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When population density and proportion of arable land is low (less than 15 inhabitants per km² and 10% arable land), the majority of classified river water bodies are reported to have good or better ecological status or potential and to be  without significant pressures. Diffuse pollution affects only a small proportion of the river water bodies (less than 15%). Hydromorphological pressures are nevertheless reported for a substantial proportion of the classified river water bodies (30-40%) even at the lowest level of population density and proportion of arable land, which is probably related to the use of many upstream rivers in mountain areas for hydropower production.