COV Topolcany Wastewater Treatment Plant, Nitrianska Streda, Slovakia

COV Topolcany is a municipal wastewater treatment plant located in Nitrianska Streda, a village in the Topoľčany district of the Nitriansky kraj region in western Slovakia. The plant serves a population equivalent of approximately 37,000, placing it in the medium agglomeration category under EU classification. As a Slovak facility, the plant 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 plant's treatment processes and capacity are managed to meet these regulatory standards. The treated effluent is discharged into local waterways that ultimately drain into the Danube River basin, which flows into the Black Sea. The plant plays a key role in protecting the region's water quality and supporting the ecological health of downstream aquatic environments.

The plant discharges into the Nitra River catchment, a tributary of the Váh River, which flows into the Danube River and eventually reaches the Black Sea. This watershed supports diverse aquatic life and is important for regional biodiversity. The plant's operations help reduce nutrient and pollutant loads, protecting downstream ecosystems from eutrophication and other water quality issues.