What is the air quality trend in Hachimantai?

Over the past 8 days, Hachimantai had an average AQI of 85 based on station measurements. The worst day was 2026-10-15 with AQI 157.

How is Hachimantai air quality measured?

Air quality in Hachimantai 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 Hachimantai, Japan

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

102h

PM2.5 Station

102h · 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	35	8–64	9.0 µg/m³	7h	2
2026-10-20	52	5–153	16.0 µg/m³	15h	1
2026-10-19	84	18–158	29.2 µg/m³	16h	1
2026-10-18	36	15–73	9.3 µg/m³	7h	2
2026-10-17	122	21–310	65.0 µg/m³	17h	1
2026-10-16	98	44–209	40.6 µg/m³	15h	1
2026-10-15	157	30–451	100.9 µg/m³	19h	2
2026-10-14	96	44–160	34.9 µg/m³	6h	1

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