What is the air quality trend in Setouchi?

Over the past 21 days, Setouchi had an average AQI of 32 based on station measurements. The worst day was 2026-05-31 with AQI 52.

How is Setouchi air quality measured?

Air quality in Setouchi 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 Setouchi, Japan

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

479h

PM2.5 Station

479h · 14 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-06-09	28	26–31	6.8 µg/m³	3h	22
2026-06-08	27	20–35	6.5 µg/m³	24h	22
2026-06-07	25	15–40	6.0 µg/m³	24h	22
2026-06-06	35	23–51	8.4 µg/m³	24h	23
2026-06-05	31	18–38	7.4 µg/m³	24h	23
2026-06-04	27	18–37	6.5 µg/m³	24h	21
2026-06-03	27	19–36	6.4 µg/m³	24h	22
2026-06-02	23	14–31	5.5 µg/m³	24h	21
2026-06-01	42	20–64	10.4 µg/m³	24h	17
2026-05-31	52	39–61	13.0 µg/m³	24h	17
2026-05-30	44	37–52	10.5 µg/m³	24h	20
2026-05-29	37	25–56	8.9 µg/m³	24h	17
2026-05-28	32	20–42	7.6 µg/m³	24h	18
2026-05-27	28	18–40	6.8 µg/m³	24h	21
2026-05-26	32	23–42	7.6 µg/m³	24h	19
2026-05-25	35	20–65	8.5 µg/m³	24h	19
2026-05-24	35	28–48	8.5 µg/m³	24h	20
2026-05-23	34	27–55	8.1 µg/m³	24h	21
2026-05-22	27	20–40	6.6 µg/m³	24h	21
2026-05-21	30	18–48	7.3 µg/m³	24h	16
2026-05-20	34	23–51	8.1 µg/m³	20h	21

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