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)
46
Good
Mount Vernon, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.52 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
31.09 μg/m³
0
55
155
255
425
605+
50.35 ppb
0
55
71
86
201
201+
2.53 ppb
0
36
76
186
605
1005+
5.79 ppb
0
54
101
361
1250
2050+
0.18 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Mount Vernon, Illinois
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AQI 54
Moderate
6.30μg/m³
PM2.5
29.12μg/m³
PM10
56.28ppb
O3
1.42ppb
SO2
2.71ppb
NO2
0.16ppm
CO
AQI 49
Good
6.07μg/m³
PM2.5
27.02μg/m³
PM10
53.41ppb
O3
2.62ppb
SO2
5.98ppb
NO2
0.18ppm
CO
AQI 48
Good
6.04μg/m³
PM2.5
28.85μg/m³
PM10
52.35ppb
O3
2.86ppb
SO2
6.41ppb
NO2
0.18ppm
CO
AQI 54
Moderate
6.22μg/m³
PM2.5
30.29μg/m³
PM10
55.88ppb
O3
2.63ppb
SO2
6.03ppb
NO2
0.18ppm
CO
AQI 46
Good
7.59μg/m³
PM2.5
33.02μg/m³
PM10
50.32ppb
O3
2.24ppb
SO2
7.07ppb
NO2
0.19ppm
CO
AQI 46
Good
7.59μg/m³
PM2.5
33.02μg/m³
PM10
50.32ppb
O3
2.24ppb
SO2
7.07ppb
NO2
0.19ppm
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 03:00:00, 2026-10-22.
The best air quality in Mount Vernon, Illinois was observed at 09:00:00 on 2026-10-22.
The air quality in Mount Vernon, Illinois right now is Good, with an AQI of 46.
In Mount Vernon, Illinois, O3 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 6.521 μg/m3.
Mount Vernon, Illinois currently has a PM10 concentration of 31.085 μg/m3.
The current carbon monoxide (CO) level in Mount Vernon, Illinois is 0.182 ppm.
The current sulfur dioxide (SO2) concentration in Mount Vernon, Illinois is 2.531 ppb.
Mount Vernon, Illinois currently has an ozone (O3) concentration of 50.355 ppm.
The current level of nitrogen dioxide (NO2) in Mount Vernon, Illinois is 5.792 ppb.
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