30 Sep – 6 Oct 2026 · Malaysia

Klang weekly air quality

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

116Weekly mean AQI · Unhealthy for Sensitive Groups

Official DOE API mean: 100.9. 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

154 eligible observations · 0 excluded.

+28.3 AQI compared with the previous week’s eligible mean of 87.7.

Peak AQI: 173 at Klang · 30 Sept 2026, 00:00 (UTC+8).

Daily US AQI (PM2.5)

Low 77High 173AQI

30 Sept6 Oct

6 OctDaily mean · Peak 10599Avg AQI

Based on 10 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	164Unhealthy	173	24 / 0
2026-10-01	148.8Unhealthy for Sensitive Groups	154	24 / 0
2026-10-02	105.1Unhealthy for Sensitive Groups	141	24 / 0
2026-10-03	82.8Moderate	90	24 / 0
2026-10-04	100.9Unhealthy for Sensitive Groups	109	24 / 0
2026-10-05	101.4Unhealthy for Sensitive Groups	109	24 / 0
2026-10-06	99Moderate	105	10 / 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	173	171	171	171	170	169	167	167	167	167	167	166	165	163	162	160	160	160	159	158	158	156	155	155
2026-10-01	154	154	154	154	154	154	154	152	152	151	151	152	151	152	151	151	148	147	143	140	138	136	139	139
2026-10-02	141	138	132	130	126	126	122	118	117	113	109	105	99	96	91	87	87	84	84	86	84	84	83	81
2026-10-03	78	78	78	80	77	77	77	78	80	81	83	83	83	86	86	86	84	86	87	87	87	87	88	90
2026-10-04	91	93	94	96	97	99	99	99	99	97	99	97	97	99	101	103	105	107	107	107	109	109	109	109
2026-10-05	109	109	109	107	107	105	105	105	105	107	105	107	105	103	101	99	97	96	94	93	91	91	91	93
2026-10-06	91	91	94	96	99	101	103	105	105	105	—	—	—	—	—	—	—	—	—	—	—	—	—	—

Observation categories

Good: 0

Moderate: 64

Unhealthy for Sensitive Groups: 50

Unhealthy: 40

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

Klang air quality.
Weekly station review.

30 Sep – 6 Oct 20267 days · Selangor

Laporan mingguan Indeks Pencemaran Udara (IPU) bagi stesen Klang, Selangor

During the week of 30 Sep – 6 Oct 2026, air quality at Klang averaged an Air Pollutant Index (API) of 100.9 (Unhealthy). Readings peaked at 167.

Station weekly average

100.9API

Unhealthy · Tidak Sihat

Daily averages69 – 160.7 APIWed → Tue

Explore the week

Week's peak reading: 167UnhealthyPeak during 7-day window
Rank in Selangor: #4of 6 stationsState avg: 98.5 API
Good to Moderate air: 69%of hourly readings154 readings recorded
National standing: #56of 68 stationsNational avg: 82 API

Seven days of station 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 · 0–200 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	160.7	154	167
Thu, 1 Oct	139.8	99	153
Fri, 2 Oct	82.7	68	113
Sat, 3 Oct	69	65	74
Sun, 4 Oct	80.8	75	85
Mon, 5 Oct	81	75	85
Tue, 6 Oct	79.7	75	83

The week, hour by hour

Bacaan setiap jam dari tengah malam hingga 11 malam

Read each row from midnight to 11pm, in Malaysia Time. Hourly air quality at Klang shows local patterns like traffic peaks and afternoon haze accumulation.

050100150200APIBrighter cells ran hazier than the rest of this week (65 – 167 API)

Haziest hour of the week: Wed at 00:00 MYT, averaging API 167 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	167	166	166	166	165	164	163	163	163	163	163	162	161	160	159	158	158	158	157	156	156	155	154	154
Thu	153	153	153	153	153	153	153	152	152	151	151	152	151	152	151	151	143	139	123	108	100	99	104	104
Fri	113	100	97	96	94	94	92	90	89	87	85	83	80	78	75	72	72	70	70	71	70	70	69	68
Sat	66	66	66	67	65	65	65	66	67	68	69	69	69	71	71	71	70	71	72	72	72	72	73	74
Sun	75	76	77	78	79	80	80	80	80	79	80	79	79	80	81	82	83	84	84	84	85	85	85	85
Mon	85	85	85	84	84	83	83	83	83	84	83	84	83	82	81	80	79	78	77	76	75	75	75	76
Tue	75	75	77	78	80	81	82	83	83	83	—	—	—	—	—	—	—	—	—	—	—	—	—	—

How the readings split

Pecahan bacaan mengikut kategori IPU

GoodBaik0%0
ModerateSederhana69%107
UnhealthyTidak Sihat31%47
Very UnhealthySangat Tidak Sihat0%0
HazardousBerbahaya0%0

Based on 154 hourly station readings.

What it meant for this area

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

Nearby monitoring stations around Klang

Perbandingan purata mingguan dengan stesen berhampiran

Johan Setia118.4 API
Unhealthy9.4 away
Shah Alam106.9 API
Unhealthy19 away
Petaling Jaya95.5 API
Moderate25 away
Banting91.9 API
Moderate32 away

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	167	166	166	166	165	164	163	163	163	163	163	162	161	160	159	158	158	158	157	156	156	155	154	154
Thu	153	153	153	153	153	153	153	152	152	151	151	152	151	152	151	151	143	139	123	108	100	99	104	104
Fri	113	100	97	96	94	94	92	90	89	87	85	83	80	78	75	72	72	70	70	71	70	70	69	68
Sat	66	66	66	67	65	65	65	66	67	68	69	69	69	71	71	71	70	71	72	72	72	72	73	74
Sun	75	76	77	78	79	80	80	80	80	79	80	79	79	80	81	82	83	84	84	84	85	85	85	85
Mon	85	85	85	84	84	83	83	83	83	84	83	84	83	82	81	80	79	78	77	76	75	75	75	76
Tue	75	75	77	78	80	81	82	83	83	83	—	—	—	—	—	—	—	—	—	—	—	—	—	—

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	167	166	166	166	165	164	163	163	163	163	163	162	161	160	159	158	158	158	157	156	156	155	154	154
Thu	153	153	153	153	153	153	153	152	152	151	151	152	151	152	151	151	143	139	123	108	100	99	104	104
Fri	113	100	97	96	94	94	92	90	89	87	85	83	80	78	75	72	72	70	70	71	70	70	69	68
Sat	66	66	66	67	65	65	65	66	67	68	69	69	69	71	71	71	70	71	72	72	72	72	73	74
Sun	75	76	77	78	79	80	80	80	80	79	80	79	79	80	81	82	83	84	84	84	85	85	85	85
Mon	85	85	85	84	84	83	83	83	83	84	83	84	83	82	81	80	79	78	77	76	75	75	75	76
Tue	75	75	77	78	80	81	82	83	83	83	—	—	—	—	—	—	—	—	—	—	—	—	—	—