 The inland discharge of clandestine sewage from homes and businesses has been causing eutrophication in the ecosystem in an aggressive way.The systemic corruption of the municipality began from its political-administrative emancipation on April 10, 1992, and destroyed much of Rio das Ostras that to date there is no type of basic sanitation.The lack of potable water, sewage, public road paving and public transportation are old and systemic problems for a municipality that received trillions in oil royalties.