What is the air quality trend in Umi?

Over the past 8 days, Umi had an average AQI of 54 based on station measurements. The worst day was 2026-10-14 with AQI 80.

How is Umi air quality measured?

Air quality in Umi 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 Umi, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 25 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	39	26–84	10.6 µg/m³	6h	29
2026-10-20	43	25–82	11.1 µg/m³	24h	27
2026-10-19	55	35–134	15.2 µg/m³	24h	27
2026-10-18	35	26–60	8.6 µg/m³	24h	27
2026-10-17	57	33–137	16.0 µg/m³	24h	26
2026-10-16	67	44–108	20.0 µg/m³	24h	24
2026-10-15	60	32–142	17.3 µg/m³	24h	25
2026-10-14	80	32–164	28.5 µg/m³	15h	23

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