The project concerns the completion of the wastewater treatment plant collection and construction infrastructure of the Municipal Community of Molai and the Local Community of Pakia of the Municipality of Monemvasia, a priority settlement, which lacks a sewage and biological sewage treatment network. This project will acquire the above infrastructure within the framework of the obligations arising from the implementation of Directive 91/271 of the European Union. In addition, public health will be protected and the quality of the ecosystem will be upgraded, with positive impacts on the quality of life and tourism in the region.