Abstract
Water resources are essential for life on earth. It has already been proven that although it is a resource renewable, water is a limited natural resource. Countries like Brazil, Angola and the United States of America, despite being on different continents and having economic development indices very different, are privileged in this regard, and that is why they were chosen to be objects of this search. But the lack of preservation of this natural resource in all of them, combined with poor water distribution, triggered important warnings in these nations. Consequently, it was necessary to implement regulation for water protection and its correct distribution. From this delimitation, the object of this article is to investigate the main foundations and instruments existing in the Water Laws edited in the Brazil, Angola and the United States. With the use of the deductive method and from research bibliographical and legislative of each of the countries, it is concluded by the need of adequate use of the water resources from the principle of sustainability and the constitutional principles governing the environmental and urban policy, as it is a limited and fundamental resource for the survival of humanity.
Keywords
Environment; Pollution; Water; Sustainability