On May 26, 2025, Dr. Suebsakul Kitnugul, a lecturer at the School of Social Innovation, Mae Fah Luang University, along with a scientific research team from the university's laboratory, collected water samples from the Sai River at Hua Fai Community, Ban Tham Pha Jom, Wiang Phang Kham Subdistrict, Mae Sai District, Chiang Rai. This location marks the first entry point of the river into Thailand from Myanmar.
The sampling aimed to test for heavy metal contamination, particularly arsenic and lead, to determine whether levels exceed safety standards. A previous sample collected on May 1 revealed arsenic and lead levels above the standard limits. The new samples will be tested again in the university’s laboratory to assess any changes in contamination levels, especially after recent flooding in Mae Sai, and to detect any other heavy metals present.
Dr. Suebsakul explained that the follow-up testing will help determine if the contamination has intensified or diminished following the flood event. All tests will be conducted under controlled scientific procedures.
Meanwhile, the Department of Disaster Prevention and Mitigation (DDPM) reported that the Sai River’s water level at the Jotada Station in Myanmar is rising steadily, currently measured at 513.61 meters above mean sea level. There is a risk of the river overflowing, prompting authorities to warn residents in high-risk areas and prepare for potential flooding.