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)
27
Good
Greenfield, Wisconsin
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
4.72 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
12.85 μg/m³
0
55
155
255
425
605+
21.42 ppb
0
55
71
86
201
201+
0.59 ppb
0
36
76
186
605
1005+
5.78 ppb
0
54
101
361
1250
2050+
0.29 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Greenfield, Wisconsin
Greenfield, Wisconsin
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AQI 27
Good
4.58μg/m³
PM2.5
11.86μg/m³
PM10
21.99ppb
O3
0.60ppb
SO2
5.85ppb
NO2
0.29ppm
CO
AQI 27
Good
5.27μg/m³
PM2.5
16.91μg/m³
PM10
19.96ppb
O3
0.58ppb
SO2
5.48ppb
NO2
0.29ppm
CO
AQI 38
Good
7.15μg/m³
PM2.5
21.04μg/m³
PM10
23.53ppb
O3
0.63ppb
SO2
5.95ppb
NO2
0.28ppm
CO
AQI 27
Good
4.81μg/m³
PM2.5
12.19μg/m³
PM10
22.00ppb
O3
0.60ppb
SO2
5.85ppb
NO2
0.29ppm
CO
AQI 27
Good
5.11μg/m³
PM2.5
17.60μg/m³
PM10
19.86ppb
O3
0.57ppb
SO2
5.30ppb
NO2
0.28ppm
CO
AQI 27
Good
4.80μg/m³
PM2.5
19.37μg/m³
PM10
19.35ppb
O3
0.56ppb
SO2
5.13ppb
NO2
0.29ppm
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 11:00:00 on 2025-09-03.
The best air quality in Greenfield, Wisconsin was recorded at 01:00:00 on 2025-09-04.
The real-time air quality index in Greenfield, Wisconsin is 22, currently categorized as Good.
The most common pollutant in Greenfield, Wisconsin is O3.
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 1.249 μg/m3.
The current PM10 levels in Greenfield, Wisconsin are 4.998 μg/m3.
The current carbon monoxide (CO) level in Greenfield, Wisconsin is 0.174 ppm.
The current sulfur dioxide (SO2) levels in Greenfield, Wisconsin are 0.596 ppb.
The current ozone (O3) levels at Greenfield, Wisconsin is 24.046 ppm.
The current nitrogen dioxide (NO2) levels at Greenfield, Wisconsin is 2.719 ppb.
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