Drinking Water Management Act Article 6

Only water bodies designated in each subparagraph of Article 3, Paragraph 2 that meet water quality standards for drinking water sources may serve as drinking water sources. However, drinking water sources or water treatment and improvement plans submitted to the central competent authority for approval shall not be subject to this restriction. The central competent authority shall determine regulations governing criteria for proposing improvement plans, content of the plans, documentation that shall be attached, procedures, monitoring, response measures, approval conditions, rejection, corrections, and other binding matters.The central competent authority shall determine the water quality standards for drinking water sources mentioned in the preceding paragraph.
中文原文 飲用水管理條例第6條
第三條第二項各款所定水體符合飲用水水源水質標準者,始得作為飲用水之水源。
但提出飲用水水源水質或淨水處理改善計畫,向中央主管機關申請核准者,不在此限;其申請提出改善計畫之資格、計畫內容、應檢附之書件、程序、監測、應變措施、核准條件、駁回、補正及其他應遵行事項之準則,由中央主管機關定之。
前項飲用水水源水質標準,由中央主管機關定之。

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