This phasing project concerns the implementation of sewerage interventions in the enlarged Municipality of Patras and includes:(a) The projects for the completion of the sewage drainage of the settlements C' Priority of the Operational Program “Environment and Sustainable Development”. b) The construction of the sewerage system of the sub-areas α2.2 and α2.3 of the Bozaitika area.c) The extension of the facilities for the treatment of water.