From water quality measurements by the Research, Development and Hydrology Division, Office of Water Management and Quality Development, Department of Water Resources, arsenic levels were found to exceed standards at several times from mid-2024 to early 2025 in the Kok River, Chiang Rai Province, during July and September 2024, and in the Chiang Saen District (Mekong River) in August and December 2024, as well as during January-March 2025.
credit : สล็อต