What is the air quality trend in Sennan?

Over the past 8 days, Sennan had an average AQI of 68 based on station measurements. The worst day was 2026-10-14 with AQI 101.

How is Sennan air quality measured?

Air quality in Sennan 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 Sennan, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 37 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	45	32–59	11.2 µg/m³	4h	48
2026-10-20	51	29–78	13.1 µg/m³	24h	44
2026-10-19	63	37–114	18.3 µg/m³	24h	40
2026-10-18	44	27–96	11.4 µg/m³	24h	45
2026-10-17	72	37–133	22.1 µg/m³	24h	43
2026-10-16	79	44–158	25.5 µg/m³	24h	38
2026-10-15	90	56–163	30.9 µg/m³	24h	43
2026-10-14	101	41–157	35.6 µg/m³	17h	35

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