Arsenic in Sai River cuts tap water in 14 Chiang Rai villages
Tap water to 14 villages in Mae Sai and Wiang Phang Kham subdistricts of Chiang Rai fell to 60% of normal supply after arsenic above the standard and extreme turbidity were found in raw water from the Sai River. The Provincial Waterworks Authority cut output on 5 November 2026, and the governor said supply had recovered to about 80%.
What this means for you
- Residents of 14 villages in Mae Sai and Wiang Phang Kham subdistricts, including foreigners living there, had tap water cut to 60% of normal supply.
- Supply had recovered to about 80% as of the governor's statement, with no full restoration date given.
Source
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