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)
44
Good
Normal, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.70 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
34.00 μg/m³
0
55
155
255
425
605+
25.44 ppb
0
55
71
86
201
201+
1.31 ppb
0
36
76
186
605
1005+
4.00 ppb
0
54
101
361
1250
2050+
0.17 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Normal, Illinois
Normal, Illinois
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AQI 44
Good
7.51μg/m³
PM2.5
33.04μg/m³
PM10
24.77ppb
O3
0.63ppb
SO2
4.10ppb
NO2
0.17ppm
CO
AQI 44
Good
8.30μg/m³
PM2.5
34.17μg/m³
PM10
25.55ppb
O3
0.67ppb
SO2
4.01ppb
NO2
0.17ppm
CO
AQI 44
Good
8.38μg/m³
PM2.5
34.66μg/m³
PM10
25.57ppb
O3
0.82ppb
SO2
4.03ppb
NO2
0.17ppm
CO
AQI 44
Good
7.59μg/m³
PM2.5
37.31μg/m³
PM10
23.59ppb
O3
0.60ppb
SO2
3.10ppb
NO2
0.16ppm
CO
AQI 38
Good
7.38μg/m³
PM2.5
29.54μg/m³
PM10
25.93ppb
O3
0.89ppb
SO2
4.13ppb
NO2
0.17ppm
CO
AQI 49
Good
8.99μg/m³
PM2.5
40.95μg/m³
PM10
24.25ppb
O3
0.80ppb
SO2
3.98ppb
NO2
0.17ppm
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 06:00:00 on 2025-11-14.
In the last 24 hours, the best air quality in Normal, Illinois was observed at 10:00:00 on 2025-11-14.
As of now, the AQI in Normal, Illinois is 44, indicating Good conditions.
Normal, Illinois air has the highest levels of PM2.5.
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 8.102 μg/m3.
The PM10 concentration in Normal, Illinois is 36.008 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Normal, Illinois is 0.172 ppm.
Currently, Normal, Illinois has a sulfur dioxide (SO2) concentration of 0.423 ppb.
The current ozone (O3) level in Normal, Illinois at the moment is 24.071 ppm.
Nitrogen dioxide (NO2) level in Normal, Illinois at the moment is 6.209 ppb.
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