Levels of ultra-fine dust, known as PM2.5, have been either moderate or unhealthy in recent days in some areas of Bangkok and several other provinces, according to the Ministry of Public Health. People, particularly those with chronic diseases, are advised to check the air quality before leaving their homes or engaging in outdoor activities, the ministry advises. According to the air quality website of the Pollution Control Department, PM2.5 levels in certain provinces — particularly in the Northeast such as Nakhon Phanom, Mukdahan, Yasothon, Nong Khai and Ubon Ratchathani — are now at the moderate (yellow) level or unhealthy (orange) level. Dr Opas said that before leaving their homes or participating in outdoor activities, people should check PM2.5 levels using the Air4Thai mobile application or visit the Pollution Control Department’s Air4Thai website. They can also visit https://pm25gistda.or.th to assess air quality levels:
