What is the air quality trend in Maruobara?

Over the past 8 days, Maruobara had an average AQI of 51 based on station measurements. The worst day was 2026-10-14 with AQI 93.

How is Maruobara air quality measured?

Air quality in Maruobara 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 Maruobara, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

164h

PM2.5 Station

164h · 15 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	29	24–33	7.0 µg/m³	7h	20
2026-10-20	40	25–82	10.4 µg/m³	24h	17
2026-10-19	51	25–155	14.6 µg/m³	24h	14
2026-10-18	32	17–48	7.8 µg/m³	24h	19
2026-10-17	44	28–79	11.2 µg/m³	24h	13
2026-10-16	63	31–164	19.0 µg/m³	23h	14
2026-10-15	62	27–157	19.2 µg/m³	24h	14
2026-10-14	93	28–167	34.0 µg/m³	14h	13

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