Where does Californias freshwater come from aqueducts or levees.?
Between 25 and 40 percent of California’s water supply in an average year comes not from surface streams or reservoirs but rather from beneath the ground. That figure can be as high as two thirds in critically dry years.[7] In fact, California uses more groundwater than does any other state.[8] Californians extract an average of 14.5 billion gallons of groundwater every day — nearly twice as much as Texas, the second-ranked state. http://www.nrdc.org/water/pollution/ccg/… The Colorado River supplies about 14 percent of the water used in California by agriculture, industry, commercial businesses, and residential customers. As shown in Figure 1, Colorado River water is by far the most important source of water used in Southern California–accounting for over 60 percent of its water supply.
