Water Pollution Control Measures and Test Reporting Management Regulations Article 89

The quality and volume of water that an enterprise or sewage system reports shall be acquired by sampling and measuring on the same day. However, this is not applicable to the quality and volume of runoff wastewater.
中文原文 水污染防治措施及檢測申報管理辦法第89條
事業或污水下水道系統申報之水質、水量,應於同一日採樣及量測。
但逕流廢水之水質、水量,不在此限。

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