Because most of the US does not have this problem. The Colorado River basin does, but it's worth noting that California's allocation is very high relative to th

Because most of the US does not have this problem. The Colorado River basin does, but it's worth noting that California's allocation is very high relative to the portion of the drainage basin within the state, and most of the state's allocation (>88%) is pumped out of the basin. Top users of California's allocation of Colorado River water are [1]: - the Irrigation Districts of the Imperial Valley (~61%) and its northwest extension the Coachella Valley (~8%); - the Metropolitan Water District of Southern California (~20%) [2]; - the Palo Verde Irrigation District (~8%). The Palo Verde Irrigation District is inside the Colorado River basin. [1] https://www.usbr.gov/lc/region/g4000/4200Rpts/DecreeRpt/2018/2018.pdf https://www.usbr.gov/lc/region/g4000/4200Rpts/DecreeRpt/2018... [2] http://www.mwdh2o.com/AboutYourWater/Sources%20Of%20Supply/Pages/default.aspx http://www.mwdh2o.com/AboutYourWater/Sources%20Of%20Supply/P...