Authorities investigating elevated levels of arsenic

Authorities in Chiang Rai province, northern Thailand, are urgently investigating elevated levels of arsenic detected in the Sai, Ruak, and Mekong rivers. Preliminary tests conducted at nine locations last month revealed arsenic concentrations exceeding safety standards by up to 19 times in some samples.

Further testing is being carried out in a laboratory to confirm these initial findings. Separately, concerns have been raised about potential water contamination from upstream mining activities affecting the Kok River. The Living River Association is collaborating with academic institutions and the Chiang Rai Fisheries Department to monitor the health of aquatic life in the affected rivers.