Chiang Mai had the worst air quality in the world on Sunday, with forest fires in several districts and neighbouring Myanmar, according to the IQAir app.
According to the Geo-Informatics Space Technology and Development Agency (GISTDA), 1,474 hotspots were detected throughout Thailand yesterday, with 7,134 in Myanmar, 1,047 in Laos, 254 in Cambodia, 220 in Vietnam and 6 in Malaysia.
Chiang Mai was choked by PM2.5 dust, measured at 85µg/m³ yesterday, as forest fires were reported in several districts, such as Ban Santisook in Doi Tao.
The Pollution Control Department reported that PM2.5 exceeded the safe level in every northern province today, with 143µg/m³.
In Umphang district of Tak province, one man was arrested for making charcoal in protected forest.
