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)
54
Moderate
Normal, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.00 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
31.01 μg/m³
0
55
155
255
425
605+
56.00 ppb
0
55
71
86
201
201+
0.94 ppb
0
36
76
186
605
1005+
3.17 ppb
0
54
101
361
1250
2050+
0.18 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Normal, Illinois
Normal, Illinois
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AQI 54
Moderate
7.03μg/m³
PM2.5
31.14μg/m³
PM10
55.97ppb
O3
0.94ppb
SO2
3.18ppb
NO2
0.18ppm
CO
AQI 49
Good
8.55μg/m³
PM2.5
48.19μg/m³
PM10
53.28ppb
O3
0.86ppb
SO2
3.29ppb
NO2
0.20ppm
CO
AQI 49
Good
8.99μg/m³
PM2.5
38.02μg/m³
PM10
51.73ppb
O3
0.86ppb
SO2
3.30ppb
NO2
0.20ppm
CO
AQI 49
Good
8.74μg/m³
PM2.5
32.55μg/m³
PM10
49.38ppb
O3
1.04ppb
SO2
3.01ppb
NO2
0.19ppm
CO
AQI 48
Good
8.08μg/m³
PM2.5
37.37μg/m³
PM10
51.58ppb
O3
0.98ppb
SO2
3.25ppb
NO2
0.17ppm
CO
AQI 49
Good
9.45μg/m³
PM2.5
42.88μg/m³
PM10
53.14ppb
O3
0.88ppb
SO2
3.83ppb
NO2
0.20ppm
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 03:00:00 on 2026-10-22.
In the last 24 hours, the best air quality in Normal, Illinois was observed at 04:00:00 on 2026-10-22.
As of now, the AQI in Normal, Illinois is 54, indicating Moderate 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 7.002 μg/m3.
The PM10 concentration in Normal, Illinois is 31.01 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Normal, Illinois is 0.182 ppm.
Currently, Normal, Illinois has a sulfur dioxide (SO2) concentration of 0.944 ppb.
The current ozone (O3) level in Normal, Illinois at the moment is 55.998 ppm.
Nitrogen dioxide (NO2) level in Normal, Illinois at the moment is 3.17 ppb.
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