COV Ostrov Wastewater Treatment Plant, Horní Tašovice, Czech Republic

COV Ostrov is a wastewater treatment plant located in Horní Tašovice, a settlement within the municipality of Stružná in the Karlovarský kraj region of the Czech Republic. The plant serves a population of around 11,745, placing it in the medium agglomeration category under EU classification. As a Czech plant, COV Ostrov operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The directive also mandates more stringent treatment if the receiving waters are designated as sensitive areas. The plant is expected to meet the regulatory standards for its population equivalent. The treated effluent from COV Ostrov is discharged into local watercourses that eventually drain into the Ohře River, a major tributary of the Elbe River. The Elbe flows through Germany and into the North Sea, making this plant part of a transboundary river basin. The plant plays a key role in protecting the water quality of the Ohře and Elbe rivers, supporting aquatic ecosystems and downstream water uses.

COV Ostrov discharges into the Ohře River basin, which flows into the Elbe River and ultimately the North Sea. The Ohře River supports diverse aquatic life and is an important water resource for the region. The plant's treatment helps maintain water quality in this transboundary river system, which is ecologically sensitive due to its role as a migratory corridor for fish and its use for drinking water abstraction downstream.