The projects to be studied are going to serve the DK Alistratis and N.Zichni of the Municipality of Nea Zichni, which until today do not have an integrated system of collection and treatment of their waste water. These are projects for the completion of the sewerage networks of the settlements and the construction of the required wastewater treatment facilities. The completion of the projects to be studied will meet the requirements of the environmental acquis of the Union (conformity with Directive 91/271 EEC) and will address the needs for the improvement of the environment and the development of the infrastructure of the Municipality of Zichni in the settlements of Alistratis and N.Zichni.