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)
22
Good
Portage, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.64 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.53 μg/m³
0
55
155
255
425
605+
19.31 ppb
0
55
71
86
201
201+
0.50 ppb
0
36
76
186
605
1005+
3.52 ppb
0
54
101
361
1250
2050+
0.22 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Portage, Wisconsin
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AQI 22
Good
3.58μg/m³
PM2.5
9.97μg/m³
PM10
18.45ppb
O3
0.52ppb
SO2
3.49ppb
NO2
0.23ppm
CO
AQI 22
Good
3.58μg/m³
PM2.5
15.63μg/m³
PM10
19.39ppb
O3
0.47ppb
SO2
3.60ppb
NO2
0.22ppm
CO
AQI 24
Good
3.23μg/m³
PM2.5
8.62μg/m³
PM10
25.74ppb
O3
0.47ppb
SO2
3.61ppb
NO2
0.22ppm
CO
AQI 22
Good
3.87μg/m³
PM2.5
11.61μg/m³
PM10
19.34ppb
O3
0.56ppb
SO2
3.40ppb
NO2
0.24ppm
CO
AQI 22
Good
3.57μg/m³
PM2.5
12.34μg/m³
PM10
20.74ppb
O3
0.45ppb
SO2
3.83ppb
NO2
0.22ppm
CO
AQI 24
Good
3.27μg/m³
PM2.5
6.58μg/m³
PM10
25.83ppb
O3
0.47ppb
SO2
3.59ppb
NO2
0.22ppm
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 07:00:00 on 2026-08-16.
In the last 24 hours, the best air quality in Portage, Wisconsin was observed at 07:00:00 on 2026-08-17.
As of now, the AQI in Portage, Wisconsin is 22, indicating Good conditions.
Portage, Wisconsin air has the highest levels of PM2.5.
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 3.639 μg/m3.
The PM10 concentration in Portage, Wisconsin is 16.528 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Portage, Wisconsin is 0.219 ppm.
Currently, Portage, Wisconsin has a sulfur dioxide (SO2) concentration of 0.5 ppb.
The current ozone (O3) level in Portage, Wisconsin at the moment is 19.313 ppm.
Nitrogen dioxide (NO2) level in Portage, Wisconsin at the moment is 3.519 ppb.
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