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)
64
Moderate
Mattoon, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
15.60 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
48.03 μg/m³
0
55
155
255
425
605+
20.48 ppb
0
55
71
86
201
201+
1.26 ppb
0
36
76
186
605
1005+
3.96 ppb
0
54
101
361
1250
2050+
0.25 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Mattoon, Illinois
Mattoon, Illinois
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AQI 44
Good
4.22μg/m³
PM2.5
16.97μg/m³
PM10
46.83ppb
O3
1.36ppb
SO2
1.82ppb
NO2
0.15ppm
CO
AQI 40
Good
3.92μg/m³
PM2.5
17.03μg/m³
PM10
43.03ppb
O3
1.12ppb
SO2
1.85ppb
NO2
0.17ppm
CO
AQI 41
Good
3.51μg/m³
PM2.5
16.03μg/m³
PM10
44.03ppb
O3
1.08ppb
SO2
1.82ppb
NO2
0.14ppm
CO
AQI 42
Good
3.85μg/m³
PM2.5
17.10μg/m³
PM10
44.93ppb
O3
1.33ppb
SO2
1.82ppb
NO2
0.12ppm
CO
AQI 42
Good
3.81μg/m³
PM2.5
17.02μg/m³
PM10
44.90ppb
O3
1.33ppb
SO2
1.79ppb
NO2
0.12ppm
CO
AQI 44
Good
3.95μg/m³
PM2.5
15.71μg/m³
PM10
47.05ppb
O3
1.35ppb
SO2
1.78ppb
NO2
0.12ppm
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 2025-09-02.
In the last 24 hours, the best air quality in Mattoon, Illinois was observed at 06:00:00 on 2025-09-02.
As of now, the AQI in Mattoon, Illinois is 43, 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 4.77 μg/m3.
The PM10 concentration in Mattoon, Illinois is 22.881 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Mattoon, Illinois is 0.163 ppm.
Currently, Mattoon, Illinois has a sulfur dioxide (SO2) concentration of 1.136 ppb.
The current ozone (O3) level in Mattoon, Illinois at the moment is 45.803 ppm.
Nitrogen dioxide (NO2) level in Mattoon, Illinois at the moment is 2.083 ppb.
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