In the Triângulo Mineiro area are rare and beautiful examples of abiotic natural heritage, such as waterfalls in Given the need to guarantee the water supply at the XXI century, the search had as its objective prepare prospective analysis on the water resources at the municipal scope, been the work divided into three general steps: evaluation of the quantity of available water, evaluation of the water demand and evaluation of the water capacity to support. The obtained results show that the current scene points to the future deactivation of some sources and the consequent overload of others. The evaluation of the water capacity to support showed that the Juiz de Fora County, generally, still can be classifi ed as exporting water. Therefore, if we take into consideration the current quantity of available water, the equivalent population of the water quality was overcome at the three scenes of demographic growth considered, been this the more restrictive indicator among those that were analysed. By the same conditions, the relative indicator of the quantity of available water would be overcome, by the next 30 years, just a scene of maximum demographic growth, revealing to be this indicator the less restrictive among those that were analysed.