It's not that complicated and I described it in my first post. Rain water is distilled (so is my water at first). Rain water interacts with minerals when it falls on prestine land such as certain mountains. (Add a small amount of minerals to distilled water). The minerals have certain charges that change the structure of the water (quantum stir wands).
Some might be skeptical that minerals have charges but apparently science has determined that certain crystals have charges. Visit the gem collection at the Field Museum in Chicago and you will see at least one type of crystal where they have to isolate it from air because its charge attracts dust. The mineral tourmaline is known to carry a piezoelectric charge, it is documented on wikipedia.