Stay updated with real-time air quality in Chicago Heights, 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)
33
Good
Chicago Heights, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.25 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.14 μg/m³
0
55
155
255
425
605+
35.64 ppb
0
55
71
86
201
201+
0.63 ppb
0
36
76
186
605
1005+
1.13 ppb
0
54
101
361
1250
2050+
0.17 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Chicago Heights, Illinois
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AQI 31
Good
2.82μg/m³
PM2.5
11.81μg/m³
PM10
33.40ppb
O3
0.76ppb
SO2
1.05ppb
NO2
0.17ppm
CO
AQI 31
Good
2.82μg/m³
PM2.5
11.81μg/m³
PM10
33.40ppb
O3
0.76ppb
SO2
1.05ppb
NO2
0.17ppm
CO
AQI 32
Good
2.84μg/m³
PM2.5
12.47μg/m³
PM10
34.52ppb
O3
0.79ppb
SO2
1.07ppb
NO2
0.17ppm
CO
AQI 31
Good
2.67μg/m³
PM2.5
11.79μg/m³
PM10
33.06ppb
O3
0.87ppb
SO2
1.08ppb
NO2
0.17ppm
CO
AQI 32
Good
3.00μg/m³
PM2.5
12.81μg/m³
PM10
35.01ppb
O3
0.87ppb
SO2
1.07ppb
NO2
0.17ppm
CO
AQI 33
Good
3.06μg/m³
PM2.5
12.81μg/m³
PM10
35.80ppb
O3
0.91ppb
SO2
1.04ppb
NO2
0.17ppm
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 Chicago Heights, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Chicago Heights, Illinois was at its worst at 12:00:00 on 2026-03-14.
In the last 24 hours, the best air quality in Chicago Heights, Illinois was observed at 03:00:00 on 2026-03-14.
As of now, the AQI in Chicago Heights, Illinois is 33, indicating Good conditions.
Chicago Heights, Illinois air has the highest levels of O3.
Poor air quality in Chicago Heights, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Chicago Heights, Illinois are currently 3.247 μg/m3.
The PM10 concentration in Chicago Heights, Illinois is 14.145 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Chicago Heights, Illinois is 0.166 ppm.
Currently, Chicago Heights, Illinois has a sulfur dioxide (SO2) concentration of 0.625 ppb.
The current ozone (O3) level in Chicago Heights, Illinois at the moment is 35.639 ppm.
Nitrogen dioxide (NO2) level in Chicago Heights, Illinois at the moment is 1.127 ppb.
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