What is the air quality trend in Hidaka?

Over the past 8 days, Hidaka had an average AQI of 50 based on station measurements. The worst day was 2026-07-21 with AQI 59.

How is Hidaka air quality measured?

Air quality in Hidaka 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 Hidaka, Japan

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

167h

PM2.5 Station

167h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-07-22	53	53–53	13.1 µg/m³	—	1h	2
2026-07-21	59	53–64	15.9 µg/m³	34.1	24h	43
2026-07-20	52	41–58	13.0 µg/m³	21.2	24h	59
2026-07-19	40	31–50	9.6 µg/m³	11.7	24h	61
2026-07-18	40	28–52	9.5 µg/m³	9.7	24h	61
2026-07-17	51	36–59	12.8 µg/m³	24.9	24h	61
2026-07-16	58	53–66	15.7 µg/m³	38.6	24h	60
2026-07-15	54	48–60	13.6 µg/m³	33.1	22h	63

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