What is the air quality trend in Ryōgoku?

Over the past 15 days, Ryōgoku had an average AQI of 34 based on station measurements. The worst day was 2026-05-31 with AQI 54.

How is Ryōgoku air quality measured?

Air quality in Ryōgoku 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 Ryōgoku, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

336h

PM2.5 Station

336h · 7 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-06-09	25	22–30	6.1 µg/m³	6h	37
2026-06-08	27	21–36	6.5 µg/m³	24h	43
2026-06-07	29	20–41	7.1 µg/m³	24h	48
2026-06-06	34	28–50	8.2 µg/m³	24h	49
2026-06-05	32	25–43	7.6 µg/m³	24h	52
2026-06-04	31	22–45	7.4 µg/m³	24h	45
2026-06-03	27	18–35	6.6 µg/m³	24h	47
2026-06-02	26	18–36	6.2 µg/m³	24h	45
2026-06-01	48	28–77	12.2 µg/m³	24h	41
2026-05-31	54	45–67	13.6 µg/m³	24h	41
2026-05-30	45	37–55	10.9 µg/m³	24h	46
2026-05-29	43	32–101	10.8 µg/m³	24h	45
2026-05-28	38	25–63	9.2 µg/m³	24h	41
2026-05-27	31	23–41	7.5 µg/m³	24h	45
2026-05-26	32	25–39	7.8 µg/m³	18h	47

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