What is the air quality trend in Toyohama?

Over the past 15 days, Toyohama had an average AQI of 31 based on station measurements. The worst day was 2026-05-31 with AQI 53.

How is Toyohama air quality measured?

Air quality in Toyohama 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 Toyohama, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

334h

PM2.5 Station

334h · 1 station

Temperature GFS model

55pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-06-09	29	9–38	6.9 µg/m³	9.2	18h	20
2026-06-08	25	20–32	6.0 µg/m³	6.4	24h	23
2026-06-07	26	13–38	6.2 µg/m³	8.2	24h	24
2026-06-06	33	25–45	7.8 µg/m³	12.9	24h	24
2026-06-05	29	24–35	7.0 µg/m³	14.6	24h	24
2026-06-04	27	20–37	6.6 µg/m³	6.9	24h	23
2026-06-03	26	19–32	6.2 µg/m³	8.1	24h	23
2026-06-02	24	15–35	5.7 µg/m³	6.0	24h	24
2026-06-01	42	27–61	10.4 µg/m³	12.1	23h	23
2026-05-31	53	39–66	13.4 µg/m³	17.6	24h	21
2026-05-30	43	33–53	10.2 µg/m³	11.9	24h	23
2026-05-29	37	31–50	9.0 µg/m³	9.4	24h	22
2026-05-28	28	18–48	6.6 µg/m³	6.9	24h	21
2026-05-27	25	18–37	6.0 µg/m³	7.7	24h	23
2026-05-26	31	23–41	7.3 µg/m³	8.8	5h	24

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