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
6.37 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
28.77 μg/m³
0
55
155
255
425
605+
47.78 ppb
0
55
71
86
201
201+
0.91 ppb
0
36
76
186
605
1005+
3.94 ppb
0
54
101
361
1250
2050+
0.13 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Winfield, Illinois
Winfield, Illinois
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AQI 39
Good
6.21μg/m³
PM2.5
27.14μg/m³
PM10
41.70ppb
O3
1.83ppb
SO2
4.65ppb
NO2
0.14ppm
CO
AQI 46
Good
6.41μg/m³
PM2.5
27.07μg/m³
PM10
49.71ppb
O3
1.91ppb
SO2
4.75ppb
NO2
0.14ppm
CO
AQI 42
Good
5.97μg/m³
PM2.5
26.20μg/m³
PM10
45.26ppb
O3
1.89ppb
SO2
4.70ppb
NO2
0.14ppm
CO
AQI 44
Good
6.50μg/m³
PM2.5
27.86μg/m³
PM10
46.74ppb
O3
1.88ppb
SO2
4.69ppb
NO2
0.14ppm
CO
AQI 46
Good
6.46μg/m³
PM2.5
27.02μg/m³
PM10
50.41ppb
O3
1.92ppb
SO2
4.78ppb
NO2
0.14ppm
CO
AQI 41
Good
6.46μg/m³
PM2.5
25.25μg/m³
PM10
44.14ppb
O3
1.89ppb
SO2
4.75ppb
NO2
0.14ppm
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 2026-07-23.
In the last 24 hours, the best air quality in Winfield, Illinois was observed at 06:00:00 on 2026-07-23.
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 6.369 μg/m3.
The PM10 concentration in Winfield, Illinois is 28.775 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Winfield, Illinois is 0.126 ppm.
Currently, Winfield, Illinois has a sulfur dioxide (SO2) concentration of 0.908 ppb.
The current ozone (O3) level in Winfield, Illinois at the moment is 47.785 ppm.
Nitrogen dioxide (NO2) level in Winfield, Illinois at the moment is 3.94 ppb.
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