COV Jelka Wastewater Treatment Plant, Jelka, Trnavský kraj

COV Jelka is a municipal wastewater treatment plant located in Jelka, a village in the Trnavský kraj region of western Slovakia. The plant serves a population of 1,098 and is part of the local infrastructure managed under Slovak national regulations, which transpose the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant provides secondary treatment, a standard level for small agglomerations in Slovakia. Its designed capacity is 4,500 m³/day, with an average discharge volume of 224.71 m³/day, indicating significant spare capacity. As an EU member state, Slovakia requires secondary treatment for all discharges from agglomerations above 2,000 population equivalent, though smaller plants like COV Jelka also typically meet this standard. The treated effluent from COV Jelka is discharged into local watercourses that drain into the Danube River basin, ultimately reaching the Black Sea. The plant plays a key role in protecting the region's surface waters from nutrient pollution and organic load, supporting aquatic life and downstream water quality.

COV Jelka discharges into the local drainage network within the Danube River basin, which flows through Slovakia and into the Black Sea. The region's waters support diverse aquatic ecosystems and are used for agriculture and recreation. Effective treatment helps prevent eutrophication and maintains the ecological health of downstream rivers and wetlands.