Haze bulletin ·
Haze in Malaysia, Wednesday, 4 November 2026
Air quality in Selangor reached a US EPA AQI of 122 at 12:00 am, measured at Bukit Gita Bayu — the highest reading we recorded anywhere in Malaysia on Wednesday, 4 November 2026. 2 regions spent at least one hour at AQI 101 or above.
- Highest reading
- 122Selangor
- Regions affected
- 2at AQI 101+
- Region-hours at 101+
- 3summed across regions
- Peak recorded
- 12:00 amBukit Gita Bayu
Region by region
Every region that reached AQI 101 or above on this day, worst first.
How the day ran in Selangor
The hour-by-hour shape of the worst-affected region.
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.
What this is, and is not
Read the figures with this in mind.
Each region’s figure is the highest reading among its monitoring stations in that hour, never an average — averaging would hide a genuinely bad station behind clean ones nearby. A region with one reporting station is therefore described by that station alone, and the station is named above so you can judge how representative it is.
These are US EPA AQI values published through the World Air Quality Index network. Malaysia’s Department of Environment publishes a separate Air Pollutant Index through APIMS on different breakpoints, so the official figure for this day will not match the numbers here. Nothing on this page constitutes an official haze declaration or a health directive.
A region appears only if we hold readings for it on this day. An absent region may have had clean air, or may simply have had no station publishing.
Other bulletins
Recent days on record.
- Tuesday, 3 November 2026166
- Monday, 2 November 2026156
- Sunday, 1 November 2026244
- Saturday, 31 October 2026204
- Friday, 30 October 2026170
- Thursday, 29 October 2026155
- Wednesday, 28 October 2026163