船舶生活污水管理：灰水管控与法律缺失

In addition, in terms of other file regulations, the 'Technical Policy for Ship Water Pollution Prevention and Control' classifies domestic sewage into black water and grey water. Grey water includes wastewater from dishwashing, kitchen sinks, showers, laundry, bathing tubs, and hand basins, excluding wastewater from cargo areas. It also requires the gradual implementation of grey water control and the adoption of control measures such as collecting and storing domestic sewage on board in corresponding devices and closing drainage valves in water areas where domestic sewage is not allowed to be discharged, such as drinking water sources protection zones, to prevent domestic sewage from entering the environment water bodies. Furthermore, it stipulates that records should be kept for relevant control measures. However, this document is only a guiding document and lacks legal enforceability.