What is the air quality trend in Tōin?

Over the past 3 days, Tōin had an average AQI of 34 based on station measurements. The worst day was 2026-05-30 with AQI 38.

How is Tōin air quality measured?

Air quality in Tōin 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 Tōin, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

47h

PM2.5 Station

47h · 29 stations

Temperature GFS model

8pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-30	38	33–41	9.0 µg/m³	9.8	4h	54
2026-05-29	34	28–38	8.3 µg/m³	8.7	24h	46
2026-05-28	31	25–47	7.4 µg/m³	7.8	19h	44

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