{"id":45225,"date":"2026-02-25T09:35:13","date_gmt":"2026-02-25T02:35:13","guid":{"rendered":"https:\/\/transbordernews.in.th\/home\/?p=45225"},"modified":"2026-02-25T12:02:10","modified_gmt":"2026-02-25T05:02:10","slug":"arsenic-found-in-residents-along-kok-river-academics-warn-of-rising-health-risks","status":"publish","type":"post","link":"https:\/\/transbordernews.in.th\/home\/?p=45225","title":{"rendered":"Arsenic found in residents along Kok River; academics warn of rising health risks"},"content":{"rendered":"\n<p><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/transbordernews.in.th\/home\/wp-content\/uploads\/DP-2026-02-25T115253.473.png\"><img fetchpriority=\"high\" decoding=\"async\" width=\"900\" height=\"900\" src=\"https:\/\/transbordernews.in.th\/home\/wp-content\/uploads\/DP-2026-02-25T115253.473.png\" alt=\"\" class=\"wp-image-45232\" srcset=\"https:\/\/transbordernews.in.th\/home\/wp-content\/uploads\/DP-2026-02-25T115253.473.png 900w, https:\/\/transbordernews.in.th\/home\/wp-content\/uploads\/DP-2026-02-25T115253.473-300x300.png 300w, https:\/\/transbordernews.in.th\/home\/wp-content\/uploads\/DP-2026-02-25T115253.473-150x150.png 150w, https:\/\/transbordernews.in.th\/home\/wp-content\/uploads\/DP-2026-02-25T115253.473-768x768.png 768w, https:\/\/transbordernews.in.th\/home\/wp-content\/uploads\/DP-2026-02-25T115253.473-465x465.png 465w, https:\/\/transbordernews.in.th\/home\/wp-content\/uploads\/DP-2026-02-25T115253.473-500x500.png 500w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/a><\/figure>\n<\/div>\n\n\n<p>CHIANG RAI: Arsenic has been detected in the bodies of residents living along the Kok River, raising concerns of long-term health impacts if the situation is left unaddressed, academics said at a policy dialogue on Tuesday.<\/p>\n\n\n\n<!--more-->\n\n\n\n<p>The findings were presented on February 24, 2026 at a meeting in Chiang Rai, aimed at developing community-driven policy proposals in response to toxic contamination in the Kok River. Researchers from Mae Fah Luang University (MFU) reported arsenic accumulation in human samples collected from four locations: Ban Tha Ton in Chiang Mai\u2019s Mae Ai district, and three sites in Chiang Rai \u2014 Doi Hang (Mae Yao), Dong Mahawan (Wiang Chiang Rung), and Ban Saeo (Chiang Saen).<\/p>\n\n\n\n<p>Dr Siriwan Kantisin, a lecturer in occupational health and safety at MFU\u2019s School of Health Science, said arsenic was found in fingernail samples from adults and hair samples from children in all surveyed areas, indicating exposure and accumulation in the body.<\/p>\n\n\n\n<p>According to data presented at the meeting, 16 out of 90 samples \u2014 or 17.78% \u2014 showed arsenic levels in fingernails exceeding the standard threshold of 0.5 mg\/kg. Among those with elevated levels, clinical symptoms were observed, including numbness and muscle weakness in the extremities (62.5%), skin irritation (43.8%), abnormal skin pigmentation or thickened lesions resembling corns (31.1%), respiratory issues such as nasal inflammation and septal perforation (18.8%), as well as swelling of both feet (18.8%) and reduced urine output (12.5%).<\/p>\n\n\n\n<p>Assoc Prof Satien Chanta of Chiang Rai Rajabhat University said the presence of arsenic in nails and hair indicates that the body is unable to fully eliminate the toxin, signalling ongoing accumulation. However, Thailand currently lacks clear benchmarks for what constitutes dangerous levels of arsenic in the human body, he said, suggesting that international standards, such as those of the World Health Organization, may need to be referenced.<\/p>\n\n\n\n<p>\u201cThis research should help drive policy. The key question is how the government will respond to at-risk populations,\u201d he said. \u201cAuthorities must urgently conduct further testing, confirm the findings, and develop concrete measures to manage the health risks.\u201d<\/p>\n\n\n\n<p>He added that the Public Health Ministry and the Interior Ministry must work in an integrated manner, stressing that the issue is urgent as previous testing by the Department of Disease Control had already found arsenic in the urine of riverside residents.<\/p>\n\n\n\n<p>Assoc Prof Satien also called on the government to consolidate available data and communicate risks clearly to affected communities, noting that most residents are unlikely to relocate and must instead be equipped with the knowledge to live safely under current conditions.<\/p>\n\n\n\n<p>Over the past year, he said, public awareness of heavy metal contamination in the Kok, Sai, Ruak and Mekong rivers has outpaced government action. \u201cState agencies face limitations in addressing the issue. At the local level, we have yet to see concrete measures in agriculture, tourism or fisheries, while at the national level there is still no dedicated task force translating field data into policy and practice,\u201d he said.<\/p>\n\n\n\n<p>He also noted a lack of progress in both bilateral and multilateral efforts to address transboundary pollution (from mining in Myanmar). While Thailand and Myanmar have agreed to conduct joint water testing, differences in arsenic standards remain unresolved. No significant advancement has been seen in regional frameworks such as the Mekong River Commission or Lancang-Mekong Cooperation mechanism, he added.<\/p>\n\n\n\n<p>Somporn Pengkham, director of the Health Impact Assessment Platform, said the findings \u2014 particularly arsenic levels in nails exceeding standard thresholds \u2014 indicate early stages of accumulation that could lead to increased cases of arsenic poisoning if exposure is not reduced.<\/p>\n\n\n\n<p>She identified water and food \u2014 especially rice grown in contaminated irrigation systems \u2014 as the primary pathways through which arsenic enters the human body.<\/p>\n\n\n\n<p>To strengthen prevention, she proposed designating arsenic poisoning as a \u201cnotifiable disease under surveillance\u201d under the Occupational and Environmental Disease Act, enabling local authorities and communities to establish monitoring systems, tailor preventive measures to specific risks, and ensure timely reporting and treatment of suspected cases.<\/p>\n\n\n\n<p>She also called for capacity building among village water supply committees to improve understanding of arsenic and heavy metal treatment systems, including field testing of raw and treated water, sample collection, and interpretation of laboratory results. Under Thailand\u2019s Public Health Act, local administrative organisations are responsible for managing community water systems.<\/p>\n\n\n\n<p>\u201cEnvironmental health literacy must be urgently strengthened among local officials, health service providers and communities,\u201d she said, adding that communities should be supported with tools and technology to conduct preliminary risk assessments, collect samples and access timely screening and healthcare services.<\/p>\n\n\n\n<p>Dr.Suebsakun Kitnukorn, an academic at MFU, raised concerns over recent statements by the Pollution Control Department (PCD) claiming that toxin levels in the Kok River were within safe limits.<\/p>\n\n\n\n<p>He pointed to inconsistencies in testing practices, noting that the PCD typically advises that field test kits must be used alongside laboratory analysis, yet recent public statements appeared to rely solely on test kit results.<\/p>\n\n\n\n<p>He also questioned the limited number of sampling sites and whether other rivers \u2014 including the Sai, Ruak and Mekong \u2014 had been adequately tested. Previous PCD monitoring conducted between Jan 13\u201316 had already found arsenic levels exceeding standards at key locations along the Kok River, including Tha Ton Bridge and Mae Na Wang Bridge, he said.<\/p>\n\n\n\n<p>Dr.Suebsakun further criticised public guidance that encouraged recreational water activities, warning that such actions could stir up contaminated sediment and increase exposure risks. Conflicting advice on fish consumption \u2014 such as avoiding fish heads or liver \u2014 has also added to public confusion, he said.<\/p>\n\n\n\n<p>He called for a formal multi-stakeholder consultation involving the PCD, Chiang Rai authorities, academics, civil society and business operators to develop a coordinated response.<\/p>\n\n\n\n<p>\u201cWe need a joint decision-making process to find a way forward,\u201d he said.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>&#8212;-<\/p>\n\n\n\n<p>This is a translation of original Thai news article https:\/\/transbordernews.in.th\/home\/?p=45220<br>transbordernews.in.th<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CHIANG RAI: Arsenic has been detected in the bodie<span class=\"more-link\"><a href=\"https:\/\/transbordernews.in.th\/home\/?p=45225\">Read More &rarr;<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":45232,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[258],"tags":[],"class_list":["entry","author-admin","has-more-link","post-45225","post","type-post","status-publish","format-standard","has-post-thumbnail","category-english-articles"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u0e2a\u0e33\u0e19\u0e31\u0e01\u0e02\u0e48\u0e32\u0e27\u0e0a\u0e32\u0e22\u0e02\u0e2d\u0e1a<\/title>\n<meta name=\"description\" content=\"\u0e02\u0e48\u0e32\u0e27\u0e2a\u0e30\u0e17\u0e49\u0e2d\u0e19\u0e2a\u0e31\u0e07\u0e04\u0e21\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/transbordernews.in.th\/home\/?p=45225\" \/>\n<meta property=\"og:locale\" content=\"th_TH\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u0e2a\u0e33\u0e19\u0e31\u0e01\u0e02\u0e48\u0e32\u0e27\u0e0a\u0e32\u0e22\u0e02\u0e2d\u0e1a\" \/>\n<meta property=\"og:description\" content=\"\u0e02\u0e48\u0e32\u0e27\u0e2a\u0e30\u0e17\u0e49\u0e2d\u0e19\u0e2a\u0e31\u0e07\u0e04\u0e21\" \/>\n<meta property=\"og:url\" content=\"https:\/\/transbordernews.in.th\/home\/?p=45225\" \/>\n<meta property=\"og:site_name\" content=\"\u0e2a\u0e33\u0e19\u0e31\u0e01\u0e02\u0e48\u0e32\u0e27\u0e0a\u0e32\u0e22\u0e02\u0e2d\u0e1a : Transborder News\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/newstransborder\" \/>\n<meta property=\"article:published_time\" content=\"2026-02-25T02:35:13+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-25T05:02:10+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/transbordernews.in.th\/home\/wp-content\/uploads\/DP-2026-02-25T115253.473.png\" \/>\n\t<meta property=\"og:image:width\" content=\"900\" \/>\n\t<meta property=\"og:image:height\" content=\"900\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@khaochaikhob\" \/>\n<meta name=\"twitter:site\" content=\"@khaochaikhob\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 \u0e19\u0e32\u0e17\u0e35\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/transbordernews.in.th\\\/home\\\/?p=45225#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/transbordernews.in.th\\\/home\\\/?p=45225\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\\\/\\\/transbordernews.in.th\\\/home\\\/#\\\/schema\\\/person\\\/0fe79b3ac057f9d9e37fd8487e391a08\"},\"headline\":\"Arsenic found in residents along Kok River; 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