21 – 27 Oct 2026 · Malaysia

Alor Setar weekly air quality

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

59.1Weekly mean AQI · Moderate

Official DOE API mean: 43.7. 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

116 eligible observations · 34 excluded.

-12.5 AQI compared with the previous week’s eligible mean of 71.6.

Peak AQI: 75 at Alor Setar · 22 Oct 2026, 01:00 (UTC+8).

Daily US AQI (PM2.5)

Low 22High 75AQI

21 Oct27 Oct

27 OctDaily mean · Peak 2423.6Avg AQI

Based on 5 hourly readings.

1 observations excluded because their pollutant is unknown or unsupported.

6 of 7 days recorded.

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	59.8Moderate	74	24 / 0
2026-10-22	73.1Moderate	75	24 / 0
2026-10-23	61.5Moderate	65	24 / 0
2026-10-24	63.8Moderate	68	24 / 0
2026-10-25	36.2Good	54	15 / 9
2026-10-26	—Unavailable	—	0 / 24
2026-10-27	23.6Good	24	5 / 1

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	54	54	54	54	54	54	54	55	55	55	56	57	58	58	59	61	62	64	64	67	70	71	72	74
2026-10-22	74	75	75	75	75	75	75	74	74	74	75	75	75	75	74	74	72	72	72	71	70	68	68	67
2026-10-23	65	64	64	64	62	62	64	64	64	62	61	61	61	61	61	59	59	59	59	59	59	59	61	61
2026-10-24	62	64	64	65	65	67	67	67	68	68	68	68	67	65	65	64	64	62	61	61	59	58	57	55
2026-10-25	54	52	51	48	45	41	38	34	31	27	24	24	24	25	25	—	—	—	—	—	—	—	—	—
2026-10-26	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
2026-10-27	22	—	24	24	24	24	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—

Observation categories

Good: 17

Moderate: 99

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

Alor Setar air quality.
Weekly station review.

21 – 27 Oct 20267 days · Kedah

Laporan mingguan Indeks Pencemaran Udara (IPU) bagi stesen Alor Setar, Kedah

During the week of 21 – 27 Oct 2026, air quality at Alor Setar averaged an Air Pollutant Index (API) of 43.7 (Good). Readings peaked at 64.

Station weekly average

43.7API

Good · Baik

Daily averages17.8 – 62.5 APIWed → Tue

Explore the week

Week's peak reading: 64ModeratePeak during 7-day window
Rank in Kedah: #2of 4 stationsState avg: 44.2 API
Good to Moderate air: 100%of hourly readings150 readings recorded
National standing: #2of 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	51.4	44	63
Thu, 22 Oct	62.5	58	64
Fri, 23 Oct	54.5	53	57
Sat, 24 Oct	55.9	47	59
Sun, 25 Oct	24.7	18	45
Mon, 26 Oct	19.8	17	22
Tue, 27 Oct	17.8	17	18

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 Alor Setar shows local patterns like traffic peaks and afternoon haze accumulation.

020406080APIBrighter cells ran hazier than the rest of this week (17 – 64 API)

Haziest hour of the week: Thu at 01:00 MYT, averaging API 64 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	45	44	45	45	44	44	44	46	47	47	49	51	52	52	53	54	55	56	56	58	60	61	62	63
Thu	63	64	64	64	64	64	64	63	63	63	64	64	64	64	63	63	62	62	62	61	60	59	59	58
Fri	57	56	56	56	55	55	56	56	56	55	54	54	54	54	54	53	53	53	53	53	53	53	54	54
Sat	55	56	56	57	57	58	58	58	59	59	59	59	58	57	57	56	56	55	54	54	53	52	51	47
Sun	45	41	38	36	34	31	29	26	23	20	18	18	18	19	19	18	19	19	21	22	21	20	19	19
Mon	18	18	18	17	18	19	19	19	19	19	19	19	20	21	22	22	22	22	22	22	21	21	19	18
Tue	17	18	18	18	18	18	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—

How the readings split

Pecahan bacaan mengikut kategori IPU

GoodBaik44%66
ModerateSederhana56%84
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 Alor Setar

Perbandingan purata mingguan dengan stesen berhampiran

Kangar43.9 API
Good36 away
Sungai Petani50.4 API
Moderate58 away
Langkawi34.8 API
Good58 away
Seberang Jaya54.2 API
Moderate82 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	45	44	45	45	44	44	44	46	47	47	49	51	52	52	53	54	55	56	56	58	60	61	62	63
Thu	63	64	64	64	64	64	64	63	63	63	64	64	64	64	63	63	62	62	62	61	60	59	59	58
Fri	57	56	56	56	55	55	56	56	56	55	54	54	54	54	54	53	53	53	53	53	53	53	54	54
Sat	55	56	56	57	57	58	58	58	59	59	59	59	58	57	57	56	56	55	54	54	53	52	51	47
Sun	45	41	38	36	34	31	29	26	23	20	18	18	18	19	19	18	19	19	21	22	21	20	19	19
Mon	18	18	18	17	18	19	19	19	19	19	19	19	20	21	22	22	22	22	22	22	21	21	19	18
Tue	17	18	18	18	18	18	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—

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	45	44	45	45	44	44	44	46	47	47	49	51	52	52	53	54	55	56	56	58	60	61	62	63
Thu	63	64	64	64	64	64	64	63	63	63	64	64	64	64	63	63	62	62	62	61	60	59	59	58
Fri	57	56	56	56	55	55	56	56	56	55	54	54	54	54	54	53	53	53	53	53	53	53	54	54
Sat	55	56	56	57	57	58	58	58	59	59	59	59	58	57	57	56	56	55	54	54	53	52	51	47
Sun	45	41	38	36	34	31	29	26	23	20	18	18	18	19	19	18	19	19	21	22	21	20	19	19
Mon	18	18	18	17	18	19	19	19	19	19	19	19	20	21	22	22	22	22	22	22	21	21	19	18
Tue	17	18	18	18	18	18	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—