What is the air quality trend in Hirado?

Over the past 20 days, Hirado had an average AQI of 38 based on station measurements. The worst day was 2026-05-15 with AQI 54.

How is Hirado air quality measured?

Air quality in Hirado 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 Hirado, Japan

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

473h

PM2.5 Station

473h · 9 stations

Temperature GFS model

79pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-29	35	25–52	8.4 µg/m³	23h	8
2026-05-28	29	19–43	7.0 µg/m³	24h	8
2026-05-27	27	17–44	6.4 µg/m³	24h	10
2026-05-26	32	18–48	7.8 µg/m³	24h	8
2026-05-25	31	22–41	7.4 µg/m³	24h	9
2026-05-24	31	22–61	7.5 µg/m³	24h	9
2026-05-23	32	16–48	7.8 µg/m³	24h	10
2026-05-22	27	14–39	6.6 µg/m³	24h	9
2026-05-21	29	16–59	7.1 µg/m³	24h	7
2026-05-20	34	20–48	8.0 µg/m³	24h	10
2026-05-19	43	29–60	10.5 µg/m³	24h	10
2026-05-18	54	38–63	13.6 µg/m³	24h	9
2026-05-17	52	40–78	13.4 µg/m³	23h	9
2026-05-16	53	37–62	13.5 µg/m³	21h	8
2026-05-15	54	44–60	13.5 µg/m³	24h	7
2026-05-14	50	41–56	12.3 µg/m³	24h	8
2026-05-13	38	24–47	9.1 µg/m³	24h	9
2026-05-12	33	20–44	7.8 µg/m³	24h	9
2026-05-11	46	10–74	12.0 µg/m³	23h	7
2026-05-10	39	27–59	9.5 µg/m³	23h	9

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