I looked up annual rainfall in Sevier UT, and the websites I saw said less than 10 inches a year. Given the average rainfall, altitude and general location, my guess is that the area would be considered high mountain desert. This is climate generally means low humidity, poor soil moisture retention and low average rainfall. I know that the last couple of winters in Utah have had some unusual snowfall amounts, and snow pack well into the spring, but that doesn't mean that the average precipitation is up more than a few inches.
Until a pump broke recently, my water district allowed lawn watering twice a week. We only water every five days, so actually have lower usage than some of our neighbors. Texas has water problems and will continue to do so. I've been slowly changing my lawn into well-mulched xeric beds, and hardscaping. I think that in the American West water shortages will become an issue for social unrest, political turmoil, and a cause for migration before oil shortages cause problems. Already states like Texas, Arizona and California are looking at who gets water, what the priorities are, whether municipalities get more water than farmers, whether watering restrictions are passed on homeowners or farmers first, etc. We have unsustainable growth, with little restrictions on how water is used. Unfortunately, it is a finite resource that is absolutely essential.