Legal Analysis: There are provisions on domestic sewage in the Law of People's Republic of China (PRC) on the Prevention and Control of Water Pollution. It is forbidden to discharge sewage into drinking water sources and water bodies in first-class protected areas. The sewage outlets that have been set up shall be dismantled or treated within a time limit. No new sewage outlets shall be built in the protected areas of drinking water sources, water bodies in scenic spots, important fishery water bodies and other water bodies with special economic and cultural value. When a new sewage outlet is built near the protected area, it is necessary to ensure that the water in the protected area is not polluted.

Legal basis: People's Republic of China (PRC) Water Pollution Prevention Law.

Twenty-first enterprises, institutions and other producers and operators who directly or indirectly discharge industrial wastewater, medical sewage and other wastewater and sewage that can only be discharged after obtaining a sewage discharge permit in accordance with the regulations shall obtain a sewage discharge permit; The operating unit of urban centralized sewage treatment facilities shall also obtain a sewage discharge permit. The pollutant discharge permit shall specify the type, concentration, total amount and discharge destination of the discharged water pollutants. The specific measures for pollutant discharge permit shall be formulated by the State Council. Enterprises, institutions and other producers and operators are prohibited from discharging waste water and sewage specified in the preceding paragraph into water bodies without a sewage discharge permit or in violation of the provisions of the sewage discharge permit.

Article 33 It is forbidden to discharge oil, acid liquor, alkali liquor or highly toxic waste liquid into water bodies. It is forbidden to clean vehicles and containers that have stored oil or toxic pollutants in water.

Article 34 It is prohibited to discharge or dump radioactive solid waste or waste water containing highly radioactive and moderately radioactive substances into water bodies. The discharge of waste water containing low-level radioactive substances into water bodies shall conform to the national regulations and standards for the prevention and control of radioactive pollution.

Article 35 When discharging hot waste water into a water body, measures shall be taken to ensure that the water temperature of the water body meets the water environment quality standards.

Thirty-sixth sewage containing pathogens should be disinfected; It can be discharged only after it meets the relevant national standards.

Article 37 It is forbidden to discharge or dump industrial waste residue, urban garbage and other wastes into water bodies. It is forbidden to discharge, dump or directly bury soluble toxic waste residues containing mercury, cadmium, arsenic, chromium, lead, cyanide and yellow phosphorus into water bodies. Places where soluble toxic waste residue is stored shall adopt waterproof, anti-leakage and anti-loss measures.