COV Čerčany Wastewater Treatment Plant, Čerčany, Czech Republic

COV Čerčany is a municipal wastewater treatment plant located in Čerčany, a town in the Benešov District of the Central Bohemian Region, Czech Republic. The facility serves approximately 5,300 residents, placing it in the small-to-medium agglomeration category under Czech and EU regulations. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size in non-sensitive areas. The plant has a designed capacity of 2,350 m³/day and currently treats an average daily volume of about 472 m³, indicating ample reserve capacity for future growth. Treated wastewater from COV Čerčany is discharged into local streams that eventually flow into the Sázava River, a tributary of the Vltava River, which joins the Elbe River before reaching the North Sea. The plant plays a key role in protecting the water quality of these rivers and the downstream aquatic ecosystems.

The plant discharges into the Sázava River watershed, which flows through the Central Bohemian Uplands and supports diverse aquatic life, including fish species such as brown trout and grayling. The Sázava joins the Vltava, which drains into the Elbe and ultimately the North Sea. The region's moderate climate and forested landscape contribute to seasonal flow variations, making consistent treatment important for maintaining ecological balance.