What is the air quality trend in Tonami?

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

How is Tonami air quality measured?

Air quality in Tonami 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 Tonami, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

329h

PM2.5 Station

329h · 9 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	32	27–41	7.7 µg/m³	6h	13
2026-08-07	33	28–50	8.0 µg/m³	21h	12
2026-08-06	47	28–84	11.9 µg/m³	24h	6
2026-08-05	41	18–56	10.0 µg/m³	24h	6
2026-08-04	44	25–60	10.8 µg/m³	24h	10
2026-08-03	38	23–53	9.2 µg/m³	24h	10
2026-08-02	42	25–56	10.4 µg/m³	24h	11
2026-08-01	52	37–72	13.3 µg/m³	24h	11
2026-07-31	48	34–68	12.0 µg/m³	24h	11
2026-07-30	46	36–55	11.1 µg/m³	23h	11
2026-07-29	38	23–61	9.3 µg/m³	24h	11
2026-07-28	36	24–53	8.6 µg/m³	24h	11
2026-07-27	36	24–48	8.5 µg/m³	24h	13
2026-07-26	38	22–52	9.0 µg/m³	24h	12
2026-07-25	36	22–46	8.5 µg/m³	15h	11

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