We know what the money/arms/drugs cartels (i.e. the big banks) are like, what will the future bring when the worst gangsters on Earth control our water? Here are two good discussions of the topic as it relates to the third world.
Water privatisation: Senegal at the crossroads
http://www.pambazuka.org/en/category/features/73837
The commodification of water and land in Mali
http://www.pambazuka.org/en/category/features/73861