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私人水井為何需要消毒?
如果懷疑井水已被污染,應當怎麼辦?
怎樣化驗井水?
如果井水化驗結果證明其“不合格”,應當怎麼辦?
怎樣對鑽出或挖出的水井進行消毒?
怎樣對鑽出的水井消毒?
(**) 1盎司=2湯匙顆粒