Bangkok and nearby provinces remained blanketed in smog, with PM2.5 dust exceeding safe levels at 37 air-quality monitoring stations on Saturday morning.
The Pollution Control Department (PCD) said hazardous particle levels in the air in Greater Bangkok ranged between 39 and 79 microgrammes per cubic metre in the morning, with the results in 37 areas exceeding the safety standard of 50 microgrammes per cubic metre.
The unhealthy smog on Saturday worsened in most areas of the capital from Friday, when the levels were 28-55mcg/cm, with fine dust exceeding safe levels.