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
6.60 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
30.00 μg/m³
0
55
155
255
425
605+
16.66 ppb
0
55
71
86
201
201+
0.62 ppb
0
36
76
186
605
1005+
7.85 ppb
0
54
101
361
1250
2050+
0.15 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Cary, Illinois
Cary, Illinois
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AQI 49
Good
9.29μg/m³
PM2.5
42.20μg/m³
PM10
18.55ppb
O3
0.67ppb
SO2
6.25ppb
NO2
0.15ppm
CO
AQI 52
Moderate
9.78μg/m³
PM2.5
44.16μg/m³
PM10
18.64ppb
O3
0.65ppb
SO2
6.22ppb
NO2
0.15ppm
CO
AQI 52
Moderate
9.77μg/m³
PM2.5
44.14μg/m³
PM10
18.64ppb
O3
0.65ppb
SO2
6.22ppb
NO2
0.15ppm
CO
AQI 54
Moderate
11.05μg/m³
PM2.5
49.84μg/m³
PM10
18.27ppb
O3
0.69ppb
SO2
6.40ppb
NO2
0.15ppm
CO
AQI 52
Moderate
10.29μg/m³
PM2.5
46.19μg/m³
PM10
18.73ppb
O3
0.64ppb
SO2
6.19ppb
NO2
0.15ppm
CO
AQI 54
Moderate
10.98μg/m³
PM2.5
49.76μg/m³
PM10
18.44ppb
O3
0.65ppb
SO2
6.45ppb
NO2
0.15ppm
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 06:00:00 on 2025-12-10.
In the last 24 hours, the best air quality in Cary, Illinois was observed at 09:00:00 on 2025-12-09.
As of now, the AQI in Cary, Illinois is 38, 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 6.6 μg/m3.
The PM10 concentration in Cary, Illinois is 30.001 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Cary, Illinois is 0.15 ppm.
Currently, Cary, Illinois has a sulfur dioxide (SO2) concentration of 0.623 ppb.
The current ozone (O3) level in Cary, Illinois at the moment is 16.664 ppm.
Nitrogen dioxide (NO2) level in Cary, Illinois at the moment is 7.854 ppb.
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