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)
35
Good
Portage, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.61 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
21.11 μg/m³
0
55
155
255
425
605+
38.33 ppb
0
55
71
86
201
201+
0.37 ppb
0
36
76
186
605
1005+
4.07 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Portage, Wisconsin
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AQI 34
Good
6.14μg/m³
PM2.5
36.88μg/m³
PM10
36.61ppb
O3
0.34ppb
SO2
1.97ppb
NO2
0.26ppm
CO
AQI 38
Good
4.87μg/m³
PM2.5
16.46μg/m³
PM10
41.49ppb
O3
0.34ppb
SO2
1.76ppb
NO2
0.24ppm
CO
AQI 41
Good
4.58μg/m³
PM2.5
17.37μg/m³
PM10
43.63ppb
O3
0.35ppb
SO2
1.83ppb
NO2
0.25ppm
CO
AQI 35
Good
5.79μg/m³
PM2.5
21.01μg/m³
PM10
37.74ppb
O3
0.28ppb
SO2
3.93ppb
NO2
0.27ppm
CO
AQI 38
Good
4.78μg/m³
PM2.5
17.99μg/m³
PM10
40.86ppb
O3
0.34ppb
SO2
1.74ppb
NO2
0.24ppm
CO
AQI 41
Good
4.31μg/m³
PM2.5
13.73μg/m³
PM10
43.82ppb
O3
0.35ppb
SO2
1.80ppb
NO2
0.25ppm
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 12:00:00 on 2026-03-09.
In the last 24 hours, the best air quality in Portage, Wisconsin was observed at 02:00:00 on 2026-03-09.
As of now, the AQI in Portage, Wisconsin is 35, 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 5.606 μg/m3.
The PM10 concentration in Portage, Wisconsin is 21.111 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Portage, Wisconsin is 0.242 ppm.
Currently, Portage, Wisconsin has a sulfur dioxide (SO2) concentration of 0.373 ppb.
The current ozone (O3) level in Portage, Wisconsin at the moment is 38.333 ppm.
Nitrogen dioxide (NO2) level in Portage, Wisconsin at the moment is 4.072 ppb.
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