What is the air quality trend in Sayama?

Over the past 7 days, Sayama had an average AQI of 40 based on station measurements. The worst day was with AQI .

How is Sayama air quality measured?

Air quality in Sayama 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 Sayama, Japan

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

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

Current AQI
Good

48 Hours 7 Days 14 Days 20 Days

PM2.5 Trend

108h · 8 stations

Daily Summary

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-04-11	56	52–61	14.5 µg/m³	19.7	4h	12
2026-04-10	39	15–66	9.8 µg/m³	16.5	24h	12
2026-04-09	31	13–40	7.4 µg/m³	13.0	18h	11
2026-04-08	36	27–44	8.6 µg/m³	9.9	9h	11
2026-04-07	30	6–63	7.4 µg/m³	11.1	24h	11
2026-04-06	54	45–63	13.5 µg/m³	19.7	18h	13
2026-04-04	37	16–103	9.9 µg/m³	16.4	11h	11

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