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)
29
Good
Cary, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.20 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
9.00 μg/m³
0
55
155
255
425
605+
31.00 ppb
0
55
71
86
201
201+
0.45 ppb
0
36
76
186
605
1005+
12.11 ppb
0
54
101
361
1250
2050+
0.26 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Cary, Illinois
Cary, Illinois
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AQI 36
Good
1.85μg/m³
PM2.5
8.15μg/m³
PM10
39.11ppb
O3
0.31ppb
SO2
2.90ppb
NO2
0.14ppm
CO
AQI 35
Good
1.96μg/m³
PM2.5
8.65μg/m³
PM10
37.58ppb
O3
0.31ppb
SO2
2.82ppb
NO2
0.14ppm
CO
AQI 35
Good
1.95μg/m³
PM2.5
8.61μg/m³
PM10
37.66ppb
O3
0.31ppb
SO2
2.82ppb
NO2
0.14ppm
CO
AQI 33
Good
1.67μg/m³
PM2.5
9.32μg/m³
PM10
36.43ppb
O3
0.31ppb
SO2
2.95ppb
NO2
0.14ppm
CO
AQI 33
Good
2.11μg/m³
PM2.5
9.20μg/m³
PM10
35.84ppb
O3
0.32ppb
SO2
2.76ppb
NO2
0.14ppm
CO
AQI 32
Good
1.63μg/m³
PM2.5
6.99μg/m³
PM10
34.55ppb
O3
0.32ppb
SO2
2.80ppb
NO2
0.14ppm
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 02:00:00 on 2026-06-14.
In the last 24 hours, the best air quality in Cary, Illinois was observed at 09:00:00 on 2026-06-14.
As of now, the AQI in Cary, Illinois is 37, 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 1.8 μg/m3.
The PM10 concentration in Cary, Illinois is 8 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Cary, Illinois is 0.139 ppm.
Currently, Cary, Illinois has a sulfur dioxide (SO2) concentration of 0.309 ppb.
The current ozone (O3) level in Cary, Illinois at the moment is 39.999 ppm.
Nitrogen dioxide (NO2) level in Cary, Illinois at the moment is 2.93 ppb.
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