Apparently, the Colorado River is drying up:
There may be ways to live with a permanently drier Colorado, but none of them are easy. Finding more water is possible — San Diego is already building a desalination plant on the Pacific shore — but there are too few sources to make a serious dent in a shortage.
That leaves conservation, a tack the lower-basin states already are pursuing. Arizona farmers reduce runoff, for example, by using laser technology to ensure that their fields are table flat. The state consumes essentially as much water today as in 1955, even as its population has grown nearly twelvefold.
Working to reduce water consumption by 20 percent per person from 2010 to 2020, Southern California’s Metropolitan Water District is recycling sewage effluent, giving away high-efficiency water nozzles and subsidizing items like artificial turf and zero-water urinals.