THALIS E.S S.A on 10/06/2022 signed a contract for the project " UPGRADE-EXTENSION OF THE WWTP OF THE MUNICIPALITY OF HERSONISSOS (HERSONISSOS- MALIA- GOUVES)”. The project includes the upgrading of the existing infrastructure of the Urban Wastewater Treatment Plants of the settlements of Gouves, Hersonissos and Malia - Stalida