How is air quality in Malaysia in 2026?

The Department of Environment publishes hourly API readings on APIMS. API 0–50 is good, 51–100 moderate, 101–200 unhealthy for sensitive groups through the broader public as readings climb. In July 2025, DoE and ASMC linked unhealthy spikes in Nilai (around 162), Banting and Johan Setia (around 154), Putrajaya, and Alor Gajah to smoke drifting from Sumatra and Kalimantan hotspots rather than large local fires. Cheras and other Klang Valley stations also crossed unhealthy thresholds on following mornings.

Annual averages can improve while seasonal spikes still matter. Reporting on the 2025 World Air Quality Report noted Malaysia’s national PM2.5 average falling toward about 16 μg/m³ and Kuala Lumpur toward about 15.7 μg/m³, still well above the WHO annual guideline of 5 μg/m³. February haze episodes hit Penang harder in that year; July–August smoke lifted Petaling Jaya monthly PM2.5. Drier Southwest Monsoon stretches raise fire and haze odds: Dry season.

Prefer sealed bedrooms with a HEPA purifier if you have asthma, small children, or outdoor work. Check API before long runs along the KLCC park loop or Penang coastal paths. Highlands such as Cameron Highlands often feel clearer on ordinary weeks, yet regional plumes can still arrive: Highland climate.

West-coast cities (Living in Kuala Lumpur, Living in Penang, Living in Johor Bahru) sit in the usual downwind path when southwesterlies carry Sumatran smoke. Pair pollution days with indoor coworking and clinic access in healthcare costs. MetMalaysia’s MyCMAQ system also publishes multi-day PM2.5 and ozone forecasts for planning.