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)
33
Good
Mount Vernon, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.79 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
19.60 μg/m³
0
55
155
255
425
605+
23.72 ppb
0
55
71
86
201
201+
0.58 ppb
0
36
76
186
605
1005+
3.33 ppb
0
54
101
361
1250
2050+
0.16 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Mount Vernon, Illinois
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AQI 49
Good
8.93μg/m³
PM2.5
40.06μg/m³
PM10
19.90ppb
O3
0.65ppb
SO2
3.48ppb
NO2
0.17ppm
CO
AQI 33
Good
5.92μg/m³
PM2.5
22.69μg/m³
PM10
24.36ppb
O3
0.87ppb
SO2
3.30ppb
NO2
0.16ppm
CO
AQI 33
Good
5.91μg/m³
PM2.5
28.32μg/m³
PM10
24.77ppb
O3
0.88ppb
SO2
3.25ppb
NO2
0.16ppm
CO
AQI 33
Good
5.91μg/m³
PM2.5
21.04μg/m³
PM10
27.20ppb
O3
0.87ppb
SO2
3.38ppb
NO2
0.16ppm
CO
AQI 24
Good
3.95μg/m³
PM2.5
18.66μg/m³
PM10
26.41ppb
O3
0.68ppb
SO2
4.32ppb
NO2
0.16ppm
CO
AQI 24
Good
3.95μg/m³
PM2.5
18.66μg/m³
PM10
26.41ppb
O3
0.68ppb
SO2
4.32ppb
NO2
0.16ppm
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, 2026-09-06.
The best air quality in Mount Vernon, Illinois was observed at 11:00:00 on 2026-09-07.
The air quality in Mount Vernon, Illinois right now is Good, with an AQI of 33.
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 5.792 μg/m3.
Mount Vernon, Illinois currently has a PM10 concentration of 19.601 μg/m3.
The current carbon monoxide (CO) level in Mount Vernon, Illinois is 0.159 ppm.
The current sulfur dioxide (SO2) concentration in Mount Vernon, Illinois is 0.578 ppb.
Mount Vernon, Illinois currently has an ozone (O3) concentration of 23.723 ppm.
The current level of nitrogen dioxide (NO2) in Mount Vernon, Illinois is 3.327 ppb.
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