What is the air quality trend in Hōjō?

Over the past 15 days, Hōjō had an average AQI of 43 based on station measurements. The worst day was 2026-10-13 with AQI 56.

How is Hōjō air quality measured?

Air quality in Hōjō 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 Hōjō, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

334h

PM2.5 Station

334h · 24 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	31	25–40	7.5 µg/m³	10h	25
2026-10-20	45	26–159	12.5 µg/m³	24h	22
2026-10-19	40	27–58	9.6 µg/m³	24h	20
2026-10-18	33	23–46	7.9 µg/m³	24h	22
2026-10-17	46	29–73	11.3 µg/m³	24h	20
2026-10-16	53	38–115	14.2 µg/m³	24h	17
2026-10-15	41	25–91	10.5 µg/m³	24h	19
2026-10-14	50	19–169	15.2 µg/m³	24h	17
2026-10-13	56	30–155	15.6 µg/m³	24h	18
2026-10-12	45	30–57	11.0 µg/m³	24h	20
2026-10-11	52	28–80	13.9 µg/m³	24h	15
2026-10-10	37	25–52	8.9 µg/m³	24h	18
2026-10-09	41	25–63	10.0 µg/m³	24h	19
2026-10-08	36	20–49	8.7 µg/m³	24h	24
2026-10-07	41	30–54	9.9 µg/m³	12h	22

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