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)
44
Good
Northbrook, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.55 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
12.20 μg/m³
0
55
155
255
425
605+
48.02 ppb
0
55
71
86
201
201+
0.45 ppb
0
36
76
186
605
1005+
7.73 ppb
0
54
101
361
1250
2050+
0.14 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Northbrook, Illinois
Northbrook, Illinois
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AQI 44
Good
2.58μg/m³
PM2.5
12.44μg/m³
PM10
47.25ppb
O3
0.45ppb
SO2
7.71ppb
NO2
0.14ppm
CO
AQI 43
Good
2.66μg/m³
PM2.5
11.73μg/m³
PM10
45.63ppb
O3
0.45ppb
SO2
7.69ppb
NO2
0.14ppm
CO
AQI 45
Good
2.54μg/m³
PM2.5
12.39μg/m³
PM10
48.57ppb
O3
0.45ppb
SO2
7.73ppb
NO2
0.14ppm
CO
AQI 44
Good
2.64μg/m³
PM2.5
14.38μg/m³
PM10
48.02ppb
O3
0.45ppb
SO2
7.66ppb
NO2
0.14ppm
CO
AQI 42
Good
2.66μg/m³
PM2.5
11.70μg/m³
PM10
45.17ppb
O3
0.45ppb
SO2
7.68ppb
NO2
0.14ppm
CO
AQI 42
Good
2.68μg/m³
PM2.5
11.65μg/m³
PM10
44.58ppb
O3
0.45ppb
SO2
7.67ppb
NO2
0.14ppm
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 08:00:00 on 2026-06-15.
In the last 24 hours, the best air quality in Northbrook, Illinois was observed at 02:00:00 on 2026-06-15.
As of now, the AQI in Northbrook, Illinois is 44, 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 2.546 μg/m3.
The PM10 concentration in Northbrook, Illinois is 12.203 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Northbrook, Illinois is 0.139 ppm.
Currently, Northbrook, Illinois has a sulfur dioxide (SO2) concentration of 0.447 ppb.
The current ozone (O3) level in Northbrook, Illinois at the moment is 48.025 ppm.
Nitrogen dioxide (NO2) level in Northbrook, Illinois at the moment is 7.729 ppb.
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