21 – 27 Oct 2026 · Malaysia

Penang weekly air quality

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

65.5Weekly mean AQI · Moderate

Official DOE API mean: 52.9. 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

637 eligible observations · 35 excluded.

-27.7 AQI compared with the previous week’s eligible mean of 93.2.

Peak AQI: 99 at Seberang Perai · 23 Oct 2026, 13:00 (UTC+8).

Daily US AQI (PM2.5)

Low 16High 99AQI

21 Oct27 Oct

27 OctDaily mean · Peak 8150.8Avg AQI

Based on 87 hourly readings.

9 observations excluded because their pollutant is unknown or unsupported.

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	73.7Moderate	97	96 / 0
2026-10-22	81.9Moderate	97	96 / 0
2026-10-23	76.7Moderate	99	96 / 0
2026-10-24	74.2Moderate	96	96 / 0
2026-10-25	50.8Moderate	80	85 / 11
2026-10-26	43.9Good	68	81 / 15
2026-10-27	50.8Moderate	81	87 / 9

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	80.3	78.3	76	74.5	72.8	72	71	70.3	69.8	69.8	70	70.3	70	70	69.8	70.3	70.8	72	73	74.3	77	79.3	82.5	84.3
2026-10-22	84	84	84.3	84.3	84.3	84.8	84.8	83.8	83.8	84	83.8	83.5	83.3	84	83.3	82.8	81.8	80.8	80.5	79.3	78	76	74.5	73.8
2026-10-23	76	76	76.5	76.5	76.3	76.3	75.8	76.3	76.3	76.5	77.8	78	77.8	80	79	77.8	77.5	77.5	76.8	76.3	75.8	75.5	75	74.8
2026-10-24	74.3	73.8	74.3	75.8	76.3	77.5	78.8	79.3	79.3	79.3	78	77.8	76.8	73	73	73	72.8	72	71.8	70.3	69.8	69.5	67.8	66.5
2026-10-25	65.8	64.3	63.3	61	58	55.8	53.5	50.5	48.8	47.5	45	44	50	50.3	49.3	46.7	47.7	45.3	45.3	46	45	44.3	42.7	36.8
2026-10-26	43	37	37.5	38.5	39.3	38.5	38.3	38.8	38.8	47.3	45.7	47.7	49.3	50	49.3	49.7	49.3	49.3	48.7	48.3	47.7	47.3	48.7	42.3
2026-10-27	42.8	42.8	43.3	43.3	44.8	47.5	48	48.8	49	48.3	49.3	50	49.8	49.8	49	58	57.3	58.3	58.7	59.3	61.7	61.3	59.7	58.7

Observation categories

Good: 137

Moderate: 500

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

Stations by US AQI

Sorted by eligible mean AQI. Counts show the available coverage.

Location	Mean AQI	Peak AQI	Official DOE API mean	Eligible / excluded
Seberang Perai	80.4Moderate	99	67.5	168 / 0
Seberang Jaya	63.8Moderate	90	52.9	168 / 0
Minden	59.5Moderate	83	49.2	168 / 0
Balik Pulau	56.4Moderate	80	42.1	133 / 35

Penang air quality.
Weekly state review.

21 – 27 Oct 20267 days · 4 monitoring stations

Laporan mingguan Indeks Pencemaran Udara (IPU) bagi negeri Penang

Across Penang, air quality for the week of 21 – 27 Oct 2026 averaged an Air Pollutant Index (API) of 52.9 (Moderate).

State weekly average

52.9API

Moderate · Sederhana

Daily averages33 – 68.5 APIWed → Tue

Explore the week

State's peak reading: 80Seberang PeraiPeak reading across state
Cleanest area in state: 42.1Balik PulauLowest weekly average
Good to Moderate air: 100%of all readings672 readings
National standing: #3of 16 states/territoriesNational avg: 80.6 API

Seven days of air quality in Penang

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	62.6	46	79
Thu, 22 Oct	68.5	61	79
Fri, 23 Oct	65	58	80
Sat, 24 Oct	63.1	43	78
Sun, 25 Oct	39.3	15	67
Mon, 26 Oct	33	12	59
Tue, 27 Oct	39	15	68

Monitoring stations in Penang

Kedudukan stesen pemantauan di seluruh negeri mengikut purata mingguan

Scale 0 – 80

Seberang Jaya52.9avg
Pulau Pinang
25Moderate74
Seberang Perai67.5avg
Pulau Pinang
53Moderate80
Minden49.2avg
Pulau Pinang
21Good69
Balik Pulau42.1avg
Pulau Pinang
12Good67

The week, hour by hour

Purata negeri bagi setiap jam sepanjang tujuh hari

Read each row from midnight to 11pm, in Malaysia Time. Hourly state averages show when air quality shifted during each day of the week.

020406080APIBrighter cells ran hazier than the rest of this week (29.5 – 70.3 API)

Haziest hour of the week: Thu at 05:00 MYT, averaging API 70.3 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	66.5	65.3	63.8	62.5	61.3	60.8	60.3	60	60	60.3	60.5	60.5	60.5	60.3	60.3	60.5	60.8	61.8	62.3	63.3	65.3	66.8	68.8	70
Thu	70	70	70	70	70	70.3	70.3	69.8	69.8	70	69.8	69.8	69.5	69.8	69.3	69	68.5	67.8	67.8	66.8	65.8	64.5	63.5	63
Fri	64.5	64.5	64.8	64.8	64.8	64.8	64.5	64.8	64.8	65	65.8	65.8	65.8	67.3	66.5	65.8	65.5	65.5	65	64.5	64.3	64	63.8	63.5
Sat	63.3	63	63.3	64.3	64.8	65.5	66.3	66.8	66.8	66.8	65.8	65.8	65	62.5	62.5	62.5	62.3	61.8	61.5	60.3	60	59.8	57.8	56.5
Sun	56.3	55	53.8	51.8	48.8	46.8	44.5	42	40.3	38.5	36.3	35.3	34.3	34.8	34.3	33	33.8	32.5	33	33.8	32.8	32	30.5	29.8
Mon	29.5	29.8	30.3	31	31.5	31	30.8	31.3	31.3	32.3	31.3	33	34.3	34.8	34.8	35.3	35.8	35.8	35.8	35.8	35.3	34.3	34.3	34
Tue	34.3	34.3	34.5	34.5	35.5	37.5	38	38.8	39.3	39	40	40.5	40	39.5	39	39.3	39.5	40	41	41.8	42.8	43	42	41.3

How readings split

Pecahan bacaan mengikut kategori IPU

GoodBaik32%214
ModerateSederhana68%458
UnhealthyTidak Sihat0%0
Very UnhealthySangat Tidak Sihat0%0
HazardousBerbahaya0%0

Based on 672 hourly station readings.

Health guidelines

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