A severe haze episode has again blanketed parts of the Klang Valley, with the Air Pollutant Index (API) rising above the "Unhealthy" threshold of 150, prompting public concern over air quality and health risks. This recurring pollution crisis, lasting nearly three decades, stems from transboundary smoke originating primarily from land and forest fires in the region.
In response to ongoing haze problems, the Association of Southeast Asian Nations (ASEAN) established the Asean Agreement on Transboundary Haze Pollution (AATHP) in 2002. This accord created a framework for monitoring and preventing haze caused by slash-and-burn practices across national borders. Advances in satellite monitoring have enhanced authorities’ ability to identify illegal burning activities in near real time. Domestically, Indonesia has taken steps to deter such fires by penalizing plantation companies, closing burnt concession areas, and prosecuting more than a hundred individuals during recent burning seasons.
Despite these efforts, critics note that the AATHP lacks binding enforcement powers and clear penalties, limiting its effectiveness in curbing transboundary haze. The Natural Resources and Environmental Sustainability Ministry (NRES) is reportedly reviewing options to draft legislation modeled on Singapore’s Transboundary Haze Pollution Act, which provides legal mechanisms to hold parties accountable for haze-related pollution.
Until stronger regional and legal measures are implemented, public health officials advise individuals to take proactive precautions to minimize exposure to hazardous air. Recommendations for residents in affected areas include sealing homes by keeping windows and doors closed, using air conditioning systems on recirculation mode to limit intake of outdoor air, and employing indoor air purifiers equipped with high-efficiency particulate air (HEPA) filters to reduce indoor particulate matter.
Health experts also emphasize the importance of wearing properly fitted N95 or KF94 masks when outdoors, as standard surgical or cloth masks do not effectively filter fine PM2.5 particles found in haze. Additional measures include staying hydrated and rinsing eyes to alleviate irritation caused by prolonged exposure to polluted air.
The persistence of the haze crisis underscores challenges in balancing environmental stewardship with economic and corporate interests in the region. Until diplomatic and legal frameworks enforce stricter accountability for transboundary pollution, residents must remain vigilant in protecting their own health amid recurring haze episodes.