What is the air quality trend in Unnan?

Over the past 7 days, Unnan had an average AQI of 37 based on station measurements. The worst day was with AQI .

How is Unnan air quality measured?

Air quality in Unnan 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 Unnan, Japan

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

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

Current AQI
Good

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Trend

144h

PM2.5 Trend

144h · 7 stations

Daily Summary

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-04-25	40	32–52	9.5 µg/m³	19h	6
2026-04-24	33	21–41	8.0 µg/m³	23h	5
2026-04-23	28	9–41	6.7 µg/m³	24h	6
2026-04-22	42	25–58	10.1 µg/m³	24h	6
2026-04-21	39	20–54	9.4 µg/m³	24h	5
2026-04-20	38	28–54	9.2 µg/m³	15h	5
2026-04-19	44	36–56	10.7 µg/m³	15h	5

Back to Unnan Air Quality