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)
33
Good
Middleton, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.25 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
13.55 μg/m³
0
55
155
255
425
605+
35.79 ppb
0
55
71
86
201
201+
0.58 ppb
0
36
76
186
605
1005+
3.78 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Middleton, Wisconsin
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AQI 31
Good
4.05μg/m³
PM2.5
13.20μg/m³
PM10
34.43ppb
O3
0.63ppb
SO2
4.33ppb
NO2
0.20ppm
CO
AQI 31
Good
4.15μg/m³
PM2.5
14.23μg/m³
PM10
34.27ppb
O3
0.63ppb
SO2
4.34ppb
NO2
0.20ppm
CO
AQI 32
Good
4.35μg/m³
PM2.5
15.84μg/m³
PM10
34.54ppb
O3
0.66ppb
SO2
4.42ppb
NO2
0.20ppm
CO
AQI 31
Good
4.11μg/m³
PM2.5
13.79μg/m³
PM10
34.46ppb
O3
0.63ppb
SO2
4.33ppb
NO2
0.20ppm
CO
AQI 33
Good
4.31μg/m³
PM2.5
15.85μg/m³
PM10
36.29ppb
O3
0.61ppb
SO2
4.36ppb
NO2
0.20ppm
CO
AQI 33
Good
4.20μg/m³
PM2.5
14.64μg/m³
PM10
36.27ppb
O3
0.65ppb
SO2
4.29ppb
NO2
0.20ppm
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 11:00:00 on 2026-03-08.
The best air quality in Middleton, Wisconsin was recorded at 03:00:00 on 2026-03-09.
The real-time air quality index in Middleton, Wisconsin is 33, 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 4.254 μg/m3.
The current PM10 levels in Middleton, Wisconsin are 13.553 μg/m3.
The current carbon monoxide (CO) level in Middleton, Wisconsin is 0.2 ppm.
The current sulfur dioxide (SO2) levels in Middleton, Wisconsin are 0.583 ppb.
The current ozone (O3) levels at Middleton, Wisconsin is 35.786 ppm.
The current nitrogen dioxide (NO2) levels at Middleton, Wisconsin is 3.781 ppb.
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