No matter how filthy the 'statistics' may make water, water is still the healthiest drink available to the world and all people should first have that before even considering opening up that can of Mountain Dew (which is the 2nd healthiest drink, just kidding!).
Getting serious now, with all the technology we humans have nowadays, I can't understand why we can't get massive amounts of water to all places that badly need it for next to nothing. There has to be some sort of barrier, whether it'd be political boundaries or geographic boundaries, etc. It is those that we need to find a way past first without sacrificing anything to do it. Then we can find engineering and/or technological ways to get the water over to those places.