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

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.76 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
25.66 μg/m³
0
55
155
255
425
605+
32.70 ppb
0
55
71
86
201
201+
0.75 ppb
0
36
76
186
605
1005+
17.55 ppb
0
54
101
361
1250
2050+
0.41 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Swansea, Illinois
Swansea, Illinois
Scroll To Air Quality MapLoading...
AQI 33
Good
5.99μg/m³
PM2.5
26.14μg/m³
PM10
35.69ppb
O3
0.76ppb
SO2
17.79ppb
NO2
0.40ppm
CO
AQI 33
Good
5.98μg/m³
PM2.5
25.80μg/m³
PM10
32.70ppb
O3
0.75ppb
SO2
17.52ppb
NO2
0.41ppm
CO
AQI 38
Good
7.19μg/m³
PM2.5
38.02μg/m³
PM10
36.50ppb
O3
0.73ppb
SO2
17.28ppb
NO2
0.39ppm
CO
AQI 38
Good
7.19μg/m³
PM2.5
38.02μg/m³
PM10
36.50ppb
O3
0.73ppb
SO2
17.28ppb
NO2
0.39ppm
CO
AQI 44
Good
8.20μg/m³
PM2.5
27.60μg/m³
PM10
35.08ppb
O3
0.73ppb
SO2
16.85ppb
NO2
0.41ppm
CO
AQI 38
Good
6.81μg/m³
PM2.5
30.20μg/m³
PM10
25.05ppb
O3
0.71ppb
SO2
14.93ppb
NO2
0.44ppm
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 10:00:00 on 2026-10-05.
In the last 24 hrs, the best air quality in Swansea, Illinois was observed at 01:00:00 on 2026-10-05.
The current air quality in Swansea, Illinois is 33, categorized as Good based on real-time data.
The most common pollutant in Swansea, Illinois is PM2.5.
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 5.759 μg/m3.
The current PM10 concentration at Swansea, Illinois is 25.657 μg/m3.
The current carbon monoxide (CO) concentration at Swansea, Illinois is 0.405 ppm.
The current sulfur dioxide (SO2) concentration at Swansea, Illinois is 0.75 ppb.
The current ozone (O3) concentration at Swansea, Illinois is 32.696 ppm.
The current nitrogen dioxide (NO2) concentration at Swansea, Illinois is 17.552 ppb.
All Rights Reserved © Ambee Inc. 2025