Stay updated with real-time air quality in Mount Vernon, 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
Mount Vernon, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.95 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
26.43 μg/m³
0
55
155
255
425
605+
13.88 ppb
0
55
71
86
201
201+
1.14 ppb
0
36
76
186
605
1005+
26.32 ppb
0
54
101
361
1250
2050+
0.46 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Mount Vernon, Illinois
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AQI 44
Good
8.24μg/m³
PM2.5
30.77μg/m³
PM10
15.44ppb
O3
1.19ppb
SO2
19.06ppb
NO2
0.33ppm
CO
AQI 27
Good
5.39μg/m³
PM2.5
21.72μg/m³
PM10
16.27ppb
O3
1.20ppb
SO2
25.00ppb
NO2
0.39ppm
CO
AQI 28
Good
5.41μg/m³
PM2.5
18.62μg/m³
PM10
16.31ppb
O3
1.22ppb
SO2
30.07ppb
NO2
0.40ppm
CO
AQI 38
Good
7.49μg/m³
PM2.5
32.86μg/m³
PM10
17.78ppb
O3
1.10ppb
SO2
11.14ppb
NO2
0.30ppm
CO
AQI 44
Good
8.24μg/m³
PM2.5
35.22μg/m³
PM10
12.41ppb
O3
0.81ppb
SO2
23.99ppb
NO2
0.34ppm
CO
AQI 44
Good
8.24μg/m³
PM2.5
35.22μg/m³
PM10
12.41ppb
O3
0.81ppb
SO2
23.99ppb
NO2
0.34ppm
CO
The air quality data for Illinois, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for Mount Vernon, Illinois are available every hour.
Mount Vernon, Illinois experienced its worst air quality at 04:00:00, 2026-01-22.
The best air quality in Mount Vernon, Illinois was observed at 11:00:00 on 2026-01-22.
The air quality in Mount Vernon, Illinois right now is Good, with an AQI of 38.
In Mount Vernon, Illinois, PM2.5 is the most frequently found pollutant.
When air quality in Mount Vernon, Illinois is compromised, staying indoors and wearing a mask can reduce health risks.
Mount Vernon, Illinois currently has a PM2.5 concentration of 6.949 μg/m3.
Mount Vernon, Illinois currently has a PM10 concentration of 26.433 μg/m3.
The current carbon monoxide (CO) level in Mount Vernon, Illinois is 0.456 ppm.
The current sulfur dioxide (SO2) concentration in Mount Vernon, Illinois is 1.136 ppb.
Mount Vernon, Illinois currently has an ozone (O3) concentration of 13.88 ppm.
The current level of nitrogen dioxide (NO2) in Mount Vernon, Illinois is 26.32 ppb.
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