What is the air quality trend in Yilan?

Over the past 8 days, Yilan had an average AQI of 74 based on station measurements. The worst day was 2026-10-14 with AQI 83.

How is Yilan air quality measured?

Air quality in Yilan 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 Yilan, Taiwan

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

Historical PM2.5 and AQI trend from monitoring stations near Yilan, Taiwan.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 25 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	63	49–76	17.9 µg/m³	3h	20
2026-10-20	70	41–106	21.2 µg/m³	24h	14
2026-10-19	72	43–130	21.8 µg/m³	24h	12
2026-10-18	79	38–167	26.1 µg/m³	24h	15
2026-10-17	75	36–152	23.3 µg/m³	24h	10
2026-10-16	71	25–100	21.9 µg/m³	24h	10
2026-10-15	82	58–128	26.6 µg/m³	23h	10
2026-10-14	83	46–118	27.2 µg/m³	19h	7

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