Laos tells three villages to stop using river water after mine-waste spill
The chemicals have not been identified, and the river flows on toward Vietnam.
Thursday 5 November · 06:01 · 1 min read
In 30 seconds
- Two waste-storage ponds at rare-earth mining sites reportedly broke on November 1, sending chemical waste into the Nam Waen River. [1]
- A November 3 notice told residents of Muang Waen, Nakao and Nakhone villages to stop using river water until checks are complete. [1]
- As of November 4, authorities had not identified the chemicals or determined why the ponds failed. [1]
What happened
Authorities in Laos advised people in three villages in Houaphanh province to stop using river water temporarily after two waste-storage ponds at rare-earth mining sites broke on November 1. Chemical waste entered the Nam Waen River, according to the report. The restriction was announced on November 3 and was to remain until authorities finished testing and issued further notice. As of November 4, officials had not identified the chemicals or the cause of the pond failures.
Why it matters
Residents of the three villages have been told not to use the river while checks continue. The report says the Nam Waen flows into the Nam Sam and then across into Vietnam; it does not report an effect in Cambodia.
Background
The report says residents in Houaphanh reported chemical pollution in 2024 and claimed it killed fish and livestock and affected livelihoods in 36 villages. On October 6, 2026, a provincial legislator called for a review of mining projects and a pause on approving new ones.
Key terms
- Rare earth
- A group of minerals used in some industrial and technology products.
- Waste-storage pond
- A basin used to hold waste from an industrial or mining operation.
Timeline
- November 1, 2026 Two mine-waste storage ponds broke, and chemical waste entered the Nam Waen River.
- November 3, 2026 Authorities told residents in three villages to stop using river water temporarily.
- November 4, 2026 Authorities had not yet identified the chemicals or the reason the ponds broke.
Sources (1)
[1] Kohsantepheap Daily ឡាវប្រកាសឱ្យប្រជាពលរដ្ឋផ្អាកប្រើទឹកទន្លេ ក្រោយទឹកសំណល់គីមីហូរចូល 4 Nov Read originalWas this explainer clear?
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