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)
44
Good
Winfield, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.26 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.59 μg/m³
0
55
155
255
425
605+
46.98 ppb
0
55
71
86
201
201+
0.44 ppb
0
36
76
186
605
1005+
4.94 ppb
0
54
101
361
1250
2050+
0.14 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Winfield, Illinois
Winfield, Illinois
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AQI 44
Good
3.07μg/m³
PM2.5
13.11μg/m³
PM10
48.04ppb
O3
0.43ppb
SO2
4.95ppb
NO2
0.14ppm
CO
AQI 44
Good
3.34μg/m³
PM2.5
14.94μg/m³
PM10
47.85ppb
O3
0.44ppb
SO2
4.96ppb
NO2
0.14ppm
CO
AQI 44
Good
3.08μg/m³
PM2.5
13.64μg/m³
PM10
47.57ppb
O3
0.44ppb
SO2
4.92ppb
NO2
0.14ppm
CO
AQI 44
Good
3.34μg/m³
PM2.5
14.86μg/m³
PM10
47.30ppb
O3
0.44ppb
SO2
4.95ppb
NO2
0.14ppm
CO
AQI 44
Good
3.40μg/m³
PM2.5
15.20μg/m³
PM10
48.20ppb
O3
0.44ppb
SO2
4.97ppb
NO2
0.14ppm
CO
AQI 39
Good
3.31μg/m³
PM2.5
14.70μg/m³
PM10
42.46ppb
O3
0.43ppb
SO2
4.87ppb
NO2
0.15ppm
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 10:00:00 on 2026-06-11.
In the last 24 hours, the best air quality in Winfield, Illinois was observed at 02:00:00 on 2026-06-11.
As of now, the AQI in Winfield, Illinois is 44, indicating Good conditions.
Winfield, Illinois air has the highest levels of O3.
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 3.262 μg/m3.
The PM10 concentration in Winfield, Illinois is 14.585 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Winfield, Illinois is 0.144 ppm.
Currently, Winfield, Illinois has a sulfur dioxide (SO2) concentration of 0.439 ppb.
The current ozone (O3) level in Winfield, Illinois at the moment is 46.978 ppm.
Nitrogen dioxide (NO2) level in Winfield, Illinois at the moment is 4.94 ppb.
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