Municipalities Jovice, Krásnohorská Dlhá Lúka in Slovakia and Ragály in Hungary are situated in an environmentally valuable (NATURA 2000) area. They are at the edge of the Aggtelek National Park and the Slovak Karst National park.The waste water is treated in cesspits and septic tanks, which are technologically in bed condition. The waste water pollutes the underground water as far as the karst limestone rocks are. porous The stream Čremošna is drinking water source for these municipalities and also is polluted by waste water.In Ragály there is no waste water treatment infrastructure and there is planned a waste water cleaning plant and a sewerage system for 712 inhabitants. In Jovice there has been built waste water cleaning plant for 750 inhabitants but there is missing a part of the sewerage system. In Krásnohorská Dlhá Lúka is no sewerage system. In framework of the project there will be built a pipeline connecting the two municipalities. The existing waste water cleaning plant will be extended to capacity of 2080 inhabitants and upgraded by technology to have enough capacity for both municipalities and for a disposal of waste water from Lipovník. From Lipovník the will be the waste water transported by tanks to the Jovice waste water cleaning plant.These municipalities suffer from depopulation. Potential investors move away for missing infrastructure. After finishing the planned infrastructure the villages will become more attractive for business. Businesses creating jobs will stop people moving out, will raise the income of the village from taxes, which will allow to build more infrastructure and make more attractive the village for businesses.There is a great potential for tourism development. Having near two national parks there creates good conditions for rural tourism. Achievements: The municipalities Jovice, Krásnohorská Dlhá Lúka in Slovakia and Ragály in Hungary are situated in an environmentally valuable area (NATURA 2000). They are at the edge of the Aggtelek National Park and the Slovak Karst National park. With the purpose of increasing the protection of surface and underground waters in this area, waste water treatment plants and sewerage systems in the municipalities of Jovice, Krásnohorská Dlhá Lúka on the Slovak side and in the municipality of Ragály on the Hungarian side were constructed.