The operation will contribute to the closure of waste water systems in the municipality of Arcos de Valdevez, allowing the extension of the public sewage service to the populations of the parishes of Arcos de Valdevez (S. Paio), Tabaçô, Guilhadeses, Prozelo, Couto and Ázere.The investment is associated with the construction of 14.8 km Network AR and 4 EEAR.