If you understood distilled water and human health, you couldn't ask such a question about the spring water.
There are people who drink nothing but water and salt. I have read about them, but have no experience with this. It seems they drink tea made with about 1 teaspoon of salt per cup and drink about 20 cups per day and no foods of anykind. I have thought of this and if they had never eaten food, then it would seem possible to live on water and salt.
Salt that is the result of the ocean drying up thousands of years ago and being covered up with clay from volcanic ash as well as dirt over the years, is pretty close to being perfect, it is the result of all dead life on earth, every creature that ever swam the ocean is in there! Every mineral in its proper proportions.
It is 100% pollution free and most of all, it matches the salt/mineral ratio of our blood, same as fish!!!! Get the hint!