Stay updated with real-time air quality in Crest Hill, 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)
86
Moderate
Crest Hill, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
27.54 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
119.31 μg/m³
0
55
155
255
425
605+
45.37 ppb
0
55
71
86
201
201+
1.84 ppb
0
36
76
186
605
1005+
5.10 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Crest Hill, Illinois
Crest Hill, Illinois
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AQI 84
Moderate
27.41μg/m³
PM2.5
118.82μg/m³
PM10
45.43ppb
O3
1.84ppb
SO2
5.08ppb
NO2
0.24ppm
CO
AQI 94
Moderate
31.58μg/m³
PM2.5
133.37μg/m³
PM10
41.91ppb
O3
1.85ppb
SO2
5.38ppb
NO2
0.25ppm
CO
AQI 97
Moderate
33.79μg/m³
PM2.5
135.15μg/m³
PM10
46.86ppb
O3
1.68ppb
SO2
4.99ppb
NO2
0.24ppm
CO
AQI 96
Moderate
33.11μg/m³
PM2.5
138.97μg/m³
PM10
41.18ppb
O3
1.83ppb
SO2
5.55ppb
NO2
0.25ppm
CO
AQI 90
Moderate
29.99μg/m³
PM2.5
128.69μg/m³
PM10
45.00ppb
O3
1.74ppb
SO2
5.67ppb
NO2
0.25ppm
CO
AQI 119
Unhealthy for sensitive groups
38.79μg/m³
PM2.5
190.93μg/m³
PM10
47.34ppb
O3
2.01ppb
SO2
4.92ppb
NO2
0.28ppm
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 Crest Hill, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Crest Hill, Illinois was at its worst at 03:00:00 on 2025-07-14.
In the last 24 hours, the best air quality in Crest Hill, Illinois was observed at 07:00:00 on 2025-07-13.
As of now, the AQI in Crest Hill, Illinois is 86, indicating Moderate conditions.
Crest Hill, Illinois air has the highest levels of PM2.5.
Poor air quality in Crest Hill, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Crest Hill, Illinois are currently 27.54 μg/m3.
The PM10 concentration in Crest Hill, Illinois is 119.306 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Crest Hill, Illinois is 0.241 ppm.
Currently, Crest Hill, Illinois has a sulfur dioxide (SO2) concentration of 1.837 ppb.
The current ozone (O3) level in Crest Hill, Illinois at the moment is 45.369 ppm.
Nitrogen dioxide (NO2) level in Crest Hill, Illinois at the moment is 5.101 ppb.
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