COV Kostolany nad Hornadom - Closed Secondary Wastewater Treatment Plant in Kostoľany nad Hornádom, Slovakia

COV Kostolany nad Hornadom is a wastewater treatment plant located in Kostoľany nad Hornádom, a village in the Košický kraj region of eastern Slovakia. The plant provided secondary treatment for municipal wastewater, serving the local population as part of the region's sanitation infrastructure. As a secondary treatment facility, the plant met the minimum requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of its scale. The directive mandates secondary treatment for discharges into freshwater bodies, ensuring reduction of organic matter and suspended solids. The plant's treated effluent was discharged into the local watershed, which drains into the Hornád River, a tributary of the Slaná River, eventually reaching the Tisza River and the Black Sea. The Hornád River supports diverse aquatic life and is an important ecological corridor in eastern Slovakia.

The plant's treated effluent entered the Hornád River, a significant watercourse in eastern Slovakia that flows through the Košice region. The Hornád River is part of the Tisza River basin, which ultimately drains into the Black Sea. The river supports a variety of fish species and provides habitat for aquatic invertebrates, contributing to the ecological health of the broader Tisza watershed.