Illinois air has the highest levels of O3.
Poor air quality in Northbrook, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Northbrook, Illinois are currently 2.171 μg/m3.
The PM10 concentration in Northbrook, Illinois is 4.879 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Northbrook, Illinois is 0.156 ppm.
Currently, Northbrook, Illinois has a sulfur dioxide (SO2) concentration of 0.384 ppb.
The current ozone (O3) level in Northbrook, Illinois at the moment is 21.543 ppm.
Nitrogen dioxide (NO2) level in Northbrook, Illinois at the moment is 6.177 ppb.
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