What is the air quality trend in Sumida?

Over the past 6 days, Sumida had an average AQI of 39 based on station measurements. The worst day was with AQI .

How is Sumida air quality measured?

Air quality in Sumida 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 Sumida, Japan

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

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

Current AQI
Good

48 Hours 7 Days 14 Days 20 Days

PM2.5 Trend

110h · 13 stations

Daily Summary

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-04-11	50	27–59	12.7 µg/m³	18.9	17h	18
2026-04-10	38	18–58	9.3 µg/m³	16.9	24h	16
2026-04-09	31	13–42	7.3 µg/m³	13.5	18h	16
2026-04-08	35	27–42	8.3 µg/m³	10.0	9h	15
2026-04-07	29	8–63	7.1 µg/m³	11.0	24h	15
2026-04-06	53	42–62	13.3 µg/m³	20.0	18h	17

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