The project concerns the sewage disposal projects of the 2 largest settlements of the Kapodistrian (former) Municipality of Oiniades, i.e. the Occupation and Neochori settlements, which today belong to the Municipality of the Holy City of Messolonghi, as well as the completion of the unclean networks of Kefalovrisos of the Aetolic Municipal Unit. In particular, the present B phase of the project includes:- The completion of the Neochori sewage treatment study.- The completion of the internal Occupation sewage network and the depressive transport pipeline to the existing joint Occupation and Neochori Waste Treatment Plant.- The construction of the inner network Neochori.- The construction of sewerage networks (internal and external) in Kefalovrysos.The project also includes the construction of the inner network of Neochori.