What is the air quality trend in Hualien City?

Over the past 8 days, Hualien City had an average AQI of 53 based on station measurements. The worst day was 2026-07-18 with AQI 73.

How is Hualien City air quality measured?

Air quality in Hualien City 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 Hualien City, Taiwan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

90h

PM2.5 Station

90h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	46	30–61	12.0 µg/m³	2h	1
2026-07-21	60	25–109	17.5 µg/m³	10h	1
2026-07-20	66	24–157	20.8 µg/m³	10h	1
2026-07-19	41	8–74	10.8 µg/m³	12h	1
2026-07-18	73	48–124	22.6 µg/m³	11h	1
2026-07-17	50	19–94	13.6 µg/m³	16h	1
2026-07-16	51	6–116	14.3 µg/m³	16h	1
2026-07-15	42	13–65	10.4 µg/m³	13h	1

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