What is the air quality trend in Toyama?

Over the past 8 days, Toyama had an average AQI of 52 based on station measurements. The worst day was 2026-07-22 with AQI 73.

How is Toyama air quality measured?

Air quality in Toyama 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 Toyama, Japan

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

146h

PM2.5 Station

146h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	73	73–73	22.6 µg/m³	2h	2
2026-07-21	56	10–82	15.8 µg/m³	18h	2
2026-07-20	54	30–78	14.7 µg/m³	18h	3
2026-07-19	42	14–72	10.7 µg/m³	22h	2
2026-07-18	42	17–80	11.1 µg/m³	23h	2
2026-07-17	50	8–74	13.0 µg/m³	22h	2
2026-07-16	52	17–76	13.7 µg/m³	21h	2
2026-07-15	53	25–89	14.2 µg/m³	20h	2

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