The current "Sanitary Standards for Drinking Water" (GB5749-2006) stipulates strict hygiene requirements for drinking water quality, namely: ①Good sensory properties: transparent, colorless, no peculiar smell and odor, and no visible objects; ② Epidemiologically safe: it does not contain pathogenic microorganisms and parasite eggs; ③The chemical composition is harmless to humans: the chemical substances contained in the water do not cause acute, chronic and long-term harm to the human body. [2]
