COV Velky Krtis Wastewater Treatment Plant, Malý Krtíš, Slovakia

COV Velky Krtis is a municipal wastewater treatment plant located in Malý Krtíš, within the Veľký Krtíš district of Banskobystrický kraj, Slovakia. The plant serves a population of approximately 8,878 people, placing it in the small-to-medium agglomeration category under EU classification. As a Slovak facility, the plant operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for agglomerations of this size. The directive also mandates more advanced treatment if the receiving waters are designated as sensitive areas. Compliance with national regulations ensures a standard level of treatment. The treated effluent is discharged into local waterways that ultimately drain into the Danube River basin, which flows into the Black Sea. The plant plays a key role in protecting the region's water quality and supporting the ecological health of downstream aquatic environments.

The plant discharges into the local watershed within the Danube River basin, which drains southeastward through Hungary and Romania into the Black Sea. The region's aquatic ecosystems support diverse species, including fish and invertebrates, and the plant's treatment helps maintain water quality in downstream rivers and wetlands. Protecting these waters is important for both ecological balance and human use.