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)
21
Good
Sterling, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.62 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
11.58 μg/m³
0
55
155
255
425
605+
22.54 ppb
0
55
71
86
201
201+
0.28 ppb
0
36
76
186
605
1005+
4.29 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 19
Good
2.67μg/m³
PM2.5
11.00μg/m³
PM10
20.47ppb
O3
0.29ppb
SO2
4.69ppb
NO2
0.17ppm
CO
AQI 20
Good
2.00μg/m³
PM2.5
8.44μg/m³
PM10
22.20ppb
O3
0.24ppb
SO2
3.63ppb
NO2
0.15ppm
CO
AQI 19
Good
2.09μg/m³
PM2.5
10.64μg/m³
PM10
20.95ppb
O3
0.28ppb
SO2
4.81ppb
NO2
0.16ppm
CO
AQI 22
Good
2.63μg/m³
PM2.5
9.68μg/m³
PM10
24.29ppb
O3
0.23ppb
SO2
3.51ppb
NO2
0.16ppm
CO
AQI 19
Good
2.60μg/m³
PM2.5
10.68μg/m³
PM10
20.99ppb
O3
0.18ppb
SO2
2.77ppb
NO2
0.11ppm
CO
AQI 20
Good
2.00μg/m³
PM2.5
8.00μg/m³
PM10
22.32ppb
O3
0.30ppb
SO2
6.55ppb
NO2
0.17ppm
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 06:00:00 on 2026-03-10.
The best air quality in Sterling, Illinois was recorded at 01:00:00 on 2026-03-11.
The real-time air quality index in Sterling, Illinois is 21, 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 2.619 μg/m3.
The current PM10 levels in Sterling, Illinois are 11.578 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 0.276 ppb.
The current ozone (O3) levels at Sterling, Illinois is 22.536 ppm.
The current nitrogen dioxide (NO2) levels at Sterling, Illinois is 4.295 ppb.
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