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)
22
Good
Normal, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
4.40 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
19.01 μg/m³
0
55
155
255
425
605+
24.00 ppb
0
55
71
86
201
201+
0.68 ppb
0
36
76
186
605
1005+
2.72 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 22
Good
4.41μg/m³
PM2.5
19.11μg/m³
PM10
24.02ppb
O3
0.68ppb
SO2
2.71ppb
NO2
0.18ppm
CO
AQI 31
Good
4.38μg/m³
PM2.5
34.30μg/m³
PM10
25.42ppb
O3
0.41ppb
SO2
2.27ppb
NO2
0.19ppm
CO
AQI 23
Good
4.17μg/m³
PM2.5
21.21μg/m³
PM10
25.44ppb
O3
0.47ppb
SO2
0.90ppb
NO2
0.19ppm
CO
AQI 25
Good
3.49μg/m³
PM2.5
26.69μg/m³
PM10
27.43ppb
O3
0.66ppb
SO2
2.48ppb
NO2
0.16ppm
CO
AQI 33
Good
5.92μg/m³
PM2.5
18.65μg/m³
PM10
25.72ppb
O3
0.59ppb
SO2
3.15ppb
NO2
0.20ppm
CO
AQI 23
Good
4.20μg/m³
PM2.5
23.68μg/m³
PM10
25.36ppb
O3
0.43ppb
SO2
2.11ppb
NO2
0.19ppm
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 2025-09-05.
In the last 24 hours, the best air quality in Normal, Illinois was observed at 11:00:00 on 2025-09-05.
As of now, the AQI in Normal, Illinois is 22, 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 4.4 μg/m3.
The PM10 concentration in Normal, Illinois is 19.008 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 0.678 ppb.
The current ozone (O3) level in Normal, Illinois at the moment is 24.001 ppm.
Nitrogen dioxide (NO2) level in Normal, Illinois at the moment is 2.716 ppb.
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