What is the air quality trend in Tainan?

Over the past 3 days, Tainan had an average AQI of 73 based on station measurements. The worst day was 2026-10-20 with AQI 85.

How is Tainan air quality measured?

Air quality in Tainan 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 Tainan, Taiwan

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

45h

PM2.5 Station

45h · 7 stations

Temperature GFS model

8pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	58	58–58	15.4 µg/m³	1h	7
2026-10-20	85	51–177	31.5 µg/m³	24h	11
2026-10-19	77	54–170	25.5 µg/m³	20h	8

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