Is Malaysia’s air safe to breathe right now?
With the return of haze and growing concern over air quality, many Malaysians are turning to the Air Pollution Index (API) to stay informed. But what exactly is the API, how is it measured in Malaysia, and which areas are currently affected? Whether you’re planning outdoor activities or just curious about what those numbers mean, here’s everything you need to know about Malaysia’s air pollution status—and how to stay safe.
Real-Time AQI Snapshot
- Malaysia’s real-time AQI: 50–52 (moderate) as of July 21, 2025, according to aqi.in
- Key pollutants: PM2.5 at 9 µg/m³, PM10 around 19 µg/m³ — well within the “good” range
- Temperature & humidity: Warm at ~31–32 °C, with humidity around 70%
Regional AQI Highlights
- Kuala Lumpur & Klang show moderate AQI (~52–56), fluctuating through the day
- Nilai, Negeri Sembilan faces poor air quality — AQI reached 187 (unhealthy) due to elevated PM2.5 at 106 µg/m³
- As of July 19, over 60 areas recorded moderate API readings (101–200), including Putrajaya (111) and Temerloh (104)
What Is the API/AQI Scale?
In Malaysia, the Air Pollution Index (API) is used with health descriptors
| API Range | Descriptor | Health Advice |
|---|---|---|
| 0–50 | Good | Suitable for all; no precautions needed. |
| 51–100 | Moderate | Safe for most; sensitive individuals should limit activity. |
| 101–200 | Unhealthy | Reduce outdoor exertion; elderly, kids should stay indoors. |
| 201–300 | Very Unhealthy | Everyone should avoid outdoor activity. |
| 301–500 | Hazardous | Emergency protocols: masks, stay indoors, no outdoor work. |
Seasonal Trends & Haze Feelings
- The infamous haze season peaks around September, due to slash-and-burn practices in Sumatra
- Kuala Lumpur’s worst AQI spikes often occur between August and October
Health & Lifestyle Tips
- Check hourly AQI via IQAir or aqi.in before going outdoors.
- During moderate AQI (50–100): sensitive people = wear N95 masks; limit long or heavy exercise.
- In unhealthy/unhealthy-for-sensitive groups zones (API 101–200): stay indoors, reduce outdoor exertion.
- Use air purifiers at home and keep windows closed during haze season.
Long-Term Improvements
Malaysia ranked 48th out of 98 countries for average AQI in 2024 (AQI⁺ ~68), improving over past years. But transboundary haze remains a recurring challenge—especially in September.
While Malaysian cities currently enjoy moderate air quality, hotspots like Nilai may reach hazardous levels. With the usual haze season on the horizon, staying informed and taking simple measures can help you breathe safer in the months to come.
