What is the air quality trend in Minamiuonuma?

Over the past 15 days, Minamiuonuma had an average AQI of 31 based on station measurements. The worst day was 2026-08-28 with AQI 44.

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

308h

PM2.5 Station

308h · 3 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-09-05	29	15–50	6.9 µg/m³	17h	3
2026-09-04	26	12–56	6.2 µg/m³	23h	2
2026-09-03	19	12–36	4.6 µg/m³	21h	2
2026-09-02	31	7–69	7.7 µg/m³	22h	2
2026-09-01	27	12–44	6.5 µg/m³	22h	2
2026-08-31	39	17–165	11.3 µg/m³	23h	2
2026-08-30	39	9–155	11.8 µg/m³	22h	2
2026-08-29	22	5–44	5.3 µg/m³	22h	2
2026-08-28	44	17–72	11.3 µg/m³	21h	2
2026-08-27	28	14–64	6.8 µg/m³	20h	2
2026-08-26	31	12–72	7.6 µg/m³	23h	2
2026-08-25	37	13–58	8.9 µg/m³	23h	3
2026-08-24	40	23–56	9.8 µg/m³	22h	2
2026-08-23	37	21–55	8.9 µg/m³	23h	3
2026-08-22	25	17–44	6.0 µg/m³	4h	2

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