What is the air quality trend in Ōshū?

Over the past 7 days, Ōshū had an average AQI of 44 based on station measurements. The worst day was 2026-07-21 with AQI 57.

How is Ōshū air quality measured?

Air quality in Ōshū 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 Ōshū, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

114h

PM2.5 Station

114h · 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	57	24–82	16.2 µg/m³	14h	1
2026-07-20	55	26–84	14.9 µg/m³	19h	1
2026-07-19	42	17–78	11.1 µg/m³	11h	1
2026-07-18	36	9–76	9.0 µg/m³	20h	1
2026-07-17	38	15–55	9.2 µg/m³	17h	1
2026-07-16	46	12–76	12.0 µg/m³	18h	1
2026-07-15	36	17–53	8.8 µg/m³	15h	1

Back to Ōshū Air Quality