What is the air quality trend in Minamiuonuma?

Over the past 15 days, Minamiuonuma had an average AQI of 42 based on station measurements. The worst day was 2026-10-09 with AQI 57.

How is Minamiuonuma air quality measured?

Air quality in Minamiuonuma 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 Minamiuonuma, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

312h

PM2.5 Station

312h · 2 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	40	20–63	9.9 µg/m³	12h	2
2026-10-20	39	9–62	9.6 µg/m³	22h	2
2026-10-19	35	5–63	8.8 µg/m³	23h	2
2026-10-18	31	7–69	7.7 µg/m³	24h	2
2026-10-17	43	13–78	11.1 µg/m³	22h	2
2026-10-16	48	12–162	14.3 µg/m³	20h	2
2026-10-15	47	13–147	13.3 µg/m³	21h	2
2026-10-14	52	10–172	17.7 µg/m³	20h	2
2026-10-13	46	8–151	12.8 µg/m³	24h	2
2026-10-12	44	12–106	11.6 µg/m³	24h	2
2026-10-11	45	2–117	11.8 µg/m³	22h	2
2026-10-10	41	12–103	10.8 µg/m³	24h	2
2026-10-09	57	21–156	17.3 µg/m³	22h	2
2026-10-08	35	10–65	8.7 µg/m³	23h	2
2026-10-07	35	19–74	9.1 µg/m³	9h	2

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