What is the air quality trend in Hirosaki?

Over the past 8 days, Hirosaki had an average AQI of 44 based on station measurements. The worst day was 2026-10-16 with AQI 87.

How is Hirosaki air quality measured?

Air quality in Hirosaki 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 Hirosaki, Japan

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

Historical PM2.5 and AQI trend from monitoring stations near Hirosaki, Japan.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

121h

PM2.5 Station

121h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	34	17–57	8.3 µg/m³	6h	2
2026-10-20	30	9–68	7.7 µg/m³	17h	2
2026-10-19	33	13–64	8.1 µg/m³	14h	2
2026-10-18	32	11–84	8.1 µg/m³	20h	2
2026-10-17	54	15–167	16.6 µg/m³	20h	2
2026-10-16	87	15–179	37.5 µg/m³	16h	1
2026-10-15	29	13–53	7.1 µg/m³	17h	1
2026-10-14	59	17–168	22.4 µg/m³	11h	2

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