The Szamos-Somcs alluvial fan aquifer is located in the sub-basin. In the Hungarian part, the surface water resources are estimated at 652 x 106 mVyear, and groundwater resources at 41 x 106 mVyear. The total in the Hungarian part equals 3,171 mVyear/capita. The hydromorphology of the Hungarian part is also affected; upon regulating the river in 1890, 22 cuts through river bends were made to straighten the river. Some 55% of the total population is connected to the sewerage system (and the wastewater is treated). The influence is ranked as widespread but moderate.