The project concerns the implementation of a Water Safety Plan of the Municipal Water Supply Company of Chios, which aims to ensure public health and the implementation of good practices in the drinking water supply system. The project includes a collection of available information on the water supply system, evaluation of the collected data on their completeness, validity and need to update them, implementation of the Water Safety Plan and carrying out required laboratory analyses, evaluation of the effectiveness of actions in the implementation of the Water Safety Plan Guide and consideration of its modification to avoid and deal with emergency incidents.