What is the air quality trend in Portage?

Over the past 8 days, Portage had an average AQI of 104 based on station measurements. The worst day was 2026-07-17 with AQI 234.

How is Portage air quality measured?

Air quality in Portage is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Portage, United States

Name: Portage Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Portage, United States.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

167h

PM2.5 Station

167h · 4 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	65	32–98	19.4 µg/m³	22h	227
2026-07-20	99	63–106	34.6 µg/m³	24h	231
2026-07-19	111	57–160	40.6 µg/m³	24h	240
2026-07-18	50	33–88	12.9 µg/m³	24h	240
2026-07-17	234	69–362	180.3 µg/m³	24h	253
2026-07-16	155	51–328	101.7 µg/m³	24h	234
2026-07-15	59	51–179	17.5 µg/m³	24h	245
2026-07-14	59	59–59	16.0 µg/m³	1h	259

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