Abstract. The objective of the research is the identification of the benefits related to infrastructure projects implemented in the Danube Delta Reservation Biosphere. The type of the research refers to a study that aims at the identification of economic benefits related to the systems for potable water supply and sewage/disposal of waste water. The result of the research shows the reduction of expenses with medical assistance and treatments for diseases affecting the digestive apparatus, hepatitis, TBC and also for skin diseases, whose occurrence is favored by the lack of proper hygiene conditions. Also, a series of social benefits will be recorded, such as the development of tourism, reduction of unemployment, facilitation of intervention in case of fire.

Keywords: economic benefits, social benefits, infrastructure projects, Danube Delta Reservation Biosphere.