Hydrological characteristics of the catchment area of the river Koszarawa including selected hydrochemical components was based on the analysis: the results of hydrometric research carried out in hydrological year 2007/2008 and hydrological data of the quality surface water monitoring by WIOŚ. The catchment area of the river Koszarawa is characterized by high varia-bility of flows, result from the diversity of components of the geographical environment and the human activity. The hydro-chemical analysis classify surface waters of this catchment area to the first class quality
