14 – 20 Oct 2026 · Malaysia

Selangor weekly air quality

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

165.8Weekly mean AQI · Unhealthy

Official DOE API mean: 157.2. 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

1008 eligible observations · 0 excluded.

+24.7 AQI compared with the previous week’s eligible mean of 141.1.

Peak AQI: 216 at Klang · 15 Oct 2026, 17:00 (UTC+8).

Daily US AQI (PM2.5)

Low 88High 216AQI

14 Oct20 Oct

20 OctDaily mean · Peak 181162.4Avg AQI

Based on 144 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
2026-10-14	163.6Unhealthy	204	144 / 0
2026-10-15	187.6Unhealthy	216	144 / 0
2026-10-16	175.1Unhealthy	200	144 / 0
2026-10-17	164.6Unhealthy	185	144 / 0
2026-10-18	152.8Unhealthy	179	144 / 0
2026-10-19	154.3Unhealthy	182	144 / 0
2026-10-20	162.4Unhealthy	181	144 / 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
2026-10-14	148.8	149.8	151.3	152.3	154.2	155.5	156.3	157.7	158.5	160	161.7	162.3	163	163.3	164.2	165.8	167	169.5	170.7	173	175.8	179.8	182.3	184.5
2026-10-15	186.8	188.7	189	188.8	188.5	188.5	188.7	188.3	187.8	187.2	187.2	187	187.7	189.2	189.2	188.7	189	189.7	189.8	189.2	187.3	184.5	181.7	179.5
2026-10-16	177.8	177	177.5	177.5	177.7	178	178.2	178.8	178.7	179.8	180	180.5	180.5	179.7	178.5	177.2	175.7	173	170	167.5	165.8	165.2	164	162.8
2026-10-17	161.3	160.7	160.2	159.8	160.5	161.3	162	162.5	163.3	163.8	164.7	164.3	164	165.5	166.3	167.3	168.3	169	169.3	169.2	167.8	167	166.3	165.7
2026-10-18	165.5	164.8	163.7	162	160.5	159	157.5	155.8	154.7	153	152	150.3	149.8	148.8	147.5	146.2	145.7	145	145.7	146.2	147	147.7	148.7	149.3
2026-10-19	150.2	151.3	152.3	154	154.5	155.5	155.7	154.7	154.5	154.7	155	154.8	155	154.7	155.2	154.7	154.3	155	154.5	154.5	154.2	154.5	154.2	154.5
2026-10-20	155	155.8	155.8	156.7	157.5	159	160.7	162.7	163.8	165.8	166.8	166.5	166	166.2	166	165.7	165.5	164.5	164.2	163.5	163.2	162.8	162.3	161.2

Observation categories

Good: 0

Moderate: 13

Unhealthy for Sensitive Groups: 120

Unhealthy: 828

Very Unhealthy: 47

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
JOHAN SETIA	183.6Unhealthy	210	174.7	168 / 0
Klang	177.8Unhealthy	216	170.4	168 / 0
Shah Alam	170.8Unhealthy	194	165.6	168 / 0
Petaling Jaya	168Unhealthy	182	162.8	168 / 0
Banting	163.6Unhealthy	182	160.2	168 / 0
Kuala Selangor	130.8Unhealthy for Sensitive Groups	165	109.3	168 / 0

Selangor air quality.
Weekly state review.

14 – 20 Oct 20267 days · 6 monitoring stations

Laporan mingguan Indeks Pencemaran Udara (IPU) bagi negeri Selangor

Across Selangor, air quality for the week of 14 – 20 Oct 2026 averaged an Air Pollutant Index (API) of 157.2 (Unhealthy).

State weekly average

157.2API

Unhealthy · Tidak Sihat

Daily averages146.5 – 177.2 APIWed → Tue

Explore the week

State's peak reading: 195KlangPeak reading across state
Cleanest area in state: 109.3Kuala SelangorLowest weekly average
Good to Moderate air: 11%of all readings1,008 readings
National standing: #11of 16 states/territoriesNational avg: 108.7 API

Seven days of air quality in Selangor

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, 14 Oct	154.1	84	189
Thu, 15 Oct	177.2	156	195
Fri, 16 Oct	167.3	90	187
Sat, 17 Oct	154.6	86	176
Sun, 18 Oct	146.5	73	172
Mon, 19 Oct	147.4	80	174
Tue, 20 Oct	153	92	173

Monitoring stations in Selangor

Kedudukan stesen pemantauan di seluruh negeri mengikut purata mingguan

Scale 0 – 200

Kuala Selangor109.3avg
Selangor
73Unhealthy161
Petaling Jaya162.8avg
Selangor
99Unhealthy174
Shah Alam165.6avg
Selangor
152Unhealthy183
Klang170.4avg
Selangor
152Unhealthy195
Banting160.2avg
Selangor
138Unhealthy174
JOHAN SETIA174.7avg
Selangor
159Unhealthy192

The week, hour by hour

Purata negeri bagi setiap jam sepanjang tujuh hari

Read each row from midnight to 11pm, in Malaysia Time. Hourly state averages show when air quality shifted during each day of the week.

050100150200APIBrighter cells ran hazier than the rest of this week (136.7 – 178.5 API)

Haziest hour of the week: Thu at 17:00 MYT, averaging API 178.5 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	136.7	138.5	140.3	142.8	145.8	148.7	149.3	150.2	150.7	151.7	152.7	153.2	153.5	153.7	154.5	155.5	156.3	157.8	158.8	160.7	165.3	172.2	173.8	175.7
Thu	177	178.2	178.3	178.2	178	177.8	177.8	177.7	177.3	176.8	176.8	176.8	177.3	178.2	178.2	177.8	178.2	178.5	178.5	178.2	177	175.2	173.3	172.2
Fri	170.8	170.3	170.5	170.5	170.7	171	171.2	171.5	171.5	172.3	172.5	173	172.8	172.2	171.3	170.3	169.2	166	162.5	157.7	155.2	154.8	154.3	153.7
Sat	152.3	150.5	150.3	151	152.2	152.7	153	153.5	154	154.2	154.5	154.3	154.2	155	155.5	156.2	158	158.8	159	158.3	156.7	156	155.7	155.3
Sun	155.2	154.5	153.7	152.7	151.5	150.5	149.5	148.5	147.5	146.7	146	145	144.5	144	143.2	142.2	141.8	141.3	141.8	142.2	142.8	143.3	144	144.5
Mon	145	145.8	146.5	147.7	148	148.7	148.7	148	147.8	147.8	148	147.8	148	147.7	147.8	147.5	147.2	147.5	147.3	147.2	147	147.2	147	147.2
Tue	147.5	148	148	148.5	149.2	150.2	151.3	152.7	153.7	155	157.3	157.7	155.3	155.5	155.3	155.2	155.2	154.7	154.3	154	153.7	153.3	153	152.3

How readings split

Pecahan bacaan mengikut kategori IPU

GoodBaik0%0
ModerateSederhana11%114
UnhealthyTidak Sihat89%894
Very UnhealthySangat Tidak Sihat0%0
HazardousBerbahaya0%0

Based on 1,008 hourly station readings.

Health guidelines

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