The contaminated particles included in the plain tap water will not be seen with the naked eye. Thus a person is unaware about the dangerous elements he/she takes in. The local units arent sufficient to get rid of all the impurities from the drinking water supplied though pipes. Thus, you have to bring home drinking water filters in order to purify the water prior to drinking. Get rid of boiling the water for hours before you drink it. Simply add the filter and get thoroughly clean as well as genuine drinking water in few minutes. Household water filters are the need of the hour and will continue to be so.