What is the air quality trend in Yamatokōriyama?

Over the past 8 days, Yamatokōriyama had an average AQI of 64 based on station measurements. The worst day was 2026-10-14 with AQI 92.

How is Yamatokōriyama air quality measured?

Air quality in Yamatokōriyama 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 Yamatokōriyama, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 76 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	44	30–71	11.4 µg/m³	8h	67
2026-10-20	50	30–85	13.3 µg/m³	24h	63
2026-10-19	62	37–95	17.9 µg/m³	24h	59
2026-10-18	36	27–57	8.8 µg/m³	24h	62
2026-10-17	67	33–126	20.0 µg/m³	24h	60
2026-10-16	76	50–157	23.9 µg/m³	24h	54
2026-10-15	86	52–157	28.5 µg/m³	24h	67
2026-10-14	92	30–152	31.1 µg/m³	14h	51

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