COV Trencin lavobrezna Wastewater Treatment Plant, Trenčín, Slovakia

COV Trencin lavobrezna is a municipal wastewater treatment facility located in the Trenčiansky kraj region of western Slovakia, serving the city of Trenčín. The plant treats wastewater from an estimated population of 61,539, placing it in the medium-to-large agglomeration category under EU classification. As a Slovak plant, COV Trencin lavobrezna operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The regulatory framework ensures compliance with national and EU standards for effluent quality. The treated effluent is discharged into the Váh River, the longest river in Slovakia, which flows southwest into the Danube River and eventually reaches the Black Sea. The Váh River supports diverse aquatic life and is an important ecological corridor in the region.

The plant discharges into the Váh River, a major tributary of the Danube River system. The Váh River flows through the western Carpathians and supports a variety of fish species and riparian habitats. Downstream, the Danube River feeds into the Black Sea, making the plant's operations relevant to regional water quality and the broader Danube basin ecosystem.