中华人民共和国水污染防治法（2018年1月1日施行）第四十五条

排放工业废水的企业应当采取有效措施，收集和处理产生的全部废水，防止污染环境。含有毒有害水污染物的工业废水应当分类收集和处理，不得稀释排放。

向污水集中处理设施排放工业废水的，应当按照国家有关规定进行预处理，达到集中处理设施处理工艺要求后方可排放。

Water Pollution Prevention and Control Law of the People's Republic of China (effective since January 1, 2018), Article 45

Enterprises that discharge industrial wastewater should take effective measures to collect and treat all the wastewater generated to prevent environmental pollution. Industrial wastewater containing toxic and harmful water pollutants shall be collected and treated in a classified manner, and shall not be diluted for discharge.

Industrial wastewater discharged into centralized sewage treatment facilities shall undergo pretreatment in accordance with relevant national regulations, and can only be discharged after meeting the treatment process requirements of the centralized treatment facilities.