
Ultra-fine dust pollution reached unsafe levels in Bangkok and 36 provinces including one designated red (seriously harmful) on Thursday morning.
The Geo-Informatics and Space Technology Development Agency (Gistda) reported at 7am that PM2.5 levels ranged from 37.6 to 78.7 microgrammes per cubic metre (µg/m³) in the affected areas. The safe threshold for PM2.5 set by the Thai government is 37.5µg/m³.