What is the air quality trend in Ono?

Over the past 8 days, Ono had an average AQI of 61 based on station measurements. The worst day was 2026-10-14 with AQI 87.

How is Ono air quality measured?

Air quality in Ono 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 Ono, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 54 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	40	32–53	9.5 µg/m³	6h	46
2026-10-20	49	33–84	12.7 µg/m³	24h	45
2026-10-19	57	39–88	15.5 µg/m³	24h	42
2026-10-18	40	28–69	9.8 µg/m³	24h	45
2026-10-17	60	39–91	16.8 µg/m³	24h	43
2026-10-16	76	42–165	24.7 µg/m³	24h	38
2026-10-15	79	51–156	25.2 µg/m³	24h	45
2026-10-14	87	27–132	28.9 µg/m³	15h	38

Back to Ono Air Quality