What is the air quality trend in Sennan?

Over the past 8 days, Sennan had an average AQI of 53 based on station measurements. The worst day was 2026-10-15 with AQI 69.

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

166h

PM2.5 Station

166h · 53 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	37	29–45	8.8 µg/m³	10h	66
2026-10-20	51	32–103	13.8 µg/m³	24h	61
2026-10-19	53	38–87	13.9 µg/m³	24h	58
2026-10-18	37	25–57	8.9 µg/m³	24h	61
2026-10-17	55	38–89	15.2 µg/m³	24h	60
2026-10-16	67	50–155	19.8 µg/m³	24h	49
2026-10-15	69	30–155	21.2 µg/m³	24h	56
2026-10-14	59	34–109	17.0 µg/m³	12h	47

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