H2o Is made up of Actual physical, chemical and micro-biological impurities and that is adsorbed & arrested based on the kind of impurities. For this reason the water after passing from the purification phases that is between five-eight stages in case of RO purifier, is pure & Protected drinking water. https://medium.com/@new.lomazoma/liv-pure-reviews-pros-and-cons-c9d854c81579