What is the air quality trend in Tōno?

Over the past 8 days, Tōno had an average AQI of 59 based on station measurements. The worst day was 2026-10-15 with AQI 90.

How is Tōno air quality measured?

Air quality in Tōno 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 Tōno, Japan

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

158h

PM2.5 Station

158h · 7 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	40	10–135	11.6 µg/m³	9h	4
2026-10-20	49	18–154	14.0 µg/m³	24h	3
2026-10-19	50	23–98	14.0 µg/m³	23h	3
2026-10-18	34	12–64	8.3 µg/m³	22h	3
2026-10-17	70	20–291	27.5 µg/m³	24h	3
2026-10-16	75	27–224	29.1 µg/m³	23h	3
2026-10-15	90	12–471	44.0 µg/m³	22h	3
2026-10-14	66	29–111	20.1 µg/m³	11h	3

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