What is the air quality trend in Tokyo?

Over the past 2 days, Tokyo had an average AQI of 70 based on station measurements. The worst day was 2026-07-20 with AQI 71.

How is Tokyo air quality measured?

Air quality in Tokyo 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 Tokyo, Japan

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

PM2.5 Station

6h · 1 station

Temperature GFS model

7pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-07-21	69	10–87	22.3 µg/m³	28.9	5h	1
2026-07-20	71	71–71	21.6 µg/m³	23.9	1h	1

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