What is the air quality trend in Shimabara?

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

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
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

331h

PM2.5 Station

331h · 6 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-29	40	26–49	9.6 µg/m³	24h	17
2026-05-28	31	22–40	7.5 µg/m³	24h	19
2026-05-27	29	23–43	7.0 µg/m³	24h	19
2026-05-26	29	20–45	7.0 µg/m³	24h	19
2026-05-25	33	20–45	8.0 µg/m³	24h	20
2026-05-24	33	27–47	8.0 µg/m³	24h	19
2026-05-23	33	25–47	7.9 µg/m³	24h	20
2026-05-22	28	18–41	6.8 µg/m³	24h	19
2026-05-21	30	17–42	7.3 µg/m³	24h	17
2026-05-20	33	23–45	7.9 µg/m³	24h	20
2026-05-19	41	30–59	9.9 µg/m³	24h	20
2026-05-18	52	42–59	12.8 µg/m³	24h	20
2026-05-17	48	39–55	11.6 µg/m³	23h	19
2026-05-16	54	38–70	14.0 µg/m³	20h	18

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