> The rest of the country has a surplus of water from rain I think this too strong of a generalization. The Great Plains region, for example, relies on the Og

> The rest of the country has a surplus of water from rain I think this too strong of a generalization. The Great Plains region, for example, relies on the Ogalalla Aquifer for it's groundwater, which has been dropping at accelerating rates because so many farmers and ranchers draw heavily from it (even more than they would otherwise, thanks to crop subsidies), along with being a huge drinking water source. The depletion of groundwater is a big deal in that region.