COV Prievidza Wastewater Treatment Plant, Prievidza, Slovakia

COV Prievidza is a municipal wastewater treatment facility located in Prievidza, a town in the Trenčiansky kraj region of western Slovakia. The plant serves an estimated population of 47,895, placing it within the medium agglomeration category under EU classifications. As part of Slovakia's wastewater infrastructure, it plays a key role in managing domestic sewage from the urban area. 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 mandates that plants serving between 10,000 and 150,000 population equivalent must achieve appropriate treatment standards to protect receiving waters. Slovakia has transposed this directive into national law, and the plant is subject to regular monitoring by the Slovak Water Management Enterprise. The treated effluent is discharged into the local hydrological network, which ultimately drains into the Váh River basin. The Váh is the longest river in Slovakia and flows into the Danube River, which then reaches the Black Sea. The plant's operations help protect downstream water quality in the Váh and Danube systems, supporting aquatic ecosystems and downstream water uses.

The plant discharges into the Váh River basin, a major tributary of the Danube River. The Váh River supports diverse aquatic life and is an important ecological corridor in the Carpathian region. Downstream, the Danube River flows into the Black Sea, making the plant's treatment performance critical for reducing nutrient loads and protecting the Black Sea ecosystem from eutrophication.