This operation aims to close low wastewater systems in the Municipalities of Arcos de Valdevez, Caminha, Paredes de Coura, Ponte de Lima, Valença, Viana do Castelo and Vila Nova de Cerveira with a view to the expansion of the network in the area of coverage of existing WWTP and the adhesion to the service, by providing the service to about 4,415 inhabitants/1,540 accommodation through the construction of 72 km of SAR Network and 21 Water Lift Stations