Picture courtesy of Khoasod.

 

Environmental authorities have issued a warning to residents of Chiang Mai and Chiang Rai following the discovery of dangerously high levels of arsenic in the Kok River, which flows from Myanmar into Thailand. The contamination, which is believed to be linked to gold mining activities upstream in Myanmar’s Shan State, has prompted health advisories for local communities.

 

Dr. Amphon Benjapolpitak, Director-General of the Department of Health, confirmed that tests in the Mae Ai District of Chiang Mai revealed arsenic levels of 0.026 mg/L, well above the legal safety limit of 0.01 mg/L. The river also showed elevated levels of lead, with readings of 0.076 mg/L, surpassing the acceptable limit of 0.05 mg/L. 

 

 

This contamination poses serious health risks, including skin rashes, nausea, vomiting, and long-term effects such as skin cancer and nerve system disorders.

 

Dr. Nithirat Boontanon, Director of Health Centre 1 in Chiang Mai, advised residents in the affected areas, including districts in Chiang Rai such as Mueang, Wiang Chai, Wiang Chiang Rung, Mae Chan, Doi Luang, and Chiang Saen, to avoid swimming in or using the river water for drinking, cooking, or washing. He recommended using treated tap water for all domestic needs.

 

The contamination is believed to have originated from gold mining activities near the river’s source in Myanmar. Local sources reported that mining operations, authorised by the United Wa State Army, have resulted in the discharge of contaminated water into the Kok River, leading to visible turbidity and arsenic levels far above safe standards. The mining activities involve widespread earth disturbance, releasing harmful chemicals into the waterway.

 

Environmental experts have urged further monitoring of the river, particularly regarding the potential for mercury contamination in aquatic life. They also called for immediate testing of river fish and sediment for other hazardous substances. While cyanide, commonly used in gold mining, was not detected, authorities have stressed the importance of continued vigilance.

 

Health officials have reported cases of local residents experiencing symptoms consistent with arsenic poisoning, including skin irritation and gastrointestinal distress. Authorities are working to communicate the risks to affected communities and are advising those who feel unwell to seek medical attention promptly.

 

The situation highlights the growing concerns over transboundary pollution in Southeast Asia, with calls for stronger governmental action and international cooperation to address cross-border environmental issues.

 

-- 2025-04-06

 

From a Chinese factory?

1 hour ago, JimHuaHin said:

From a Chinese factory?

 

No - from the Chinese who are operating the gold mines.

I think that the article was in the BP yesterday (or Friday).

Today's article in the BP is the same as this one.

Unfortunately, the people of Burma, the United Wa State Army in this case, fighting the illegal military are short of money and weapons, so they let anyone with cash do what they will.