What is the air quality trend in Ōmachi?

Over the past 15 days, Ōmachi had an average AQI of 40 based on station measurements. The worst day was 2026-08-01 with AQI 52.

How is Ōmachi air quality measured?

Air quality in Ōmachi 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 Ōmachi, Japan

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

306h

PM2.5 Station

306h · 5 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	36	32–40	8.8 µg/m³	4h	4
2026-08-07	32	17–58	7.8 µg/m³	19h	3
2026-08-06	50	21–72	13.0 µg/m³	20h	2
2026-08-05	50	7–171	18.0 µg/m³	18h	2
2026-08-04	39	18–122	10.6 µg/m³	20h	3
2026-08-03	43	16–122	11.3 µg/m³	23h	3
2026-08-02	39	7–61	9.6 µg/m³	24h	2
2026-08-01	52	20–109	13.8 µg/m³	23h	3
2026-07-31	51	25–63	12.8 µg/m³	23h	3
2026-07-30	45	21–61	11.1 µg/m³	22h	2
2026-07-29	34	14–55	8.2 µg/m³	23h	3
2026-07-28	30	7–63	7.3 µg/m³	24h	3
2026-07-27	33	8–62	8.1 µg/m³	23h	3
2026-07-26	36	18–67	9.0 µg/m³	24h	3
2026-07-25	37	11–58	8.9 µg/m³	16h	3

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