Is the air quality good in Kuala Lumpur?
As of October 20, 2026, at 8:00 PM (local time), air quality in Kuala Lumpur, Malaysia is unhealthy, with an AQI of 175, driven by traffic emissions, regional haze, and weather conditions.
Air quality is dynamic and, like the weather, can change frequently, Kuala Lumpur ranked as the most polluted major city in the world on Tuesday evening.
Click here for a real-time air quality map of Kuala Lumpur.
Although today's air quality is poor, it is important to note that the average PM2.5 concentration in 2025 for Kuala Lumpur was 15.7 µg/m³, corresponding to an AQI of 58 (“Moderate”), and was 3.1 times the WHO annual guideline of 5 µg/m³.
Kuala Lumpur, Malaysia, ranked as the most polluted major city as of October 20, 2026, at 8:00 PM (local time). Source: IQAir.
When will air quality improve in Kuala Lumpur?
Air quality in Kuala Lumpur is forecasted to improve by tomorrow, returning to the moderate range.
Hourly air quality forecast for Kuala Lumpur, Malaysia as of October 20, 2026. Source: IQAir.
However, this improvement may be temporary, as smoke from fires in Sumatra and Kalimantan continues to affect Peninsular Malaysia, with an ongoing risk of further transboundary haze.
Air quality map of Kuala Lumpur, Malaysia, as of October 20, 2026. Source: IQAir.
What is causing poor air quality in Kuala Lumpur?
Kuala Lumpur’s poor air quality is being worsened by smoke from fires in Sumatra and Kalimantan, Indonesia. The broader haze episode has prompted the ASEAN Specialised Meteorological Centre to activate Alert Level 3 for the southern ASEAN region, its highest alert level, indicating a high risk of severe transboundary haze (1).
Dry weather across much of the region favors continued fire activity. El Niño is also increasing the likelihood of hotter conditions and below-normal rainfall, which can prolong fires and haze. Prevailing southeasterly or southwesterly winds can transport smoke across national borders, while limited rainfall in burning areas reduces opportunities to suppress fires (2).
Fine particles in wildfire smoke, known as PM2.5, can remain airborne and travel long distances. This means air quality can worsen even when the fires are far from Kuala Lumpur.
How can I protect myself from poor air quality?
- Get a free air quality app for real-time air quality alerts and forecasts.
- Shut doors and windows and set the HVAC to recirculate mode.
- Contribute to your community’s outdoor air quality data.
- Stay indoors when air quality is poor; if you do need to go outdoors, wear a KN95/FFP2 mask.
- Run a high-performance air purifier to filter particles, gases, and other pollutants.
