Unsafe levels of ultrafine dust have been recorded across much of Thailand, including Bangkok, prompting health advisories for the public. Geo-Informatics and Space Technology Development Agency (Gistda) reported on Sunday that 47 provinces are currently experiencing poor air quality, with conditions expected to continue for several days.
According to the 3pm report from Gistda, concentrations of fine particulate matter (PM2.5) exceeded the government's safe threshold of 37.5 micrograms per cubic metre (µg/m³). The affected regions, primarily in the Central Plains, Northeast, and North, recorded PM2.5 levels ranging from 38.3 to 60.7 µg/m³. The highest level was observed in Nong Khai province in the Northeast. In Bangkok, all 50 districts reported unsafe air quality, with an average concentration of 49.1 µg/m³.
This rise in air pollution is linked to a combination of factors, including the end of the harvest season, which often leads to an increase in agricultural burning. Unfavorable weather patterns, such as a high-pressure system from China, are trapping the dust particles and preventing them from dispersing. These fine particles are a significant health concern as they can penetrate deep into the lungs and enter the bloodstream, leading to respiratory and cardiovascular problems.
Narong Ruangsri, the permanent secretary of the Bangkok Metropolitan Administration, has advised the public to take precautions. "I recommend that people wear face masks when outdoors and for those with health conditions to stay indoors if possible," he stated. He added that air quality is expected to remain poor until Tuesday but may start to improve from Wednesday as weather patterns shift.
While many central and northern provinces are affected, several southern provinces, including Phuket, Krabi, and Songkhla, continue to enjoy good air quality. Authorities are monitoring the situation closely and have asked for public cooperation to reduce pollution sources, such as vehicle emissions and outdoor burning, to help mitigate the health risks.
About Geo-Informatics and Space Technology Development Agency (Gistda)
Gistda is a public organization under Thailand's Ministry of Higher Education, Science, Research and Innovation. It is responsible for developing and applying space technology and geo-informatics to serve the needs of the country and the general public. Gistda plays a crucial role in monitoring environmental conditions, including air quality, and providing vital information for public safety and national development. For more information, visit Gistda's website.
