What is the air quality trend in Ōta?

Over the past 8 days, Ōta had an average AQI of 50 based on station measurements. The worst day was 2026-10-16 with AQI 59.

How is Ōta air quality measured?

Air quality in Ōta 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 Ōta, Japan

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 16 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	40	32–53	9.8 µg/m³	4h	18
2026-10-20	48	27–112	12.7 µg/m³	24h	19
2026-10-19	51	35–91	13.6 µg/m³	24h	18
2026-10-18	36	22–60	8.8 µg/m³	24h	18
2026-10-17	52	37–102	13.6 µg/m³	24h	19
2026-10-16	59	35–99	16.4 µg/m³	24h	15
2026-10-15	57	25–123	16.1 µg/m³	24h	18
2026-10-14	57	30–127	16.0 µg/m³	17h	17

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