Drinking Water Quality Standards Article 4

For tap water, simple water supply and treatment facilities, and community-installed public water supply systems, when source water turbidity value exceeds 1,500 NTU caused by torrential rains or other natural disasters, the maximum turbidity limit for drinking water may apply to 4 NTU.Drinking water source turbidity testing data in the foregoing paragraph shall be provided by tap water enterprises, simple water supply and treatment units or community-installed public water supply units.
中文原文 飲用水水質標準第4條
自來水、簡易自來水、社區自設公共給水因暴雨或其他天然災害致飲用水水源濁度超過一五○○NTU時,其飲用水水質濁度最大限值為四NTU。
前項飲用水水源濁度檢測數據,由自來水事業、簡易自來水管理單位或社區自設公共給水管理單位提供。

English translation for reference only; the Chinese text prevails. Not legal advice.