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)
20
Good
Cary, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
3.00 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
12.00 μg/m³
0
55
155
255
425
605+
22.00 ppb
0
55
71
86
201
201+
0.56 ppb
0
36
76
186
605
1005+
3.12 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Cary, Illinois
Cary, Illinois
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AQI 20
Good
3.03μg/m³
PM2.5
12.27μg/m³
PM10
21.56ppb
O3
0.61ppb
SO2
4.81ppb
NO2
0.19ppm
CO
AQI 19
Good
3.07μg/m³
PM2.5
12.57μg/m³
PM10
20.81ppb
O3
0.61ppb
SO2
4.73ppb
NO2
0.19ppm
CO
AQI 19
Good
3.07μg/m³
PM2.5
12.56μg/m³
PM10
20.79ppb
O3
0.61ppb
SO2
4.73ppb
NO2
0.18ppm
CO
AQI 21
Good
3.43μg/m³
PM2.5
14.29μg/m³
PM10
23.17ppb
O3
0.61ppb
SO2
4.78ppb
NO2
0.19ppm
CO
AQI 19
Good
3.11μg/m³
PM2.5
12.97μg/m³
PM10
20.15ppb
O3
0.61ppb
SO2
4.67ppb
NO2
0.18ppm
CO
AQI 22
Good
3.58μg/m³
PM2.5
13.89μg/m³
PM10
23.33ppb
O3
0.62ppb
SO2
4.55ppb
NO2
0.19ppm
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 04:00:00 on 2025-09-05.
In the last 24 hours, the best air quality in Cary, Illinois was observed at 09:00:00 on 2025-09-06.
As of now, the AQI in Cary, Illinois is 20, 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 3 μg/m3.
The PM10 concentration in Cary, Illinois is 12 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Cary, Illinois is 0.189 ppm.
Currently, Cary, Illinois has a sulfur dioxide (SO2) concentration of 0.605 ppb.
The current ozone (O3) level in Cary, Illinois at the moment is 21.999 ppm.
Nitrogen dioxide (NO2) level in Cary, Illinois at the moment is 4.847 ppb.
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