Some of the most heavily advertised waters on the market are “purified waters,” meaning they come from municipal (tap water) sources and are put through substantial processing treatments. (Don’t be fooled by pictures of mountains or bodies of water on the labels of purified waters!) Spring waters come from some underground formation through which water naturally moves to the earth’s surface. Spring water must, by law, be collected at the source or via a bore hole that taps the underground formation. Every spring is a little different, depending upon water depth, rock formations, etc.