Arsenic contamination in Chiang Mai’s Kok River sparks testing
The testing of aquatic animals and agricultural produce is underway in Chiang Mai following the arsenic contamination of the Kok River. Police have issued warnings against using the river water for daily consumption and food preparation.
Yesterday, April 29, at Chiang Mai Provincial Hall, deputy governor Siwako Buaphong attended an online meeting with the Senate Committee on Natural Resources and Environment to address the pollution issues affecting the Kok River since March 19. Various government agencies have been actively involved in sampling and analysing water quality at three key locations.
The first testing site is the Thai-Myanmar border, the second is the Friendship Bridge between Mae Nawong and Thaton, and the third is in the Pa Tai village area. Results indicate that the water quality is deteriorating, with heavy metals and toxic substances exceeding safety standards.
Immediate actions have been ordered to identify the pollution sources and alleviate the impact on riverbank communities, particularly in Tha Ton and Na Wang subdistricts.
Local agencies, including community health volunteers, are informing residents, entrepreneurs, and farmers to avoid contact with the river water for consumption and agricultural purposes. The Chiang Mai Provincial Disaster Prevention and Mitigation Office is providing potable water to those affected.
Siwako highlighted concerns over arsenic and heavy metal contamination affecting fisheries, livestock, and agriculture in Mae Ai district. However, investigations show that most locals use mountain water for these activities, mitigating the impact. The tourism sector along the river may face more significant safety concerns.
The Office of Environmental and Pollution Control Region 1 reported on April 24 that sediment samples from the Kok River in Mae Ai district continue to show contamination above acceptable levels. Siwako has instructed the Chiang Mai Fisheries and Agriculture offices to re-examine aquatic life and agricultural produce for toxins such as arsenic, mercury, lead, and cadmium, reported KhaoSod.
To prevent health hazards, officials are stressing the importance of avoiding the use of water from the contaminated areas for cooking and consumption, urging local communities to adhere to the advisories.
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