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)
27
Good
Sterling, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.44 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
26.46 μg/m³
0
55
155
255
425
605+
13.95 ppb
0
55
71
86
201
201+
0.26 ppb
0
36
76
186
605
1005+
4.92 ppb
0
54
101
361
1250
2050+
0.22 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Sterling, Illinois
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AQI 27
Good
5.09μg/m³
PM2.5
25.92μg/m³
PM10
13.19ppb
O3
0.37ppb
SO2
4.99ppb
NO2
0.22ppm
CO
AQI 33
Good
6.29μg/m³
PM2.5
27.42μg/m³
PM10
16.73ppb
O3
0.14ppb
SO2
4.97ppb
NO2
0.20ppm
CO
AQI 33
Good
5.58μg/m³
PM2.5
28.13μg/m³
PM10
16.24ppb
O3
0.28ppb
SO2
6.93ppb
NO2
0.23ppm
CO
AQI 33
Good
5.99μg/m³
PM2.5
24.54μg/m³
PM10
20.12ppb
O3
0.38ppb
SO2
5.39ppb
NO2
0.17ppm
CO
AQI 33
Good
5.98μg/m³
PM2.5
27.07μg/m³
PM10
23.47ppb
O3
0.39ppb
SO2
4.65ppb
NO2
0.20ppm
CO
AQI 33
Good
5.90μg/m³
PM2.5
26.98μg/m³
PM10
17.47ppb
O3
0.59ppb
SO2
7.11ppb
NO2
0.24ppm
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 03:00:00 on 2026-09-07.
The best air quality in Sterling, Illinois was recorded at 11:00:00 on 2026-09-07.
The real-time air quality index in Sterling, Illinois is 27, currently categorized as Good.
The most common pollutant in Sterling, Illinois is PM2.5.
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 5.437 μg/m3.
The current PM10 levels in Sterling, Illinois are 26.462 μg/m3.
The current carbon monoxide (CO) level in Sterling, Illinois is 0.218 ppm.
The current sulfur dioxide (SO2) levels in Sterling, Illinois are 0.263 ppb.
The current ozone (O3) levels at Sterling, Illinois is 13.952 ppm.
The current nitrogen dioxide (NO2) levels at Sterling, Illinois is 4.916 ppb.
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