What is the air quality trend in Nagasaki?

Over the past 21 days, Nagasaki had an average AQI of 39 based on station measurements. The worst day was 2026-10-13 with AQI 51.

How is Nagasaki air quality measured?

Air quality in Nagasaki 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 Nagasaki, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

478h

PM2.5 Station

478h · 18 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	32	25–42	7.8 µg/m³	10h	21
2026-10-20	40	27–53	9.7 µg/m³	24h	18
2026-10-19	36	27–48	8.8 µg/m³	24h	18
2026-10-18	34	23–48	8.2 µg/m³	24h	19
2026-10-17	44	27–53	10.5 µg/m³	24h	19
2026-10-16	48	28–93	12.6 µg/m³	24h	18
2026-10-15	38	24–56	9.1 µg/m³	24h	17
2026-10-14	46	25–173	14.0 µg/m³	24h	18
2026-10-13	51	32–122	13.1 µg/m³	24h	17
2026-10-12	38	22–54	9.2 µg/m³	24h	17
2026-10-11	47	25–113	12.4 µg/m³	24h	16
2026-10-10	35	28–42	8.4 µg/m³	24h	17
2026-10-09	37	24–59	9.0 µg/m³	24h	16
2026-10-08	34	25–46	8.3 µg/m³	24h	20
2026-10-07	37	25–56	9.0 µg/m³	24h	20
2026-10-06	38	28–52	9.2 µg/m³	24h	19
2026-10-05	39	24–57	9.3 µg/m³	24h	19
2026-10-04	36	26–55	8.8 µg/m³	24h	18
2026-10-03	36	25–44	8.7 µg/m³	24h	20
2026-10-02	40	23–155	10.6 µg/m³	24h	19
2026-10-01	35	30–42	8.4 µg/m³	12h	22

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