Drinking Water Management Act Article 15-1

For circumstances in which the use of a water body as a drinking water source or for drinking water is prohibited pursuant to Article 21 or Article 24, once the water intake organization or water supplier addresses the reason for placing a prohibition on the water body, a non-subordinate environmental analysis laboratory that has received a permit from the central competent authority shall carry out sampling of the water body that originally failed to meet water quality standards. The water body may resume serving as a drinking water source or as drinking water after the sample has been sent for testing and an environmental analysis report showing adherence to standards has been submitted to and approved by the organization that handles the review of the matter.
中文原文 飲用水管理條例第15-1條
依第二十一條或第二十四條規定,經禁止作為飲用水水源或供飲用者,該取水或供水單位於原因消失後,應由非其所屬且取得中央主管機關核發許可證之環境檢驗測定機構,對於水質不合格項目辦理採樣,並以同一水樣送檢後,檢具符合標準之檢驗測定報告,報處分機關核准後,始得恢復作為飲用水水源或供飲用。

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