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

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.80 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
34.00 μg/m³
0
55
155
255
425
605+
53.00 ppb
0
55
71
86
201
201+
0.98 ppb
0
36
76
186
605
1005+
5.59 ppb
0
54
101
361
1250
2050+
0.26 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Cary, Illinois
Cary, Illinois
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AQI 50
Good
8.10μg/m³
PM2.5
35.54μg/m³
PM10
53.51ppb
O3
1.26ppb
SO2
3.57ppb
NO2
0.26ppm
CO
AQI 49
Good
8.60μg/m³
PM2.5
38.09μg/m³
PM10
50.46ppb
O3
1.31ppb
SO2
3.93ppb
NO2
0.26ppm
CO
AQI 49
Good
8.61μg/m³
PM2.5
38.14μg/m³
PM10
50.52ppb
O3
1.32ppb
SO2
3.95ppb
NO2
0.26ppm
CO
AQI 54
Moderate
10.85μg/m³
PM2.5
50.81μg/m³
PM10
33.79ppb
O3
1.39ppb
SO2
5.30ppb
NO2
0.27ppm
CO
AQI 49
Good
9.07μg/m³
PM2.5
40.47μg/m³
PM10
47.45ppb
O3
1.36ppb
SO2
4.28ppb
NO2
0.26ppm
CO
AQI 54
Moderate
10.87μg/m³
PM2.5
56.80μg/m³
PM10
33.99ppb
O3
1.44ppb
SO2
7.74ppb
NO2
0.26ppm
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 Cary, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Cary, Illinois was at its worst at 07:00:00 on 2026-10-22.
In the last 24 hours, the best air quality in Cary, Illinois was observed at 03:00:00 on 2026-10-22.
As of now, the AQI in Cary, Illinois is 49, indicating Good conditions.
Cary, Illinois air has the highest levels of O3.
Poor air quality in Cary, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Cary, Illinois are currently 7.8 μg/m3.
The PM10 concentration in Cary, Illinois is 34.002 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Cary, Illinois is 0.264 ppm.
Currently, Cary, Illinois has a sulfur dioxide (SO2) concentration of 0.982 ppb.
The current ozone (O3) level in Cary, Illinois at the moment is 52.999 ppm.
Nitrogen dioxide (NO2) level in Cary, Illinois at the moment is 5.586 ppb.
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