30 Sep – 6 Oct 2026 · Malaysia

Kuala Lumpur weekly air quality

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

138.5Weekly mean AQI · Unhealthy for Sensitive Groups

Official DOE API mean: 121.4. 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

155 eligible observations · 0 excluded.

+33.4 AQI compared with the previous week’s eligible mean of 105.1.

Peak AQI: 181 at Cheras · 30 Sept 2026, 00:00 (UTC+8).

Daily US AQI (PM2.5)

Low 101High 181AQI

30 Sept6 Oct

6 OctDaily mean · Peak 152148.5Avg AQI

Based on 11 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
2026-09-30	172.1Unhealthy	181	24 / 0
2026-10-01	140.8Unhealthy for Sensitive Groups	156	24 / 0
2026-10-02	125.3Unhealthy for Sensitive Groups	130	24 / 0
2026-10-03	110.8Unhealthy for Sensitive Groups	124	24 / 0
2026-10-04	124.2Unhealthy for Sensitive Groups	147	24 / 0
2026-10-05	153Unhealthy	156	24 / 0
2026-10-06	148.5Unhealthy for Sensitive Groups	152	11 / 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
2026-09-30	181	181	181	181	181	181	181	181	181	179	179	177	173	170	167	165	166	166	163	162	160	159	158	158
2026-10-01	156	156	155	155	154	154	152	151	150	148	143	145	143	141	143	142	134	130	128	124	122	118	117	118
2026-10-02	118	118	120	120	122	122	122	122	124	124	126	126	128	128	126	130	130	130	130	130	130	128	128	126
2026-10-03	124	122	120	118	117	115	115	113	111	111	113	111	111	109	107	101	101	101	105	105	107	107	107	107
2026-10-04	107	109	111	111	113	113	115	115	117	117	117	117	118	120	126	132	136	136	138	138	139	143	145	147
2026-10-05	148	148	151	152	152	152	152	152	152	152	152	154	154	154	154	155	155	155	156	156	155	154	154	152
2026-10-06	152	152	149	147	146	146	146	147	148	149	152	—	—	—	—	—	—	—	—	—	—	—	—	—

Observation categories

Good: 0

Moderate: 0

Unhealthy for Sensitive Groups: 98

Unhealthy: 57

Very Unhealthy: 0

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

Kuala Lumpur air quality.
Weekly city review.

30 Sep – 6 Oct 20267 days · Kuala Lumpur

Laporan mingguan Indeks Pencemaran Udara (IPU) bagi bandar Kuala Lumpur, Kuala Lumpur

Kuala Lumpur air quality averaged an Air Pollutant Index (API) of 121.4 (Unhealthy) during the week of 30 Sep – 6 Oct 2026, monitored via the Cheras station.

City weekly average

121.4API

Unhealthy · Tidak Sihat

Daily averages86 – 166.5 APIWed → Tue

Explore the week

Week's highest reading: 173UnhealthyPeak reading during period
Monitoring station: CherasKuala LumpurRepresentative station
Good to Moderate air: 49%of hourly readings155 readings recorded
State & National context: 121.4 APIKuala Lumpur avgNational avg: 82.1 API

Seven days of air quality in Kuala Lumpur

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 · 0–200 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, 30 Sep	166.5	156	173
Thu, 1 Oct	124.3	89	155
Fri, 2 Oct	93.7	90	96
Sat, 3 Oct	86	81	93
Sun, 4 Oct	96.2	84	136
Mon, 5 Oct	151.9	140	155
Tue, 6 Oct	142.3	132	152

The week, hour by hour

Purata setiap jam sepanjang tujuh hari di stesen berkaitan

Hourly readings at Cheras indicate typical diurnal trends such as morning traffic and afternoon dispersion in Kuala Lumpur.

050100150200APIBrighter cells ran hazier than the rest of this week (81 – 173 API)

Haziest hour of the week: Wed at 00:00 MYT, averaging API 173 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	173	173	173	173	173	173	173	173	173	172	172	170	167	165	163	161	162	162	160	159	158	157	156	156
Thu	155	155	154	154	153	153	152	151	149	141	122	128	120	114	123	116	98	96	95	93	92	90	89	90
Fri	90	90	91	91	92	92	92	92	93	93	94	94	95	95	94	96	96	96	96	96	96	95	95	94
Sat	93	92	91	90	89	88	88	87	86	86	87	86	86	85	84	81	81	81	83	83	84	84	84	84
Sun	84	85	86	86	87	87	88	88	89	89	89	89	90	91	94	97	99	99	100	100	104	121	130	136
Mon	140	143	151	152	152	152	152	152	152	152	152	153	153	153	153	154	154	154	155	155	154	153	153	152
Tue	152	152	147	138	135	133	132	137	140	147	152	—	—	—	—	—	—	—	—	—	—	—	—	—

How readings split

Pecahan bacaan mengikut kategori IPU

GoodBaik0%0
ModerateSederhana49%76
UnhealthyTidak Sihat51%79
Very UnhealthySangat Tidak Sihat0%0
HazardousBerbahaya0%0

Based on 155 hourly station readings.

Health advisory

Panduan kesihatan mengikut kategori kualiti udara

Limit prolonged outdoor activity. Children, older adults, pregnant women and people with respiratory or heart conditions should stay indoors where possible. A well-fitted N95 mask helps outdoors.

Hadkan aktiviti luar yang berpanjangan. Kanak-kanak, warga emas, ibu mengandung dan pesakit pernafasan atau jantung dinasihatkan berada di dalam bangunan. Pelitup muka N95 membantu di luar.

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

Comparison with nearby cities

Perbandingan purata kualiti udara mingguan dengan bandar berdekatan

Johor Bahru126.3 API
UnhealthyLive status →
Kuching80.8 API
ModerateLive status →
Alor Setar61.9 API
ModerateLive status →

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	173	173	173	173	173	173	173	173	173	172	172	170	167	165	163	161	162	162	160	159	158	157	156	156
Thu	155	155	154	154	153	153	152	151	149	141	122	128	120	114	123	116	98	96	95	93	92	90	89	90
Fri	90	90	91	91	92	92	92	92	93	93	94	94	95	95	94	96	96	96	96	96	96	95	95	94
Sat	93	92	91	90	89	88	88	87	86	86	87	86	86	85	84	81	81	81	83	83	84	84	84	84
Sun	84	85	86	86	87	87	88	88	89	89	89	89	90	91	94	97	99	99	100	100	104	121	130	136
Mon	140	143	151	152	152	152	152	152	152	152	152	153	153	153	153	154	154	154	155	155	154	153	153	152
Tue	152	152	147	138	135	133	132	137	140	147	152	—	—	—	—	—	—	—	—	—	—	—	—	—

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	173	173	173	173	173	173	173	173	173	172	172	170	167	165	163	161	162	162	160	159	158	157	156	156
Thu	155	155	154	154	153	153	152	151	149	141	122	128	120	114	123	116	98	96	95	93	92	90	89	90
Fri	90	90	91	91	92	92	92	92	93	93	94	94	95	95	94	96	96	96	96	96	96	95	95	94
Sat	93	92	91	90	89	88	88	87	86	86	87	86	86	85	84	81	81	81	83	83	84	84	84	84
Sun	84	85	86	86	87	87	88	88	89	89	89	89	90	91	94	97	99	99	100	100	104	121	130	136
Mon	140	143	151	152	152	152	152	152	152	152	152	153	153	153	153	154	154	154	155	155	154	153	153	152
Tue	152	152	147	138	135	133	132	137	140	147	152	—	—	—	—	—	—	—	—	—	—	—	—	—