On the other hand, in result of the relief, the incased plateaus rivers, that present in its stream beds declivity ruptures, valleys predominate, among others characteristic that confer it one high potential for the generation of electric energy. In such a way, although the National Water Code, of 1934, to be constituted of three books, of number III, that it deals with the hidroelectric potential of the rivers, were only regulated. of the great workmanships. As corollary, in Brazil, the data of the last census (IBGE, 2000) show that, of the population of almost 170 million people, close to 138 million they live in the cities. However, about 64% of our water companies they do not collect the sewers domestic and 110 million Brazilians do not have treat sewer. Poor of this group, around 11 million, they do not have at least access to the clean water to drink. Meanwhile, the indices of total losses of the water treated and injected in the distribution nets of the cities vary of 40% 60% in Brazil, against 5% 15% in the developed countries. Moreover, more than 40 million Brazilians do not receive water from regular form, they cannot trust the quality of the water that arrives in its taps and live in a laborious regimen of caster or very irregular supply of the water. This situation vexatious it occurs in a country whose average water availability in the rivers that never dry are in the house of the 34 a thousand m3/hab/ano, what places Brazil, as member of United Nations, in the classroom of the rich water countries candy of the world. Moreover, must be considered the possibility of use of 25% of the contribution of the underground flows that empty in the rivers, what it corresponds the 4 almost a thousand m3/hab/ano.1 However, what more worries in this situation is that this sanitary drama in the cities of Brazil has not deserved the had attention of the constituted authorities? Executive, Legislative, Judiciary? or of the political parties.