
Ultrafine dust levels were in the red (hazardous-to-health) in 44 out of Thailand's 77 provinces on Thursday morning, with only six provinces reporting moderate to good air quality.
The Geo-Informatics and Space Technology Development Agency (Gistda) reported at 8am that PM2.5 was at red levels in 44 provinces and at orange (starting to affect health) levels in 27 provinces.