Air quality in Selangor right now
Highest station AQI
59Unusually sensitive people should consider limiting long outdoor exertion.
- Measured at
- Shah Alam, Selangor, Malaysia
- Reading taken
- 12:00 pm
- Stations reporting
- 7 of 7
- Latest day vs previous
- Up 3 from 124
As of 28 Oct, 12:00 pm MYT, the highest reporting monitoring station in Selangor recorded a US EPA Air Quality Index of 59, which is Moderate. The reading came from Shah Alam, Selangor, Malaysia, with 7 of 7 stations in the region reporting. This is not Malaysia's official Air Pollutant Index.
Selangor’s recent air quality
Built from our own archive of hourly readings, so it shows what actually happened here rather than only what is happening now.
Highest station reading in Selangor each hour, on the US EPA AQI scale. A break in the line is an hour with no reporting station, not a reading of zero.
The highest reading recorded in Selangor on each day, Malaysian time. Days with no reporting station are absent rather than shown as zero.
The worst reading we hold for Selangor is 215 on Tuesday, 20 October 2026. In the last 13 days, 13 days have had at least one hour at 101 or above.
Our archive for this region starts Friday, 16 October 2026 and now covers 13 days.
Show the last 13 days as a table
| Date | Peak | Band | Mean of hourly peaks | Hours at 101+ |
|---|---|---|---|---|
| Wednesday, 28 October 2026 | 127 | Unhealthy for Sensitive Groups | 81 | 2 of 13 |
| Tuesday, 27 October 2026 | 124 | Unhealthy for Sensitive Groups | 89 | 4 of 23 |
| Monday, 26 October 2026 | 105 | Unhealthy for Sensitive Groups | 68 | 2 of 24 |
| Sunday, 25 October 2026 | 158 | Unhealthy | 90 | 5 of 24 |
| Saturday, 24 October 2026 | 187 | Unhealthy | 161 | 24 of 24 |
| Friday, 23 October 2026 | 187 | Unhealthy | 165 | 24 of 24 |
| Thursday, 22 October 2026 | 193 | Unhealthy | 170 | 24 of 24 |
| Wednesday, 21 October 2026 | 195 | Unhealthy | 174 | 24 of 24 |
| Tuesday, 20 October 2026 | 215 | Very Unhealthy | 187 | 24 of 24 |
| Monday, 19 October 2026 | 210 | Very Unhealthy | 177 | 24 of 24 |
| Sunday, 18 October 2026 | 190 | Unhealthy | 174 | 24 of 24 |
| Saturday, 17 October 2026 | 207 | Very Unhealthy | 187 | 24 of 24 |
| Friday, 16 October 2026 | 211 | Very Unhealthy | 182 | 23 of 23 |
Monitoring stations in Selangor
Every station inside the state boundary that has published recently. The headline figure above is the highest of these, never an average.
| Station | AQI | Band | Reading taken |
|---|---|---|---|
| Shah Alam, Selangor, Malaysia | 59 | Moderate | 12:00 pm |
| Pelabuhan Kelang, Selangor, Malaysia | 58 | Moderate | 12:00 pm |
| Banting, Selangor, Malaysia | 56 | Moderate | 12:00 pm |
| Petaling Jaya, Selangor, Malaysia | 53 | Moderate | 12:00 pm |
| Kuala Selangor, Selangor, Malaysia | 31 | Good | 12:00 pm |
| Bukit Gita Bayu | 16 | Good | 12:56 pm |
| Jalan Anggun 3P | 12 | Good | 12:55 pm |
US EPA AQI scale (WAQI)
- Good 0–50
- Moderate 51–100
- Unhealthy for Sensitive Groups 101–150
- Unhealthy 151–200
- Very Unhealthy 201–300
- Hazardous 301+
- No current data
What drives air quality in Selangor
Why this state’s readings move the way they do.
Selangor is the most industrialised and most densely populated state in Malaysia, and it wraps around Kuala Lumpur on every side, so the two share one airshed and usually one kind of day. Port Klang, the Shah Alam and Klang industrial belts, and the daily commuter traffic through the Klang Valley give the state a high baseline before any haze arrives.
Main local sources
- Industrial activity across the Klang, Shah Alam and Subang belts
- Port Klang shipping and the freight traffic serving it
- The densest commuter traffic in the country, peaking morning and evening
- Transboundary haze arriving directly off the Strait of Malacca
How the year runs here
Selangor is exposed on both counts: it has the country’s largest local emission load year-round, and it sits on the coast that the June–September southwest monsoon haze reaches first. Heavy rain is what usually resets it.
Readings on this page cover Shah Alam, Petaling Jaya, Klang, Subang Jaya, Kajang, Port Klang and Rawang, to the extent that stations in those areas are reporting. Each figure is named with the station it came from, so you can judge how close it is to you.
Jerebu and haze in Selangor
When the air here crosses into unhealthy territory, we write it up.
We publish a dated bulletin for every day on which any Malaysian state reaches AQI 101 or above — the point at which health advice starts naming who should stay indoors. The bulletins are built from the same hourly archive as the charts above, so they record what the stations actually read rather than restating a headline.
Selangor has had 13 such days in the last 13.
Read the haze bulletins →Eating out in Selangor
Places we have written up in this part of the country.
Air quality in Selangor: common questions
Asked about this state specifically.
Is Selangor’s reading the same as Kuala Lumpur’s?
They are usually close, because KL sits inside Selangor’s outer boundary and the two share an airshed, but they are measured separately and reported separately here. Stations in Kuala Lumpur and Putrajaya are tested against those territories first precisely so they are not counted as Selangor’s.
Which part of Selangor usually reads highest?
The industrial and port districts along the coast and the Klang Valley corridor carry more local emissions than the quieter northern and eastern districts. Rather than guess, this page names the specific station behind the figure, so you can see where in the state the reading came from.
For how the index is calculated, why it differs from Malaysia’s official API, and where the data comes from, see the national air quality page.
Air quality elsewhere in Malaysia
Live readings for every other state and territory.
Readings from the World Air Quality Index project, on the US EPA scale. This is not Malaysia’s official Air Pollutant Index — for that, see APIMS from the Department of Environment. State boundaries from geoBoundaries (ADM1, CC BY 4.0).