21 – 27 Oct 2026 · Malaysia

Kota Bharu weekly air quality

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

64.6Weekly mean AQI · Moderate

Official DOE API mean: 53.9. 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

150 eligible observations · 0 excluded.

-19.8 AQI compared with the previous week’s eligible mean of 84.4.

Peak AQI: 91 at Kota Bharu · 22 Oct 2026, 11:00 (UTC+8).

Daily US AQI (PM2.5)

Low 29High 91AQI

21 Oct27 Oct

27 OctDaily mean · Peak 5350.3Avg 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	80.1Moderate	87	24 / 0
2026-10-22	85.2Moderate	91	24 / 0
2026-10-23	69.9Moderate	78	24 / 0
2026-10-24	54.3Moderate	61	24 / 0
2026-10-25	56.6Moderate	61	24 / 0
2026-10-26	45.1Good	58	24 / 0
2026-10-27	50.3Moderate	53	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	87	86	86	84	84	83	83	81	80	78	78	80	78	78	78	80	80	78	77	75	77	77	77	78
2026-10-22	80	83	86	84	84	86	86	87	87	90	90	91	91	88	87	84	83	84	84	84	81	83	81	80
2026-10-23	78	75	75	75	75	74	74	74	74	74	72	71	71	71	70	68	67	64	64	62	64	62	62	62
2026-10-24	61	59	59	58	58	58	57	56	54	52	51	51	51	51	52	53	53	54	54	53	52	51	52	52
2026-10-25	52	52	52	52	52	52	53	53	53	55	56	57	58	59	61	61	61	61	61	61	61	59	59	58
2026-10-26	58	58	57	56	55	55	55	55	55	53	51	49	45	40	36	32	29	29	31	29	31	36	42	45
2026-10-27	45	48	51	52	53	53	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—

Observation categories

Good: 15

Moderate: 135

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

Kota Bharu air quality.
Weekly station review.

21 – 27 Oct 20267 days · Kelantan

Laporan mingguan Indeks Pencemaran Udara (IPU) bagi stesen Kota Bharu, Kelantan

During the week of 21 – 27 Oct 2026, air quality at Kota Bharu averaged an Air Pollutant Index (API) of 53.9 (Moderate). Readings peaked at 75.

Station weekly average

53.9API

Moderate · Sederhana

Daily averages36.4 – 70.7 APIWed → Tue

Explore the week

Week's peak reading: 75ModeratePeak during 7-day window
Rank in Kelantan: #1of 2 stationsState avg: 54.6 API
Good to Moderate air: 100%of hourly readings150 readings recorded
National standing: #11of 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	67.3	64	72
Thu, 22 Oct	70.7	67	75
Fri, 23 Oct	60.3	55	66
Sat, 24 Oct	44.6	38	54
Sun, 25 Oct	48.3	40	54
Mon, 26 Oct	36.4	22	52
Tue, 27 Oct	38.7	34	42

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 Kota Bharu shows local patterns like traffic peaks and afternoon haze accumulation.

020406080APIBrighter cells ran hazier than the rest of this week (22 – 75 API)

Haziest hour of the week: Thu at 11:00 MYT, averaging API 75 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	72	71	71	70	70	69	69	68	67	66	66	67	66	66	66	67	67	66	65	64	65	65	65	66
Thu	67	69	71	70	70	71	71	72	72	74	74	75	75	73	72	70	69	70	70	70	68	69	68	67
Fri	66	64	64	64	64	63	63	63	63	63	62	61	61	61	60	59	58	56	56	55	56	55	55	55
Sat	54	53	53	52	52	52	51	49	45	40	39	39	38	39	40	42	43	44	44	42	40	39	40	40
Sun	40	41	41	40	40	41	42	42	43	47	49	51	52	53	54	54	54	54	54	54	54	53	53	52
Mon	52	52	51	49	48	47	46	46	46	42	38	37	34	30	27	24	22	22	23	22	23	27	32	34
Tue	34	36	38	40	42	42	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—

How the readings split

Pecahan bacaan mengikut kategori IPU

GoodBaik37%55
ModerateSederhana63%95
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 Kota Bharu

Perbandingan purata mingguan dengan stesen berhampiran

Tanah Merah55.2 API
Moderate39 away
Besut47.6 API
Good54 away
Kuala Terengganu59.1 API
Moderate134 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	72	71	71	70	70	69	69	68	67	66	66	67	66	66	66	67	67	66	65	64	65	65	65	66
Thu	67	69	71	70	70	71	71	72	72	74	74	75	75	73	72	70	69	70	70	70	68	69	68	67
Fri	66	64	64	64	64	63	63	63	63	63	62	61	61	61	60	59	58	56	56	55	56	55	55	55
Sat	54	53	53	52	52	52	51	49	45	40	39	39	38	39	40	42	43	44	44	42	40	39	40	40
Sun	40	41	41	40	40	41	42	42	43	47	49	51	52	53	54	54	54	54	54	54	54	53	53	52
Mon	52	52	51	49	48	47	46	46	46	42	38	37	34	30	27	24	22	22	23	22	23	27	32	34
Tue	34	36	38	40	42	42	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—

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	72	71	71	70	70	69	69	68	67	66	66	67	66	66	66	67	67	66	65	64	65	65	65	66
Thu	67	69	71	70	70	71	71	72	72	74	74	75	75	73	72	70	69	70	70	70	68	69	68	67
Fri	66	64	64	64	64	63	63	63	63	63	62	61	61	61	60	59	58	56	56	55	56	55	55	55
Sat	54	53	53	52	52	52	51	49	45	40	39	39	38	39	40	42	43	44	44	42	40	39	40	40
Sun	40	41	41	40	40	41	42	42	43	47	49	51	52	53	54	54	54	54	54	54	54	53	53	52
Mon	52	52	51	49	48	47	46	46	46	42	38	37	34	30	27	24	22	22	23	22	23	27	32	34
Tue	34	36	38	40	42	42	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—