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)
27
Good
West Allis, Wisconsin
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
5.27 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.91 μg/m³
0
55
155
255
425
605+
19.96 ppb
0
55
71
86
201
201+
0.58 ppb
0
36
76
186
605
1005+
5.48 ppb
0
54
101
361
1250
2050+
0.29 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
West Allis, Wisconsin
West Allis, Wisconsin
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AQI 25
Good
2.90μg/m³
PM2.5
11.24μg/m³
PM10
26.73ppb
O3
0.80ppb
SO2
3.61ppb
NO2
0.27ppm
CO
AQI 25
Good
2.85μg/m³
PM2.5
10.18μg/m³
PM10
26.75ppb
O3
0.80ppb
SO2
4.90ppb
NO2
0.29ppm
CO
AQI 25
Good
2.85μg/m³
PM2.5
9.97μg/m³
PM10
26.88ppb
O3
0.80ppb
SO2
5.15ppb
NO2
0.29ppm
CO
AQI 25
Good
2.94μg/m³
PM2.5
11.64μg/m³
PM10
26.56ppb
O3
0.80ppb
SO2
3.57ppb
NO2
0.28ppm
CO
AQI 28
Good
2.75μg/m³
PM2.5
11.76μg/m³
PM10
30.02ppb
O3
0.81ppb
SO2
3.71ppb
NO2
0.26ppm
CO
AQI 28
Good
2.66μg/m³
PM2.5
12.28μg/m³
PM10
30.42ppb
O3
0.81ppb
SO2
3.34ppb
NO2
0.24ppm
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 04:00:00 on 2025-09-07.
In the last 24 hrs, the best air quality in West Allis, Wisconsin was observed at 03:00:00 on 2025-09-07.
The current air quality in West Allis, Wisconsin is 27, categorized as Good based on real-time data.
The most common pollutant in West Allis, Wisconsin is PM2.5.
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 5.269 μg/m3.
The current PM10 concentration at West Allis, Wisconsin is 16.914 μg/m3.
The current carbon monoxide (CO) concentration at West Allis, Wisconsin is 0.286 ppm.
The current sulfur dioxide (SO2) concentration at West Allis, Wisconsin is 0.581 ppb.
The current ozone (O3) concentration at West Allis, Wisconsin is 19.965 ppm.
The current nitrogen dioxide (NO2) concentration at West Allis, Wisconsin is 5.478 ppb.
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