COV Secovska Polianka Wastewater Treatment Plant, Secovska Polianka, Slovakia

COV Secovska Polianka is a wastewater treatment plant located in Secovska Polianka, a village in the Vranov nad Toplou district of Presovsky kraj, eastern Slovakia. The plant serves a small population of 350 residents, reflecting its role in a rural community. The plant employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations under 2,000 population equivalent. Its designed capacity of 2,700 m³/day indicates infrastructure sized for potential future growth or seasonal variations. The current discharge volume of 71.63 m³/day suggests low utilization relative to capacity. The treated effluent is discharged into local waterways that ultimately drain into the Topla River, a tributary of the Ondava River, which flows into the Bodrog River and then the Tisza River, a major tributary of the Danube. This places the plant within the Danube River Basin, a transboundary watershed of significant ecological and economic importance.

The plant discharges into the Topla River catchment, part of the Danube River Basin. The Topla River flows through agricultural and forested areas in eastern Slovakia, supporting diverse aquatic life. Downstream, the river joins the Ondava and Bodrog rivers, which are important for migratory fish and waterfowl. The advanced treatment level helps protect these water bodies from nutrient pollution, which is critical given the basin's sensitivity to eutrophication.