In application of European legislation and in the context of streamlining the management of funding and implementation of projects related to the sustainable management of drinking water resources, this project concerns the preparation of the study of the Master Plan for Water Supply of the Municipality of Thassos In the implementation of the Water Safety Plan of the Municipality of ThassosWith the General Plan for Water Management, water management bodies will acquire an important tool with which they will be able to rationally manage existing water and other resources related to water supply.