Stay updated with real-time air quality in Greendale, 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)
71
Moderate
Greendale, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
20.30 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
55.50 μg/m³
0
55
155
255
425
605+
22.88 ppb
0
55
71
86
201
201+
0.28 ppb
0
36
76
186
605
1005+
4.24 ppb
0
54
101
361
1250
2050+
0.29 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Greendale, Wisconsin
Greendale, Wisconsin
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AQI 73
Moderate
20.52μg/m³
PM2.5
61.55μg/m³
PM10
22.76ppb
O3
0.27ppb
SO2
4.01ppb
NO2
0.29ppm
CO
AQI 71
Moderate
20.48μg/m³
PM2.5
55.44μg/m³
PM10
22.94ppb
O3
0.29ppb
SO2
4.10ppb
NO2
0.29ppm
CO
AQI 75
Moderate
21.73μg/m³
PM2.5
85.11μg/m³
PM10
22.85ppb
O3
0.25ppb
SO2
3.10ppb
NO2
0.29ppm
CO
AQI 75
Moderate
22.43μg/m³
PM2.5
64.71μg/m³
PM10
22.98ppb
O3
0.33ppb
SO2
3.05ppb
NO2
0.28ppm
CO
AQI 73
Moderate
20.92μg/m³
PM2.5
66.90μg/m³
PM10
23.02ppb
O3
0.27ppb
SO2
3.76ppb
NO2
0.29ppm
CO
AQI 73
Moderate
20.72μg/m³
PM2.5
58.50μg/m³
PM10
23.09ppb
O3
0.29ppb
SO2
3.94ppb
NO2
0.29ppm
CO
Air quality data and pollutant measurements for Wisconsin, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Greendale, Wisconsin is updated every hour.
The worst air quality in Greendale, Wisconsin in the last 24 hours was observed at 03:00:00 on 2026-08-23.
In the last 24 hrs, the best air quality in Greendale, Wisconsin was observed at 09:00:00 on 2026-08-23.
The current air quality in Greendale, Wisconsin is 71, categorized as Moderate based on real-time data.
The most common pollutant in Greendale, Wisconsin is PM2.5.
If the air quality in Greendale, Wisconsin is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Greendale, Wisconsin is 20.3 μg/m3.
The current PM10 concentration at Greendale, Wisconsin is 55.502 μg/m3.
The current carbon monoxide (CO) concentration at Greendale, Wisconsin is 0.295 ppm.
The current sulfur dioxide (SO2) concentration at Greendale, Wisconsin is 0.284 ppb.
The current ozone (O3) concentration at Greendale, Wisconsin is 22.884 ppm.
The current nitrogen dioxide (NO2) concentration at Greendale, Wisconsin is 4.239 ppb.
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