COV Lisov Wastewater Treatment Plant, Lišov, Czech Republic

COV Lisov is a municipal wastewater treatment plant located in Lišov, in the Jihočeský kraj region of the Czech Republic. The plant serves a population of approximately 3,231, classifying it as a small agglomeration under Czech and EU regulations. It operates as a secondary treatment facility, which is the standard requirement for communities of this size under the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant has a designed capacity of 3,760 m³/day and currently discharges a daily volume of 604.4 m³, indicating significant spare capacity. As a secondary treatment plant, it employs biological processes to reduce organic matter and suspended solids, meeting the effluent standards set by Czech legislation transposing EU directives. Treated effluent from COV Lisov is discharged into local watercourses that ultimately drain into the Vltava River basin, which flows northward to join the Elbe River and eventually reaches the North Sea. The plant plays a key role in protecting the water quality of these rivers and the downstream aquatic ecosystems, including the Elbe's diverse fish populations and riparian habitats.

The plant discharges into local streams that are part of the Vltava River basin, a major tributary of the Elbe River. The Elbe flows through Germany to the North Sea, supporting diverse aquatic life and serving as an important migratory corridor for fish. The region's watershed is ecologically sensitive, with the Vltava and Elbe rivers hosting species such as the European eel and various salmonids. Secondary treatment at COV Lisov helps reduce nutrient and organic pollution, mitigating eutrophication risks in downstream water bodies.