Stay updated with real-time air quality in Sterling, 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)
40
Good
Sterling, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.44 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
28.70 μg/m³
0
55
155
255
425
605+
43.00 ppb
0
55
71
86
201
201+
0.95 ppb
0
36
76
186
605
1005+
1.94 ppb
0
54
101
361
1250
2050+
0.16 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Sterling, Illinois
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AQI 40
Good
4.98μg/m³
PM2.5
23.34μg/m³
PM10
43.11ppb
O3
1.06ppb
SO2
2.16ppb
NO2
0.16ppm
CO
AQI 44
Good
5.06μg/m³
PM2.5
22.07μg/m³
PM10
46.57ppb
O3
0.49ppb
SO2
1.82ppb
NO2
0.18ppm
CO
AQI 38
Good
4.73μg/m³
PM2.5
19.46μg/m³
PM10
40.54ppb
O3
0.66ppb
SO2
2.17ppb
NO2
0.15ppm
CO
AQI 39
Good
5.46μg/m³
PM2.5
24.60μg/m³
PM10
42.21ppb
O3
0.64ppb
SO2
1.38ppb
NO2
0.17ppm
CO
AQI 44
Good
4.88μg/m³
PM2.5
21.10μg/m³
PM10
48.26ppb
O3
0.73ppb
SO2
1.73ppb
NO2
0.20ppm
CO
AQI 39
Good
5.20μg/m³
PM2.5
23.01μg/m³
PM10
41.83ppb
O3
1.26ppb
SO2
2.33ppb
NO2
0.14ppm
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 Sterling, Illinois is updated on an hourly basis.
The worst air quality in Sterling, Illinois was recorded at 08:00:00 on 2026-07-23.
The best air quality in Sterling, Illinois was recorded at 11:00:00 on 2026-07-23.
The real-time air quality index in Sterling, Illinois is 40, currently categorized as Good.
The most common pollutant in Sterling, Illinois is O3.
If the air quality in Sterling, Illinois is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Sterling, Illinois at present are 6.444 μg/m3.
The current PM10 levels in Sterling, Illinois are 28.696 μg/m3.
The current carbon monoxide (CO) level in Sterling, Illinois is 0.164 ppm.
The current sulfur dioxide (SO2) levels in Sterling, Illinois are 0.951 ppb.
The current ozone (O3) levels at Sterling, Illinois is 42.998 ppm.
The current nitrogen dioxide (NO2) levels at Sterling, Illinois is 1.942 ppb.
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