Arsenic, lead in Kok River causes alarm

Chiang Mai and Chiang Rai people have been warned after higher lead and arsenic substances were found in the Kok River.
Government issued a public notice to prevent using the dark waters, citing the potential health risks posed by the impurities which exceeded security requirements.
Aweera Pakamat, chairman of the Chiang Mai Environmental and Pollution Control Office, said on Saturday the Kok River, which flows from Myanmar into Mae Ai, has distinct water during the dry season. But, last month the water turned exceedingly hazy, with information emerging of people developing blisters after swimming.
The company took tests from the valley at three different locations for testing on March 19 and found the haze levels at three checking points were nearly 10 times higher than the acceptable standard.
” Our checks also found lead and arsenic levels considerably above security levels. Extended exposure to these toxins, especially lead, can increase the risk of malignancy”, he said.
Regulators advised people not to drink or use the river waters. If the ocean is to be diverted for women’s use, it should be properly tested in cooperation with the local water power.
Concerns have also been raised about the ocean quality of the Kok River in neighbouring Chiang Rai.
The river’s appearance has turned dark, and some locals suspect silver mining activities inland in Myanmar could be the trigger.
Local officials began collecting samples for testing on March 24, with results expected in the coming weeks, said a cause.
Dr Waranyu Chamnongprasatporn, the chief of the Chiang Mai Provincial Public Health Office, said lead exposure could cause various symptoms, including headaches, fatigue, and severe stomach pain. Arsenic poisoning, meanwhile, may lead to skin rashes, nausea, and diarrhoea.
He warned particularly vulnerable groups, including children and pregnant women, to avoid contact with the water.
The public, he said, should boil or filter the water before use. The provincial health office will keep monitoring the situation and provide medical assistance to those affected.