Stay updated with real-time air quality in Mattoon, 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
Mattoon, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
4.07 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
13.20 μg/m³
0
55
155
255
425
605+
22.38 ppb
0
55
71
86
201
201+
0.81 ppb
0
36
76
186
605
1005+
5.62 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Mattoon, Illinois
Mattoon, Illinois
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AQI 44
Good
7.63μg/m³
PM2.5
30.23μg/m³
PM10
18.87ppb
O3
0.84ppb
SO2
3.20ppb
NO2
0.24ppm
CO
AQI 56
Moderate
11.87μg/m³
PM2.5
51.33μg/m³
PM10
16.13ppb
O3
0.85ppb
SO2
1.25ppb
NO2
0.24ppm
CO
AQI 27
Good
3.21μg/m³
PM2.5
14.03μg/m³
PM10
28.95ppb
O3
0.87ppb
SO2
2.04ppb
NO2
0.14ppm
CO
AQI 25
Good
2.67μg/m³
PM2.5
11.46μg/m³
PM10
27.48ppb
O3
0.92ppb
SO2
3.07ppb
NO2
0.15ppm
CO
AQI 26
Good
2.61μg/m³
PM2.5
11.05μg/m³
PM10
28.07ppb
O3
0.92ppb
SO2
3.16ppb
NO2
0.15ppm
CO
AQI 30
Good
3.47μg/m³
PM2.5
17.12μg/m³
PM10
32.45ppb
O3
0.92ppb
SO2
3.11ppb
NO2
0.16ppm
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 Mattoon, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Mattoon, Illinois was at its worst at 03:00:00 on 2025-07-20.
In the last 24 hours, the best air quality in Mattoon, Illinois was observed at 11:00:00 on 2025-07-19.
As of now, the AQI in Mattoon, Illinois is 49, indicating Good conditions.
Mattoon, Illinois air has the highest levels of PM2.5.
Poor air quality in Mattoon, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Mattoon, Illinois are currently 9.378 μg/m3.
The PM10 concentration in Mattoon, Illinois is 37.377 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Mattoon, Illinois is 0.225 ppm.
Currently, Mattoon, Illinois has a sulfur dioxide (SO2) concentration of 0.878 ppb.
The current ozone (O3) level in Mattoon, Illinois at the moment is 18.072 ppm.
Nitrogen dioxide (NO2) level in Mattoon, Illinois at the moment is 1.408 ppb.
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