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Mekong's toxic secret: Arsenic poisons river life
16 Jun
Summary
- Arsenic contamination found in fisherman's body and Mekong river sediment.
- Illegal mining in Myanmar is the suspected source of toxic pollution.
- Pollution threatens millions relying on the Mekong for livelihood and food.

Arsenic contamination is posing a severe threat to the Mekong River and the millions who depend on it. Thai fisherman Somdet Singthong has been found with elevated toxic arsenic levels, a consequence of pollution detected in the river's sediment near Chiang Saen, Thailand. This contamination, exceeding safe levels for aquatic life by over nine times, is now present in the Mekong itself, not just its tributaries.
Experts and activists attribute the pollution to unregulated illegal mining in neighboring Myanmar, exacerbated by the country's ongoing civil conflict. This environmental damage extends downstream, impacting vital rice-growing regions in Vietnam and contaminating fish stocks. The long-term health risks, including cancer and neurological disorders, are a growing concern for vulnerable populations along the river.
Concerns are mounting as communities witness a decline in river life, with fewer children playing in the water and a noticeable absence of wildlife. The situation highlights the convergence of conflict, weak governance, and global demand for resources, leading to the exploitation of natural resources at the expense of environmental integrity and human security.