What is the air quality trend in Hannan?

Over the past 15 days, Hannan had an average AQI of 35 based on station measurements. The worst day was 2026-05-31 with AQI 55.

How is Hannan air quality measured?

Air quality in Hannan 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 Hannan, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

335h

PM2.5 Station

335h · 56 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-06-09	37	25–50	8.8 µg/m³	8h	40
2026-06-08	28	22–35	6.6 µg/m³	24h	49
2026-06-07	28	21–37	6.7 µg/m³	24h	48
2026-06-06	35	28–48	8.5 µg/m³	24h	51
2026-06-05	33	26–41	7.9 µg/m³	24h	52
2026-06-04	31	21–51	7.5 µg/m³	24h	46
2026-06-03	29	22–40	7.0 µg/m³	24h	47
2026-06-02	28	19–41	6.7 µg/m³	24h	47
2026-06-01	47	28–61	12.0 µg/m³	24h	38
2026-05-31	55	44–73	14.2 µg/m³	24h	36
2026-05-30	48	39–104	12.1 µg/m³	24h	40
2026-05-29	41	32–53	9.9 µg/m³	24h	37
2026-05-28	36	24–53	8.6 µg/m³	24h	38
2026-05-27	32	21–48	7.7 µg/m³	24h	44
2026-05-26	31	25–37	7.4 µg/m³	15h	43

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