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)
32
Good
Cary, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.80 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
17.00 μg/m³
0
55
155
255
425
605+
35.00 ppb
0
55
71
86
201
201+
0.22 ppb
0
36
76
186
605
1005+
4.52 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Cary, Illinois
Cary, Illinois
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AQI 32
Good
3.87μg/m³
PM2.5
17.03μg/m³
PM10
34.89ppb
O3
0.22ppb
SO2
4.51ppb
NO2
0.23ppm
CO
AQI 32
Good
3.78μg/m³
PM2.5
16.72μg/m³
PM10
34.74ppb
O3
0.22ppb
SO2
4.45ppb
NO2
0.23ppm
CO
AQI 32
Good
3.78μg/m³
PM2.5
16.72μg/m³
PM10
34.70ppb
O3
0.22ppb
SO2
4.45ppb
NO2
0.23ppm
CO
AQI 27
Good
4.33μg/m³
PM2.5
21.71μg/m³
PM10
28.98ppb
O3
0.22ppb
SO2
4.89ppb
NO2
0.23ppm
CO
AQI 32
Good
3.76μg/m³
PM2.5
16.52μg/m³
PM10
34.68ppb
O3
0.22ppb
SO2
4.41ppb
NO2
0.22ppm
CO
AQI 31
Good
4.47μg/m³
PM2.5
21.88μg/m³
PM10
33.03ppb
O3
0.22ppb
SO2
4.86ppb
NO2
0.23ppm
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 2026-04-27.
In the last 24 hours, the best air quality in Cary, Illinois was observed at 08:00:00 on 2026-04-27.
As of now, the AQI in Cary, Illinois is 32, 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 3.8 μg/m3.
The PM10 concentration in Cary, Illinois is 17 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Cary, Illinois is 0.228 ppm.
Currently, Cary, Illinois has a sulfur dioxide (SO2) concentration of 0.223 ppb.
The current ozone (O3) level in Cary, Illinois at the moment is 35 ppm.
Nitrogen dioxide (NO2) level in Cary, Illinois at the moment is 4.521 ppb.
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