What is the air quality trend in Honchō?

Over the past 8 days, Honchō had an average AQI of 45 based on station measurements. The worst day was 2026-10-16 with AQI 56.

How is Honchō air quality measured?

Air quality in Honchō 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 Honchō, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 107 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-10-21	31	30–31	7.4 µg/m³	13.7	6h	117
2026-10-20	45	31–78	11.3 µg/m³	21.2	24h	107
2026-10-19	46	35–60	11.2 µg/m³	14.4	24h	105
2026-10-18	35	26–47	8.3 µg/m³	10.0	24h	114
2026-10-17	46	38–57	11.0 µg/m³	12.0	24h	109
2026-10-16	56	40–79	14.8 µg/m³	15.6	24h	95
2026-10-15	48	35–74	12.0 µg/m³	12.6	24h	101
2026-10-14	54	24–89	15.1 µg/m³	6.4	15h	89

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