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)
54
Moderate
Winfield, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
11.15 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
49.10 μg/m³
0
55
155
255
425
605+
37.74 ppb
0
55
71
86
201
201+
1.67 ppb
0
36
76
186
605
1005+
5.80 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Winfield, Illinois
Winfield, Illinois
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AQI 54
Moderate
11.24μg/m³
PM2.5
53.26μg/m³
PM10
41.31ppb
O3
0.99ppb
SO2
27.27ppb
NO2
0.36ppm
CO
AQI 54
Moderate
11.04μg/m³
PM2.5
50.16μg/m³
PM10
33.32ppb
O3
1.03ppb
SO2
20.69ppb
NO2
0.36ppm
CO
AQI 54
Moderate
10.50μg/m³
PM2.5
47.37μg/m³
PM10
36.84ppb
O3
1.00ppb
SO2
23.88ppb
NO2
0.36ppm
CO
AQI 54
Moderate
10.87μg/m³
PM2.5
48.56μg/m³
PM10
34.05ppb
O3
1.01ppb
SO2
22.21ppb
NO2
0.36ppm
CO
AQI 56
Moderate
11.53μg/m³
PM2.5
52.45μg/m³
PM10
31.08ppb
O3
1.05ppb
SO2
19.58ppb
NO2
0.36ppm
CO
AQI 56
Moderate
12.49μg/m³
PM2.5
45.41μg/m³
PM10
29.45ppb
O3
1.07ppb
SO2
18.63ppb
NO2
0.36ppm
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 01:00:00 on 2026-10-22.
In the last 24 hours, the best air quality in Winfield, Illinois was observed at 10:00:00 on 2026-10-21.
As of now, the AQI in Winfield, Illinois is 54, indicating Moderate 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 11.155 μg/m3.
The PM10 concentration in Winfield, Illinois is 49.097 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Winfield, Illinois is 0.211 ppm.
Currently, Winfield, Illinois has a sulfur dioxide (SO2) concentration of 1.668 ppb.
The current ozone (O3) level in Winfield, Illinois at the moment is 37.742 ppm.
Nitrogen dioxide (NO2) level in Winfield, Illinois at the moment is 5.803 ppb.
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