Stay updated with real-time air quality in Greenfield, Wisconsin 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)
62
Moderate
Greenfield, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
14.72 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
38.40 μg/m³
0
55
155
255
425
605+
19.71 ppb
0
55
71
86
201
201+
0.25 ppb
0
36
76
186
605
1005+
14.23 ppb
0
54
101
361
1250
2050+
0.29 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Greenfield, Wisconsin
Greenfield, Wisconsin
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AQI 62
Moderate
14.57μg/m³
PM2.5
34.62μg/m³
PM10
19.64ppb
O3
0.25ppb
SO2
15.05ppb
NO2
0.29ppm
CO
AQI 62
Moderate
15.00μg/m³
PM2.5
51.12μg/m³
PM10
19.90ppb
O3
0.24ppb
SO2
10.69ppb
NO2
0.28ppm
CO
AQI 60
Moderate
13.91μg/m³
PM2.5
39.40μg/m³
PM10
20.08ppb
O3
0.27ppb
SO2
11.22ppb
NO2
0.26ppm
CO
AQI 60
Moderate
14.47μg/m³
PM2.5
34.27μg/m³
PM10
19.62ppb
O3
0.25ppb
SO2
14.47ppb
NO2
0.29ppm
CO
AQI 62
Moderate
15.01μg/m³
PM2.5
54.23μg/m³
PM10
20.11ppb
O3
0.24ppb
SO2
9.69ppb
NO2
0.28ppm
CO
AQI 62
Moderate
15.36μg/m³
PM2.5
62.27μg/m³
PM10
20.08ppb
O3
0.23ppb
SO2
9.35ppb
NO2
0.28ppm
CO
Air quality measurements for Wisconsin, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for Greenfield, Wisconsin is updated on an hourly basis.
The worst air quality in Greenfield, Wisconsin was recorded at 08:00:00 on 2026-07-11.
The best air quality in Greenfield, Wisconsin was recorded at 07:00:00 on 2026-07-10.
The real-time air quality index in Greenfield, Wisconsin is 62, currently categorized as Moderate.
The most common pollutant in Greenfield, Wisconsin is PM2.5.
If the air quality in Greenfield, Wisconsin is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Greenfield, Wisconsin at present are 14.721 μg/m3.
The current PM10 levels in Greenfield, Wisconsin are 38.399 μg/m3.
The current carbon monoxide (CO) level in Greenfield, Wisconsin is 0.288 ppm.
The current sulfur dioxide (SO2) levels in Greenfield, Wisconsin are 0.247 ppb.
The current ozone (O3) levels at Greenfield, Wisconsin is 19.712 ppm.
The current nitrogen dioxide (NO2) levels at Greenfield, Wisconsin is 14.226 ppb.
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