In our generation of new technologies and high civilization, it is hard to believe that our world is in a water crisis. This crisis affects not only the less developed regions of the world, but also the most developed countries, with approximately one third of humanity suffering from water scarcity (Molden 2010). One of the main causes is overpopulation. Faced with the growing demand for water, the water sources we currently have are not able to renew themselves. Another factor in water shortage is unsaved water consumption. Today, most countries are beginning to realize that it is crucial to solve the problem of water scarcity. One of them is Mexico, where water scarcity is a national problem. Water shortage in Mexico The total area of ​​Mexico is slightly less than 2 million km2 (UNESCO 2006). The population is approximately 103 million (Castro and Heller 2009). Over the past two decades, as the country's population increased intensively, the demand for water also increased dramatically. According to Armentia and Cisneros, the number of people without access to water supply is approximately 11 million, or almost 11% of the Mexican population (Castro and Heller 2009). But there are many more people who do not have access to drinking water. In addition, this situation of lack of water is exacerbated by the dysfunction of sewer networks. But to understand the causes of water shortage in Mexico and to evaluate the government's policy in this sector, it is necessary to observe it carefully. Mexico is a very urbanized country. Nearly 78% of its citizens live in cities (Castro and Heller 2009). This is why citizens in urban areas suffer the most from considerable water shortage. The water supply situation in urban areas is critical. For example, Mexico City, which has around 20 million inhabitants, faces a severe water shortage. It draws its water from 3 main basins, all overexploited (UNESCO 2006). The government's solution to this problem was to pump water from aquifers. However, these palliative actions by the government have not solved the problem: three aquifers from which the city draws its water are overexploited (UNESCO 2006). Another measure taken by the Mexican government is to charge money for water consumption (Castro and Heller 2009). This fact encourages Mexican citizens to save water, because the more water they waste, the more money they pay..