(1) free of any toxic, harmful or harmful substances (especially organic pollutants) to the human body;

(2) the water hardness is moderate (EU is 60mg / L);

(3) the human body needs a moderate amount of minerals (mainly to consider the general lack of the population elements);

(4) the pH value should be neutral or weak alkaline (pH value of the ideal pH value of the body fluid and the pH value of 7.35-7.45);

(5) the content of dissolved oxygen and carbon dioxide in water is moderate;

(6) small water molecules (the viscosity of water is low);

(7) the nutritional and physiological functions of water (such as water solubility, penetration, diffusion, emulsification, washing, etc.).

Experts have found that the current market in all the water, only natural mineral water conditions are in line with the healthy drinking water of the seven standards, is the most suitable for people to drink healthy and good water.