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)
31
Good
Greendale, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.62 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
10.40 μg/m³
0
55
155
255
425
605+
33.89 ppb
0
55
71
86
201
201+
0.15 ppb
0
36
76
186
605
1005+
2.57 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Greendale, Wisconsin
Greendale, Wisconsin
Scroll To Air Quality MapLoading...
AQI 31
Good
3.68μg/m³
PM2.5
11.16μg/m³
PM10
33.74ppb
O3
0.14ppb
SO2
2.52ppb
NO2
0.20ppm
CO
AQI 31
Good
3.63μg/m³
PM2.5
10.55μg/m³
PM10
33.85ppb
O3
0.15ppb
SO2
2.52ppb
NO2
0.19ppm
CO
AQI 31
Good
3.88μg/m³
PM2.5
14.16μg/m³
PM10
33.50ppb
O3
0.14ppb
SO2
2.28ppb
NO2
0.19ppm
CO
AQI 31
Good
3.84μg/m³
PM2.5
13.03μg/m³
PM10
32.76ppb
O3
0.17ppb
SO2
2.19ppb
NO2
0.18ppm
CO
AQI 31
Good
3.70μg/m³
PM2.5
12.24μg/m³
PM10
33.87ppb
O3
0.14ppb
SO2
2.44ppb
NO2
0.19ppm
CO
AQI 31
Good
3.63μg/m³
PM2.5
11.59μg/m³
PM10
33.98ppb
O3
0.14ppb
SO2
2.48ppb
NO2
0.19ppm
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 11:00:00 on 2026-04-27.
In the last 24 hrs, the best air quality in Greendale, Wisconsin was observed at 08:00:00 on 2026-04-28.
The current air quality in Greendale, Wisconsin is 31, categorized as Good based on real-time data.
The most common pollutant in Greendale, Wisconsin is O3.
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 3.62 μg/m3.
The current PM10 concentration at Greendale, Wisconsin is 10.402 μg/m3.
The current carbon monoxide (CO) concentration at Greendale, Wisconsin is 0.196 ppm.
The current sulfur dioxide (SO2) concentration at Greendale, Wisconsin is 0.146 ppb.
The current ozone (O3) concentration at Greendale, Wisconsin is 33.886 ppm.
The current nitrogen dioxide (NO2) concentration at Greendale, Wisconsin is 2.568 ppb.
All Rights Reserved © Ambee Inc. 2025