More specifically agriculture is 77% and residential is 13% according to this UCLA report from 2009 (though there data looks like it is from 2005). http://www.

More specifically agriculture is 77% and residential is 13% according to this UCLA report from 2009 (though there data looks like it is from 2005). http://www.environment.ucla.edu/reportcard/article4870.html http://www.environment.ucla.edu/reportcard/article4870.html http://www.environment.ucla.edu/media/images/water-fig1-lrg.jpg http://www.environment.ucla.edu/media/images/water-fig1-lrg....