Every natural water has the amount of minerals in it but these minerals are in much quantity depending on the quality of water. the unit of measuring the minerals is TDS(Total Dissolved solids) or PPM Part per million. If the water has less then 1000tds its mean it can be filtered easily and can drinkable and if it is more than this quantity it can not be drinkable. The water of seas has more that 40000tds. So Nestle, Aqufina, Purewater, Aqua like companies just making goof to the people that they are selling Mineral water. That is already rich with mineral actually they just filtered that in RO plant that is called pure perineum drinking water not mineral water. https://facebook.com/qazianser