The act Upgrading and modernizing the existing Panagia Potamia WWTP concerns the upgrading of the existing waste water treatment plant of Panagia Potamia in Thassos to meet the needs of the settlements of Panagia and Potamia as well as the settlements of Skala Panagia Chrysi Ammoudia and Skala Potamia Chrysi Akti as well as the pumping stations for the supply of waste water from the above settlements.