21 – 27 Oct 2026 · Malaysia

Malaysia weekly air quality

US AQI · PM2.5 · 24-hour source averages

94.1Weekly mean AQI · Moderate

Official DOE API mean: 80.6. Calculated separately from reported official observations.

Each DOE observation identified as PM2.5 is converted using the published API formula and US AQI breakpoints. This is not an official all-pollutant AQI or NowCast. Calculation details

11303 eligible observations · 121 excluded.

-27.4 AQI compared with the previous week’s eligible mean of 121.5.

Peak AQI: 220 at IPD Serian · 25 Oct 2026, 15:00 (UTC+8).

Daily US AQI (PM2.5)

Low 16High 220AQI

21 Oct27 Oct

27 OctDaily mean · Peak 15268.6Avg AQI

Based on 1608 hourly readings.

24 observations excluded because their pollutant is unknown or unsupported.

Daily and hourly means use eligible observations across the selected locations. Each observation uses a 24-hour PM2.5 average.

Export AQI CSV

Means and peaks use only converted observations. Missing days remain gaps.

Day	Mean AQI	Peak AQI	Eligible / excluded
2026-10-21	103.8Unhealthy for Sensitive Groups	182	1632 / 0
2026-10-22	101.2Unhealthy for Sensitive Groups	175	1632 / 0
2026-10-23	102.3Unhealthy for Sensitive Groups	166	1632 / 0
2026-10-24	110.4Unhealthy for Sensitive Groups	189	1632 / 0
2026-10-25	98Moderate	220	1602 / 30
2026-10-26	73Moderate	196	1565 / 67
2026-10-27	68.6Moderate	152	1608 / 24

Hourly means (UTC+8)

Day	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
2026-10-21	109.1	108.3	107.5	106.9	106.3	105.7	105.3	104.9	104.5	104.2	103.8	103.3	103.1	102.4	102	101.7	101.6	101.4	101.5	101.5	101.6	101.8	101.9	101.8
2026-10-22	101.7	101.8	101.8	101.6	101.7	101.7	101.5	101.3	101.1	101.1	101.4	101.4	101.2	101.4	101.5	101.3	101.1	101.2	101	100.7	100.5	100.2	100.3	100.4
2026-10-23	100.8	101.1	101.2	101.4	101.4	101.5	101.3	101.3	101.1	101.1	101.2	101.1	101.6	101.9	102.1	102.3	102.9	103.1	103.6	103.8	104.4	104.8	105.2	105.5
2026-10-24	106	106.5	106.9	107.7	107.9	108.7	109.5	110.4	110.9	111.3	111.6	111.9	112.1	111.9	112	111.8	111.7	111.5	111.6	111.7	111.8	111.8	111.6	111.5
2026-10-25	111	110.2	109.2	108.2	107.1	105.5	104	102.2	100.9	99.4	98	97.2	97.2	96.1	95.1	96	94.5	93.1	92.6	90.8	89.1	86.2	83.5	80.8
2026-10-26	80	78	77.3	76.4	75.7	74.9	75.2	74.7	74.2	75.3	73.9	73	72.6	72	71.1	70.4	69.8	69.9	69.8	70	70.2	69.6	69.4	68.2
2026-10-27	67.8	68.5	67.8	67.9	68.1	68.3	68.3	68.4	68.5	68.6	68.9	68.9	68.8	68.7	68.4	68.9	68.8	69.3	70	69.8	68.8	69.1	68.7	68.5

Observation categories

Good: 787

Moderate: 6495

Unhealthy for Sensitive Groups: 2310

Unhealthy: 1690

Very Unhealthy: 21

Hazardous: 0

US AQI scale
AQI	Category
0–50	Good
51–100	Moderate
101–150	Unhealthy for Sensitive Groups
151–200	Unhealthy
201–300	Very Unhealthy
301+	Hazardous

Stations by US AQI

Sorted by eligible mean AQI. Counts show the available coverage.

Location	Mean AQI	Peak AQI	Official DOE API mean	Eligible / excluded
Nilai	137.3Unhealthy for Sensitive Groups	173	129.5	168 / 0
Batu Muda	137.1Unhealthy for Sensitive Groups	167	127.5	168 / 0
Batu Pahat	134.6Unhealthy for Sensitive Groups	171	120.4	168 / 0
IPD Serian	134.5Unhealthy for Sensitive Groups	220	118	168 / 0
Seremban	134.2Unhealthy for Sensitive Groups	179	127.1	168 / 0
Kluang	131.4Unhealthy for Sensitive Groups	170	111.9	168 / 0
Pasir Gudang	129.2Unhealthy for Sensitive Groups	169	115.5	168 / 0
Sri Aman	128Unhealthy for Sensitive Groups	165	116.4	168 / 0
Bukit Rambai	124.8Unhealthy for Sensitive Groups	182	116.6	168 / 0
Tangkak	124.7Unhealthy for Sensitive Groups	167	116.4	168 / 0
Larkin	123.8Unhealthy for Sensitive Groups	177	109.3	168 / 0
JOHAN SETIA	121.5Unhealthy for Sensitive Groups	173	109.9	168 / 0
Samarahan	120.9Unhealthy for Sensitive Groups	194	104.9	168 / 0
Bandaraya Melaka	118.9Unhealthy for Sensitive Groups	170	107.2	165 / 3
Kuching	118.5Unhealthy for Sensitive Groups	203	104.3	168 / 0
Putrajaya	118.3Unhealthy for Sensitive Groups	165	106.8	165 / 3
Klang	117.9Unhealthy for Sensitive Groups	167	109.1	168 / 0
Cheras	116.1Unhealthy for Sensitive Groups	169	102	168 / 0
Alor Gajah	115Unhealthy for Sensitive Groups	160	102.8	168 / 0
Petaling Jaya	114.3Unhealthy for Sensitive Groups	166	105.7	168 / 0
Banting	114.1Unhealthy for Sensitive Groups	166	100.2	164 / 4
Segamat	113.9Unhealthy for Sensitive Groups	156	96.7	168 / 0
Paka	113.9Unhealthy for Sensitive Groups	158	97.5	168 / 0
Shah Alam	111.8Unhealthy for Sensitive Groups	169	102.1	168 / 0
Port Dickson	111.2Unhealthy for Sensitive Groups	158	98.2	168 / 0
Pengerang	110.8Unhealthy for Sensitive Groups	160	92.5	168 / 0
Sibu	108.7Unhealthy for Sensitive Groups	158	90.9	168 / 0
Kota Tinggi	104.8Unhealthy for Sensitive Groups	152	86.3	166 / 2
Bintulu	101.8Unhealthy for Sensitive Groups	130	80	168 / 0
Samalaju	101.1Unhealthy for Sensitive Groups	152	82.8	168 / 0
Rompin	100.4Unhealthy for Sensitive Groups	154	81.7	168 / 0
Sarikei	98.9Moderate	159	84.6	168 / 0
Kapit	97.7Moderate	154	81.8	168 / 0
Seri Manjung	95.2Moderate	130	75.9	168 / 0
Tasek Ipoh	89.4Moderate	128	73.1	168 / 0
Temerloh	89.3Moderate	138	71.7	168 / 0
Keningau	87.9Moderate	132	71.8	168 / 0
Tawau	86Moderate	105	71.2	168 / 0
Mukah	86Moderate	142	70.8	168 / 0
Jerantut	83.4Moderate	126	65.1	161 / 7
Balok Baru Kuantan	82.9Moderate	117	68.8	168 / 0
Seberang Perai	80.4Moderate	99	67.5	168 / 0
Kuala Selangor	79.9Moderate	118	66.1	168 / 0
Indera Mahkota Kuantan	79.8Moderate	115	65.5	168 / 0
Tanjung Malim	78.6Moderate	113	63.5	168 / 0
Pegoh Ipoh	78.3Moderate	122	65.8	168 / 0
Miri	76.8Moderate	107	64.1	168 / 0
Labuan	75.9Moderate	105	64.2	168 / 0
Kemaman	74.2Moderate	120	61.4	168 / 0
ILP Miri	72.9Moderate	105	62.1	168 / 0
Limbang	67.9Moderate	99	56.7	168 / 0
Kuala Terengganu	67.8Moderate	93	57	168 / 0
Politeknik Kota Kinabalu	67.8Moderate	109	57.8	168 / 0
Sandakan	66.4Moderate	80	57	168 / 0
Tanah Merah	65.5Moderate	93	54.4	168 / 0
Kota Kinabalu	64.6Moderate	103	54.6	168 / 0
Seberang Jaya	63.8Moderate	90	52.9	168 / 0
Kota Bharu	63.4Moderate	91	52.9	168 / 0
Taiping	61.6Moderate	94	50.8	168 / 0
Kimanis	60.4Moderate	101	49.4	168 / 0
Sungai Petani	59.7Moderate	83	49.8	168 / 0
Minden	59.5Moderate	83	49.2	168 / 0
Balik Pulau	56.4Moderate	80	42.1	133 / 35
Besut	56.1Moderate	78	46.3	168 / 0
Kulim Hi-Tech	55.3Moderate	86	46.1	166 / 2
Alor Setar	55.1Moderate	75	41.4	134 / 34
Kangar	52.5Moderate	81	42.4	160 / 8
Langkawi	42.8Good	67	32.8	145 / 23

States by US AQI

State	Mean AQI	Official API mean	Eligible / excluded
Negeri Sembilan	127.5	118.3	504 / 0
Kuala Lumpur	126.6	114.7	336 / 0
Johor	121.7	106.1	1342 / 2
Melaka	119.6	108.9	501 / 3
Putrajaya	118.3	106.8	165 / 3
Selangor	109.9	98.9	1004 / 4
Sarawak	101	86	2184 / 0
Pahang	87.2	70.6	833 / 7
Perak	80.6	65.8	840 / 0
Terengganu	78	65.5	672 / 0
Labuan	75.9	64.2	168 / 0
Sabah	72.2	60.3	1008 / 0
Penang	65.5	52.9	637 / 35
Kelantan	64.5	53.7	336 / 0
Kedah	53.5	42.5	613 / 59
Perlis	52.5	42.4	160 / 8

Malaysia air quality.
The week in review.

21 – 27 Oct 20267 days · Malaysia Time

Laporan mingguan Indeks Pencemaran Udara (IPU) dan jerebu Malaysia

During the week of 21 – 27 Oct 2026, Malaysia recorded an overall average Air Pollutant Index (API) of 80.6 (Moderate).

National weekly average

80.6API

Moderate · Sederhana

28.1 API cleaner than the week before, which averaged 108.7

Daily averages56.6 – 97 APIWed → Tue

Explore the week

Week's highest reading: 197IPD Serian, Sarawak15:00 MYT, 25 Oct 2026
Cleanest average: 32.8Langkawi, KedahGood weekly average
Good to Moderate air: 81%of all hourly readings11,424 readings in total
Stations reporting: 68of 68 DOE stations16 states and territories

Seven days of national air quality

Pergerakan purata harian dan julat bacaan sepanjang minggu

Archived API · Malaysia TimePoint, tap or use ← → to inspect

National averageStation peakMin–max rangeAPI bands7 of 7 points · 0–250 API

The average follows all available readings each day. The range spans the lowest and highest station readings; a national average can hide local peaks.

View chart data as a table

Archived national API, daily
Date / time	Average	Minimum	Peak
Wed, 21 Oct	92.5	27	174
Thu, 22 Oct	87.3	35	169
Fri, 23 Oct	88.8	31	162
Sat, 24 Oct	97	25	179
Sun, 25 Oct	82.3	13	197
Mon, 26 Oct	59.7	12	184
Tue, 27 Oct	56.6	13	152

Where the haze sat

Taburan kualiti udara mengikut negeri dan stesen

Peak: IPD Serian · 197

Compare weekly station averages across Peninsular Malaysia, Sabah and Sarawak. Each dot represents a monitoring station. Use the state rankings below to compare regional averages with the highest reading in each state.

Peninsular Malaysia · Semenanjung Malaysia

Sabah, Sarawak & Labuan · Borneo Malaysia

0255075100125State average APIOne DOE station, sized and shaded by its weekly average

The week, hour by hour

Purata kebangsaan bagi setiap jam sepanjang tujuh hari

Read each row from midnight to 11pm, in Malaysia Time. The hourly national average helps identify when readings rose or fell during the week. Empty cells mean no hourly figure is available.

0255075100125APIBrighter cells ran hazier than the rest of this week (54.8 – 99 API)

Haziest hour of the week: Sat at 16:00 MYT, averaging API 99 nationwide.

View the hourly figures as a table

National average API by hour, Malaysia Time
Day	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Wed	97.3	96.8	96.2	95.6	94.9	94.4	94	93.8	93.7	93.6	93.3	93	92.8	92	91	90.4	90	89.5	89.7	89.6	89.6	89.6	89.3	89.2
Thu	89	89	88.9	88.7	88.7	88.7	88.4	87.9	87.6	87.3	87.4	87.3	87	87.2	87	86.8	86.3	86.6	86.4	85.8	85.4	85.3	85.6	85.8
Fri	86.4	87	87.6	88.2	88.6	88.7	88.7	88.6	88.4	88.2	88.2	88	88.3	88.5	88.7	88.5	88.8	88.7	89.4	89.9	90.3	90.5	90.9	91.3
Sat	91.9	92.6	93.2	93.9	94.2	95.1	96.2	97.4	97.5	97.5	97.6	97.9	98.2	98.3	98.6	98.5	99	98.7	98.6	98.7	98.7	98.7	98.3	97.9
Sun	97	95.8	94.6	93.6	92.3	90.3	88.1	86.3	85.3	84.2	83.2	82.2	81.1	79.7	78.5	77.7	76.8	75.7	74.9	74.4	73.1	71.6	70.1	68.4
Mon	66.8	65.6	65	64.2	63.6	63	62.4	62	61.6	61.1	60.4	59.7	59.5	59	58.4	57.4	56.5	55.8	55.5	55.2	55.1	55	54.9	54.8
Tue	55	55.3	55.5	55.8	56.2	56.4	56.7	56.8	56.9	57.1	57.6	57.6	57.5	57.4	57.1	56.9	56.8	56.8	56.9	56.8	56.6	56.4	55.9	55.7

How the readings split

Pecahan bacaan mengikut kategori IPU

GoodBaik17%1,890
ModerateSederhana64%7,297
UnhealthyTidak Sihat20%2,237
Very UnhealthySangat Tidak Sihat0%0
HazardousBerbahaya0%0

Based on 11,424 hourly station readings.

What it meant for your week

Panduan kesihatan mengikut kategori kualiti udara

Air quality is acceptable. People with asthma, heart or lung conditions should reduce prolonged or heavy outdoor exertion.

Kualiti udara sederhana. Pesakit asma, jantung atau paru-paru dinasihatkan mengurangkan aktiviti berat di luar bangunan.

Malaysia API scale · Skala IPU Malaysia
API	Category	Kategori
0–50	Good	Baik
51–100	Moderate	Sederhana
101–200	Unhealthy	Tidak Sihat
201–300	Very Unhealthy	Sangat Tidak Sihat
301+	Hazardous	Berbahaya

States ranked by weekly average

Kedudukan negeri mengikut purata IPU mingguan

Marker shows each state's peak

Negeri Sembilan118.3Unhealthy · 3 stations
Kuala Lumpur114.8Unhealthy · 2 stations
Melaka108.9Unhealthy · 3 stations
Putrajaya106.8Unhealthy · 1 station
Johor106.1Unhealthy · 8 stations
Selangor98.9Moderate · 6 stations
Sarawak86Moderate · 13 stations
Pahang70.6Moderate · 5 stations
Perak65.8Moderate · 5 stations
Terengganu65.6Moderate · 4 stations
Labuan64.2Moderate · 1 station
Sabah60.3Moderate · 6 stations
Kelantan53.6Moderate · 2 stations
Penang52.9Moderate · 4 stations
Kedah42.5Good · 4 stations
Perlis42.4Good · 1 station

Cleanest air of the week

Lima stesen dengan purata IPU terendah

Scale 0 – 200

Langkawi32.8avg
Kedah
13Good58
Alor Setar41.4avg
Kedah
17Good64
Balik Pulau42.1avg
Pulau Pinang
12Good67
Kangar42.4avg
Perlis
20Good68
Kulim Hi-Tech46.1avg
Kedah
16Good71

Highest readings of the week

Lima stesen dengan bacaan IPU tertinggi

Scale 0 – 200

IPD Serian197peak
Sarawak
57Unhealthy197
Kuching188peak
Sarawak
60Unhealthy188
Samarahan183peak
Sarawak
66Unhealthy183
Bukit Rambai174peak
Melaka
35Unhealthy174
Seremban172peak
Negeri Sembilan
57Unhealthy172

Major cities

Purata dan puncak mingguan bagi bandar utama Malaysia

Johor BahruJohor109.3Unhealthy · Tidak SihatPeak 170Larkin
Kuala LumpurKuala Lumpur102Unhealthy · Tidak SihatPeak 164Cheras
KuchingSarawak104.3Unhealthy · Tidak SihatPeak 188Kuching
Alor SetarKedah41.4Good · BaikPeak 64Alor Setar
Kota BharuKelantan52.9Moderate · SederhanaPeak 75Kota Bharu
MelakaMelaka107.2Unhealthy · Tidak SihatPeak 165Bandaraya Melaka
SerembanNegeri Sembilan127.1Unhealthy · Tidak SihatPeak 172Seremban
KuantanPahang65.5Moderate · SederhanaPeak 88Indera Mahkota Kuantan
George TownPulau Pinang49.2Good · BaikPeak 69Minden
IpohPerak73.1Moderate · SederhanaPeak 95Tasek Ipoh
KangarPerlis42.4Good · BaikPeak 68Kangar
Kota KinabaluSabah54.6Moderate · SederhanaPeak 82Kota Kinabalu
Shah AlamSelangor102.1Unhealthy · Tidak SihatPeak 164Shah Alam
Kuala TerengganuTerengganu57Moderate · SederhanaPeak 76Kuala Terengganu

Reading the report

What a week of
air quality tells us.

A closer look at Malaysia's Air Pollutant Index, known locally as Indeks Pencemaran Udara or IPU.

Malaysia's weekly API in context

This report covers 21 – 27 Oct 2026, the latest Wednesday-to-Tuesday reporting week in Malaysia Time. The national weekly average of 80.6 API falls in the Moderate category. On Tuesday, the final day's data is partial until all hourly readings arrive. It summarises the period across reporting stations; it does not describe every place at every hour.

Why averages and peaks tell different stories

A weekly average shows the level across the available readings. A peak is the highest single reading during that period, so a short rise at one station can stand out even when the weekly average is lower. For this report, the highest value is 197 API at IPD Serian in Sarawak. Compare the solid average line with the station peak and min–max range to see that difference.

Comparing states, stations and cities

State averages combine station averages in proportion to their reading counts. Stations with more observations contribute more to the result. City summaries use a representative monitoring station, named below each city. That station describes its monitoring location; readings can differ elsewhere in the city.

Where these numbers come from

This report uses 11,424 stored hourly readings from 68 reporting stations. The archive collects the Department of Environment Malaysia's APIMS feed. Coverage depends on the readings received during the reporting window. Missing observations can affect comparisons between places and periods.

Looking for today's haze conditions?

This is a historical weekly summary. For current conditions, open the live Malaysia air quality report or find a nearby station on the air quality map. The about page explains the source and how Haze Monitor presents the data.

Questions readers ask

Soalan lazim berkenaan jerebu dan kualiti udara Malaysia

What was Malaysia's average air quality during the latest reporting week?

Across 21 – 27 Oct 2026, Malaysia averaged an Air Pollutant Index of 80.6, which sits in the Moderate band (Sederhana). 81% of all hourly readings stayed within Good or Moderate.

Where was the cleanest air recorded?

Langkawi in Kedah held the lowest weekly average at API 32.8 (Good).

Which area had the worst haze?

The single highest reading of the week was API 197 (Unhealthy) at IPD Serian, Sarawak, recorded at 15:00 MYT, 25 Oct 2026.

How is this report put together?

Hourly readings are collected from the Department of Environment's APIMS feed for all 68 national stations and stored as they arrive. The report advances to a new Wednesday-to-Tuesday period each Tuesday in Malaysia Time and refreshes hourly. On Tuesday, readings for the final day accumulate as they arrive. State figures weight each station by how many hours it actually reported.