14 – 20 Oct 2026 · Malaysia

Johor weekly air quality

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

169.6Weekly mean AQI · Unhealthy

Official DOE API mean: 161.4. 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

1344 eligible observations · 0 excluded.

-6 AQI compared with the previous week’s eligible mean of 175.6.

Peak AQI: 234 at Pasir Gudang · 16 Oct 2026, 10:00 (UTC+8).

Daily US AQI (PM2.5)

Low 109High 234AQI

14 Oct20 Oct

20 OctDaily mean · Peak 162148.9Avg AQI

Based on 192 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
2026-10-14	164.9Unhealthy	197	192 / 0
2026-10-15	180Unhealthy	212	192 / 0
2026-10-16	184.9Unhealthy	234	192 / 0
2026-10-17	180.8Unhealthy	224	192 / 0
2026-10-18	175.9Unhealthy	212	192 / 0
2026-10-19	152.1Unhealthy	181	192 / 0
2026-10-20	148.9Unhealthy for Sensitive Groups	162	192 / 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
2026-10-14	160.5	160	159.6	159.1	159	159	159.1	159.1	159	159.3	159.1	159.3	160	162	163.1	165.3	167.1	169.8	172.3	174.5	176	177.1	178.5	178.9
2026-10-15	179.5	179.6	180.5	180.5	180.8	180.6	181	180.8	181.3	181.1	181.3	181	180.6	180	179.5	179.4	179.4	178.9	178.6	178.3	178.8	179.1	179.6	180.1
2026-10-16	181.5	182	182.5	183.5	183.8	184.5	184.9	185.4	185.8	186	187	187.3	187.9	188.4	188.6	187.6	187	186.4	185.5	184	183.3	182.5	182.4	181.1
2026-10-17	180.6	180.4	180.1	180.6	180.6	180.5	180.3	180.5	181.3	180.4	180	180.1	179.6	179.5	179.6	180.8	181.1	181.3	181.3	182.1	182	182.1	181.5	181.8
2026-10-18	181.3	180.5	180.5	180	180	180.1	179.8	179.9	180.3	179.9	179.9	179.5	178.9	177.5	176.1	174.4	173.4	172.5	170.5	169.6	168.4	167.3	166.1	165.4
2026-10-19	164.3	163.4	162.4	161.1	160.4	160	158.8	157.9	156.9	155	153.5	152.4	151.1	149.9	148.3	147.4	145.3	143.6	143.3	142.6	142.3	143	143.5	143.4
2026-10-20	143.5	143.5	144	144.4	144.8	145.8	146.1	146.9	147.4	148.1	148.4	149.1	149.4	150.1	150.5	151.4	152	152.4	151.6	152.1	152.5	153	153.1	152.9

Observation categories

Good: 0

Moderate: 0

Unhealthy for Sensitive Groups: 150

Unhealthy: 1103

Very Unhealthy: 91

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
Pasir Gudang	193.2Unhealthy	234	180.6	168 / 0
Larkin	181.4Unhealthy	227	172.6	168 / 0
Pengerang	170.2Unhealthy	192	161	168 / 0
Kota Tinggi	169.8Unhealthy	194	163.8	168 / 0
Batu Pahat	169.3Unhealthy	196	162.8	168 / 0
Tangkak	165.5Unhealthy	189	161.2	168 / 0
Kluang	161Unhealthy	178	155.5	168 / 0
Segamat	146.6Unhealthy for Sensitive Groups	167	133.9	168 / 0

Johor air quality.
Weekly state review.

14 – 20 Oct 20267 days · 8 monitoring stations

Laporan mingguan Indeks Pencemaran Udara (IPU) bagi negeri Johor

Across Johor, air quality for the week of 14 – 20 Oct 2026 averaged an Air Pollutant Index (API) of 161.4 (Unhealthy).

State weekly average

161.4API

Unhealthy · Tidak Sihat

Daily averages141.7 – 175 APIWed → Tue

Explore the week

State's peak reading: 209Pasir GudangPeak reading across state
Cleanest area in state: 133.9SegamatLowest weekly average
Good to Moderate air: 6%of all readings1,344 readings
National standing: #12of 16 states/territoriesNational avg: 108.7 API

Seven days of air quality in Johor

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 · 0–250 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, 14 Oct	157.7	92	185
Thu, 15 Oct	172.3	157	193
Fri, 16 Oct	175	155	209
Sat, 17 Oct	172.3	155	199
Sun, 18 Oct	169.2	152	193
Mon, 19 Oct	141.7	85	173
Tue, 20 Oct	141.7	86	159

Monitoring stations in Johor

Kedudukan stesen pemantauan di seluruh negeri mengikut purata mingguan

Scale 0 – 250

Segamat133.9avg
Johor
85Unhealthy163
Batu Pahat162.8avg
Johor
109Unhealthy184
Kluang155.5avg
Johor
98Unhealthy171
Larkin172.6avg
Johor
136Unhealthy202
Pasir Gudang180.6avg
Johor
155Unhealthy209
Pengerang161avg
Johor
95Unhealthy181
Kota Tinggi163.8avg
Johor
117Unhealthy183
Tangkak161.2avg
Johor
130Unhealthy179

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.

050100150200APIBrighter cells ran hazier than the rest of this week (127 – 177.5 API)

Haziest hour of the week: Fri at 13:00 MYT, averaging API 177.5 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	153	152.6	152.4	152.1	152.1	152.3	152.4	152.4	152.3	152.5	152.3	151.9	152.5	154.3	155.1	156.5	157.9	163	166.8	168.3	169.4	170.3	171.3	171.6
Thu	172.1	172.3	172.8	172.8	172.9	172.8	173	172.9	173	173.1	173.3	173.1	172.9	172.4	172.1	172	171.9	171.5	171.4	171.1	171.3	171.5	171.9	172.1
Fri	172.9	173.3	173.5	174	174.1	174.8	175	175.4	175.8	176	176.8	176.8	177.1	177.5	177.5	176.8	176.3	175.6	175	174.1	173.9	173.4	173.3	172.6
Sat	172.4	172	171.9	172.1	172.1	172.1	171.9	172.1	172.5	172.1	171.9	172	171.8	171.6	171.6	172.3	172.5	172.5	172.6	173.3	173.1	173.3	172.9	173.1
Sun	172.9	172.5	172.6	172.4	172.3	172.4	172.1	172.3	172.4	172	172	171.8	171.3	170.4	169.4	168.3	167.5	166.8	165.4	164.6	163.9	163	162.1	161.6
Mon	160.8	160	158	156	154.9	153.6	151.8	150.9	149.9	147	143.6	143.3	141	138.8	134.4	133.5	129.1	127	127.6	127.3	127.3	128.3	129	128.5
Tue	129.6	130	131.4	132.9	134.3	135.3	136.9	138.4	139.8	142.8	143	144	145.3	145.9	146.1	146.8	147.1	147.4	146.9	147.1	147.3	147.5	147.5	147.4

How readings split

Pecahan bacaan mengikut kategori IPU

GoodBaik0%0
ModerateSederhana6%74
UnhealthyTidak Sihat94%1,257
Very UnhealthySangat Tidak Sihat1%13
HazardousBerbahaya0%0

Based on 1,344 hourly station readings.

Health guidelines

Panduan kesihatan mengikut kategori kualiti udara

Limit prolonged outdoor activity. Children, older adults, pregnant women and people with respiratory or heart conditions should stay indoors where possible. A well-fitted N95 mask helps outdoors.

Hadkan aktiviti luar yang berpanjangan. Kanak-kanak, warga emas, ibu mengandung dan pesakit pernafasan atau jantung dinasihatkan berada di dalam bangunan. Pelitup muka N95 membantu di luar.

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