What is the air quality trend in Tokorozawa?

Over the past 8 days, Tokorozawa had an average AQI of 42 based on station measurements. The worst day was with AQI .

How is Tokorozawa air quality measured?

Air quality in Tokorozawa 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 Tokorozawa, Japan

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

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

Current AQI
Good

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Trend

138h

PM2.5 Trend

138h · 19 stations

Daily Summary

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-04-15	40	33–46	9.6 µg/m³	14.4	3h	20
2026-04-14	54	47–63	13.7 µg/m³	21.3	24h	19
2026-04-13	50	27–58	12.4 µg/m³	19.9	17h	16
2026-04-12	46	35–53	11.0 µg/m³	16.2	24h	18
2026-04-11	47	28–60	11.8 µg/m³	17.1	24h	19
2026-04-10	36	15–57	8.7 µg/m³	16.4	24h	17
2026-04-09	30	13–40	7.2 µg/m³	13.3	18h	16
2026-04-08	34	27–42	8.2 µg/m³	9.3	4h	11

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