Stay updated with real-time air quality in Champaign, 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)
40
Good
Champaign, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.10 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
18.02 μg/m³
0
55
155
255
425
605+
42.69 ppb
0
55
71
86
201
201+
0.81 ppb
0
36
76
186
605
1005+
4.64 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Champaign, Illinois
Champaign, Illinois
Scroll To Air Quality MapLoading...
AQI 40
Good
4.12μg/m³
PM2.5
18.25μg/m³
PM10
42.66ppb
O3
0.80ppb
SO2
4.63ppb
NO2
0.20ppm
CO
AQI 41
Good
4.16μg/m³
PM2.5
19.22μg/m³
PM10
44.47ppb
O3
0.79ppb
SO2
4.45ppb
NO2
0.20ppm
CO
AQI 40
Good
4.32μg/m³
PM2.5
20.91μg/m³
PM10
42.88ppb
O3
0.79ppb
SO2
4.58ppb
NO2
0.20ppm
CO
AQI 39
Good
0.84μg/m³
PM2.5
3.16μg/m³
PM10
42.22ppb
O3
0.18ppb
SO2
0.79ppb
NO2
0.13ppm
CO
AQI 43
Good
2.39μg/m³
PM2.5
9.94μg/m³
PM10
46.32ppb
O3
0.13ppb
SO2
0.77ppb
NO2
0.12ppm
CO
AQI 41
Good
4.04μg/m³
PM2.5
19.28μg/m³
PM10
44.47ppb
O3
1.00ppb
SO2
4.61ppb
NO2
0.23ppm
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 Champaign, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Champaign, Illinois was at its worst at 11:00:00 on 2026-07-23.
In the last 24 hours, the best air quality in Champaign, Illinois was observed at 03:00:00 on 2026-07-23.
As of now, the AQI in Champaign, Illinois is 40, indicating Good conditions.
Champaign, Illinois air has the highest levels of O3.
Poor air quality in Champaign, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Champaign, Illinois are currently 4.102 μg/m3.
The PM10 concentration in Champaign, Illinois is 18.025 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Champaign, Illinois is 0.205 ppm.
Currently, Champaign, Illinois has a sulfur dioxide (SO2) concentration of 0.806 ppb.
The current ozone (O3) level in Champaign, Illinois at the moment is 42.693 ppm.
Nitrogen dioxide (NO2) level in Champaign, Illinois at the moment is 4.642 ppb.
All Rights Reserved © Ambee Inc. 2025