What is the air quality trend in Hikiso?

Over the past 8 days, Hikiso had an average AQI of 53 based on station measurements. The worst day was 2026-10-15 with AQI 68.

How is Hikiso air quality measured?

Air quality in Hikiso 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 Hikiso, Japan

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 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	35	29–41	8.4 µg/m³	10h	70
2026-10-20	48	31–98	12.5 µg/m³	24h	64
2026-10-19	52	35–86	13.5 µg/m³	24h	60
2026-10-18	37	26–57	9.0 µg/m³	24h	66
2026-10-17	55	39–87	15.0 µg/m³	24h	62
2026-10-16	67	48–152	19.7 µg/m³	24h	52
2026-10-15	68	34–156	20.8 µg/m³	24h	58
2026-10-14	63	32–99	18.4 µg/m³	12h	50

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