Arsenic found in wells exceeding standards, Mae Sai villagers pump water to use, wash their houses from floodwater mud, feel itchy, rash all over their bodies, while tap water can still be used.
On 29 May 2025, Asst. Prof. Dr. Surapol Voraphattrathorn, Head of the Artificial Intelligence and Startup Technology Research Center, Mae Fah Luang University, went to collect water samples from the Sai River สล็อต