California is apportioned 14x more water from the Colorado Basin than Nevada, Arizona 9x more [1]. Las Vegas has implemented several water conservation measures [2].
Well, sort of. The fact that CA has 14 times the population today is strongly related to the fact that it applied 14 times the water for productive use in the past.
[1] https://en.wikipedia.org/wiki/Colorado_River_Compact [2] https://www.brookings.edu/blog/planetpolicy/2015/05/02/5-fac...