Mineral water comes from underground reservoirs. Unlike regular drinking water, mineral water does not undergo chemical processing.
As water travels through the many layers of earth, sand and rock, the water dissolves minerals, such as iron, calcium, magnesium, potassium and sodium, from these layers. This is one of the reasons that some choose to drink spring water but it could also be a reason not to, as harmful minerals, such as mercury and lead, can also be dissolved.
Other spring water seekers insist that, because spring water is stored deep within the earth, it is protected from contaminants, such as pesticides, pharmaceuticals and other chemicals that tap water can come in contact with. However, just because water comes from underground, doesn’t mean that it has come from deep underground or that it’s clean and safe to drink.
One of the main downsides to mineral water is cost and in addition many of the minerals from this type of water can also be obtained from a healthy, varied diet.