What is the air quality trend in Katsuren-haebaru?

Over the past 8 days, Katsuren-haebaru had an average AQI of 26 based on station measurements. The worst day was 2026-09-21 with AQI 32.

How is Katsuren-haebaru air quality measured?

Air quality in Katsuren-haebaru 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 Katsuren-haebaru, Japan

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

Historical PM2.5 and AQI trend from monitoring stations near Katsuren-haebaru, Japan.

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

139h

PM2.5 Station

139h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-09-23	31	9–63	7.7 µg/m³	19h	1
2026-09-22	31	11–53	7.5 µg/m³	20h	1
2026-09-21	32	8–75	8.2 µg/m³	14h	1
2026-09-20	22	8–46	5.2 µg/m³	20h	2
2026-09-19	26	9–48	6.2 µg/m³	22h	1
2026-09-18	25	3–53	6.1 µg/m³	21h	2
2026-09-17	25	13–42	6.0 µg/m³	21h	1
2026-09-16	16	15–18	3.9 µg/m³	2h	2

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