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)
18
Good
Mount Vernon, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
2.99 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
12.88 μg/m³
0
55
155
255
425
605+
19.08 ppb
0
55
71
86
201
201+
0.62 ppb
0
36
76
186
605
1005+
2.78 ppb
0
54
101
361
1250
2050+
0.17 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Mount Vernon, Illinois
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AQI 19
Good
3.04μg/m³
PM2.5
14.18μg/m³
PM10
20.10ppb
O3
0.56ppb
SO2
2.95ppb
NO2
0.15ppm
CO
AQI 20
Good
2.90μg/m³
PM2.5
13.40μg/m³
PM10
21.80ppb
O3
0.60ppb
SO2
2.81ppb
NO2
0.16ppm
CO
AQI 19
Good
2.88μg/m³
PM2.5
13.56μg/m³
PM10
20.36ppb
O3
0.62ppb
SO2
2.77ppb
NO2
0.16ppm
CO
AQI 20
Good
2.88μg/m³
PM2.5
10.69μg/m³
PM10
22.11ppb
O3
0.79ppb
SO2
3.77ppb
NO2
0.16ppm
CO
AQI 21
Good
2.46μg/m³
PM2.5
14.84μg/m³
PM10
22.99ppb
O3
0.55ppb
SO2
3.69ppb
NO2
0.15ppm
CO
AQI 21
Good
2.46μg/m³
PM2.5
14.84μg/m³
PM10
22.99ppb
O3
0.55ppb
SO2
3.69ppb
NO2
0.15ppm
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 10:00:00, 2025-10-21.
The best air quality in Mount Vernon, Illinois was observed at 10:00:00 on 2025-10-22.
The air quality in Mount Vernon, Illinois right now is Good, with an AQI of 18.
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 2.986 μg/m3.
Mount Vernon, Illinois currently has a PM10 concentration of 12.884 μg/m3.
The current carbon monoxide (CO) level in Mount Vernon, Illinois is 0.173 ppm.
The current sulfur dioxide (SO2) concentration in Mount Vernon, Illinois is 0.619 ppb.
Mount Vernon, Illinois currently has an ozone (O3) concentration of 19.08 ppm.
The current level of nitrogen dioxide (NO2) in Mount Vernon, Illinois is 2.778 ppb.
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