Hate to be that guy but do you have a source for this? That's pretty incredible and I'd want to read more.
nevermind: the parent article pretty much covers it
nevermind: the parent article pretty much covers it
http://www.motherjones.com/environment/2014/02/wheres-califo...
And here's the original research.
http://www.waterfootprint.org/Reports/Report47-WaterFootprin...