The object of the project is the construction of an integrated urban wastewater management system for the settlements of PatitiriVotsi in the Municipality of Alonissos as there is currently no relevant infrastructure The two settlements border each other without distinct boundaries and constitute a single residential complex which is included in the settlements of Priority C. In particular, the project includes the preparation of a final study of the internal networks and a preliminary design of the transmission pipeline and the WWTP, and then the construction of the internal sewerage network of the single residential complex PatitiriVotsi with the corresponding pumping stations of the WWTP Treatment Plant of the central sewerage pipeline to the WWTP and the final disposal pipelines.