21 – 27 Oct 2026 · Malaysia

Besut weekly air quality

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

57.2Weekly mean AQI · Moderate

Official DOE API mean: 47.6. 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.

-29.4 AQI compared with the previous week’s eligible mean of 86.6.

Peak AQI: 78 at Besut · 21 Oct 2026, 10:00 (UTC+8).

Daily US AQI (PM2.5)

Low 32High 78AQI

21 Oct27 Oct

27 OctDaily mean · Peak 4846.2Avg 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	75.6Moderate	78	24 / 0
2026-10-22	73Moderate	75	24 / 0
2026-10-23	60.8Moderate	72	24 / 0
2026-10-24	37.8Good	45	24 / 0
2026-10-25	54.9Moderate	58	24 / 0
2026-10-26	44.3Good	56	24 / 0
2026-10-27	46.2Good	48	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	75	75	75	77	77	77	77	77	77	77	78	78	77	75	75	75	74	74	74	74	74	74	74	74
2026-10-22	74	74	74	74	74	75	75	75	75	75	75	75	74	74	74	72	71	71	70	68	70	70	71	72
2026-10-23	72	72	71	70	68	67	65	65	64	64	62	61	61	59	58	58	58	57	56	55	54	52	48	41
2026-10-24	38	37	37	37	36	36	36	34	33	33	33	34	33	34	36	37	38	42	42	42	44	44	45	45
2026-10-25	47	48	49	51	52	53	53	54	54	55	55	55	56	58	58	58	58	58	58	58	58	58	57	57
2026-10-26	56	55	55	54	53	53	52	51	51	51	47	47	44	40	36	34	33	32	33	33	34	37	40	41
2026-10-27	44	45	45	47	48	48	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—

Observation categories

Good: 49

Moderate: 101

Unhealthy for Sensitive Groups: 0

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

Besut air quality.
Weekly station review.

21 – 27 Oct 20267 days · Terengganu

Laporan mingguan Indeks Pencemaran Udara (IPU) bagi stesen Besut, Terengganu

During the week of 21 – 27 Oct 2026, air quality at Besut averaged an Air Pollutant Index (API) of 47.6 (Good). Readings peaked at 66.

Station weekly average

47.6API

Good · Baik

Daily averages28.6 – 64.2 APIWed → Tue

Explore the week

Week's peak reading: 66ModeratePeak during 7-day window
Rank in Terengganu: #1of 4 stationsState avg: 68.5 API
Good to Moderate air: 100%of hourly readings150 readings recorded
National standing: #5of 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 · 0–80 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	64.2	63	66
Thu, 22 Oct	62.4	59	64
Fri, 23 Oct	52.5	31	62
Sat, 24 Oct	28.6	25	34
Sun, 25 Oct	46.8	35	52
Mon, 26 Oct	34.6	24	50
Tue, 27 Oct	34.7	33	36

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 Besut shows local patterns like traffic peaks and afternoon haze accumulation.

020406080APIBrighter cells ran hazier than the rest of this week (24 – 66 API)

Haziest hour of the week: Wed at 10:00 MYT, averaging API 66 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	64	64	64	65	65	65	65	65	65	65	66	66	65	64	64	64	63	63	63	63	63	63	63	63
Thu	63	63	63	63	63	64	64	64	64	64	64	64	63	63	63	62	61	61	60	59	60	60	61	62
Fri	62	62	61	60	59	58	57	57	56	56	55	54	54	53	52	52	52	51	50	48	44	41	36	31
Sat	29	28	28	28	27	27	27	26	25	25	25	26	25	26	27	28	29	32	32	32	33	33	34	34
Sun	35	36	37	38	40	42	43	45	45	46	48	48	50	52	52	52	52	52	52	52	52	52	51	51
Mon	50	48	47	45	43	42	40	39	39	38	35	35	33	30	27	26	25	24	25	25	26	28	30	31
Tue	33	34	34	35	36	36	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—

How the readings split

Pecahan bacaan mengikut kategori IPU

GoodBaik49%73
ModerateSederhana51%77
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 good. Outdoor activities are fine for everyone.

Kualiti udara baik. Aktiviti luar sesuai untuk semua.

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 Besut

Perbandingan purata mingguan dengan stesen berhampiran

Tanah Merah55.2 API
Moderate43 away
Kota Bharu53.9 API
Moderate54 away
Kuala Terengganu59.1 API
Moderate83 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	64	64	64	65	65	65	65	65	65	65	66	66	65	64	64	64	63	63	63	63	63	63	63	63
Thu	63	63	63	63	63	64	64	64	64	64	64	64	63	63	63	62	61	61	60	59	60	60	61	62
Fri	62	62	61	60	59	58	57	57	56	56	55	54	54	53	52	52	52	51	50	48	44	41	36	31
Sat	29	28	28	28	27	27	27	26	25	25	25	26	25	26	27	28	29	32	32	32	33	33	34	34
Sun	35	36	37	38	40	42	43	45	45	46	48	48	50	52	52	52	52	52	52	52	52	52	51	51
Mon	50	48	47	45	43	42	40	39	39	38	35	35	33	30	27	26	25	24	25	25	26	28	30	31
Tue	33	34	34	35	36	36	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—

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	64	64	64	65	65	65	65	65	65	65	66	66	65	64	64	64	63	63	63	63	63	63	63	63
Thu	63	63	63	63	63	64	64	64	64	64	64	64	63	63	63	62	61	61	60	59	60	60	61	62
Fri	62	62	61	60	59	58	57	57	56	56	55	54	54	53	52	52	52	51	50	48	44	41	36	31
Sat	29	28	28	28	27	27	27	26	25	25	25	26	25	26	27	28	29	32	32	32	33	33	34	34
Sun	35	36	37	38	40	42	43	45	45	46	48	48	50	52	52	52	52	52	52	52	52	52	51	51
Mon	50	48	47	45	43	42	40	39	39	38	35	35	33	30	27	26	25	24	25	25	26	28	30	31
Tue	33	34	34	35	36	36	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—