COV Tlmace Wastewater Treatment Plant, Veľké Kozmálovce, Nitriansky kraj

COV Tlmace is a wastewater treatment plant located in Veľké Kozmálovce, a village in the Levice District of Nitriansky kraj, western Slovakia. The plant serves a population of 2,769, placing it in the small agglomeration category under Slovak and EU regulations. The plant provides primary treatment, which involves physical processes such as sedimentation to remove settleable solids. With a design capacity of 4,000 m³/day and an actual discharge volume of 566.69 m³/day, the plant operates well below its capacity. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), agglomerations of this size are generally required to provide secondary treatment, but transitional arrangements or specific local conditions may apply. The treated effluent is discharged into a local watercourse that eventually drains into the Hron River, a major tributary of the Danube. The Danube flows into the Black Sea, making this plant part of a large international river basin. The surrounding region is predominantly agricultural, and the plant helps protect local streams and groundwater from untreated sewage.

The plant discharges into a small stream that flows into the Hron River, which is a right-bank tributary of the Danube. The Danube carries water through several countries before reaching the Black Sea. The local watershed supports agricultural activities and provides habitat for fish and other aquatic species. Protecting water quality in this basin is important for downstream ecosystems and for maintaining the ecological integrity of the Danube River system.