COV Chlumcany Wastewater Treatment Plant, Chlumčany, Czech Republic

COV Chlumcany is a municipal wastewater treatment plant located in Chlumčany, a town in the Plzeňský kraj region of the Czech Republic. The plant serves a population of approximately 1,320 residents and has a designed capacity of 2,500 m³/day, with an average discharge volume of 339.73 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. The directive mandates secondary treatment for populations between 2,000 and 10,000, and while Chlumcany falls below that threshold, the plant's secondary treatment ensures compliance with national standards for organic matter and suspended solids removal. The treated effluent is discharged into local waterways that ultimately drain into the Berounka River, a tributary of the Vltava River, which flows into the Elbe River and eventually reaches the North Sea. This connection highlights the plant's role in protecting downstream aquatic ecosystems, including the Elbe's diverse fish populations and migratory bird habitats.

The plant's discharge enters the local watershed, which feeds into the Berounka River, a key tributary of the Vltava River. The Vltava flows through Prague and joins the Elbe, which empties into the North Sea. This downstream chain supports diverse aquatic life, including salmonid species in the upper reaches and migratory fish in the Elbe estuary. The plant's secondary treatment helps reduce nutrient and organic loads, mitigating eutrophication risks in the receiving waters.