What is the air quality trend in Koganei?

Over the past 7 days, Koganei had an average AQI of 37 based on station measurements. The worst day was with AQI .

How is Koganei air quality measured?

Air quality in Koganei 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 Koganei, Japan

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

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

Current AQI
Moderate

48 Hours 7 Days 14 Days 20 Days

PM2.5 Trend

108h · 15 stations

Daily Summary

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-04-10	31	15–55	7.6 µg/m³	15.8	20h	17
2026-04-09	29	13–40	7.0 µg/m³	13.4	18h	17
2026-04-08	34	27–41	8.2 µg/m³	9.9	9h	16
2026-04-07	30	9–63	7.4 µg/m³	11.2	24h	16
2026-04-06	52	44–61	13.1 µg/m³	19.9	18h	19
2026-04-04	37	16–57	9.1 µg/m³	15.2	15h	18
2026-04-03	47	45–48	11.2 µg/m³	15.8	4h	20

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