I totally approve what you said prettygirlsmokes420 water should always be pure and clean. Water from city municipal water system should be somewhere around 150ppm and most of the contaminant that make that 150 ppm is chlorine,limescale,chemical sediments,pathogens ,rust and green slime from water system. at 900 ppm your better of using bottled water(nestle,naya) it as 400-500ppm and it's boiled so there is no bacteria. And the ppm's in bottled water dont contain rust and chlorine like tap water does.