Stay updated with real-time air quality in Normal, 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)
24
Good
Normal, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
1.20 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
5.00 μg/m³
0
55
155
255
425
605+
26.00 ppb
0
55
71
86
201
201+
1.10 ppb
0
36
76
186
605
1005+
4.03 ppb
0
54
101
361
1250
2050+
0.13 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Normal, Illinois
Normal, Illinois
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AQI 24
Good
1.21μg/m³
PM2.5
5.07μg/m³
PM10
26.00ppb
O3
1.10ppb
SO2
4.03ppb
NO2
0.13ppm
CO
AQI 25
Good
2.07μg/m³
PM2.5
9.87μg/m³
PM10
26.93ppb
O3
1.17ppb
SO2
4.00ppb
NO2
0.13ppm
CO
AQI 25
Good
2.00μg/m³
PM2.5
9.20μg/m³
PM10
27.01ppb
O3
1.04ppb
SO2
4.01ppb
NO2
0.13ppm
CO
AQI 27
Good
2.60μg/m³
PM2.5
12.38μg/m³
PM10
28.73ppb
O3
1.34ppb
SO2
3.88ppb
NO2
0.13ppm
CO
AQI 24
Good
2.11μg/m³
PM2.5
10.66μg/m³
PM10
25.70ppb
O3
0.25ppb
SO2
4.33ppb
NO2
0.13ppm
CO
AQI 25
Good
2.35μg/m³
PM2.5
10.32μg/m³
PM10
27.00ppb
O3
1.01ppb
SO2
3.72ppb
NO2
0.13ppm
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 Normal, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Normal, Illinois was at its worst at 11:00:00 on 2026-05-20.
In the last 24 hours, the best air quality in Normal, Illinois was observed at 01:00:00 on 2026-05-20.
As of now, the AQI in Normal, Illinois is 24, indicating Good conditions.
Normal, Illinois air has the highest levels of O3.
Poor air quality in Normal, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Normal, Illinois are currently 1.201 μg/m3.
The PM10 concentration in Normal, Illinois is 5.005 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Normal, Illinois is 0.127 ppm.
Currently, Normal, Illinois has a sulfur dioxide (SO2) concentration of 1.105 ppb.
The current ozone (O3) level in Normal, Illinois at the moment is 26 ppm.
Nitrogen dioxide (NO2) level in Normal, Illinois at the moment is 4.034 ppb.
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