ABSTRACT: The maps of groundwater vulnerability represents especiaUy in regions of karst - fissure type of permeability of the rock environment, an important source of information, which can be used for demarcation of protective zones for water supply, also for environmental impact assessment, appraisal of waste storage and for prediction of the exploitation of the natural resources of groundwater. Concerning to the type of the rock environment in Licinska pahorkatina upland it is appropriate to apply the method REKS, which uses four parameters: rocks, epikarst, karstification, soil.