The catchment area of the Jadro and Žrnovnica springs, which is a typical Dinaric karst aquifer that supplies water to the city of Split and its surroundings, is studied in the paper. The trend of ...typical spring-water pollution indicators is analysed, water quality is estimated, and anthropogenic impact is assessed based on the COST 620 procedure, through analysis of hazards threatening to pollute water in this drainage area.