Stay updated with real-time air quality in West Allis, 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)
26
Good
West Allis, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.46 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
13.42 μg/m³
0
55
155
255
425
605+
27.69 ppb
0
55
71
86
201
201+
0.21 ppb
0
36
76
186
605
1005+
6.32 ppb
0
54
101
361
1250
2050+
0.28 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
West Allis, Wisconsin
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AQI 28
Good
3.94μg/m³
PM2.5
15.54μg/m³
PM10
30.30ppb
O3
0.15ppb
SO2
5.97ppb
NO2
0.29ppm
CO
AQI 29
Good
4.08μg/m³
PM2.5
13.81μg/m³
PM10
30.85ppb
O3
0.17ppb
SO2
8.91ppb
NO2
0.29ppm
CO
AQI 29
Good
4.10μg/m³
PM2.5
13.46μg/m³
PM10
30.95ppb
O3
0.17ppb
SO2
9.42ppb
NO2
0.29ppm
CO
AQI 28
Good
3.85μg/m³
PM2.5
16.34μg/m³
PM10
30.41ppb
O3
0.14ppb
SO2
5.47ppb
NO2
0.29ppm
CO
AQI 30
Good
3.93μg/m³
PM2.5
14.04μg/m³
PM10
31.93ppb
O3
0.18ppb
SO2
6.96ppb
NO2
0.28ppm
CO
AQI 30
Good
4.01μg/m³
PM2.5
12.85μg/m³
PM10
31.68ppb
O3
0.20ppb
SO2
4.86ppb
NO2
0.28ppm
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 West Allis, Wisconsin is updated every hour.
The worst air quality in West Allis, Wisconsin in the last 24 hours was observed at 07:00:00 on 2026-03-10.
In the last 24 hrs, the best air quality in West Allis, Wisconsin was observed at 12:00:00 on 2026-03-10.
The current air quality in West Allis, Wisconsin is 24, categorized as Good based on real-time data.
The most common pollutant in West Allis, Wisconsin is O3.
If the air quality in West Allis, Wisconsin is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at West Allis, Wisconsin is 3.637 μg/m3.
The current PM10 concentration at West Allis, Wisconsin is 14.091 μg/m3.
The current carbon monoxide (CO) concentration at West Allis, Wisconsin is 0.291 ppm.
The current sulfur dioxide (SO2) concentration at West Allis, Wisconsin is 0.143 ppb.
The current ozone (O3) concentration at West Allis, Wisconsin is 25.955 ppm.
The current nitrogen dioxide (NO2) concentration at West Allis, Wisconsin is 7.35 ppb.
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