Stay updated with real-time air quality in Swansea, 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)
39
Good
Swansea, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.41 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
25.68 μg/m³
0
55
155
255
425
605+
41.84 ppb
0
55
71
86
201
201+
1.11 ppb
0
36
76
186
605
1005+
3.26 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Swansea, Illinois
Swansea, Illinois
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AQI 39
Good
5.47μg/m³
PM2.5
18.06μg/m³
PM10
41.86ppb
O3
1.06ppb
SO2
3.19ppb
NO2
0.20ppm
CO
AQI 40
Good
6.52μg/m³
PM2.5
29.93μg/m³
PM10
43.08ppb
O3
1.14ppb
SO2
3.28ppb
NO2
0.20ppm
CO
AQI 40
Good
5.55μg/m³
PM2.5
17.94μg/m³
PM10
43.08ppb
O3
1.06ppb
SO2
3.16ppb
NO2
0.20ppm
CO
AQI 40
Good
5.55μg/m³
PM2.5
17.94μg/m³
PM10
43.08ppb
O3
1.06ppb
SO2
3.16ppb
NO2
0.20ppm
CO
AQI 42
Good
6.38μg/m³
PM2.5
25.62μg/m³
PM10
45.08ppb
O3
1.16ppb
SO2
3.33ppb
NO2
0.20ppm
CO
AQI 43
Good
6.81μg/m³
PM2.5
29.98μg/m³
PM10
46.01ppb
O3
1.38ppb
SO2
3.75ppb
NO2
0.20ppm
CO
Air quality data and pollutant measurements for Illinois, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Swansea, Illinois is updated every hour.
The worst air quality in Swansea, Illinois in the last 24 hours was observed at 12:00:00 on 2026-07-23.
In the last 24 hrs, the best air quality in Swansea, Illinois was observed at 03:00:00 on 2026-07-23.
The current air quality in Swansea, Illinois is 39, categorized as Good based on real-time data.
The most common pollutant in Swansea, Illinois is O3.
If the air quality in Swansea, Illinois is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Swansea, Illinois is 6.411 μg/m3.
The current PM10 concentration at Swansea, Illinois is 25.68 μg/m3.
The current carbon monoxide (CO) concentration at Swansea, Illinois is 0.198 ppm.
The current sulfur dioxide (SO2) concentration at Swansea, Illinois is 1.108 ppb.
The current ozone (O3) concentration at Swansea, Illinois is 41.844 ppm.
The current nitrogen dioxide (NO2) concentration at Swansea, Illinois is 3.256 ppb.
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