COV Roznava Wastewater Treatment Plant, Brzotín, Slovakia

COV Roznava is a municipal wastewater treatment plant located in Brzotín, a village in the Rožňava district of Košický kraj, eastern Slovakia. The plant serves a population of around 11,422, placing it in the medium-agglomeration category under EU classification. As a Slovak facility, COV Roznava 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 advanced treatment if the receiving waters are designated as sensitive areas. The regulatory framework ensures compliance with EU standards. The treated effluent from COV Roznava is discharged into local watercourses that drain into the Slaná River, a tributary of the Tisza River, which ultimately flows into the Danube and then the Black Sea. The plant plays a key role in protecting the water quality of the Slaná River basin and downstream ecosystems.

COV Roznava discharges into the Slaná River basin, part of the Tisza River catchment that drains into the Danube and the Black Sea. The Slaná River supports diverse aquatic life and is an important migratory corridor for fish species. The plant's operations help maintain water quality in this transboundary river system, which is ecologically sensitive due to its role in the larger Danube basin.