You cannot bathe in gray water.
Reclaimed water generally refers to recycled water. Reclaimed water refers to water that has been properly treated, such as wastewater or rainwater, reaches certain water quality indicators, meets certain usage requirements, and can be used beneficially. In urban construction, water supply is called "upper water" and sewage discharge is called "lower water", so gray water means something in between. The quality of gray water is between that of sewage and tap water. It is non-drinking water that has been purified and treated to meet national standards and can be used within a certain range. It can be used in many aspects of urban landscape and people's lives. The "human contact" defined in landscape water and hydrophilic water utilization refers to immersion of hands and feet in small streams and partial body contact, rather than systemic contact such as bathing. Use of reclaimed water for bathing will cause damage and irritation to the skin.
The name "reclaimed water" comes from Japan. There are many interpretations of the definition of "reclaimed water". It is called "reclaimed water" in sewage engineering and "recycled water" in factories. Water quality is generally used as a mark of distinction. . It mainly refers to non-potable water that can be reused within a certain range after urban sewage or domestic sewage has been treated to meet certain water quality standards. The water after urban sewage has been deeply purified by treatment facilities is collectively called "reclaimed water", and the utilization of reclaimed water is also called sewage reuse. In the United States, Japan, Israel and other countries, a large amount of gray water is used for toilet flushing, garden and farmland irrigation, road cleaning, car washing, urban fountains, cooling equipment replenishment water, etc. From an economic point of view, the cost of recycled water is the lowest. From an environmental point of view, sewage recycling can help improve the ecological environment and achieve a virtuous cycle of water ecology.