What is the air quality trend in Hirakawa?

Over the past 15 days, Hirakawa had an average AQI of 47 based on station measurements. The worst day was 2026-10-16 with AQI 87.

How is Hirakawa air quality measured?

Air quality in Hirakawa 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 Hirakawa, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

254h

PM2.5 Station

254h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	34	17–57	8.3 µg/m³	6h	2
2026-10-20	30	9–68	7.7 µg/m³	17h	2
2026-10-19	33	13–64	8.1 µg/m³	14h	2
2026-10-18	32	11–84	8.1 µg/m³	20h	2
2026-10-17	54	15–167	16.6 µg/m³	20h	2
2026-10-16	87	15–179	37.5 µg/m³	16h	1
2026-10-15	29	13–53	7.1 µg/m³	17h	1
2026-10-14	66	17–168	23.7 µg/m³	20h	2
2026-10-13	67	17–156	21.6 µg/m³	17h	2
2026-10-12	41	11–76	10.8 µg/m³	17h	2
2026-10-11	62	14–149	17.7 µg/m³	19h	1
2026-10-10	47	12–94	12.4 µg/m³	18h	1
2026-10-09	44	15–90	11.7 µg/m³	17h	1
2026-10-08	33	8–56	8.0 µg/m³	24h	2
2026-10-07	50	21–84	14.0 µg/m³	12h	2

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