What is the air quality trend in Shimo-tsuma?

Over the past 8 days, Shimo-tsuma had an average AQI of 47 based on station measurements. The worst day was 2026-10-14 with AQI 63.

How is Shimo-tsuma air quality measured?

Air quality in Shimo-tsuma 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 Shimo-tsuma, Japan

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

Historical PM2.5 and AQI trend from monitoring stations near Shimo-tsuma, Japan.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 50 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	34	29–43	8.2 µg/m³	8h	50
2026-10-20	45	30–90	11.5 µg/m³	24h	41
2026-10-19	48	33–91	12.4 µg/m³	24h	40
2026-10-18	35	26–46	8.4 µg/m³	24h	44
2026-10-17	46	35–70	11.2 µg/m³	24h	40
2026-10-16	57	41–87	15.4 µg/m³	24h	35
2026-10-15	54	26–155	15.0 µg/m³	24h	37
2026-10-14	63	24–144	18.8 µg/m³	13h	34

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