1, does not contain toxic, harmful or odorous substances.
2. The hardness of water is moderate (calculated by calcium carbonate: 50-200mg/L).
3. The proportion of minerals and trace elements in water is similar to that in human body fluids (including calcium content >; = 8 mg/L).
4. The PH value is moderate or weakly alkaline (pH value is 7.0-8.0).
5. The content of dissolved oxygen and carbon dioxide in water is moderate (dissolved oxygen in water >; =6mg/L, carbon dioxide content is 10-30mg/L).
6, small molecular water (this is one of the indicators of water activity, 5-6 small molecular water).
7, the physiological function of water is strong (including permeability, solubility, metabolism, etc. ).
Extended data hygiene requirements for drinking water quality
1, drinking water quality should meet the following basic requirements to ensure the safety of users.
2, drinking water shall not contain pathogenic microorganisms.
3. Chemicals in drinking water shall not endanger human health.
4. Radioactive substances in drinking water shall not endanger human health.
5. The sensory characteristics of drinking water are good.
6. Drinking water should be disinfected.
Baidu encyclopedia-drinking water
Baidu Encyclopedia-Hygienic Standard for Drinking Water