A new report from the Stimson Center reveals that Southeast Asia is facing a major environmental crisis, after investigators identified more than 2,400 illegal mines across the region. Many of these sites discharge highly toxic substances — including cyanide, mercury, and arsenic — into major river systems such as the Mekong, Salween, and Irrawaddy.
The impact is already reaching Thailand. Farmers along the Kok River have halted rice cultivation after arsenic contamination was detected, believed to be linked to rare-earth mining operations in Myanmar that reportedly receive support from Chinese entities. Data shows that pollution levels have surged dramatically in just two years.
Stimson describes this as “the first comprehensive study” on mining-related pollution in the region, warning that the crisis threatens over 70 million people and could disrupt global agricultural and fisheries supply chains.
In response, Thailand has set up three emergency task forces to monitor public health, coordinate with neighboring countries, and secure alternative water sources. Meanwhile, communities in Tha Ton continue to demand an immediate halt to upstream mining activities.
Local residents say they simply want “the river to be clean again,” amid fears that if illegal mining continues unchecked, the entire Mekong River basin’s water quality could collapse permanently.
