What is the air quality trend in Shimabara?

Over the past 8 days, Shimabara had an average AQI of 28 based on station measurements. The worst day was 2026-06-09 with AQI 34.

How is Shimabara air quality measured?

Air quality in Shimabara 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 Shimabara, Japan

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 32 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-06-09	34	28–47	8.2 µg/m³	10h	36
2026-06-08	28	20–36	6.6 µg/m³	24h	37
2026-06-07	27	20–33	6.4 µg/m³	24h	39
2026-06-06	30	23–41	7.3 µg/m³	24h	39
2026-06-05	29	25–37	6.9 µg/m³	24h	39
2026-06-04	27	22–33	6.6 µg/m³	24h	39
2026-06-03	27	20–36	6.4 µg/m³	24h	38
2026-06-02	24	19–31	5.7 µg/m³	12h	37

Back to Shimabara Air Quality