Rapid population growth, excessive water consumption, water pollution, and years of drought have depleted the Southwest’s natural water reserves and put the region at greater risk of a water crisis. Without a dramatic change from business as usual, the Southwest’s water scarcity problem will only get worse as population growth and global warming impacts further exacerbate the problem. This report details existing water efficiency technologies and effective water conservation programs the six states in the Southwest could use to save as much as 5.7 million acre-feet of water per year.