This informative article by Judy Sheldon gives us a look at just that:
We know water is essential to life, but do we truly know what we are drinking?
Water, while very similar, has important differences. It begins with the origin; be it lake, river, sea or subterranean, such as a well. Water can be considered hard or soft, depending on the minerals, calcium and magnesium salts found in it – Corrosion doctors.org
Dr. John R. Christopher in herballegacy.com defines water in ten categories:Hard water – This is water found in lakes, rivers, on the ground, from wells. This water contains high levels of calcium, iron, magnesium and inorganic minerals.Boiled water – Though boiling removes some germs from water...
[Read more from: What Kind of Water are We Drinking?]