21 – 27 Oct 2026 · Malaysia

Kuala Selangor weekly air quality

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

82.8Weekly mean AQI · Moderate

Official DOE API mean: 68.3. 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

150 eligible observations · 0 excluded.

-48 AQI compared with the previous week’s eligible mean of 130.8.

Peak AQI: 118 at Kuala Selangor · 21 Oct 2026, 00:00 (UTC+8).

Daily US AQI (PM2.5)

Low 49High 118AQI

21 Oct27 Oct

27 OctDaily mean · Peak 5250.5Avg AQI

Based on 6 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
2026-10-21	104.2Unhealthy for Sensitive Groups	118	24 / 0
2026-10-22	92.6Moderate	97	24 / 0
2026-10-23	93.9Moderate	101	24 / 0
2026-10-24	85.3Moderate	94	24 / 0
2026-10-25	71Moderate	78	24 / 0
2026-10-26	58Moderate	62	24 / 0
2026-10-27	50.5Moderate	52	6 / 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
2026-10-21	118	117	113	111	109	107	105	107	103	101	99	97	99	97	99	103	105	107	107	105	103	99	96	94
2026-10-22	94	94	97	97	96	96	96	94	94	94	94	94	94	94	93	90	87	86	87	88	90	90	91	93
2026-10-23	93	93	88	90	90	90	90	91	91	91	93	93	93	93	96	97	99	99	101	99	97	97	96	94
2026-10-24	94	94	94	94	94	94	93	93	93	91	90	87	84	81	78	78	77	77	75	77	78	77	77	77
2026-10-25	78	78	77	77	75	74	74	72	72	72	72	71	71	72	71	70	70	70	70	67	64	64	62	61
2026-10-26	59	61	62	62	62	62	62	61	59	59	61	61	61	59	59	58	58	56	51	52	52	52	52	52
2026-10-27	52	51	49	49	51	51	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—

Observation categories

Good: 2

Moderate: 131

Unhealthy for Sensitive Groups: 17

Unhealthy: 0

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 Selangor air quality.
Weekly station review.

21 – 27 Oct 20267 days · Selangor

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

During the week of 21 – 27 Oct 2026, air quality at Kuala Selangor averaged an Air Pollutant Index (API) of 68.3 (Moderate). Readings peaked at 90.

Station weekly average

68.3API

Moderate · Sederhana

Daily averages38.5 – 82.6 APIWed → Tue

Explore the week

Week's peak reading: 90ModeratePeak during 7-day window
Rank in Selangor: #1of 6 stationsState avg: 104.1 API
Good to Moderate air: 100%of hourly readings150 readings recorded
National standing: #27of 68 stationsNational avg: 83.4 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 · 0–100 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, 21 Oct	82.6	77	90
Thu, 22 Oct	75.9	71	79
Fri, 23 Oct	76.7	73	81
Sat, 24 Oct	70.9	64	77
Sun, 25 Oct	61	54	66
Mon, 26 Oct	50.2	39	55
Tue, 27 Oct	38.5	37	41

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 Kuala Selangor shows local patterns like traffic peaks and afternoon haze accumulation.

0255075100APIBrighter cells ran hazier than the rest of this week (37 – 90 API)

Haziest hour of the week: Wed at 00:00 MYT, averaging API 90 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	90	89	87	86	85	84	83	84	82	81	80	79	80	79	80	82	83	84	84	83	82	80	78	77
Thu	77	77	79	79	78	78	78	77	77	77	77	77	77	77	76	74	72	71	72	73	74	74	75	76
Fri	76	76	73	74	74	74	74	75	75	75	76	76	76	76	78	79	80	80	81	80	79	79	78	77
Sat	77	77	77	77	77	77	76	76	76	75	74	72	70	68	66	66	65	65	64	65	66	65	65	65
Sun	66	66	65	65	64	63	63	62	62	62	62	61	61	62	61	60	60	60	60	58	56	56	55	54
Mon	53	54	55	55	55	55	55	54	53	53	54	54	54	53	53	52	52	49	39	40	40	41	40	41
Tue	41	39	37	37	38	39	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—

How the readings split

Pecahan bacaan mengikut kategori IPU

GoodBaik9%13
ModerateSederhana91%137
UnhealthyTidak Sihat0%0
Very UnhealthySangat Tidak Sihat0%0
HazardousBerbahaya0%0

Based on 150 hourly station readings.

What it meant for this area

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

Nearby monitoring stations around Kuala Selangor

Perbandingan purata mingguan dengan stesen berhampiran

Klang115.2 API
Unhealthy38 away
Shah Alam107.7 API
Unhealthy41 away
Petaling Jaya112 API
Unhealthy44 away
Johan Setia115.1 API
Unhealthy46 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	90	89	87	86	85	84	83	84	82	81	80	79	80	79	80	82	83	84	84	83	82	80	78	77
Thu	77	77	79	79	78	78	78	77	77	77	77	77	77	77	76	74	72	71	72	73	74	74	75	76
Fri	76	76	73	74	74	74	74	75	75	75	76	76	76	76	78	79	80	80	81	80	79	79	78	77
Sat	77	77	77	77	77	77	76	76	76	75	74	72	70	68	66	66	65	65	64	65	66	65	65	65
Sun	66	66	65	65	64	63	63	62	62	62	62	61	61	62	61	60	60	60	60	58	56	56	55	54
Mon	53	54	55	55	55	55	55	54	53	53	54	54	54	53	53	52	52	49	39	40	40	41	40	41
Tue	41	39	37	37	38	39	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—

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	90	89	87	86	85	84	83	84	82	81	80	79	80	79	80	82	83	84	84	83	82	80	78	77
Thu	77	77	79	79	78	78	78	77	77	77	77	77	77	77	76	74	72	71	72	73	74	74	75	76
Fri	76	76	73	74	74	74	74	75	75	75	76	76	76	76	78	79	80	80	81	80	79	79	78	77
Sat	77	77	77	77	77	77	76	76	76	75	74	72	70	68	66	66	65	65	64	65	66	65	65	65
Sun	66	66	65	65	64	63	63	62	62	62	62	61	61	62	61	60	60	60	60	58	56	56	55	54
Mon	53	54	55	55	55	55	55	54	53	53	54	54	54	53	53	52	52	49	39	40	40	41	40	41
Tue	41	39	37	37	38	39	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—