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)
44
Good
Middleton, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.16 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.06 μg/m³
0
55
155
255
425
605+
21.22 ppb
0
55
71
86
201
201+
0.56 ppb
0
36
76
186
605
1005+
6.47 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 52
Moderate
9.95μg/m³
PM2.5
22.04μg/m³
PM10
20.59ppb
O3
0.55ppb
SO2
8.02ppb
NO2
0.21ppm
CO
AQI 52
Moderate
9.60μg/m³
PM2.5
24.85μg/m³
PM10
20.84ppb
O3
0.54ppb
SO2
8.09ppb
NO2
0.21ppm
CO
AQI 52
Moderate
9.67μg/m³
PM2.5
32.47μg/m³
PM10
17.64ppb
O3
0.54ppb
SO2
8.62ppb
NO2
0.21ppm
CO
AQI 52
Moderate
9.86μg/m³
PM2.5
23.29μg/m³
PM10
20.63ppb
O3
0.55ppb
SO2
8.05ppb
NO2
0.21ppm
CO
AQI 49
Good
9.46μg/m³
PM2.5
26.55μg/m³
PM10
20.13ppb
O3
0.55ppb
SO2
8.51ppb
NO2
0.21ppm
CO
AQI 52
Moderate
9.62μg/m³
PM2.5
30.94μg/m³
PM10
17.29ppb
O3
0.54ppb
SO2
8.57ppb
NO2
0.21ppm
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 01:00:00 on 2025-12-06.
The best air quality in Middleton, Wisconsin was recorded at 04:00:00 on 2025-12-06.
The real-time air quality index in Middleton, Wisconsin is 44, currently categorized as Good.
The most common pollutant in Middleton, Wisconsin is PM2.5.
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 8.165 μg/m3.
The current PM10 levels in Middleton, Wisconsin are 15.065 μg/m3.
The current carbon monoxide (CO) level in Middleton, Wisconsin is 0.15 ppm.
The current sulfur dioxide (SO2) levels in Middleton, Wisconsin are 0.565 ppb.
The current ozone (O3) levels at Middleton, Wisconsin is 21.221 ppm.
The current nitrogen dioxide (NO2) levels at Middleton, Wisconsin is 6.469 ppb.
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