Construction sites in Bangkok found to be a source of severe air pollution could be ordered to halt work until the problem is resolved, according to Environment Minister Gen Surasak Kanjanarat.
Imposing bans on construction sites and other air-polluters is one of the measures the government hopes will combat air pollution, which is expected to peak between December and April.
Pollution Control Department (PCD) has warned that air pollution in Bangkok and its surroundings will get worse next year due to the expected lengthy cold season and proliferation of around-the-clock large-scale construction work.
Activities that could be halted by the ban include the burning of wood, plastics and rubber if they are deemed to be sources of PM2.5 -- fine dust particles smaller than 2.5 micrometres (0.0025 µm) in diameter that are tiny enough to penetrate human lungs and cause health problems such as asthma, other respiratory problems.
Some studies have also linked PM2.5 with causing adverse health effects on those suffering from heart disease.
"We are concerned about air pollution with a high level of PM2.5 and we have prepared many measures to control the situation, including an order to suspend mega-constructions, like the rail transport projects being built in many parts of the capital. The order will given be if there is a crisis in air quality," Gen Surasak said in a seminar on air pollution on Sunday.
According to the PCD, PM2.5 particles in Bangkok this year between Jan 1 and April 30, exceeded acceptable standards for 36 days, compared with 27 days in 2017.
The highest levels of PM2.5 were found along Intharaphithak Road, as well as in Bang Na and Phaya Thai.
The Ministry of Public Health is also preparing to deal with more cases of respiratory diseases caused by air pollution, according to Danai Teewonda, deputy chief of Department of Health.
The ministry has prepared PM2.5 filtering masks for emergencies and to be distributed to those with heart disease and respiratory ailments.