Not to be obtuse, but why?
If water is "free" to everyone, then no one will have any....well not unless they happen to live adjacent to a fresh water source and even then it's going to cost you something. The truth is that the ability to obtain and distribute fresh water costs something. If there is no profit to be made on an item, it will not be produced. Water is pretty basic to most of what we do, so you're paying for it over and over again, through your taxes, through your water bills, through your energy bills, through the items you consume or even don't consume. I personally want lots of fresh water to be available reliably in adequate quantities for everyone....but that will not happen through magic....it will happen because someone can make a buck off it, be that a multinational corporation, or your local municipality.
