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
7.90 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
35.02 μg/m³
0
55
155
255
425
605+
36.00 ppb
0
55
71
86
201
201+
0.50 ppb
0
36
76
186
605
1005+
3.74 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Normal, Illinois
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AQI 44
Good
7.95μg/m³
PM2.5
35.23μg/m³
PM10
36.03ppb
O3
0.51ppb
SO2
3.74ppb
NO2
0.23ppm
CO
AQI 52
Moderate
10.08μg/m³
PM2.5
47.14μg/m³
PM10
41.43ppb
O3
0.85ppb
SO2
3.69ppb
NO2
0.22ppm
CO
AQI 52
Moderate
10.39μg/m³
PM2.5
48.97μg/m³
PM10
41.56ppb
O3
0.86ppb
SO2
3.70ppb
NO2
0.22ppm
CO
AQI 39
Good
7.42μg/m³
PM2.5
28.92μg/m³
PM10
41.70ppb
O3
0.56ppb
SO2
2.66ppb
NO2
0.23ppm
CO
AQI 49
Good
8.57μg/m³
PM2.5
35.55μg/m³
PM10
38.57ppb
O3
0.72ppb
SO2
3.77ppb
NO2
0.23ppm
CO
AQI 56
Moderate
11.94μg/m³
PM2.5
53.59μg/m³
PM10
41.71ppb
O3
0.89ppb
SO2
3.73ppb
NO2
0.21ppm
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 10:00:00 on 2026-03-09.
In the last 24 hours, the best air quality in Normal, Illinois was observed at 11:00:00 on 2026-03-09.
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 7.903 μg/m3.
The PM10 concentration in Normal, Illinois is 35.016 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Normal, Illinois is 0.234 ppm.
Currently, Normal, Illinois has a sulfur dioxide (SO2) concentration of 0.501 ppb.
The current ozone (O3) level in Normal, Illinois at the moment is 36.002 ppm.
Nitrogen dioxide (NO2) level in Normal, Illinois at the moment is 3.739 ppb.
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