It goes without saying that pollution issues have attracted the views in the last decades not only because of its dangerous but also the decrease of the natural resources. Because of that we present here a brief study on a Lake Mariout as an example of pollution matter, and we struggled - or may be burnt some mid night oil - to put some recommendations to help increasing the efficiency of the lake. In chapter one, We gave a brief look on the Lake Mariout, the location, history and its development throughout the years, through chapter two, we move talking about the pollution sources and its impact on the lake, with some precious analysis that makes the reader found out how the problem is big, the recommendations was held in the last chapter as it introduce some precise solutions to the pollution of the lake with completely vision and integrated parts.