COV Sladkovicovo Wastewater Treatment Plant, Sládkovičovo, Slovakia

COV Sladkovicovo is a municipal wastewater treatment plant located in Sládkovičovo, a town in the Trnavský kraj region of western Slovakia. The plant serves a population of approximately 1,747 people and is designed to handle a capacity of 3,300 cubic meters per day. The plant provides secondary treatment, which is the standard biological treatment stage required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The directive mandates secondary treatment for all discharges from agglomerations with a population equivalent (PE) above 2,000, and this plant falls within that category. The treated effluent is discharged into local watercourses that ultimately drain into the Danube River basin. The Danube flows southeast through Slovakia and into the Black Sea, making this plant part of a large international watershed that supports diverse aquatic ecosystems and provides water for millions of people.

The plant discharges into the local drainage network that feeds into the Danube River, which is the second-longest river in Europe and flows into the Black Sea. The Danube basin supports a rich diversity of fish species and provides critical habitat for migratory birds. The region's flat terrain and agricultural land use mean that nutrient removal from wastewater is important to prevent eutrophication in downstream waters.