23 – 29 Sep 2026 · Malaysia

Malaysia weekly air quality

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

90.1Weekly mean AQI · Moderate

Official DOE API mean: 77.5. 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

11420 eligible observations · 4 excluded.

-21.2 AQI compared with the previous week’s eligible mean of 111.3.

Peak AQI: 250 at IPD Serian · 24 Sept 2026, 03:00 (UTC+8).

Daily US AQI (PM2.5)

Low 27High 250AQI

23 Sept29 Sept

29 SeptDaily mean · Peak 189117.9Avg AQI

Based on 1632 hourly readings.

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
2026-09-23	91.9Moderate	244	1632 / 0
2026-09-24	94.2Moderate	250	1632 / 0
2026-09-25	87.2Moderate	196	1632 / 0
2026-09-26	84.1Moderate	166	1632 / 0
2026-09-27	78.8Moderate	170	1631 / 1
2026-09-28	76.3Moderate	170	1629 / 3
2026-09-29	117.9Unhealthy for Sensitive Groups	189	1632 / 0

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
2026-09-23	91.7	91.2	90.9	90.3	89.9	89.8	89.8	89.6	89.7	89.9	90.1	90.7	91	91.3	91.8	92.6	92.8	93.2	93.9	94.4	94.9	95.1	95.8	96.1
2026-09-24	96.5	96.9	97.4	97.8	97.9	97.8	97.5	97.1	96.6	96.3	95.6	95.3	94.8	94.4	93.7	92.8	92.7	92	91.2	90.5	89.9	89.4	89	88.8
2026-09-25	88.5	88.2	87.9	87.6	87.4	87.4	87.5	87.5	87.7	87.5	87.7	87.8	88	87.7	87.5	87.1	86.9	86.8	86.5	86.3	86.3	86	86.1	85.5
2026-09-26	85.2	84.8	84.5	84.3	84.2	83.9	83.5	83.2	83	82.7	82.6	82.3	82.6	83.3	83.6	84.1	84.4	84.6	85	85.2	85	85.4	85.6	85.4
2026-09-27	85.2	84.9	84.6	84.3	83.9	83.4	83.1	82.9	82.4	81.6	80.9	80.2	79.2	78	76.9	75.7	74.7	74.4	73.9	73.7	72.6	72.1	71.6	71.1
2026-09-28	70.5	70.1	69.9	69.9	70	70	70	70	70.3	71	71.5	71.9	72.6	73.6	74.8	76.1	77.9	79.8	81.7	84.6	87.4	89.9	92.4	94.9
2026-09-29	96.9	99.5	101.8	104	106	108	109.9	111.5	113.3	115	116.8	118.7	120.7	122.6	124.5	127	128.3	129.1	129.6	129.3	129.3	129.5	128.9	128.7

Observation categories

Good: 488

Moderate: 8085

Unhealthy for Sensitive Groups: 1526

Unhealthy: 1263

Very Unhealthy: 58

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
IPD Serian	178.3Unhealthy	250	167	168 / 0
Kuching	157.4Unhealthy	216	138.8	168 / 0
Samarahan	146.5Unhealthy for Sensitive Groups	204	132.9	168 / 0
Sri Aman	145.2Unhealthy for Sensitive Groups	193	126.6	168 / 0
Pasir Gudang	125Unhealthy for Sensitive Groups	181	108.9	168 / 0
Larkin	118.8Unhealthy for Sensitive Groups	179	103.5	168 / 0
Bintulu	118.7Unhealthy for Sensitive Groups	182	104.3	168 / 0
Sarikei	110.9Unhealthy for Sensitive Groups	175	99.1	168 / 0
Nilai	110.8Unhealthy for Sensitive Groups	184	92.9	168 / 0
Kota Tinggi	110.8Unhealthy for Sensitive Groups	170	98.5	168 / 0
Pengerang	110.1Unhealthy for Sensitive Groups	167	97.8	168 / 0
Bukit Rambai	109.6Unhealthy for Sensitive Groups	178	92.6	168 / 0
Batu Pahat	107.8Unhealthy for Sensitive Groups	173	91.1	168 / 0
Sibu	106.8Unhealthy for Sensitive Groups	185	96	168 / 0
Samalaju	106.6Unhealthy for Sensitive Groups	169	94.6	168 / 0
Cheras	105.1Unhealthy for Sensitive Groups	181	89.1	168 / 0
JOHAN SETIA	102.7Unhealthy for Sensitive Groups	189	87.2	168 / 0
Mukah	102.4Unhealthy for Sensitive Groups	173	90.1	168 / 0
Shah Alam	102.3Unhealthy for Sensitive Groups	182	86.6	168 / 0
Kapit	97.5Moderate	149	81	168 / 0
Bandaraya Melaka	96.1Moderate	184	83.2	168 / 0
Rompin	94.3Moderate	162	80.2	168 / 0
Tawau	93.7Moderate	101	76.6	168 / 0
Tangkak	93.5Moderate	170	80.9	168 / 0
Politeknik Kota Kinabalu	92.6Moderate	138	74.8	168 / 0
Seremban	92.3Moderate	171	79	168 / 0
Kluang	91.9Moderate	158	78.9	168 / 0
Petaling Jaya	91.7Moderate	166	78.1	168 / 0
Alor Gajah	91.1Moderate	166	78.5	168 / 0
Batu Muda	90.6Moderate	166	77.1	168 / 0
Segamat	90.2Moderate	163	78.1	168 / 0
Port Dickson	89.6Moderate	174	77.6	168 / 0
Putrajaya	88.8Moderate	171	77.1	168 / 0
Miri	88.3Moderate	165	78.2	168 / 0
Klang	87.7Moderate	173	76.2	168 / 0
Balok Baru Kuantan	86.1Moderate	167	74	168 / 0
Kuala Selangor	85.2Moderate	165	73.6	168 / 0
Banting	84.9Moderate	169	74	168 / 0
Labuan	84.4Moderate	136	68.9	168 / 0
ILP Miri	84.2Moderate	160	73.6	168 / 0
Seri Manjung	81.3Moderate	166	70.8	168 / 0
Limbang	81.2Moderate	155	70.6	168 / 0
Indera Mahkota Kuantan	79.9Moderate	165	69.1	168 / 0
Seberang Jaya	79.8Moderate	139	66.8	168 / 0
Kemaman	79.5Moderate	158	68.4	168 / 0
Sandakan	78.3Moderate	94	66	168 / 0
Sungai Petani	78.1Moderate	144	65.5	168 / 0
Seberang Perai	76.1Moderate	128	64.3	168 / 0
Paka	75.8Moderate	143	63.9	168 / 0
Minden	74.4Moderate	155	63.9	168 / 0
Kuala Terengganu	73.5Moderate	155	63.7	168 / 0
Kota Kinabalu	73Moderate	109	60.7	168 / 0
Tanjung Malim	72.2Moderate	138	61.4	168 / 0
Taiping	72.1Moderate	115	61.6	168 / 0
Pegoh Ipoh	71.6Moderate	105	61.3	168 / 0
Jerantut	71Moderate	156	61	168 / 0
Kulim Hi-Tech	69.3Moderate	120	59.3	168 / 0
Tasek Ipoh	68.5Moderate	88	59.3	168 / 0
Alor Setar	67.8Moderate	107	56.4	168 / 0
Balik Pulau	67.5Moderate	154	58.1	168 / 0
Kimanis	67.5Moderate	88	58.2	168 / 0
Kota Bharu	66.5Moderate	109	56.4	168 / 0
Keningau	66.3Moderate	101	56.6	168 / 0
Temerloh	61.5Moderate	130	50.2	168 / 0
Kangar	53.9Moderate	80	44.9	168 / 0
Besut	51.2Moderate	113	40.5	168 / 0
Tanah Merah	49.9Good	78	40.8	168 / 0
Langkawi	45.4Good	105	35.9	164 / 4

States by US AQI

State	Mean AQI	Official API mean	Eligible / excluded
Sarawak	117.2	104.1	2184 / 0
Johor	106	92.2	1344 / 0
Melaka	99	84.8	504 / 0
Kuala Lumpur	97.9	83.1	336 / 0
Negeri Sembilan	97.6	83.2	504 / 0
Selangor	92.4	79.3	1008 / 0
Putrajaya	88.8	77.1	168 / 0
Labuan	84.4	68.9	168 / 0
Sabah	78.6	65.5	1008 / 0
Pahang	78.5	66.9	840 / 0
Penang	74.5	63.3	672 / 0
Perak	73.1	62.9	840 / 0
Terengganu	70	59.1	672 / 0
Kedah	65.3	54.3	668 / 4
Kelantan	58.2	48.6	336 / 0
Perlis	53.9	44.9	168 / 0

Malaysia air quality.
The week in review.

23 – 29 Sep 20267 days · Malaysia Time

Laporan mingguan Indeks Pencemaran Udara (IPU) dan jerebu Malaysia

During the week of 23 – 29 Sep 2026, Malaysia recorded an overall average Air Pollutant Index (API) of 77.5 (Moderate).

National weekly average

77.5API

Moderate · Sederhana

24.5 API cleaner than the week before, which averaged 102

Daily averages64.4 – 106.1 APIWed → Tue

Explore the week

Week's highest reading: 225IPD Serian, Sarawak04:00 MYT, 24 Sept 2026
Cleanest average: 35.9Langkawi, KedahGood weekly average
Good to Moderate air: 86%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, 23 Sep	80.7	24	219
Thu, 24 Sep	80.6	21	225
Fri, 25 Sep	73.7	24	184
Sat, 26 Sep	69.9	33	162
Sun, 27 Sep	67.4	20	165
Mon, 28 Sep	64.4	24	165
Tue, 29 Sep	106.1	24	179

Where the haze sat

Taburan kualiti udara mengikut negeri dan stesen

Peak: IPD Serian · 225

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.

050100150APIBrighter cells ran hazier than the rest of this week (59.1 – 118.8 API)

Haziest hour of the week: Tue at 21:00 MYT, averaging API 118.8 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	80.3	80.2	80	79.7	79.5	79.3	79.4	79.3	79.4	79.6	79.8	80.1	80.3	80.4	80.5	81.2	81.2	81.4	81.8	82.3	82.6	82.9	83.3	83.5
Thu	83.7	83.7	83.8	84	83.7	83.5	83.2	82.6	82	82	81.2	81.1	80.9	80.7	79.6	79	79.1	78.7	78.3	77.8	77.3	76.7	76.2	76.2
Fri	76	75.8	75.4	74.7	74	73.8	73.7	73.7	73.8	73.8	73.9	74	74.1	73.9	73.9	73.6	73.5	73	72.7	72.6	72.6	72.3	72.1	71.3
Sat	70.9	70.4	70.2	70	70	69.8	69.5	69.3	69.2	69.1	68.9	68.6	68.8	69.1	69.1	69.3	69.6	69.5	69.6	69.9	70.7	71.8	72.2	72.2
Sun	72	71.8	71.6	71.5	71.3	71.1	71.1	70.9	70.5	70	69.4	68.9	67.9	67	66.2	65.4	64.6	64.3	63.9	62.9	62.3	62	61.2	60
Mon	59.1	59.2	59.1	59.2	59.6	59.7	59.9	60	60.4	60.8	61.3	61.5	62	62.6	63.5	64.4	65.4	66.5	67.6	70	72.2	74.6	77.1	79.3
Tue	82.3	85.5	87.5	89.9	92.1	95.3	98.1	99.9	101.7	104	106.6	108.9	110.2	111.5	112.9	115	116.6	117.6	118.3	118.5	118.7	118.8	118	117.3

How the readings split

Pecahan bacaan mengikut kategori IPU

GoodBaik10%1,144
ModerateSederhana76%8,687
UnhealthyTidak Sihat14%1,571
Very UnhealthySangat Tidak Sihat0%22
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

Sarawak104.1Unhealthy · 13 stations
Johor92.2Moderate · 8 stations
Melaka84.8Moderate · 3 stations
Negeri Sembilan83.2Moderate · 3 stations
Kuala Lumpur83.1Moderate · 2 stations
Selangor79.3Moderate · 6 stations
Putrajaya77.1Moderate · 1 station
Labuan68.9Moderate · 1 station
Pahang66.9Moderate · 5 stations
Sabah65.5Moderate · 6 stations
Penang63.3Moderate · 4 stations
Perak62.9Moderate · 5 stations
Terengganu59.1Moderate · 4 stations
Kedah54.3Moderate · 4 stations
Kelantan48.6Good · 2 stations
Perlis44.9Good · 1 station

Cleanest air of the week

Lima stesen dengan purata IPU terendah

Scale 0 – 250

Langkawi35.9avg
Kedah
20Good83
Besut40.5avg
Terengganu
21Good87
Tanah Merah40.8avg
Kelantan
23Good66
Kangar44.9avg
Perlis
21Good67
Temerloh50.2avg
Pahang
30Moderate96

Highest readings of the week

Lima stesen dengan bacaan IPU tertinggi

Scale 0 – 250

IPD Serian225peak
Sarawak
111Unhealthy225
Kuching195peak
Sarawak
89Unhealthy195
Samarahan189peak
Sarawak
72Unhealthy189
Sri Aman182peak
Sarawak
69Unhealthy182
JOHAN SETIA179peak
Selangor
56Moderate179

Major cities

Purata dan puncak mingguan bagi bandar utama Malaysia

Johor BahruJohor103.5Unhealthy · Tidak SihatPeak 172Larkin
Kuala LumpurKuala Lumpur89.1Moderate · SederhanaPeak 173Cheras
KuchingSarawak138.8Unhealthy · Tidak SihatPeak 195Kuching
Alor SetarKedah56.4Moderate · SederhanaPeak 84Alor Setar
Kota BharuKelantan56.4Moderate · SederhanaPeak 85Kota Bharu
MelakaMelaka83.2Moderate · SederhanaPeak 175Bandaraya Melaka
SerembanNegeri Sembilan79Moderate · SederhanaPeak 166Seremban
KuantanPahang69.1Moderate · SederhanaPeak 161Indera Mahkota Kuantan
George TownPulau Pinang63.9Moderate · SederhanaPeak 154Minden
IpohPerak59.3Moderate · SederhanaPeak 73Tasek Ipoh
KangarPerlis44.9Good · BaikPeak 67Kangar
Kota KinabaluSabah60.7Moderate · SederhanaPeak 85Kota Kinabalu
Shah AlamSelangor86.6Moderate · SederhanaPeak 174Shah Alam
Kuala TerengganuTerengganu63.7Moderate · SederhanaPeak 154Kuala 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 23 – 29 Sep 2026, the latest Wednesday-to-Tuesday reporting week in Malaysia Time. The national weekly average of 77.5 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 225 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 23 – 29 Sep 2026, Malaysia averaged an Air Pollutant Index of 77.5, which sits in the Moderate band (Sederhana). 86% 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 35.9 (Good).

Which area had the worst haze?

The single highest reading of the week was API 225 (Very Unhealthy) at IPD Serian, Sarawak, recorded at 04:00 MYT, 24 Sept 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.