What is the air quality trend in Alor Setar?

Over the past 8 days, Alor Setar had an average AQI of 90 based on station measurements. The worst day was 2026-10-15 with AQI 114.

How is Alor Setar air quality measured?

Air quality in Alor Setar 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 Alor Setar, Malaysia

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

Historical PM2.5 and AQI trend from monitoring stations near Alor Setar, Malaysia.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

145h

PM2.5 Station

145h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-20	98	25–500	73.2 µg/m³	19h	2
2026-10-19	97	30–301	39.8 µg/m³	21h	2
2026-10-18	80	23–172	28.6 µg/m³	23h	2
2026-10-17	104	48–436	51.3 µg/m³	18h	2
2026-10-16	93	37–152	31.6 µg/m³	20h	2
2026-10-15	114	42–406	57.9 µg/m³	22h	2
2026-10-14	87	10–171	31.6 µg/m³	21h	2
2026-10-13	52	52–52	12.6 µg/m³	1h	1

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