Real-time air quality index in Portage, Indiana today
Stay updated with real-time air quality in Portage, Indiana 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)
67
Moderate
Portage, Indiana
Last updated: ... (Local time)
Common air pollutants in Portage, Indiana
Good
Fine
Moderate
Poor
Very poor
Hazardous
Particulate Matter2.5 (PM2.5)
18.14 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
80.10 μg/m³
0
55
155
255
425
605+
Ozone (O3)
23.23 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
1.76 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
26.25 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Portage, Indiana
Portage, Indiana
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Portage, Indiana air quality map: Real-time AQI near you
Air quality in nearby cities
Lake Station, Indiana
AQI 64
Moderate
16.15μg/m³
PM2.5
72.43μg/m³
PM10
20.57ppb
O3
1.35ppb
SO2
30.61ppb
NO2
0.25ppm
CO
Hobart, Indiana
AQI 64
Moderate
15.82μg/m³
PM2.5
70.99μg/m³
PM10
21.91ppb
O3
1.45ppb
SO2
29.77ppb
NO2
0.25ppm
CO
Chesterton, Indiana
AQI 60
Moderate
13.66μg/m³
PM2.5
61.51μg/m³
PM10
28.20ppb
O3
1.65ppb
SO2
22.73ppb
NO2
0.25ppm
CO
Gary, Indiana
AQI 66
Moderate
16.64μg/m³
PM2.5
74.71μg/m³
PM10
19.21ppb
O3
1.36ppb
SO2
31.01ppb
NO2
0.24ppm
CO
Valparaiso, Indiana
AQI 67
Moderate
17.72μg/m³
PM2.5
83.92μg/m³
PM10
32.55ppb
O3
1.64ppb
SO2
20.67ppb
NO2
0.25ppm
CO
Merrillville, Indiana
AQI 73
Moderate
20.98μg/m³
PM2.5
92.71μg/m³
PM10
20.66ppb
O3
1.51ppb
SO2
20.38ppb
NO2
0.24ppm
CO
How accurate is Indiana, USA air quality data?
Air quality measurements for Indiana, 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
Frequently asked questions
How frequently is the air quality data for Portage, Indiana updated?
Air quality data for Portage, Indiana is updated on an hourly basis.
When did Portage, Indiana experience the worst air quality in the last 24 hours?
The worst air quality in Portage, Indiana was recorded at 03:00:00 on 2026-10-22.
When did Portage, Indiana have its best air quality in the last 24 hours?
The best air quality in Portage, Indiana was recorded at 08:00:00 on 2026-10-21.
What is the real-time air quality index for Portage, Indiana?
The real-time air quality index in Portage, Indiana is 67, currently categorized as Moderate.
Which pollutant is found most often in Portage, Indiana?
The most common pollutant in Portage, Indiana is PM2.5.
What can I do if the air quality in Portage, Indiana is poor?
If the air quality in Portage, Indiana is poor, limit outdoor activities and use a mask to safeguard your health.
What are the current PM2.5 levels in Portage, Indiana?
The measured PM2.5 levels in Portage, Indiana at present are 18.142 μg/m3.
What are the current PM10 levels at Portage, Indiana?
The current PM10 levels in Portage, Indiana are 80.099 μg/m3.
What are the current carbon monoxide (CO) levels at Portage, Indiana?
The current carbon monoxide (CO) level in Portage, Indiana is 0.206 ppm.
What are the current sulfur dioxide (SO2) levels at Portage, Indiana?
The current sulfur dioxide (SO2) levels in Portage, Indiana are 1.762 ppb.
What are the current ozone (O3) levels at Portage, Indiana?
The current ozone (O3) levels at Portage, Indiana is 23.225 ppm.
What are the current nitrogen dioxide (NO2) levels at Portage, Indiana?
The current nitrogen dioxide (NO2) levels at Portage, Indiana is 26.255 ppb.
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