Bangkok and 57 provinces of Thailand were shrouded with unsafe levels of ultrafine dust, with seriously harmful red levels in the capital and 15 provinces, on Monday morning. Orange levels (starting to harm health) of PM2.5 were recorded in 42 provinces, ranging from 38.5 to 73.4µg/m³. Ten provinces had moderate air quality with PM2.5 levels from 25.8 to 37.2µg/m³. In descending order, they were Amnat Charoen, Nakhon Phanom, Sukhothai, Phrae, Nan, Lampang, Phayao, Satun, Phangnga and Surat Thani. Two southern provinces, Ranong and Chumphon, had very good air quality with PM2.5 levels of just 11.4 and 10.6µg/m³ respectively.

Source: Bangkok Post January 26, 2026 04:49 UTC