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)
60
Moderate
Mattoon, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
13.92 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
62.44 μg/m³
0
55
155
255
425
605+
12.34 ppb
0
55
71
86
201
201+
0.81 ppb
0
36
76
186
605
1005+
4.30 ppb
0
54
101
361
1250
2050+
0.22 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Mattoon, Illinois
Mattoon, Illinois
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AQI 60
Moderate
14.19μg/m³
PM2.5
61.06μg/m³
PM10
11.95ppb
O3
1.19ppb
SO2
5.35ppb
NO2
0.22ppm
CO
AQI 62
Moderate
15.34μg/m³
PM2.5
69.00μg/m³
PM10
13.86ppb
O3
0.60ppb
SO2
3.97ppb
NO2
0.21ppm
CO
AQI 66
Moderate
16.80μg/m³
PM2.5
74.99μg/m³
PM10
15.21ppb
O3
0.78ppb
SO2
8.29ppb
NO2
0.18ppm
CO
AQI 69
Moderate
18.85μg/m³
PM2.5
82.78μg/m³
PM10
18.53ppb
O3
0.68ppb
SO2
8.70ppb
NO2
0.13ppm
CO
AQI 69
Moderate
18.89μg/m³
PM2.5
82.97μg/m³
PM10
18.50ppb
O3
0.67ppb
SO2
8.75ppb
NO2
0.13ppm
CO
AQI 66
Moderate
17.48μg/m³
PM2.5
62.18μg/m³
PM10
14.67ppb
O3
0.67ppb
SO2
8.84ppb
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 09:00:00 on 2025-12-07.
In the last 24 hours, the best air quality in Mattoon, Illinois was observed at 03:00:00 on 2025-12-07.
As of now, the AQI in Mattoon, Illinois is 60, 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 13.917 μg/m3.
The PM10 concentration in Mattoon, Illinois is 62.439 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Mattoon, Illinois is 0.217 ppm.
Currently, Mattoon, Illinois has a sulfur dioxide (SO2) concentration of 0.806 ppb.
The current ozone (O3) level in Mattoon, Illinois at the moment is 12.336 ppm.
Nitrogen dioxide (NO2) level in Mattoon, Illinois at the moment is 4.296 ppb.
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