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)
27
Good
Northbrook, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.13 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.65 μg/m³
0
55
155
255
425
605+
25.79 ppb
0
55
71
86
201
201+
1.45 ppb
0
36
76
186
605
1005+
9.15 ppb
0
54
101
361
1250
2050+
0.28 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Northbrook, Illinois
Northbrook, Illinois
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AQI 33
Good
5.71μg/m³
PM2.5
20.60μg/m³
PM10
24.91ppb
O3
1.47ppb
SO2
9.35ppb
NO2
0.28ppm
CO
AQI 38
Good
6.57μg/m³
PM2.5
27.75μg/m³
PM10
22.58ppb
O3
1.48ppb
SO2
9.62ppb
NO2
0.28ppm
CO
AQI 27
Good
4.98μg/m³
PM2.5
15.37μg/m³
PM10
26.21ppb
O3
1.45ppb
SO2
9.11ppb
NO2
0.28ppm
CO
AQI 33
Good
5.90μg/m³
PM2.5
21.80μg/m³
PM10
24.76ppb
O3
1.48ppb
SO2
9.52ppb
NO2
0.28ppm
CO
AQI 38
Good
6.96μg/m³
PM2.5
29.29μg/m³
PM10
22.91ppb
O3
1.49ppb
SO2
9.72ppb
NO2
0.27ppm
CO
AQI 38
Good
7.35μg/m³
PM2.5
31.71μg/m³
PM10
22.50ppb
O3
1.50ppb
SO2
9.81ppb
NO2
0.27ppm
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 10:00:00 on 2026-01-24.
In the last 24 hours, the best air quality in Northbrook, Illinois was observed at 09:00:00 on 2026-01-24.
As of now, the AQI in Northbrook, Illinois is 27, indicating Good conditions.
Northbrook, Illinois air has the highest levels of PM2.5.
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 5.133 μg/m3.
The PM10 concentration in Northbrook, Illinois is 16.65 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Northbrook, Illinois is 0.278 ppm.
Currently, Northbrook, Illinois has a sulfur dioxide (SO2) concentration of 1.452 ppb.
The current ozone (O3) level in Northbrook, Illinois at the moment is 25.791 ppm.
Nitrogen dioxide (NO2) level in Northbrook, Illinois at the moment is 9.148 ppb.
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