What is the air quality trend in Ibaraki?

Over the past 8 days, Ibaraki had an average AQI of 64 based on station measurements. The worst day was 2026-10-14 with AQI 86.

How is Ibaraki air quality measured?

Air quality in Ibaraki 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 Ibaraki, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 66 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	42	33–64	10.6 µg/m³	7h	72
2026-10-20	51	33–80	13.4 µg/m³	24h	68
2026-10-19	61	40–83	17.0 µg/m³	24h	63
2026-10-18	42	29–73	10.4 µg/m³	24h	70
2026-10-17	66	38–121	19.4 µg/m³	24h	66
2026-10-16	78	45–154	25.0 µg/m³	24h	53
2026-10-15	86	51–154	28.4 µg/m³	24h	68
2026-10-14	86	30–153	29.0 µg/m³	14h	53

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