30 Sep – 6 Oct 2026 · Malaysia

Shah Alam weekly air quality

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

128.8Weekly mean AQI · Unhealthy for Sensitive Groups

Official DOE API mean: 108.4. 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

162 eligible observations · 0 excluded.

+26.5 AQI compared with the previous week’s eligible mean of 102.3.

Peak AQI: 178 at Shah Alam · 30 Sept 2026, 00:00 (UTC+8).

Daily US AQI (PM2.5)

Low 87High 178AQI

30 Sept6 Oct

6 OctDaily mean · Peak 165130.8Avg AQI

Based on 18 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	170.9Unhealthy	178	24 / 0
2026-10-01	148.5Unhealthy for Sensitive Groups	162	24 / 0
2026-10-02	113.5Unhealthy for Sensitive Groups	130	24 / 0
2026-10-03	95.2Moderate	107	24 / 0
2026-10-04	119.5Unhealthy for Sensitive Groups	130	24 / 0
2026-10-05	123.5Unhealthy for Sensitive Groups	130	24 / 0
2026-10-06	130.8Unhealthy for Sensitive Groups	165	18 / 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	178	177	177	175	174	175	175	177	177	178	177	175	173	170	169	170	169	169	166	163	160	159	159	160
2026-10-01	162	162	162	162	162	160	159	158	155	154	154	152	152	152	148	145	143	134	128	130	132	132	134	132
2026-10-02	130	130	130	130	128	128	128	128	126	122	118	117	113	107	105	101	99	96	99	99	99	99	97	94
2026-10-03	93	91	91	90	88	87	87	87	87	88	90	90	91	94	96	99	101	103	105	105	105	105	105	107
2026-10-04	107	107	109	109	111	113	115	118	120	120	122	122	122	122	122	122	122	122	124	124	126	128	130	130
2026-10-05	130	130	130	130	130	130	130	128	126	126	126	126	126	126	124	122	120	118	117	117	115	113	113	111
2026-10-06	111	111	113	115	115	117	118	118	120	124	128	136	143	151	154	156	160	165	—	—	—	—	—	—

Observation categories

Good: 0

Moderate: 24

Unhealthy for Sensitive Groups: 95

Unhealthy: 43

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

Shah Alam air quality.
Weekly station review.

30 Sep – 6 Oct 20267 days · Selangor

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

During the week of 30 Sep – 6 Oct 2026, air quality at Shah Alam averaged an Air Pollutant Index (API) of 108.4 (Unhealthy). Readings peaked at 171.

Station weekly average

108.4API

Unhealthy · Tidak Sihat

Daily averages77.3 – 165.7 APIWed → Tue

Explore the week

Week's peak reading: 171UnhealthyPeak during 7-day window
Rank in Selangor: #5of 6 stationsState avg: 99.6 API
Good to Moderate air: 71%of hourly readings162 readings recorded
National standing: #60of 68 stationsNational avg: 83 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	165.7	157	171
Thu, 1 Oct	135.6	95	159
Fri, 2 Oct	87.4	77	96
Sat, 3 Oct	77.3	72	84
Sun, 4 Oct	90.6	84	96
Mon, 5 Oct	92.6	86	96
Tue, 6 Oct	110.1	86	161

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 Shah Alam shows local patterns like traffic peaks and afternoon haze accumulation.

050100150200APIBrighter cells ran hazier than the rest of this week (72 – 171 API)

Haziest hour of the week: Wed at 00:00 MYT, averaging API 171 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	171	170	170	169	168	169	169	170	170	171	170	169	167	165	164	165	164	164	162	160	158	157	157	158
Thu	159	159	159	159	159	158	157	156	154	153	153	152	152	152	142	131	122	98	95	96	97	97	98	97
Fri	96	96	96	96	95	95	95	95	94	92	90	89	87	84	83	81	80	78	80	80	80	80	79	77
Sat	76	75	75	74	73	72	72	72	72	73	74	74	75	77	78	80	81	82	83	83	83	83	83	84
Sun	84	84	85	85	86	87	88	90	91	91	92	92	92	92	92	92	92	92	93	93	94	95	96	96
Mon	96	96	96	96	96	96	96	95	94	94	94	94	94	94	93	92	91	90	89	89	88	87	87	86
Tue	86	86	87	88	88	89	90	90	91	93	95	99	121	151	153	155	158	161	—	—	—	—	—	—

How the readings split

Pecahan bacaan mengikut kategori IPU

GoodBaik0%0
ModerateSederhana71%115
UnhealthyTidak Sihat29%47
Very UnhealthySangat Tidak Sihat0%0
HazardousBerbahaya0%0

Based on 162 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 Shah Alam

Perbandingan purata mingguan dengan stesen berhampiran

Petaling Jaya97.4 API
Moderate6.5 away
Johan Setia119.9 API
Unhealthy16 away
Cheras122.9 API
Unhealthy18 away
Batu Muda107 API
Unhealthy18 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	171	170	170	169	168	169	169	170	170	171	170	169	167	165	164	165	164	164	162	160	158	157	157	158
Thu	159	159	159	159	159	158	157	156	154	153	153	152	152	152	142	131	122	98	95	96	97	97	98	97
Fri	96	96	96	96	95	95	95	95	94	92	90	89	87	84	83	81	80	78	80	80	80	80	79	77
Sat	76	75	75	74	73	72	72	72	72	73	74	74	75	77	78	80	81	82	83	83	83	83	83	84
Sun	84	84	85	85	86	87	88	90	91	91	92	92	92	92	92	92	92	92	93	93	94	95	96	96
Mon	96	96	96	96	96	96	96	95	94	94	94	94	94	94	93	92	91	90	89	89	88	87	87	86
Tue	86	86	87	88	88	89	90	90	91	93	95	99	121	151	153	155	158	161	—	—	—	—	—	—

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	171	170	170	169	168	169	169	170	170	171	170	169	167	165	164	165	164	164	162	160	158	157	157	158
Thu	159	159	159	159	159	158	157	156	154	153	153	152	152	152	142	131	122	98	95	96	97	97	98	97
Fri	96	96	96	96	95	95	95	95	94	92	90	89	87	84	83	81	80	78	80	80	80	80	79	77
Sat	76	75	75	74	73	72	72	72	72	73	74	74	75	77	78	80	81	82	83	83	83	83	83	84
Sun	84	84	85	85	86	87	88	90	91	91	92	92	92	92	92	92	92	92	93	93	94	95	96	96
Mon	96	96	96	96	96	96	96	95	94	94	94	94	94	94	93	92	91	90	89	89	88	87	87	86
Tue	86	86	87	88	88	89	90	90	91	93	95	99	121	151	153	155	158	161	—	—	—	—	—	—