Stay updated with real-time air quality in Crestwood, 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)
49
Good
Crestwood, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
9.09 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
41.23 μg/m³
0
55
155
255
425
605+
20.08 ppb
0
55
71
86
201
201+
0.50 ppb
0
36
76
186
605
1005+
7.56 ppb
0
54
101
361
1250
2050+
0.15 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Crestwood, Illinois
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AQI 44
Good
8.10μg/m³
PM2.5
36.01μg/m³
PM10
23.00ppb
O3
0.38ppb
SO2
10.48ppb
NO2
0.23ppm
CO
AQI 44
Good
8.40μg/m³
PM2.5
37.37μg/m³
PM10
22.92ppb
O3
0.38ppb
SO2
10.20ppb
NO2
0.23ppm
CO
AQI 44
Good
8.48μg/m³
PM2.5
37.73μg/m³
PM10
22.92ppb
O3
0.38ppb
SO2
10.18ppb
NO2
0.23ppm
CO
AQI 44
Good
8.26μg/m³
PM2.5
36.73μg/m³
PM10
23.05ppb
O3
0.38ppb
SO2
10.50ppb
NO2
0.23ppm
CO
AQI 49
Good
8.53μg/m³
PM2.5
37.94μg/m³
PM10
22.83ppb
O3
0.38ppb
SO2
10.17ppb
NO2
0.23ppm
CO
AQI 44
Good
8.17μg/m³
PM2.5
36.45μg/m³
PM10
24.46ppb
O3
0.39ppb
SO2
10.53ppb
NO2
0.23ppm
CO
Air quality measurements for Illinois, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for Crestwood, Illinois is updated on an hourly basis.
The worst air quality in Crestwood, Illinois was recorded at 07:00:00 on 2026-03-10.
The best air quality in Crestwood, Illinois was recorded at 03:00:00 on 2026-03-10.
The real-time air quality index in Crestwood, Illinois is 44, currently categorized as Good.
The most common pollutant in Crestwood, Illinois is PM2.5.
If the air quality in Crestwood, Illinois is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Crestwood, Illinois at present are 8.037 μg/m3.
The current PM10 levels in Crestwood, Illinois are 35.246 μg/m3.
The current carbon monoxide (CO) level in Crestwood, Illinois is 0.233 ppm.
The current sulfur dioxide (SO2) levels in Crestwood, Illinois are 0.364 ppb.
The current ozone (O3) levels at Crestwood, Illinois is 21.701 ppm.
The current nitrogen dioxide (NO2) levels at Crestwood, Illinois is 4.163 ppb.
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