What is the air quality trend in Sanmu?

Over the past 8 days, Sanmu had an average AQI of 41 based on station measurements. The worst day was 2026-10-14 with AQI 52.

How is Sanmu air quality measured?

Air quality in Sanmu 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 Sanmu, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 39 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	33	28–38	7.9 µg/m³	10h	45
2026-10-20	38	29–57	9.2 µg/m³	24h	40
2026-10-19	41	30–63	10.1 µg/m³	24h	39
2026-10-18	33	23–44	7.9 µg/m³	24h	43
2026-10-17	41	30–48	9.8 µg/m³	24h	38
2026-10-16	52	35–90	13.5 µg/m³	24h	34
2026-10-15	44	28–133	11.3 µg/m³	24h	35
2026-10-14	52	28–154	15.3 µg/m³	12h	33

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