Bangkok recorded the worst air quality in Thailand on Tuesday morning, with ultra-fine dust levels reaching hazardous “red” levels. At 10 a.m., the Geo-Informatics and Space Technology Development Agency (Gistda) reported that particulate matter (PM2.5) in the capital hit 88.6 µg/m³ over 24 hours, far exceeding the government’s safe threshold of 37.5 µg/m³.
This dangerous level of PM2.5 affected all 50 districts in Bangkok, with the highest reading of 96.7 µg/m³ measured in Bang Kho Laem district. The surrounding provinces of Nonthaburi, Samut Prakan, Samut Sakhon, and Pathum Thani also experienced red levels, with PM2.5 levels between 79.1 µg/m³ and 83.6 µg/m³.
In contrast, 16 other provinces, including Krabi, reported safe air quality with PM2.5 levels ranging from 24 µg/m³ to 37.3 µg/m³. Provinces like Chiang Mai, Chumphon, and Phuket saw lower pollution, making the air breathable.
Meanwhile, 15 other provinces in the south faced moderate pollution with PM2.5 readings between 37.7 µg/m³ and 74.8 µg/m³, which can start to impact health.
