What is the air quality trend in Ryōtsu-minato?

Over the past 8 days, Ryōtsu-minato had an average AQI of 54 based on station measurements. The worst day was 2026-10-14 with AQI 97.

How is Ryōtsu-minato air quality measured?

Air quality in Ryōtsu-minato 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 Ryōtsu-minato, Japan

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

Historical PM2.5 and AQI trend from monitoring stations near Ryōtsu-minato, Japan.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

155h

PM2.5 Station

155h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	37	10–75	9.4 µg/m³	10h	3
2026-10-20	39	13–118	10.2 µg/m³	24h	2
2026-10-19	48	23–126	13.3 µg/m³	21h	2
2026-10-18	33	14–56	7.9 µg/m³	23h	3
2026-10-17	42	15–97	11.1 µg/m³	20h	2
2026-10-16	66	8–284	26.4 µg/m³	21h	2
2026-10-15	72	4–165	25.2 µg/m³	24h	2
2026-10-14	97	13–157	36.6 µg/m³	12h	2

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