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)
49
Good
Mattoon, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
9.04 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
39.49 μg/m³
0
55
155
255
425
605+
38.03 ppb
0
55
71
86
201
201+
0.82 ppb
0
36
76
186
605
1005+
3.50 ppb
0
54
101
361
1250
2050+
0.16 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Mattoon, Illinois
Mattoon, Illinois
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AQI 58
Moderate
13.30μg/m³
PM2.5
66.18μg/m³
PM10
37.60ppb
O3
0.66ppb
SO2
5.40ppb
NO2
0.23ppm
CO
AQI 56
Moderate
11.68μg/m³
PM2.5
58.11μg/m³
PM10
37.16ppb
O3
0.75ppb
SO2
7.71ppb
NO2
0.24ppm
CO
AQI 54
Moderate
11.03μg/m³
PM2.5
49.14μg/m³
PM10
47.96ppb
O3
0.86ppb
SO2
12.60ppb
NO2
0.17ppm
CO
AQI 71
Moderate
20.02μg/m³
PM2.5
85.12μg/m³
PM10
45.40ppb
O3
0.72ppb
SO2
3.03ppb
NO2
0.15ppm
CO
AQI 71
Moderate
20.36μg/m³
PM2.5
88.61μg/m³
PM10
45.29ppb
O3
0.69ppb
SO2
2.80ppb
NO2
0.15ppm
CO
AQI 66
Moderate
16.66μg/m³
PM2.5
53.32μg/m³
PM10
45.56ppb
O3
0.85ppb
SO2
5.33ppb
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 01:00:00 on 2025-07-08.
In the last 24 hours, the best air quality in Mattoon, Illinois was observed at 12:00:00 on 2025-07-09.
As of now, the AQI in Mattoon, Illinois is 58, indicating Moderate 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 13.272 μg/m3.
The PM10 concentration in Mattoon, Illinois is 57.662 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Mattoon, Illinois is 0.223 ppm.
Currently, Mattoon, Illinois has a sulfur dioxide (SO2) concentration of 0.646 ppb.
The current ozone (O3) level in Mattoon, Illinois at the moment is 38.377 ppm.
Nitrogen dioxide (NO2) level in Mattoon, Illinois at the moment is 5.64 ppb.
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