COV Line Wastewater Treatment Plant, Sulkov, Plzeňský kraj

COV Line is a municipal wastewater treatment plant located in Sulkov, a part of the Líně municipality in the Plzeňský kraj region of the Czech Republic. The plant serves a population of around 3,162 people and operates under Czech national regulations aligned with the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant provides secondary treatment, which is the standard required for agglomerations of this size under the EU directive. With a designed capacity of 5,475 m³/day and an average discharge volume of 777.37 m³/day, the plant operates well within its capacity, indicating efficient management of the local wastewater load. The treated effluent is discharged into the local water system, which ultimately drains into the Berounka River, a tributary of the Vltava River, and then into the Elbe River before reaching the North Sea. This downstream connection highlights the plant's role in protecting the water quality of the Berounka and Elbe basins, which support diverse aquatic ecosystems and are important for regional water resources.

The plant discharges into the local watershed that feeds the Berounka River, a significant tributary of the Vltava River. The Berounka River flows through the Plzeňský kraj region and supports a variety of fish species and riparian habitats. Downstream, the Vltava joins the Elbe, which drains into the North Sea. The plant's secondary treatment helps reduce organic pollutants and nutrients, protecting the ecological health of these water bodies.