what are mineral water
1 Mineral water â water from a mineral spring that contains various minerals, such as salts and sulfur compounds. 2  It comes from a source tapped at one or more bore holes or spring, and originates from a geologically and physically protected underground water source. Mineral water â water from a mineral spring that contains various minerals, such as salts and sulfur compounds. 2  It comes from a source tapped at one or more bore holes or spring, and originates from a geologically and physically protected underground water source.