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)
43
Good
Middleton, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.40 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
20.75 μg/m³
0
55
155
255
425
605+
46.28 ppb
0
55
71
86
201
201+
0.82 ppb
0
36
76
186
605
1005+
3.62 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 43
Good
7.24μg/m³
PM2.5
21.77μg/m³
PM10
46.46ppb
O3
0.82ppb
SO2
3.57ppb
NO2
0.20ppm
CO
AQI 43
Good
7.03μg/m³
PM2.5
22.95μg/m³
PM10
46.21ppb
O3
0.81ppb
SO2
3.79ppb
NO2
0.20ppm
CO
AQI 44
Good
7.42μg/m³
PM2.5
23.93μg/m³
PM10
46.50ppb
O3
0.89ppb
SO2
3.46ppb
NO2
0.20ppm
CO
AQI 43
Good
7.18μg/m³
PM2.5
22.26μg/m³
PM10
46.42ppb
O3
0.82ppb
SO2
3.66ppb
NO2
0.20ppm
CO
AQI 44
Good
7.71μg/m³
PM2.5
23.63μg/m³
PM10
48.45ppb
O3
0.77ppb
SO2
3.57ppb
NO2
0.20ppm
CO
AQI 44
Good
7.68μg/m³
PM2.5
24.50μg/m³
PM10
47.22ppb
O3
0.87ppb
SO2
3.52ppb
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 03:00:00 on 2026-04-23.
The best air quality in Middleton, Wisconsin was recorded at 03:00:00 on 2026-04-23.
The real-time air quality index in Middleton, Wisconsin is 43, 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 7.404 μg/m3.
The current PM10 levels in Middleton, Wisconsin are 20.747 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 0.824 ppb.
The current ozone (O3) levels at Middleton, Wisconsin is 46.277 ppm.
The current nitrogen dioxide (NO2) levels at Middleton, Wisconsin is 3.622 ppb.
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