Nevada only uses a small percentage of the Colorado river water (https://en.wikipedia.org/wiki/Colorado_River_Compact https://en.wikipedia.org/wiki/Colorado_Riv

Nevada only uses a small percentage of the Colorado river water (https://en.wikipedia.org/wiki/Colorado_River_Compact https://en.wikipedia.org/wiki/Colorado_River_Compact). Most of the water is used for farming in the desert.