Pure water refers to pure water that generally uses city tap water as its water source. Through multi-layer filtration, harmful substances such as microorganisms can be removed, but it can also remove minerals such as potassium, calcium, and magnesium required by the human body.

With the rapid development of modern technology and industry, environmental governance is relatively lagging, and the current situation of water pollution is severe. Due to the uncontrolled discharge of industrial wastewater and domestic wastewater and agricultural pollution, the current surface water not only contains mud, sand, and animal and plant decay. There are also a lot of bleaching agents, pesticides, heavy metals, lime, iron and other substances harmful to human health. These pollutants accumulate in the human body for a long time and cause great harm to human health.