With this project, the Municipality of Archanes Asterousia will modernise and expand the internal drainage networks of the settlement Pyrgos.The proposed collection network covers almost all of the streets of the settlement Pyrgos, where active residential activity and development are observed. The problem of waste water management of the settlement of Pyrgos has not been tackled effectively until today. With the advanced funding of the NSRF 2007-2013, a sewage treatment plant was built, as well as the external networks, which serve part of the settlement. Part of the existing internal drainage networks require modernisation.The rest of the area under study is served by old septic or absorbent sewage septics, resulting in pollution of soil and ground and surface aquifers as well as the appearance of odors due to the septic conditions of the sewage. For the above reasons the project needs construction. The proposal has a deadline of 18 months.