What is the air quality trend in Jōyō?

Over the past 8 days, Jōyō had an average AQI of 66 based on station measurements. The worst day was 2026-10-14 with AQI 96.

How is Jōyō air quality measured?

Air quality in Jōyō 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 Jōyō, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 48 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	46	30–68	12.0 µg/m³	4h	63
2026-10-20	51	31–75	12.9 µg/m³	24h	59
2026-10-19	62	38–95	17.9 µg/m³	24h	53
2026-10-18	42	27–77	10.5 µg/m³	24h	60
2026-10-17	68	37–110	20.4 µg/m³	24h	56
2026-10-16	77	46–144	24.3 µg/m³	24h	48
2026-10-15	88	58–158	29.4 µg/m³	24h	55
2026-10-14	96	50–155	33.2 µg/m³	17h	50

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