What is the air quality trend in Shioiri?

Over the past 14 days, Shioiri had an average AQI of 36 based on station measurements. The worst day was 2026-05-16 with AQI 54.

How is Shioiri air quality measured?

Air quality in Shioiri 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 Shioiri, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

330h

PM2.5 Station

330h · 29 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-29	37	28–47	9.0 µg/m³	13.7	24h	24
2026-05-28	33	22–45	8.0 µg/m³	18.0	24h	24
2026-05-27	27	18–41	6.6 µg/m³	10.7	24h	24
2026-05-26	30	19–44	7.3 µg/m³	12.9	24h	24
2026-05-25	34	26–42	8.1 µg/m³	17.3	24h	26
2026-05-24	33	25–47	7.9 µg/m³	10.4	24h	26
2026-05-23	32	25–40	7.6 µg/m³	9.0	24h	27
2026-05-22	27	18–36	6.5 µg/m³	4.5	24h	26
2026-05-21	31	20–42	7.3 µg/m³	10.2	24h	22
2026-05-20	35	23–49	8.3 µg/m³	14.5	24h	26
2026-05-19	44	32–55	10.6 µg/m³	27.4	24h	26
2026-05-18	54	40–61	13.9 µg/m³	28.5	24h	25
2026-05-17	46	38–53	11.1 µg/m³	12.8	23h	23
2026-05-16	54	36–60	14.0 µg/m³	16.3	19h	24

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