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)
38
Good
Cary, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.00 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
31.01 μg/m³
0
55
155
255
425
605+
7.00 ppb
0
55
71
86
201
201+
0.96 ppb
0
36
76
186
605
1005+
14.39 ppb
0
54
101
361
1250
2050+
0.30 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Cary, Illinois
Cary, Illinois
Scroll To Air Quality MapLoading...
AQI 27
Good
4.78μg/m³
PM2.5
20.87μg/m³
PM10
11.36ppb
O3
0.99ppb
SO2
14.16ppb
NO2
0.42ppm
CO
AQI 27
Good
5.20μg/m³
PM2.5
22.89μg/m³
PM10
10.34ppb
O3
1.00ppb
SO2
14.52ppb
NO2
0.42ppm
CO
AQI 27
Good
5.17μg/m³
PM2.5
22.75μg/m³
PM10
10.30ppb
O3
1.00ppb
SO2
14.53ppb
NO2
0.42ppm
CO
AQI 22
Good
4.47μg/m³
PM2.5
18.59μg/m³
PM10
7.76ppb
O3
1.00ppb
SO2
13.94ppb
NO2
0.42ppm
CO
AQI 33
Good
5.67μg/m³
PM2.5
25.14μg/m³
PM10
9.44ppb
O3
1.01ppb
SO2
14.83ppb
NO2
0.42ppm
CO
AQI 22
Good
4.18μg/m³
PM2.5
10.78μg/m³
PM10
7.25ppb
O3
1.02ppb
SO2
16.41ppb
NO2
0.42ppm
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 12:00:00 on 2025-10-24.
In the last 24 hours, the best air quality in Cary, Illinois was observed at 01:00:00 on 2025-10-24.
As of now, the AQI in Cary, Illinois is 27, indicating Good conditions.
Cary, Illinois air has the highest levels of PM2.5.
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 4.5 μg/m3.
The PM10 concentration in Cary, Illinois is 20.001 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Cary, Illinois is 0.253 ppm.
Currently, Cary, Illinois has a sulfur dioxide (SO2) concentration of 1.207 ppb.
The current ozone (O3) level in Cary, Illinois at the moment is 11.999 ppm.
Nitrogen dioxide (NO2) level in Cary, Illinois at the moment is 13.938 ppb.
All Rights Reserved © Ambee Inc. 2025