Stay updated with real-time air quality in Winfield, 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)
38
Good
Winfield, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.65 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
28.96 μg/m³
0
55
155
255
425
605+
9.51 ppb
0
55
71
86
201
201+
1.85 ppb
0
36
76
186
605
1005+
5.48 ppb
0
54
101
361
1250
2050+
0.22 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Winfield, Illinois
Winfield, Illinois
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AQI 33
Good
6.09μg/m³
PM2.5
24.63μg/m³
PM10
14.39ppb
O3
1.74ppb
SO2
5.51ppb
NO2
0.23ppm
CO
AQI 38
Good
6.56μg/m³
PM2.5
28.41μg/m³
PM10
7.73ppb
O3
1.86ppb
SO2
5.49ppb
NO2
0.22ppm
CO
AQI 33
Good
6.45μg/m³
PM2.5
28.10μg/m³
PM10
11.24ppb
O3
1.84ppb
SO2
5.45ppb
NO2
0.22ppm
CO
AQI 33
Good
6.49μg/m³
PM2.5
28.21μg/m³
PM10
9.50ppb
O3
1.82ppb
SO2
5.52ppb
NO2
0.23ppm
CO
AQI 38
Good
6.50μg/m³
PM2.5
28.10μg/m³
PM10
7.05ppb
O3
1.87ppb
SO2
5.53ppb
NO2
0.23ppm
CO
AQI 27
Good
5.33μg/m³
PM2.5
25.65μg/m³
PM10
14.46ppb
O3
1.76ppb
SO2
5.67ppb
NO2
0.23ppm
CO
Air quality and pollutant data for Illinois, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Winfield, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Winfield, Illinois was at its worst at 03:00:00 on 2026-09-07.
In the last 24 hours, the best air quality in Winfield, Illinois was observed at 01:00:00 on 2026-09-06.
As of now, the AQI in Winfield, Illinois is 38, indicating Good conditions.
Winfield, Illinois air has the highest levels of PM2.5.
Poor air quality in Winfield, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Winfield, Illinois are currently 6.652 μg/m3.
The PM10 concentration in Winfield, Illinois is 28.956 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Winfield, Illinois is 0.224 ppm.
Currently, Winfield, Illinois has a sulfur dioxide (SO2) concentration of 1.851 ppb.
The current ozone (O3) level in Winfield, Illinois at the moment is 9.506 ppm.
Nitrogen dioxide (NO2) level in Winfield, Illinois at the moment is 5.476 ppb.
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