What is the air quality trend in Port Huron?

Over the past 5 days, Port Huron had an average AQI of 130 based on station measurements. The worst day was 2026-07-17 with AQI 311.

How is Port Huron air quality measured?

Air quality in Port Huron 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 Port Huron, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

17h

PM2.5 Station

17h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	42	42–42	10.1 µg/m³	1h	1
2026-07-20	74	57–93	23.0 µg/m³	6h	1
2026-07-19	133	95–187	62.3 µg/m³	4h	1
2026-07-18	90	38–178	40.5 µg/m³	4h	1
2026-07-17	311	310–312	263.1 µg/m³	2h	1

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