Background : Las Vegas has often been described as offering the paradox of wasting large amounts of water for the tourism industry, whereas it is located in an arid desert area. However, a closer examination shows that it is residential demand that is responsible for most of water use. Method : This paper will rely on the analysis and comparison of the main water policy elements in several Western cities, with a special focus on Las Vegas. Results : The city authorities embarked, in the late 1950s, in policies aimed at reducing a very large residential water demand. If the authorities have been successful, efficiency gains can certainly be achieved as per capita use remains high in the Las Vegas area, and tariffs low. Conclusion : Politi...