Stay updated with real-time air quality in Portage, 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)
46
Good
Portage, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.98 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
21.90 μg/m³
0
55
155
255
425
605+
50.28 ppb
0
55
71
86
201
201+
0.83 ppb
0
36
76
186
605
1005+
1.82 ppb
0
54
101
361
1250
2050+
0.16 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Portage, Wisconsin
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AQI 40
Good
5.57μg/m³
PM2.5
18.30μg/m³
PM10
43.22ppb
O3
0.86ppb
SO2
1.84ppb
NO2
0.16ppm
CO
AQI 45
Good
6.96μg/m³
PM2.5
23.91μg/m³
PM10
49.18ppb
O3
0.80ppb
SO2
1.84ppb
NO2
0.16ppm
CO
AQI 44
Good
6.38μg/m³
PM2.5
20.72μg/m³
PM10
46.80ppb
O3
0.85ppb
SO2
1.90ppb
NO2
0.16ppm
CO
AQI 44
Good
6.09μg/m³
PM2.5
23.99μg/m³
PM10
47.22ppb
O3
0.96ppb
SO2
1.52ppb
NO2
0.22ppm
CO
AQI 45
Good
6.95μg/m³
PM2.5
23.57μg/m³
PM10
49.39ppb
O3
0.78ppb
SO2
1.84ppb
NO2
0.15ppm
CO
AQI 44
Good
6.73μg/m³
PM2.5
18.63μg/m³
PM10
46.51ppb
O3
0.86ppb
SO2
1.86ppb
NO2
0.16ppm
CO
Air quality and pollutant data for Wisconsin, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Portage, Wisconsin is updated every hour for accuracy.
In the past 24 hours, the air quality in Portage, Wisconsin was at its worst at 09:00:00 on 2026-04-23.
In the last 24 hours, the best air quality in Portage, Wisconsin was observed at 03:00:00 on 2026-04-23.
As of now, the AQI in Portage, Wisconsin is 46, indicating Good conditions.
Portage, Wisconsin air has the highest levels of O3.
Poor air quality in Portage, Wisconsin means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Portage, Wisconsin are currently 5.981 μg/m3.
The PM10 concentration in Portage, Wisconsin is 21.896 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Portage, Wisconsin is 0.157 ppm.
Currently, Portage, Wisconsin has a sulfur dioxide (SO2) concentration of 0.831 ppb.
The current ozone (O3) level in Portage, Wisconsin at the moment is 50.28 ppm.
Nitrogen dioxide (NO2) level in Portage, Wisconsin at the moment is 1.825 ppb.
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