Lengerich Wastewater Treatment Plant, Nordrhein-Westfalen, Germany

The Lengerich wastewater treatment plant is located in the town of Lengerich, in the Kreis Steinfurt district of Nordrhein-Westfalen, Germany. Serving a population of approximately 35,800, the plant is part of the region's municipal wastewater infrastructure, handling domestic and industrial flows from the community. As a German facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations with a population equivalent (PE) between 10,000 and 150,000. For plants serving over 35,000 PE, the directive also mandates tertiary treatment if the receiving waters are designated as sensitive areas. The plant's treatment processes are designed to meet these regulatory standards, ensuring compliance with national and European water quality requirements. The treated effluent from the Lengerich plant is discharged into local watercourses that ultimately drain into the Ems River basin. The Ems flows northward through Lower Saxony before reaching the North Sea. This watershed supports diverse aquatic life and is an important ecological corridor in the region. The plant's operations help protect downstream water quality and the broader North Sea ecosystem.

The Lengerich plant discharges into the local tributaries of the Ems River, which flows through Nordrhein-Westfalen and Lower Saxony before emptying into the North Sea. The Ems basin supports a variety of freshwater and estuarine habitats, including wetlands and floodplains that provide critical spawning and nursery grounds for fish. The plant's treatment performance is essential for maintaining the ecological health of this river system and the downstream coastal environment.