What is the air quality trend in Onomichi?

Over the past 8 days, Onomichi had an average AQI of 53 based on station measurements. The worst day was with AQI .

How is Onomichi air quality measured?

Air quality in Onomichi 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 Onomichi, Japan

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

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

Current AQI
Good

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Trend

130h

PM2.5 Trend

130h · 2 stations

Daily Summary

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-04-15	49	23–63	12.6 µg/m³	15.4	7h	2
2026-04-14	58	40–76	16.1 µg/m³	18.4	23h	2
2026-04-13	67	59–85	19.9 µg/m³	23.0	16h	2
2026-04-12	64	44–78	18.5 µg/m³	20.5	23h	2
2026-04-11	50	40–57	12.2 µg/m³	13.2	23h	2
2026-04-10	37	17–56	9.0 µg/m³	12.3	23h	2
2026-04-09	48	27–67	12.4 µg/m³	13.6	14h	2
2026-04-08	57	57–57	15.0 µg/m³	16.0	1h	2

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