Ultra-fine PM2.5 dust particles in the air exceeded the so-called safe level in three districts of Bangkok on Thursday, prompting concerns over a possible recurrence of hazardous smog in the capital.
Bang Phlat, Bang Khen and Bang Sue districts reported 60, 51 and 51 microgrammes per cubic metres (cu/m) of the dust particle respectively as of 8am on Thursday, according to a daily air-quality report by the Bangkok Metropolitan Administration's (BMA) environment office.
The "safe" level in Thailand of the PM2.5 dust is no more than 50 microgrammes per cu/m.
The overall air quality in most parts of the city, however, was still rated as being between moderate to very good, said the same report.
Nevertheless, the high levels of ultra-fine dust in these three districts may pose a threat to the health of people living in these areas, said the report.
Chatri Watthanakhachon, director of the BMA's environment office, played down fears over a possible recurrence of hazardous dust particles across the city, saying the particle levels in these districts may not be high all day long or every day.
Meanwhile, the Public Health Ministry has distributed more face masks to three schools in the southern province of Trang where the PM 2.5 level was measured at 168 microgrammes per cu/m on Thursday.
The province is being hit by toxic haze blamed on forest fires in Indonesia.
Learn from listening
Click "play" to listen to 3 districts of capital hit by toxic smog and "Download" to keep this file for educational purpose.
dust : very small pieces of dirt that cover surfaces inside buildings like a powder - ฝุ่น
hazardous : dangerous, especially to people’s health or safety - ที่เป็นอันตราย
haze : water, smoke or dust in the air that makes it difficult to see clearly - หมอกควัน
mask : something that you wear to cover part or all of your face in order to hide who you are, for protection or for decoration - หน้ากาก, เครื่องปิดหน้า
moderate : neither very great nor very small in strength, size, amount or degree - ระดับปานกลาง
particle : an extremely small piece or amount of something - ฝุ่นละอองขนาดเล็ก
played down : made something seem less important than it is - ลดความสำคัญของ
PM2.5 (n): atmospheric particulate matter (PM) with a diameter of less than 2.5 micrometres, which is about 3% the diameter of a human hair. It can lodge in the lungs and enter blood vessels, leading to respiratory and cardiovascular disease -
toxic : poisonous and harmful to people, animals or the environment - เป็นพิษ