What is the air quality trend in Sandachō?

Over the past 8 days, Sandachō had an average AQI of 67 based on station measurements. The worst day was 2026-10-14 with AQI 99.

How is Sandachō air quality measured?

Air quality in Sandachō 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 Sandachō, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 46 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	48	31–73	12.8 µg/m³	4h	58
2026-10-20	49	30–80	12.8 µg/m³	24h	52
2026-10-19	63	37–101	18.3 µg/m³	24h	46
2026-10-18	43	26–82	10.8 µg/m³	24h	55
2026-10-17	70	36–120	21.3 µg/m³	24h	49
2026-10-16	78	44–155	24.6 µg/m³	24h	44
2026-10-15	88	55–159	29.8 µg/m³	24h	50
2026-10-14	99	40–157	34.6 µg/m³	17h	42

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