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21 – 27 Oct 2026 · Malaysia

Klang weekly air quality

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

124.4Weekly mean AQI · Unhealthy for Sensitive Groups

Official DOE API mean: 115.6. 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.

-53.4 AQI compared with the previous week’s eligible mean of 177.8.

Peak AQI: 167 at Klang · 21 Oct 2026, 00:00 (UTC+8).

Daily US AQI (PM2.5)

Low 51High 167AQI
087.5175
21 Oct27 Oct
27 OctDaily mean · Peak 6159.6Avg 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.

DayMean AQIPeak AQIEligible / excluded
2026-10-21164Unhealthy16724 / 0
2026-10-22157.7Unhealthy16224 / 0
2026-10-23159.7Unhealthy16324 / 0
2026-10-24135.5Unhealthy for Sensitive Groups15224 / 0
2026-10-2588.6Moderate11724 / 0
2026-10-2654.3Moderate5824 / 0
2026-10-2759.6Moderate615 / 0

Hourly means (UTC+8)

Day01234567891011121314151617181920212223
2026-10-21167166166165165163163162162162163165165165165165165165163163163163162162
2026-10-22160160160160160159159158158156156155155155156156155155155156159160160162
2026-10-23162162162163163163163163162162160160160159158159159159158158155154154154
2026-10-24152152152152151149148146143141139139139138134128124122120118117115115117
2026-10-2511711510910710399949191919090878484848381787574716761
2026-10-26585656545455565656565553545453525152525353545556
2026-10-275859596161———————————————————

Observation categories

Good: 0

Moderate: 48

Unhealthy for Sensitive Groups: 24

Unhealthy: 77

Very Unhealthy: 0

Hazardous: 0

US AQI scale
AQICategory
0–50Good
51–100Moderate
101–150Unhealthy for Sensitive Groups
151–200Unhealthy
201–300Very Unhealthy
301+Hazardous
View the official DOE API report
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Klang air quality.
Weekly station review.

7 days · Selangor

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

During the week of 21 – 27 Oct 2026, air quality at Klang averaged an Air Pollutant Index (API) of 115.6 (Unhealthy). Readings peaked at 163.

Station weekly average

115.6API

Unhealthy · Tidak Sihat

Daily averages45.5 – 160.5 APIWed → Tue
Explore the week
Week's peak reading
163UnhealthyPeak during 7-day window
Rank in Selangor
#6of 6 stationsState avg: 104.5 API
Good to Moderate air
42%of hourly readings149 readings recorded
National standing
#59of 68 stationsNational avg: 83.6 API

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 Klang shows local patterns like traffic peaks and afternoon haze accumulation.

WedWed 00:00 MYT — API 163Wed 01:00 MYT — API 162Wed 02:00 MYT — API 162Wed 03:00 MYT — API 161Wed 04:00 MYT — API 161Wed 05:00 MYT — API 160Wed 06:00 MYT — API 160Wed 07:00 MYT — API 159Wed 08:00 MYT — API 159Wed 09:00 MYT — API 159Wed 10:00 MYT — API 160Wed 11:00 MYT — API 161Wed 12:00 MYT — API 161Wed 13:00 MYT — API 161Wed 14:00 MYT — API 161Wed 15:00 MYT — API 161Wed 16:00 MYT — API 161Wed 17:00 MYT — API 161Wed 18:00 MYT — API 160Wed 19:00 MYT — API 160Wed 20:00 MYT — API 160Wed 21:00 MYT — API 160Wed 22:00 MYT — API 159Wed 23:00 MYT — API 159ThuThu 00:00 MYT — API 158Thu 01:00 MYT — API 158Thu 02:00 MYT — API 158Thu 03:00 MYT — API 158Thu 04:00 MYT — API 158Thu 05:00 MYT — API 157Thu 06:00 MYT — API 157Thu 07:00 MYT — API 156Thu 08:00 MYT — API 156Thu 09:00 MYT — API 155Thu 10:00 MYT — API 155Thu 11:00 MYT — API 154Thu 12:00 MYT — API 154Thu 13:00 MYT — API 154Thu 14:00 MYT — API 155Thu 15:00 MYT — API 155Thu 16:00 MYT — API 154Thu 17:00 MYT — API 154Thu 18:00 MYT — API 154Thu 19:00 MYT — API 155Thu 20:00 MYT — API 157Thu 21:00 MYT — API 158Thu 22:00 MYT — API 158Thu 23:00 MYT — API 159FriFri 00:00 MYT — API 159Fri 01:00 MYT — API 159Fri 02:00 MYT — API 159Fri 03:00 MYT — API 160Fri 04:00 MYT — API 160Fri 05:00 MYT — API 160Fri 06:00 MYT — API 160Fri 07:00 MYT — API 160Fri 08:00 MYT — API 159Fri 09:00 MYT — API 159Fri 10:00 MYT — API 158Fri 11:00 MYT — API 158Fri 12:00 MYT — API 158Fri 13:00 MYT — API 157Fri 14:00 MYT — API 156Fri 15:00 MYT — API 157Fri 16:00 MYT — API 157Fri 17:00 MYT — API 157Fri 18:00 MYT — API 156Fri 19:00 MYT — API 156Fri 20:00 MYT — API 154Fri 21:00 MYT — API 153Fri 22:00 MYT — API 153Fri 23:00 MYT — API 153SatSat 00:00 MYT — API 152Sat 01:00 MYT — API 152Sat 02:00 MYT — API 152Sat 03:00 MYT — API 152Sat 04:00 MYT — API 151Sat 05:00 MYT — API 147Sat 06:00 MYT — API 141Sat 07:00 MYT — API 133Sat 08:00 MYT — API 121Sat 09:00 MYT — API 113Sat 10:00 MYT — API 107Sat 11:00 MYT — API 105Sat 12:00 MYT — API 104Sat 13:00 MYT — API 102Sat 14:00 MYT — API 98Sat 15:00 MYT — API 95Sat 16:00 MYT — API 93Sat 17:00 MYT — API 92Sat 18:00 MYT — API 91Sat 19:00 MYT — API 90Sat 20:00 MYT — API 89Sat 21:00 MYT — API 88Sat 22:00 MYT — API 88Sat 23:00 MYT — API 89SunSun 00:00 MYT — API 89Sun 01:00 MYT — API 88Sun 02:00 MYT — API 85Sun 03:00 MYT — API 84Sun 04:00 MYT — API 82Sun 05:00 MYT — API 80Sun 06:00 MYT — API 77Sun 07:00 MYT — API 75Sun 08:00 MYT — API 75Sun 09:00 MYT — API 75Sun 10:00 MYT — API 74Sun 11:00 MYT — API 74Sun 12:00 MYT — API 72Sun 13:00 MYT — API 70Sun 14:00 MYT — API 70Sun 15:00 MYT — API 70Sun 16:00 MYT — API 69Sun 17:00 MYT — API 68Sun 18:00 MYT — API 66Sun 19:00 MYT — API 64Sun 20:00 MYT — API 63Sun 21:00 MYT — API 61Sun 22:00 MYT — API 58Sun 23:00 MYT — API 54MonMon 00:00 MYT — API 52Mon 01:00 MYT — API 50Mon 02:00 MYT — API 49Mon 03:00 MYT — API 45Mon 04:00 MYT — API 45Mon 05:00 MYT — API 48Mon 06:00 MYT — API 49Mon 07:00 MYT — API 50Mon 08:00 MYT — API 50Mon 09:00 MYT — API 49Mon 10:00 MYT — API 47Mon 11:00 MYT — API 43Mon 12:00 MYT — API 45Mon 13:00 MYT — API 44Mon 14:00 MYT — API 42Mon 15:00 MYT — API 40Mon 16:00 MYT — API 38Mon 17:00 MYT — API 41Mon 18:00 MYT — API 41Mon 19:00 MYT — API 42Mon 20:00 MYT — API 43Mon 21:00 MYT — API 44Mon 22:00 MYT — API 46Mon 23:00 MYT — API 49TueTue 00:00 MYT — API 52Tue 01:00 MYT — API 53Tue 02:00 MYT — API 53Tue 03:00 MYT — API 54Tue 04:00 MYT — API 54Tue 05:00 — no readingTue 06:00 — no readingTue 07:00 — no readingTue 08:00 — no readingTue 09:00 — no readingTue 10:00 — no readingTue 11:00 — no readingTue 12:00 — no readingTue 13:00 — no readingTue 14:00 — no readingTue 15:00 — no readingTue 16:00 — no readingTue 17:00 — no readingTue 18:00 — no readingTue 19:00 — no readingTue 20:00 — no readingTue 21:00 — no readingTue 22:00 — no readingTue 23:00 — no reading0003060912151821
0255075100125150175APIBrighter cells ran hazier than the rest of this week (38 – 163 API)

Haziest hour of the week: Wed at 00:00 MYT, averaging API 163 nationwide.

View the hourly figures as a table
National average API by hour, Malaysia Time
Day000102030405060708091011121314151617181920212223
Wed163162162161161160160159159159160161161161161161161161160160160160159159
Thu158158158158158157157156156155155154154154155155154154154155157158158159
Fri159159159160160160160160159159158158158157156157157157156156154153153153
Sat15215215215215114714113312111310710510410298959392919089888889
Sun898885848280777575757474727070706968666463615854
Mon525049454548495050494743454442403841414243444649
Tue5253535454———————————————————

How the readings split

Pecahan bacaan mengikut kategori IPU

Good: 15% (23 readings)Moderate: 27% (40 readings)Unhealthy: 58% (86 readings)58%Unhealthy
  • GoodBaik15%23
  • ModerateSederhana27%40
  • UnhealthyTidak Sihat58%86
  • 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

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
APICategoryKategori
0–50GoodBaik
51–100ModerateSederhana
101–200UnhealthyTidak Sihat
201–300Very UnhealthySangat Tidak Sihat
301+HazardousBerbahaya

Nearby monitoring stations around Klang

Perbandingan purata mingguan dengan stesen berhampiran