The uncirculated air mass in Bangkok has caused airborne particulate matter to exceed the standard level, mostly due to air pollution in the roads.
Pollution Control Department (PCD) Director-General Sunee Piyapanpong said Bangkok’s uncirculated air mass and near-surface atmosphere have caused the accumulated air pollution and the airborne particulate matter (PM2.5) to exceed the standard level at more than 50 micrograms per cubic meter of air.
The pollution is caused mainly by heavy road traffic, followed by industrial factories and open-air combustions. Such adverse condition is intensified by still air with no wind in the near-surface atmosphere only to accumulate the degree of the polluted air. The phenomenon is considered common as the current season is changing from winter to summer.
However, she said Bangkok’s air quality might merely fall into the orange one, not the red zone.
Those who may have respiratory problems are advised to refrain from staying outdoors, while motorists are encouraged to keep their vehicles’ engine in good condition to reduce toxic emission, and to use public transports to alleviate the unfavorable situation.