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)
51
Moderate
Swansea, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.63 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
31.53 μg/m³
0
55
155
255
425
605+
54.52 ppb
0
55
71
86
201
201+
1.89 ppb
0
36
76
186
605
1005+
5.26 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Swansea, Illinois
Swansea, Illinois
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AQI 50
Good
7.51μg/m³
PM2.5
39.07μg/m³
PM10
54.35ppb
O3
1.82ppb
SO2
5.18ppb
NO2
0.19ppm
CO
AQI 54
Moderate
7.68μg/m³
PM2.5
31.49μg/m³
PM10
56.17ppb
O3
1.90ppb
SO2
5.26ppb
NO2
0.20ppm
CO
AQI 51
Moderate
7.03μg/m³
PM2.5
36.11μg/m³
PM10
55.02ppb
O3
1.75ppb
SO2
5.07ppb
NO2
0.19ppm
CO
AQI 51
Moderate
7.03μg/m³
PM2.5
36.11μg/m³
PM10
55.02ppb
O3
1.75ppb
SO2
5.07ppb
NO2
0.19ppm
CO
AQI 54
Moderate
8.07μg/m³
PM2.5
45.51μg/m³
PM10
55.89ppb
O3
1.97ppb
SO2
5.56ppb
NO2
0.20ppm
CO
AQI 52
Moderate
10.03μg/m³
PM2.5
45.24μg/m³
PM10
48.14ppb
O3
2.29ppb
SO2
7.28ppb
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 02:00:00 on 2026-10-22.
In the last 24 hrs, the best air quality in Swansea, Illinois was observed at 12:00:00 on 2026-10-22.
The current air quality in Swansea, Illinois is 51, categorized as Moderate 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 7.632 μg/m3.
The current PM10 concentration at Swansea, Illinois is 31.528 μg/m3.
The current carbon monoxide (CO) concentration at Swansea, Illinois is 0.195 ppm.
The current sulfur dioxide (SO2) concentration at Swansea, Illinois is 1.885 ppb.
The current ozone (O3) concentration at Swansea, Illinois is 54.523 ppm.
The current nitrogen dioxide (NO2) concentration at Swansea, Illinois is 5.26 ppb.
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