The content of tap water bleach that meets the national standard is harmless to people.
The active ingredient of bleaching powder is calcium hypochlorite, which dissolves in water and combines with CO2 in the air to produce hypochlorous acid, which has strong oxidizing properties and can kill pathogenic microorganisms. The water source of tap water is usually natural water source in nature, with more impurities and bacteria, the role of bleach is to remove bacteria, viruses and fungal spores.
Because tap water needs to be transported through extremely long pipes from the waterworks, the final chlorine content of household tap water is generally less than 0.05mg/dl in order to ensure sterilization, but this very low concentration of chlorine by itself will not have a significant effect on the body.
Residual chlorine in the water can be decomposed and evaporated after heat, if you smell the tap water can smell a little chlorine irritating flavor, do not be nervous, the water will be boiled to remove residual chlorine in the water, will not have a health impact on the body.