What is the air quality trend in Matsubase?

Over the past 15 days, Matsubase had an average AQI of 40 based on station measurements. The worst day was 2026-08-01 with AQI 53.

How is Matsubase air quality measured?

Air quality in Matsubase 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 Matsubase, Japan

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

331h

PM2.5 Station

331h · 15 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	28	20–34	6.8 µg/m³	6h	13
2026-08-07	30	22–52	7.1 µg/m³	22h	14
2026-08-06	52	21–76	13.9 µg/m³	24h	7
2026-08-05	46	22–152	12.4 µg/m³	24h	6
2026-08-04	39	20–60	9.5 µg/m³	24h	10
2026-08-03	39	24–56	9.4 µg/m³	24h	10
2026-08-02	44	24–58	10.7 µg/m³	24h	10
2026-08-01	53	31–64	13.7 µg/m³	24h	12
2026-07-31	48	38–59	11.7 µg/m³	24h	12
2026-07-30	48	31–61	11.7 µg/m³	23h	12
2026-07-29	40	20–60	9.7 µg/m³	24h	11
2026-07-28	37	22–56	8.9 µg/m³	24h	11
2026-07-27	36	26–53	8.5 µg/m³	24h	12
2026-07-26	34	23–55	8.1 µg/m³	24h	13
2026-07-25	40	29–62	9.7 µg/m³	16h	12

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