COV Holysov Wastewater Treatment Plant, Holýšov, Plzeňský kraj

COV Holysov is a municipal wastewater treatment plant located in Holýšov, a town in the Plzeňský kraj region of the Czech Republic. The plant serves a population of approximately 7,238 people and has a designed capacity of 7,000 m³ per day, with an average discharge volume of 977.78 m³/day. The plant provides secondary treatment, which is the standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids, ensuring compliance with EU effluent standards before discharge. The treated effluent is discharged into local watercourses that eventually drain into the Berounka River, a tributary of the Vltava River, which flows into the Elbe River and ultimately reaches the North Sea. The plant plays a key role in protecting the water quality of these rivers and the downstream aquatic ecosystem.

The plant discharges into the local watershed, which feeds into the Berounka River, a significant tributary of the Vltava River. The Vltava flows through Prague and joins the Elbe, which drains into the North Sea. This catchment supports diverse aquatic life and is important for regional biodiversity. The secondary treatment provided by the plant helps reduce nutrient and organic pollution, mitigating eutrophication risks in downstream waters.