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Air quality plummets across Malaysia as haze worsens

Malaysia's air quality deteriorated significantly on Wednesday with 35 monitoring stations recording unhealthy pollution levels, driven by transboundary haze affecting the region.

LSN Malaysia · 18 September 2026

Air pollution levels across Malaysia have reached concerning heights, with midday readings on Wednesday showing 35 monitoring stations in the unhealthy category. Johan Setia in Selangor recorded the most severe air quality index reading of 193, indicating hazardous conditions that pose health risks to the general population.

The widespread deterioration in air quality reflects the ongoing haze situation affecting South and Southeast Asia. Monitoring stations nationwide have reported elevated API readings throughout the day, with several areas experiencing air quality classified as unhealthy for sensitive groups or the general population.

The haze event underscores the transboundary nature of air pollution in the region, with atmospheric conditions and wind patterns carrying pollutants across national borders. Health authorities typically advise vulnerable groups including children, the elderly, and those with respiratory conditions to limit outdoor activities during periods of poor air quality.

Forecast models and meteorological updates will be crucial in determining whether conditions improve in the coming days. Authorities continue to monitor air quality levels at designated monitoring stations throughout the country to track pollution trends and provide timely advisories to the public.