What is the air quality trend in Hirokawa?

Over the past 8 days, Hirokawa had an average AQI of 39 based on station measurements. The worst day was 2026-08-06 with AQI 50.

How is Hirokawa air quality measured?

Air quality in Hirokawa 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 Hirokawa, Japan

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

162h

PM2.5 Station

162h · 25 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	27	24–30	6.5 µg/m³	2h	24
2026-08-07	31	22–50	7.4 µg/m³	22h	19
2026-08-06	50	25–77	12.7 µg/m³	23h	11
2026-08-05	41	18–58	10.1 µg/m³	23h	9
2026-08-04	38	29–46	9.1 µg/m³	24h	16
2026-08-03	40	26–54	9.6 µg/m³	24h	16
2026-08-02	43	28–55	10.5 µg/m³	24h	17
2026-08-01	48	24–59	12.1 µg/m³	20h	19

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