Assessment of current conditions of the Bílina River in the Czech Republic

River Bilina is a river that flows in the northwestern part of the Czech Republic. From the middle of the 20 th century it was used as a water source for several chemical and power plants and thus was greatly affected. The lignite surface mining and mine openings made covering the river with a tube and changing its direction inevitable (with straightening and fortifying as well). In this article we have studied the hydrology, hydrochemistry and bottom sediments of the Bilina River and evaluated its current condition through data obtained.