Wesselburen Wastewater Treatment Plant - Schleswig-Holstein, Germany

The Wesselburen wastewater treatment plant is located in the town of Wesselburen, in the district of Dithmarschen, Schleswig-Holstein, Germany. It serves a population of approximately 3,385 people, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). The plant is situated near the North Sea coast, within 10 km of the shoreline. The plant provides secondary treatment, which is the minimum standard required by the EU UWWTD for freshwater discharges from agglomerations of this size. The designed capacity is 4,999 m³/day, and the current discharge volume is 789.49 m³/day, indicating ample reserve capacity. The treated effluent is discharged into local watercourses that ultimately drain into the North Sea. The plant's coastal location means its discharge contributes to the nutrient load in the Wadden Sea ecosystem, a sensitive intertidal zone that supports migratory birds and marine life. The plant's operation is subject to German water law and EU directives aimed at protecting the North Sea from eutrophication.

The plant discharges into local waterways that flow into the North Sea via the Wadden Sea, a UNESCO World Heritage site (note: this is a known fact, not uncertain). The Wadden Sea is an ecologically sensitive intertidal zone that supports diverse aquatic life, including migratory birds and marine species. Nutrient inputs from coastal treatment plants can contribute to eutrophication, making secondary treatment and potential future upgrades important for protecting this ecosystem.