Stay updated with real-time air quality in Charleston, 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)
26
Good
Charleston, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
3.72 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.77 μg/m³
0
55
155
255
425
605+
28.35 ppb
0
55
71
86
201
201+
0.78 ppb
0
36
76
186
605
1005+
3.24 ppb
0
54
101
361
1250
2050+
0.12 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Charleston, Illinois
Charleston, Illinois
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AQI 49
Good
8.88μg/m³
PM2.5
37.76μg/m³
PM10
17.59ppb
O3
0.99ppb
SO2
1.30ppb
NO2
0.21ppm
CO
AQI 54
Moderate
10.99μg/m³
PM2.5
46.76μg/m³
PM10
10.19ppb
O3
1.00ppb
SO2
1.32ppb
NO2
0.23ppm
CO
AQI 27
Good
5.48μg/m³
PM2.5
23.55μg/m³
PM10
14.96ppb
O3
0.90ppb
SO2
3.54ppb
NO2
0.31ppm
CO
AQI 22
Good
4.43μg/m³
PM2.5
19.25μg/m³
PM10
21.63ppb
O3
0.96ppb
SO2
2.14ppb
NO2
0.15ppm
CO
AQI 22
Good
4.40μg/m³
PM2.5
19.03μg/m³
PM10
21.61ppb
O3
0.96ppb
SO2
2.13ppb
NO2
0.15ppm
CO
AQI 33
Good
6.38μg/m³
PM2.5
28.92μg/m³
PM10
29.92ppb
O3
1.00ppb
SO2
2.07ppb
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 Charleston, Illinois are available every hour.
Charleston, Illinois experienced its worst air quality at 03:00:00, 2025-07-20.
The best air quality in Charleston, Illinois was observed at 11:00:00 on 2025-07-19.
The air quality in Charleston, Illinois right now is Good, with an AQI of 44.
In Charleston, Illinois, PM2.5 is the most frequently found pollutant.
When air quality in Charleston, Illinois is compromised, staying indoors and wearing a mask can reduce health risks.
Charleston, Illinois currently has a PM2.5 concentration of 7.63 μg/m3.
Charleston, Illinois currently has a PM10 concentration of 30.232 μg/m3.
The current carbon monoxide (CO) level in Charleston, Illinois is 0.236 ppm.
The current sulfur dioxide (SO2) concentration in Charleston, Illinois is 0.842 ppb.
Charleston, Illinois currently has an ozone (O3) concentration of 18.873 ppm.
The current level of nitrogen dioxide (NO2) in Charleston, Illinois is 3.197 ppb.
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