What is the air quality trend in Yilan?

Over the past 8 days, Yilan had an average AQI of 73 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

164h

PM2.5 Station

164h · 20 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	60	52–75	16.2 µg/m³	4h	17
2026-10-20	71	41–127	21.4 µg/m³	24h	13
2026-10-19	70	38–133	21.2 µg/m³	24h	11
2026-10-18	79	42–161	25.8 µg/m³	24h	14
2026-10-17	73	34–133	22.5 µg/m³	24h	10
2026-10-16	70	34–118	21.0 µg/m³	24h	10
2026-10-15	82	56–124	26.5 µg/m³	23h	10
2026-10-14	83	44–143	27.0 µg/m³	17h	7

Back to Yilan Air Quality