Ultrafine dust was at unsafe levels in Bangkok and 47 provinces over the past 24 hours, as of Sunday afternoon, according to the Geo-Informatics and Space Technology Development Agency (Gistda).
Gistda reported that unsafe levels of PM2.5, ranged from 38.3 to 60.7 microgrammes per cubic metre (µg/m³) of air in Bangkok and 47 provinces over the past 24 hours, mostly in the Central Plains, the Northeast and the North. The government-set safe threshold for PM2.5 is 37.5µg/m³.
