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)
50
Good
Normal, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
9.40 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
42.01 μg/m³
0
55
155
255
425
605+
53.99 ppb
0
55
71
86
201
201+
0.93 ppb
0
36
76
186
605
1005+
5.98 ppb
0
54
101
361
1250
2050+
0.18 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Normal, Illinois
Normal, Illinois
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AQI 50
Good
9.42μg/m³
PM2.5
42.09μg/m³
PM10
53.93ppb
O3
0.94ppb
SO2
5.98ppb
NO2
0.18ppm
CO
AQI 52
Moderate
10.21μg/m³
PM2.5
44.85μg/m³
PM10
50.23ppb
O3
2.01ppb
SO2
5.89ppb
NO2
0.20ppm
CO
AQI 52
Moderate
10.23μg/m³
PM2.5
42.15μg/m³
PM10
50.05ppb
O3
2.01ppb
SO2
5.95ppb
NO2
0.20ppm
CO
AQI 52
Moderate
9.82μg/m³
PM2.5
45.39μg/m³
PM10
50.43ppb
O3
0.93ppb
SO2
5.82ppb
NO2
0.16ppm
CO
AQI 52
Moderate
10.03μg/m³
PM2.5
37.98μg/m³
PM10
48.81ppb
O3
1.75ppb
SO2
6.13ppb
NO2
0.18ppm
CO
AQI 54
Moderate
10.81μg/m³
PM2.5
48.33μg/m³
PM10
48.67ppb
O3
2.08ppb
SO2
5.89ppb
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 01:00:00 on 2026-04-24.
In the last 24 hours, the best air quality in Normal, Illinois was observed at 09:00:00 on 2026-04-23.
As of now, the AQI in Normal, Illinois is 50, 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 9.401 μg/m3.
The PM10 concentration in Normal, Illinois is 42.006 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Normal, Illinois is 0.184 ppm.
Currently, Normal, Illinois has a sulfur dioxide (SO2) concentration of 0.925 ppb.
The current ozone (O3) level in Normal, Illinois at the moment is 53.995 ppm.
Nitrogen dioxide (NO2) level in Normal, Illinois at the moment is 5.976 ppb.
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