What is the air quality trend in Hayashino?

Over the past 8 days, Hayashino had an average AQI of 47 based on station measurements. The worst day was 2026-10-16 with AQI 60.

How is Hayashino air quality measured?

Air quality in Hayashino 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 Hayashino, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 18 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	42	28–53	10.1 µg/m³	7h	17
2026-10-20	41	24–62	9.9 µg/m³	24h	17
2026-10-19	48	28–111	12.3 µg/m³	24h	16
2026-10-18	34	19–55	8.2 µg/m³	24h	16
2026-10-17	52	30–80	13.6 µg/m³	24h	16
2026-10-16	60	32–128	16.9 µg/m³	24h	14
2026-10-15	52	30–152	14.2 µg/m³	24h	15
2026-10-14	47	23–114	12.8 µg/m³	14h	14

Back to Hayashino Air Quality