30 Sep – 6 Oct 2026 · Malaysia

Petaling Jaya weekly air quality

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

112.4Weekly mean AQI · Unhealthy for Sensitive Groups

Official DOE API mean: 95.7. 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

149 eligible observations · 0 excluded.

+20.7 AQI compared with the previous week’s eligible mean of 91.7.

Peak AQI: 165 at Petaling Jaya · 30 Sept 2026, 07:00 (UTC+8).

Daily US AQI (PM2.5)

Low 74High 165AQI

30 Sept6 Oct

6 OctDaily mean · Peak 111105Avg AQI

Based on 5 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
2026-09-30	159.6Unhealthy	165	24 / 0
2026-10-01	130.9Unhealthy for Sensitive Groups	152	24 / 0
2026-10-02	98.6Moderate	113	24 / 0
2026-10-03	83.3Moderate	94	24 / 0
2026-10-04	103.7Unhealthy for Sensitive Groups	109	24 / 0
2026-10-05	100.2Unhealthy for Sensitive Groups	111	24 / 0
2026-10-06	105Unhealthy for Sensitive Groups	111	5 / 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
2026-09-30	163	163	163	163	163	163	163	165	165	165	165	165	162	159	158	158	156	156	155	154	152	151	152	152
2026-10-01	152	152	152	152	151	147	144	140	136	132	130	126	128	126	124	120	120	120	118	115	115	115	113	113
2026-10-02	113	113	113	111	111	111	111	109	109	105	105	101	97	94	93	91	88	86	86	86	84	84	83	83
2026-10-03	81	80	77	77	75	75	74	75	75	75	77	78	80	81	86	87	90	91	94	94	94	94	94	94
2026-10-04	94	94	96	97	99	101	103	103	105	107	105	107	107	107	105	105	105	105	105	105	107	109	109	109
2026-10-05	111	109	109	105	101	99	96	97	97	94	94	94	96	96	97	99	99	101	103	103	103	103	99	99
2026-10-06	101	103	103	107	111	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—

Observation categories

Good: 0

Moderate: 55

Unhealthy for Sensitive Groups: 65

Unhealthy: 29

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

Petaling Jaya air quality.
Weekly station review.

30 Sep – 6 Oct 20267 days · Selangor

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

During the week of 30 Sep – 6 Oct 2026, air quality at Petaling Jaya averaged an Air Pollutant Index (API) of 95.7 (Moderate). Readings peaked at 161.

Station weekly average

95.7API

Moderate · Sederhana

Daily averages69.5 – 157.4 APIWed → Tue

Explore the week

Week's peak reading: 161UnhealthyPeak during 7-day window
Rank in Selangor: #3of 6 stationsState avg: 98.9 API
Good to Moderate air: 79%of hourly readings149 readings recorded
National standing: #52of 68 stationsNational avg: 81.5 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 · 0–175 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, 30 Sep	157.4	151	161
Thu, 1 Oct	108.3	87	152
Fri, 2 Oct	78.9	69	87
Sat, 3 Oct	69.5	63	77
Sun, 4 Oct	82.3	77	85
Mon, 5 Oct	80.5	77	86
Tue, 6 Oct	83	81	86

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 Petaling Jaya shows local patterns like traffic peaks and afternoon haze accumulation.

0255075100125150175APIBrighter cells ran hazier than the rest of this week (63 – 161 API)

Haziest hour of the week: Wed at 07:00 MYT, averaging API 161 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	160	160	160	160	160	160	160	161	161	161	161	161	159	157	156	156	155	155	154	153	152	151	152	152
Thu	152	152	152	152	151	138	124	109	99	97	96	94	95	94	93	91	91	91	90	88	88	88	87	87
Fri	87	87	87	86	86	86	86	85	85	83	83	81	79	77	76	75	73	71	71	71	70	70	69	69
Sat	68	67	65	65	64	64	63	64	64	64	65	66	67	68	71	72	74	75	77	77	77	77	77	77
Sun	77	77	78	79	80	81	82	82	83	84	83	84	84	84	83	83	83	83	83	83	84	85	85	85
Mon	86	85	85	83	81	80	78	79	79	77	77	77	78	78	79	80	80	81	82	82	82	82	80	80
Tue	81	82	82	84	86	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—

How the readings split

Pecahan bacaan mengikut kategori IPU

GoodBaik0%0
ModerateSederhana79%117
UnhealthyTidak Sihat21%32
Very UnhealthySangat Tidak Sihat0%0
HazardousBerbahaya0%0

Based on 149 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 Petaling Jaya

Perbandingan purata mingguan dengan stesen berhampiran

Shah Alam107.5 API
Unhealthy6.5 away
Batu Muda104.3 API
Unhealthy12 away
Cheras120.6 API
Unhealthy12 away
Johan Setia119.1 API
Unhealthy22 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	160	160	160	160	160	160	160	161	161	161	161	161	159	157	156	156	155	155	154	153	152	151	152	152
Thu	152	152	152	152	151	138	124	109	99	97	96	94	95	94	93	91	91	91	90	88	88	88	87	87
Fri	87	87	87	86	86	86	86	85	85	83	83	81	79	77	76	75	73	71	71	71	70	70	69	69
Sat	68	67	65	65	64	64	63	64	64	64	65	66	67	68	71	72	74	75	77	77	77	77	77	77
Sun	77	77	78	79	80	81	82	82	83	84	83	84	84	84	83	83	83	83	83	83	84	85	85	85
Mon	86	85	85	83	81	80	78	79	79	77	77	77	78	78	79	80	80	81	82	82	82	82	80	80
Tue	81	82	82	84	86	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—

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	160	160	160	160	160	160	160	161	161	161	161	161	159	157	156	156	155	155	154	153	152	151	152	152
Thu	152	152	152	152	151	138	124	109	99	97	96	94	95	94	93	91	91	91	90	88	88	88	87	87
Fri	87	87	87	86	86	86	86	85	85	83	83	81	79	77	76	75	73	71	71	71	70	70	69	69
Sat	68	67	65	65	64	64	63	64	64	64	65	66	67	68	71	72	74	75	77	77	77	77	77	77
Sun	77	77	78	79	80	81	82	82	83	84	83	84	84	84	83	83	83	83	83	83	84	85	85	85
Mon	86	85	85	83	81	80	78	79	79	77	77	77	78	78	79	80	80	81	82	82	82	82	80	80
Tue	81	82	82	84	86	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—