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)
19
Good
Mattoon, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
2.63 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
12.70 μg/m³
0
55
155
255
425
605+
20.28 ppb
0
55
71
86
201
201+
0.59 ppb
0
36
76
186
605
1005+
3.41 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 19
Good
2.57μg/m³
PM2.5
12.29μg/m³
PM10
20.24ppb
O3
0.57ppb
SO2
2.50ppb
NO2
0.17ppm
CO
AQI 19
Good
2.70μg/m³
PM2.5
13.00μg/m³
PM10
20.01ppb
O3
0.63ppb
SO2
3.45ppb
NO2
0.17ppm
CO
AQI 19
Good
3.29μg/m³
PM2.5
14.95μg/m³
PM10
20.03ppb
O3
0.65ppb
SO2
3.75ppb
NO2
0.13ppm
CO
AQI 19
Good
2.61μg/m³
PM2.5
11.03μg/m³
PM10
21.08ppb
O3
0.62ppb
SO2
2.38ppb
NO2
0.13ppm
CO
AQI 19
Good
2.60μg/m³
PM2.5
11.01μg/m³
PM10
21.10ppb
O3
0.62ppb
SO2
2.37ppb
NO2
0.13ppm
CO
AQI 19
Good
2.44μg/m³
PM2.5
10.15μg/m³
PM10
20.80ppb
O3
0.63ppb
SO2
2.62ppb
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 10:00:00 on 2025-10-21.
In the last 24 hours, the best air quality in Mattoon, Illinois was observed at 10:00:00 on 2025-10-22.
As of now, the AQI in Mattoon, Illinois is 19, indicating Good conditions.
Mattoon, Illinois air has the highest levels of O3.
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 2.63 μg/m3.
The PM10 concentration in Mattoon, Illinois is 12.698 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Mattoon, Illinois is 0.164 ppm.
Currently, Mattoon, Illinois has a sulfur dioxide (SO2) concentration of 0.587 ppb.
The current ozone (O3) level in Mattoon, Illinois at the moment is 20.277 ppm.
Nitrogen dioxide (NO2) level in Mattoon, Illinois at the moment is 3.412 ppb.
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