COV Marianske Lazne Wastewater Treatment Plant, Mariánské Lázně, Czech Republic

COV Marianske Lazne is a municipal wastewater treatment plant located in Mariánské Lázně, a spa town in the Karlovarský kraj region of the Czech Republic. The facility serves a population of around 19,165, placing it in the medium agglomeration category under EU classification. As a Czech plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The directive also mandates more stringent treatment if the receiving waters are designated as sensitive areas. The plant's treatment process and capacity details are not publicly available, but the regulatory framework ensures compliance with EU standards. The treated effluent is discharged into local watercourses that ultimately drain into the North Sea via the Elbe River basin. The plant plays a key role in protecting the region's water quality, particularly given the ecological sensitivity of the surrounding landscape, which supports diverse aquatic life and is part of a broader migratory corridor.

The plant discharges into local streams that flow into the Ohře River, a tributary of the Elbe River, which drains into the North Sea. The surrounding watershed supports diverse aquatic ecosystems and is important for migratory fish species. The region's spa culture relies on clean water, making effective wastewater treatment critical for both environmental and economic sustainability.