What is the air quality trend in Ashiya?

Over the past 8 days, Ashiya had an average AQI of 63 based on station measurements. The worst day was 2026-10-14 with AQI 84.

How is Ashiya air quality measured?

Air quality in Ashiya 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 Ashiya, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 73 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	32–75	12.8 µg/m³	12h	67
2026-10-20	56	35–92	15.6 µg/m³	24h	63
2026-10-19	60	36–83	16.5 µg/m³	24h	58
2026-10-18	50	28–104	13.6 µg/m³	24h	64
2026-10-17	61	39–77	17.1 µg/m³	24h	59
2026-10-16	67	47–90	19.9 µg/m³	24h	53
2026-10-15	81	47–140	26.1 µg/m³	24h	61
2026-10-14	84	41–123	27.9 µg/m³	10h	54

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