The project aims at the cross-border connection of the water supply systems of Central and Northern Burgenland (AT) and the region of Sopron (HU) in order to improve the quality of drinking water, to preserve the water resources in a sustainable way and to decrease energy use, by shortening pumping distances. The predecessor project aiming at investment preparation and planning is under implementation co-financed by the AT-HU ETC Programme. The proposed project’s main goal is to establish the infrastructure of the cross-border water supply system, enabling the transfer of drinking water between the involved regions. The project contributes to a strengthened cross-border cooperation and exchange of information between the involved institutions, to an increasingly safe water supply and an improved water quality, which goals are in line with Prioirity 4 of the EUSDR.General objective: to develop water supply in the Pannon-Fertő region through the cross-border connection of the water supply systems of Central and Northern Burgenland and the Sopron region. Specific objectives: increasing operational safety of water supply, protecting water supplies of overdevelopment, lowering energy use, minimisation of disadvantageous impacts on the environment. Expected Results: The main result: the realised infrastructure of the cross-border water supply system. The joint water supply system will result in a better quality drinking water, and in the long term preservation of the water resources. Further results: the consumption peaks of the summer season will be manageable, the consumption of energy will be lowered due to the shortened pumping distances.