Smog rising in North, wind relieves Bangkok

Smog rising in North, wind relieves Bangkok

Chiang Mai province had rain and smog on Monday morning. (Photo: Panumet Tanraksa)
Chiang Mai province had rain and smog on Monday morning. (Photo: Panumet Tanraksa)

Unhealthy levels of fine dust remained high in the northern provinces on Monday, while a southerly wind was easing the pollution in Greater Bangkok.

The Pollution Control Department said levels of PM2.5 ranged from 97 to 225 μg/m³ of air in many northern provinces over the previous 24 hours, as of Monday morning.

Unhealthy PM2.5 levels were reported in Chiang Mai, Chiang Rai, Mae Hong Son, Nan, Phitsanulok and Sukhothai provinces. The worst air was in Mae Hong Son province.

The safe threshold is set by the government at 50 μg/m³, higher than many other countries.

The department blamed the pollution on outdoor burning and stagnant air. It predicted levels would keep rising in the North through to Thursday.

In Greater Bangkok, PM2.5 exceeded the safe threshold only in Bang Khun Thian and Bang Sue district of Bangkok, where fine dust was measured at 51-55μg/m³ of air over 24 hours. Rain and wind relieved the problem.

The Pollution Control Department expected better air quality in Greater Bangkok from Thursday onwards thanks to wind.


  • blame: to be responsible for something bad - เหตุขัดข้อง
  • dust: very small pieces of dirt that cover surfaces inside buildings like a powder - ฝุ่น
  • exceed: to be more than something; to go beyond a limit - เกินกว่าที่กำหนด
  • expect (verb): to think or believe that something will happen or that somebody will do something - คาด, คาดว่า, คาดการณ์
  • fine: made up of very small pieces - ละเอียด
  • predict: to say that an event or action will happen in the future, especially as a result of knowledge or experience - คาดการณ์ว่า พยากรณ์จากสถิติว่า
  • range: to have an upper and a lower limit in amount, number, etc - ผันแปรภายในขอบเขตหนึ่ง
  • relieve: to help improve a bad situation - ผ่อนคลาย, บรรเทา
  • stagnant: (of water or air) not moving and therefore smells unpleasant - นิ่ง, น้ำทรง
  • threshold: the level or point at which you start to experience something, or at which something starts to happen - จุดเริ่มของประสบการณ์หรือเหตุการณ์ใหม่ๆ
  • μg/m³: microgrammes per cubic metre, a measure used for air pollution -
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