Air Quality in Portage, United States

Windy
23.0°C · 76.5% humidity
23.0°
Feels 23.0°
62
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
3 stations

Nearby Monitoring Stations

AQI Forecast
27 12pm
25
25
62 3pm
52
44
39 6pm
35
34
32 9pm
31
30
29 12am
26
28
55 3am
66
83
83 6am
66
54
54 9am
83
84
AD 728×90

Air Quality Index Trend

48h · 3 stn

Portage's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration. Current PM2.5 concentration in Portage is 1.1× the WHO 24-hour guideline of 15 µg/m³.

76.5%
Humidity
56.8 km/h
Wind NNE
1015.0 hPa
Pressure
17.4
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
62
17.1 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Portage?

Temperature & Precipitation

PM2.5 Trend

48h · 3 stations
PM2.517.1 µg/m³ ×1.1 WHO
Moderate
PM1013.7 µg/m³
Good
UV INDEX17.4
Extreme
AD 300×250
Station readings (3 stations within 25 km)
17.1
Median
16.53
Average
15.9
Low
17.3
High
PM2.5 µg/m³ · Model: 7.1 · Bias: -10.0

What is the 7-day forecast for Portage?

07-21
25.2° 22.8°
1.94 mm
07-22
23.6° 22.0°
07-23
23.1° 18.9°
9.62 mm
07-24
24.7° 20.8°
07-25
23.3° 19.6°
0.06 mm
07-26
25.1° 23.0°
1.44 mm
07-27
25.1° 22.6°
0.25 mm
Both models agree Avg diff: 3.5°C

Where are air quality stations near Portage?

62
Ogden Dunes, Indiana, USA
5.0 km PM2.5: 17.3 µg/m³
60
Gary-IITRI, Indiana, USA
11.2 km PM2.5: 16.4 µg/m³
33
Gary-IITRI, Indiana, USA
11.2 km PM2.5: 7.9 µg/m³
59
East Chicago - Marina, Indiana, USA
23.2 km PM2.5: 15.9 µg/m³

What cities are near Portage?

61 Hobart 61 Gary 62 Valparaiso 60 Merrillville 62 Griffith 61 Highland 60 Crown Point 60 East Chicago 62 Schererville 62 Hammond
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-07-21T20:10 UTC.