Legislation prohibiting grass as residential landscaping has passed and is in effect in the Vegas valley. Any new construction can not have turf. Local nurseries can not even sell sod.
We are also on mandatory watering schedules, which limit outside watering as well as prohibiting vehicle washing unless it is done at a commercial car wash.
Water features on the strip and golf courses do use reclaimed waste water which doesn't get treated like our drinking water. However, they do get preferential treatment.