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
8.48 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
37.47 μg/m³
0
55
155
255
425
605+
26.22 ppb
0
55
71
86
201
201+
0.64 ppb
0
36
76
186
605
1005+
11.65 ppb
0
54
101
361
1250
2050+
0.30 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Winfield, Illinois
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AQI 22
Good
3.82μg/m³
PM2.5
16.91μg/m³
PM10
18.40ppb
O3
1.34ppb
SO2
14.80ppb
NO2
0.22ppm
CO
AQI 22
Good
3.83μg/m³
PM2.5
16.85μg/m³
PM10
15.91ppb
O3
1.51ppb
SO2
17.90ppb
NO2
0.23ppm
CO
AQI 22
Good
4.04μg/m³
PM2.5
17.43μg/m³
PM10
18.71ppb
O3
1.28ppb
SO2
13.90ppb
NO2
0.22ppm
CO
AQI 17
Good
3.50μg/m³
PM2.5
15.16μg/m³
PM10
17.24ppb
O3
1.52ppb
SO2
17.96ppb
NO2
0.23ppm
CO
AQI 22
Good
3.84μg/m³
PM2.5
16.88μg/m³
PM10
15.69ppb
O3
1.59ppb
SO2
19.16ppb
NO2
0.23ppm
CO
AQI 20
Good
3.38μg/m³
PM2.5
14.98μg/m³
PM10
16.59ppb
O3
1.69ppb
SO2
20.75ppb
NO2
0.24ppm
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 02:00:00 on 2026-03-10.
In the last 24 hours, the best air quality in Winfield, Illinois was observed at 05:00:00 on 2026-03-09.
As of now, the AQI in Winfield, Illinois is 44, 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 8.484 μg/m3.
The PM10 concentration in Winfield, Illinois is 37.472 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Winfield, Illinois is 0.303 ppm.
Currently, Winfield, Illinois has a sulfur dioxide (SO2) concentration of 0.641 ppb.
The current ozone (O3) level in Winfield, Illinois at the moment is 26.224 ppm.
Nitrogen dioxide (NO2) level in Winfield, Illinois at the moment is 11.652 ppb.
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