This project aims at the construction of an internal sewage network of the settlement of Chortiatis so that it can be drained with a network of 100 m2. The connection of this network with an external pipeline to the settlement of Exohi with the construction of the required pumping stations and bypassing the existing unlicensed waste water treatment plant which, due to age, operates with problems affecting the quality of an adjacent torrent that ends in the stream of Thermi The construction of a new sewage network in the settlement of Asvestochori to ensure the coverage of the needs of the settlement at 100 m2. The above ensure a modern sewage network that will fully serve the inhabitants of the settlements of Chortiatis and Asvestochori and with its operation will ensure the protection of the natural environment