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

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.59 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
9.25 μg/m³
0
55
155
255
425
605+
41.36 ppb
0
55
71
86
201
201+
0.76 ppb
0
36
76
186
605
1005+
2.39 ppb
0
54
101
361
1250
2050+
0.15 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Middleton, Wisconsin
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AQI 38
Good
3.63μg/m³
PM2.5
10.17μg/m³
PM10
41.40ppb
O3
0.75ppb
SO2
2.33ppb
NO2
0.15ppm
CO
AQI 38
Good
3.72μg/m³
PM2.5
12.24μg/m³
PM10
41.00ppb
O3
0.78ppb
SO2
2.53ppb
NO2
0.15ppm
CO
AQI 38
Good
4.01μg/m³
PM2.5
14.28μg/m³
PM10
40.83ppb
O3
0.74ppb
SO2
2.25ppb
NO2
0.16ppm
CO
AQI 38
Good
3.66μg/m³
PM2.5
11.00μg/m³
PM10
41.30ppb
O3
0.76ppb
SO2
2.40ppb
NO2
0.15ppm
CO
AQI 39
Good
4.11μg/m³
PM2.5
22.92μg/m³
PM10
41.83ppb
O3
0.75ppb
SO2
2.34ppb
NO2
0.15ppm
CO
AQI 37
Good
4.10μg/m³
PM2.5
23.66μg/m³
PM10
40.35ppb
O3
0.68ppb
SO2
2.31ppb
NO2
0.15ppm
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 Middleton, Wisconsin is updated on an hourly basis.
The worst air quality in Middleton, Wisconsin was recorded at 09:00:00 on 2026-07-23.
The best air quality in Middleton, Wisconsin was recorded at 02:00:00 on 2026-07-23.
The real-time air quality index in Middleton, Wisconsin is 38, currently categorized as Good.
The most common pollutant in Middleton, Wisconsin is O3.
If the air quality in Middleton, Wisconsin is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Middleton, Wisconsin at present are 3.593 μg/m3.
The current PM10 levels in Middleton, Wisconsin are 9.252 μg/m3.
The current carbon monoxide (CO) level in Middleton, Wisconsin is 0.152 ppm.
The current sulfur dioxide (SO2) levels in Middleton, Wisconsin are 0.758 ppb.
The current ozone (O3) levels at Middleton, Wisconsin is 41.359 ppm.
The current nitrogen dioxide (NO2) levels at Middleton, Wisconsin is 2.387 ppb.
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