Meanwhile, 4,056 hotspots were seen on Cambodian soil, 979 in Myanmar, 622 in Laos and 166 in Vietnam.
Thailand and Cambodia have agreed in principle to jointly fight forest fires and reduce transborder PM2.5 ultrafine pollutants in the air.
The GISTDA said as of 8am on Sunday, 30 provinces in Thailand were found to have PM2.5 pollution readings that went beyond safe levels. Air pollution in most of Bangkok was at a moderate level, though readings in Don Mueang, Lak Si, Nong Khaem, Thawee Wattana, Bang Bon, Phra Khanong and Bangkok Yai crossed the safe level.
