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)
38
Good
Mattoon, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.04 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
30.84 μg/m³
0
55
155
255
425
605+
16.43 ppb
0
55
71
86
201
201+
0.63 ppb
0
36
76
186
605
1005+
5.14 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 33
Good
6.33μg/m³
PM2.5
28.53μg/m³
PM10
20.52ppb
O3
0.53ppb
SO2
4.63ppb
NO2
0.18ppm
CO
AQI 38
Good
6.66μg/m³
PM2.5
29.97μg/m³
PM10
11.27ppb
O3
0.57ppb
SO2
5.70ppb
NO2
0.20ppm
CO
AQI 27
Good
2.70μg/m³
PM2.5
11.02μg/m³
PM10
28.61ppb
O3
0.36ppb
SO2
5.21ppb
NO2
0.18ppm
CO
AQI 29
Good
2.69μg/m³
PM2.5
11.00μg/m³
PM10
30.71ppb
O3
0.77ppb
SO2
6.15ppb
NO2
0.12ppm
CO
AQI 29
Good
2.70μg/m³
PM2.5
11.00μg/m³
PM10
30.62ppb
O3
0.82ppb
SO2
6.13ppb
NO2
0.12ppm
CO
AQI 29
Good
2.59μg/m³
PM2.5
7.70μg/m³
PM10
30.79ppb
O3
0.89ppb
SO2
7.14ppb
NO2
0.13ppm
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 06:00:00 on 2025-11-16.
In the last 24 hours, the best air quality in Mattoon, Illinois was observed at 12:00:00 on 2025-11-16.
As of now, the AQI in Mattoon, Illinois is 38, 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 7.037 μg/m3.
The PM10 concentration in Mattoon, Illinois is 30.841 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Mattoon, Illinois is 0.189 ppm.
Currently, Mattoon, Illinois has a sulfur dioxide (SO2) concentration of 0.625 ppb.
The current ozone (O3) level in Mattoon, Illinois at the moment is 16.426 ppm.
Nitrogen dioxide (NO2) level in Mattoon, Illinois at the moment is 5.144 ppb.
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