Department of Disease Control Issues Warning for Mae Sai Residents Regarding Water Contamination
Thai health authorities have advised residents in Mae Sai to avoid using river water due to detected levels of arsenic and heavy metals.
On October 8, 2026, the Thai Department of Disease Control issued a formal health advisory for residents living in the Mae Sai district. According to a report by Matichon Online, authorities have detected the presence of arsenic and other heavy metals within the local river water supply.
As a precautionary measure, the department has strongly urged the public to refrain from using, drinking, or utilizing the river water for food preparation. The presence of these contaminants poses potential health risks, and officials are prioritizing the safety of the local community by discouraging any direct contact with the water until further notice.
For residents and travelers currently in the Mae Sai area, this development is significant as it directly impacts daily water usage and sanitation. It is essential to rely on alternative, verified sources of clean water for consumption and cooking. At this stage, the full extent of the contamination and the specific sources of the heavy metals remain under investigation by environmental and health authorities. Residents are encouraged to monitor official government announcements for updates regarding when the water may be deemed safe for use again. No specific timeline for the resolution of this issue has been provided by the Department of Disease Control at this time.
