What is the air quality trend in Arao?

Over the past 8 days, Arao had an average AQI of 39 based on station measurements. The worst day was 2026-08-06 with AQI 49.

How is Arao air quality measured?

Air quality in Arao 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 Arao, Japan

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

161h

PM2.5 Station

161h · 21 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	24	22–27	5.9 µg/m³	2h	22
2026-08-07	31	23–49	7.3 µg/m³	21h	17
2026-08-06	49	24–122	12.7 µg/m³	23h	10
2026-08-05	44	22–61	11.0 µg/m³	23h	8
2026-08-04	38	30–53	9.1 µg/m³	24h	14
2026-08-03	39	26–52	9.3 µg/m³	24h	15
2026-08-02	42	23–53	10.0 µg/m³	24h	14
2026-08-01	46	25–58	11.5 µg/m³	20h	16

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