What is the air quality trend in Ōkubo-naka?

Over the past 8 days, Ōkubo-naka had an average AQI of 62 based on station measurements. The worst day was 2026-10-14 with AQI 78.

How is Ōkubo-naka air quality measured?

Air quality in Ōkubo-naka 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 Ōkubo-naka, Japan

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

Historical PM2.5 and AQI trend from monitoring stations near Ōkubo-naka, Japan.

105

Current AQI
Unhealthy for sensitive groups Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 74 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	49	30–77	13.3 µg/m³	12h	62
2026-10-20	57	35–93	15.8 µg/m³	24h	59
2026-10-19	59	38–80	16.2 µg/m³	24h	56
2026-10-18	51	28–103	13.9 µg/m³	24h	59
2026-10-17	60	38–76	16.8 µg/m³	24h	56
2026-10-16	67	51–91	19.5 µg/m³	24h	51
2026-10-15	76	46–119	23.7 µg/m³	24h	58
2026-10-14	78	41–117	25.4 µg/m³	10h	51

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