What is the air quality trend in Tokyo?

Over the past 12 days, Tokyo had an average AQI of 36 based on station measurements. The worst day was 2026-08-01 with AQI 100.

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
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

186h

PM2.5 Station

186h · 2 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	18	18–18	4.4 µg/m³	1h	2
2026-08-07	11	1–27	2.6 µg/m³	6h	1
2026-08-06	10	1–40	2.3 µg/m³	15h	2
2026-08-05	20	1–39	4.9 µg/m³	18h	1
2026-08-04	26	6–62	6.5 µg/m³	24h	1
2026-08-03	19	5–38	4.5 µg/m³	23h	1
2026-08-02	36	1–103	10.7 µg/m³	17h	1
2026-08-01	100	68–121	34.6 µg/m³	24h	1
2026-07-31	79	54–103	25.6 µg/m³	24h	1
2026-07-30	57	12–82	16.5 µg/m³	24h	1
2026-07-29	20	6–35	4.9 µg/m³	9h	1
2026-07-26	40	40–40	9.6 µg/m³	1h	1

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