What is the air quality trend in Arao?

Over the past 15 days, Arao had an average AQI of 46 based on station measurements. The worst day was 2026-07-21 with AQI 59.

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 Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

333h

PM2.5 Station

333h · 30 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	54	45–62	13.9 µg/m³	2h	28
2026-07-21	59	51–73	15.9 µg/m³	23h	15
2026-07-20	54	42–71	13.7 µg/m³	24h	21
2026-07-19	46	28–61	11.2 µg/m³	24h	23
2026-07-18	46	28–61	11.1 µg/m³	24h	23
2026-07-17	54	41–62	14.0 µg/m³	24h	24
2026-07-16	56	46–65	14.5 µg/m³	24h	25
2026-07-15	53	41–60	13.2 µg/m³	24h	25
2026-07-14	52	39–132	13.3 µg/m³	24h	26
2026-07-13	51	41–61	12.8 µg/m³	24h	24
2026-07-12	50	35–159	13.5 µg/m³	24h	25
2026-07-11	31	16–58	7.4 µg/m³	24h	25
2026-07-10	29	20–50	7.1 µg/m³	24h	27
2026-07-09	35	23–51	8.4 µg/m³	24h	24
2026-07-08	30	21–41	7.2 µg/m³	20h	27

Back to Arao Air Quality