Water Pollution Control Measures and Test Reporting Management Regulations Article 96

Sewage systems shall collect wastewater or sewage in the area using dedicated ditches or pipes. However, this is not applicable to the wastewater or sewage of an enterprise that has acquired a surface water body discharge permit or a simple discharge permit document for such wastewater or sewage pursuant Article 20.Sewage systems shall collect rainwater and the runoff wastewater other than that specified in Article 8 in the area using dedicated rainwater ditches or pipes. The ditches or pipes referred to in the preceding sentence shall not be used to collect the wastewater or sewage referred to in the preceding paragraph in a mixed manner.
中文原文 水污染防治措施及檢測申報管理辦法第96條
污水下水道系統應以專用之溝渠或管線,收集區域內之廢(污)水。
但依第二十條規定取得廢(污)水排放地面水體許可證或簡易排放許可文件事業之廢(污)水,不在此限。
污水下水道系統應以專用之雨水溝渠或管線,收集區域內之雨水及第八條以外之逕流廢水。
前述溝渠或管線,不得混雜收集前項之廢(污)水。

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