What is the air quality trend in Unnan?

Over the past 15 days, Unnan had an average AQI of 41 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

295h

PM2.5 Trend

295h · 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
2026-04-18	55	32–258	21.2 µg/m³	19h	7
2026-04-17	44	33–59	10.8 µg/m³	16h	6
2026-04-16	45	32–71	11.1 µg/m³	24h	6
2026-04-15	36	9–59	8.8 µg/m³	24h	5
2026-04-14	46	18–57	11.3 µg/m³	24h	5
2026-04-13	50	33–60	12.4 µg/m³	16h	5
2026-04-12	43	28–64	10.5 µg/m³	24h	5
2026-04-11	43	32–54	10.3 µg/m³	4h	4

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