BANGKOK, Thailand – Thailand’s Pollution Control Department (PCD) has partnered with the Geo-Informatics and Space Technology Development Agency (GISTDA) to use satellite data to identify the source of arsenic contamination in the Salween River.
The PCD’s goal is to use this technology to systematically analyze the river basin, from upstream to downstream, in order to pinpoint the exact origin of the pollution and monitor seasonal changes in the environment and sediment.
This effort is part of a larger plan to develop sustainable, targeted solutions for heavy metal contamination extending across the Kok, Sai, Mekong, and Salween river basins.
PCD Director-General Surin Worakitthamrong stressed that combining satellite technology with ground inspections is essential for understanding the root cause and designing effective remedial measures.
Recent water quality checks conducted by the PCD in early November showed arsenic present in some areas of the Salween, though concentrations were within national safety limits. The highest concentration recorded was 0.01 milligrams per liter (mg/L)
This follows earlier tests in September 2025 that showed higher peaks 0.05 mg/L), with the difference likely attributed to varying water levels and seasonality.
In response to the ongoing concern, Deputy Prime Minister and Minister of Natural Resources and Environment, Suchart Chomklin ordered an urgent sub-committee meeting for November 13 to accelerate efforts to solve the heavy metal contamination across all four major river systems.
This meeting will focus on integrated management, public health protection (including monitoring consumption of aquatic life), and strategies to prevent transboundary water pollution.
The PCD also thanked public stakeholders for their input, stating they remain open to suggestions for a comprehensive and lasting environmental solution. (TNA)
