Drinking Water
"Health-based water quality targets define drinking-water as water that does not represent any significant risk to health, generally over a lifetime of consumption. Therefore, drinking-water shall be free from any of the various microbial, chemical, radiological and physical contaminants which, in numbers or concentrations, constitute a potential danger to human health." (WHO, 2021)
Sources
World Health Organization (WHO). "A global overview of national regulations and standards for drinking-water quality, second edition". Geneva: World Health Organization (2021). https://www.who.int/publications/i/item/9789240023642