What is the air quality trend in Shiraoi?

Over the past 8 days, Shiraoi had an average AQI of 47 based on station measurements. The worst day was 2026-07-15 with AQI 59.

How is Shiraoi air quality measured?

Air quality in Shiraoi 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 Shiraoi, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

151h

PM2.5 Station

151h · 3 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	21	21–21	5.0 µg/m³	1h	3
2026-07-21	57	25–116	15.9 µg/m³	18h	2
2026-07-20	42	10–71	10.8 µg/m³	22h	2
2026-07-19	49	18–94	12.8 µg/m³	24h	3
2026-07-18	50	24–78	13.3 µg/m³	23h	3
2026-07-17	55	3–76	14.9 µg/m³	23h	3
2026-07-16	45	18–66	11.2 µg/m³	22h	2
2026-07-15	59	29–154	16.8 µg/m³	18h	2

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