COV Cata Wastewater Treatment Plant, Pohronský Ruskov, Slovakia

COV Cata is a former wastewater treatment plant located in Pohronský Ruskov, a village in the Levice District of Nitriansky kraj, western Slovakia. The plant provided secondary treatment for the local population before its closure. As a secondary treatment facility, COV Cata would have met the standards required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of its size. The directive mandates secondary treatment for all discharges from agglomerations above 2,000 population equivalent, which is typical for small rural communities in Slovakia. The plant's treated effluent would have discharged into a local watercourse, contributing to the Hron River basin, which flows into the Danube River and ultimately the Black Sea.

The plant is located inland in the Nitriansky kraj region, part of the Danube River basin. Its treated effluent would have entered a tributary of the Hron River, which flows into the Danube near Štúrovo. The Danube is a major European waterway supporting diverse aquatic ecosystems and providing water for millions. The closure of the plant reduces local discharge impacts but may require alternative treatment to protect downstream water quality.