Stay updated with real-time air quality in Brookfield, 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)
38
Good
Brookfield, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.86 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.55 μg/m³
0
55
155
255
425
605+
41.36 ppb
0
55
71
86
201
201+
0.90 ppb
0
36
76
186
605
1005+
4.38 ppb
0
54
101
361
1250
2050+
0.11 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Brookfield, Wisconsin
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AQI 39
Good
4.91μg/m³
PM2.5
13.27μg/m³
PM10
41.98ppb
O3
0.85ppb
SO2
4.47ppb
NO2
0.11ppm
CO
AQI 38
Good
4.86μg/m³
PM2.5
16.55μg/m³
PM10
41.36ppb
O3
0.90ppb
SO2
4.38ppb
NO2
0.11ppm
CO
AQI 39
Good
4.97μg/m³
PM2.5
18.87μg/m³
PM10
42.01ppb
O3
0.93ppb
SO2
4.34ppb
NO2
0.10ppm
CO
AQI 39
Good
4.90μg/m³
PM2.5
13.07μg/m³
PM10
41.99ppb
O3
0.85ppb
SO2
4.47ppb
NO2
0.11ppm
CO
AQI 40
Good
4.85μg/m³
PM2.5
17.07μg/m³
PM10
42.90ppb
O3
0.75ppb
SO2
4.54ppb
NO2
0.11ppm
CO
AQI 39
Good
5.01μg/m³
PM2.5
18.39μg/m³
PM10
41.68ppb
O3
0.93ppb
SO2
4.33ppb
NO2
0.10ppm
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 Brookfield, Wisconsin is updated on an hourly basis.
The worst air quality in Brookfield, Wisconsin was recorded at 03:00:00 on 2026-07-23.
The best air quality in Brookfield, Wisconsin was recorded at 04:00:00 on 2026-07-23.
The real-time air quality index in Brookfield, Wisconsin is 38, currently categorized as Good.
The most common pollutant in Brookfield, Wisconsin is O3.
If the air quality in Brookfield, Wisconsin is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Brookfield, Wisconsin at present are 4.859 μg/m3.
The current PM10 levels in Brookfield, Wisconsin are 16.545 μg/m3.
The current carbon monoxide (CO) level in Brookfield, Wisconsin is 0.107 ppm.
The current sulfur dioxide (SO2) levels in Brookfield, Wisconsin are 0.895 ppb.
The current ozone (O3) levels at Brookfield, Wisconsin is 41.361 ppm.
The current nitrogen dioxide (NO2) levels at Brookfield, Wisconsin is 4.379 ppb.
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