COV Komarov Wastewater Treatment Plant, Osek, Středočeský kraj

COV Komarov is a municipal wastewater treatment plant located in Osek, a village in the Beroun District of the Středočeský kraj region, Czech Republic. The plant serves a population of 689 and is part of the country's decentralized wastewater infrastructure for smaller agglomerations. The plant provides secondary treatment, which is the standard biological treatment stage required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 3,000 m³/day and a current discharge volume of 548.10 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local watercourses that eventually drain into the Berounka River, a tributary of the Vltava River, which flows through Prague and 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's discharge enters small streams in the Berounka River basin, which flows into the Vltava and ultimately the Elbe River, draining into the North Sea. The region is characterized by mixed agricultural and forested landscapes, and the receiving waters support diverse aquatic life, including fish species such as brown trout and grayling. Proper treatment helps prevent nutrient enrichment and maintains the ecological health of these downstream water bodies.