Stay updated with real-time air quality in Oswego, 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)
42
Good
Oswego, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.08 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.57 μg/m³
0
55
155
255
425
605+
44.83 ppb
0
55
71
86
201
201+
0.43 ppb
0
36
76
186
605
1005+
4.75 ppb
0
54
101
361
1250
2050+
0.14 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Oswego, Illinois
Oswego, Illinois
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AQI 42
Good
3.02μg/m³
PM2.5
13.09μg/m³
PM10
44.62ppb
O3
0.39ppb
SO2
3.13ppb
NO2
0.16ppm
CO
AQI 42
Good
2.96μg/m³
PM2.5
12.85μg/m³
PM10
44.51ppb
O3
0.38ppb
SO2
3.12ppb
NO2
0.16ppm
CO
AQI 43
Good
3.00μg/m³
PM2.5
15.11μg/m³
PM10
45.75ppb
O3
0.37ppb
SO2
2.98ppb
NO2
0.16ppm
CO
AQI 41
Good
2.98μg/m³
PM2.5
12.91μg/m³
PM10
44.45ppb
O3
0.38ppb
SO2
3.12ppb
NO2
0.16ppm
CO
AQI 42
Good
3.04μg/m³
PM2.5
13.10μg/m³
PM10
45.38ppb
O3
0.39ppb
SO2
3.16ppb
NO2
0.16ppm
CO
AQI 42
Good
3.02μg/m³
PM2.5
15.59μg/m³
PM10
44.80ppb
O3
0.36ppb
SO2
2.96ppb
NO2
0.16ppm
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 Oswego, Illinois are available every hour.
Oswego, Illinois experienced its worst air quality at 09:00:00, 2026-06-11.
The best air quality in Oswego, Illinois was observed at 02:00:00 on 2026-06-11.
The air quality in Oswego, Illinois right now is Good, with an AQI of 42.
In Oswego, Illinois, O3 is the most frequently found pollutant.
When air quality in Oswego, Illinois is compromised, staying indoors and wearing a mask can reduce health risks.
Oswego, Illinois currently has a PM2.5 concentration of 3.083 μg/m3.
Oswego, Illinois currently has a PM10 concentration of 14.57 μg/m3.
The current carbon monoxide (CO) level in Oswego, Illinois is 0.141 ppm.
The current sulfur dioxide (SO2) concentration in Oswego, Illinois is 0.43 ppb.
Oswego, Illinois currently has an ozone (O3) concentration of 44.83 ppm.
The current level of nitrogen dioxide (NO2) in Oswego, Illinois is 4.747 ppb.
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