A. Multipure drinking water systems deliver clean, fresh tasting, high quality purified drinking water that for the most part meets or exceeds stringent water standards set by The National Science Foundation that can be independently verified by consumers at www.nsf.org. Don’t take our word for it, become a facts checking consumer, go to www.nsf.org and ‘Search Certified Products and Systems’ to give yourself the satisfaction that the Multipure product you are purchasing is certified by NSF to assure quality, aesthetics and health effects.