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)
49
Good
Normal, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.70 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
38.01 μg/m³
0
55
155
255
425
605+
24.00 ppb
0
55
71
86
201
201+
0.45 ppb
0
36
76
186
605
1005+
4.56 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Normal, Illinois
Normal, Illinois
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AQI 49
Good
8.73μg/m³
PM2.5
38.12μg/m³
PM10
24.00ppb
O3
0.45ppb
SO2
4.55ppb
NO2
0.21ppm
CO
AQI 49
Good
9.18μg/m³
PM2.5
23.23μg/m³
PM10
23.59ppb
O3
0.38ppb
SO2
4.45ppb
NO2
0.17ppm
CO
AQI 52
Moderate
9.81μg/m³
PM2.5
25.83μg/m³
PM10
23.09ppb
O3
0.44ppb
SO2
4.47ppb
NO2
0.17ppm
CO
AQI 44
Good
8.15μg/m³
PM2.5
24.20μg/m³
PM10
30.90ppb
O3
0.38ppb
SO2
2.70ppb
NO2
0.18ppm
CO
AQI 54
Moderate
10.76μg/m³
PM2.5
35.31μg/m³
PM10
24.65ppb
O3
0.56ppb
SO2
4.63ppb
NO2
0.21ppm
CO
AQI 52
Moderate
10.03μg/m³
PM2.5
38.76μg/m³
PM10
22.76ppb
O3
0.42ppb
SO2
3.83ppb
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 10:00:00 on 2026-06-08.
In the last 24 hours, the best air quality in Normal, Illinois was observed at 08:00:00 on 2026-06-08.
As of now, the AQI in Normal, Illinois is 49, 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 8.702 μg/m3.
The PM10 concentration in Normal, Illinois is 38.007 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Normal, Illinois is 0.211 ppm.
Currently, Normal, Illinois has a sulfur dioxide (SO2) concentration of 0.453 ppb.
The current ozone (O3) level in Normal, Illinois at the moment is 24 ppm.
Nitrogen dioxide (NO2) level in Normal, Illinois at the moment is 4.557 ppb.
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