Hattstedt Wastewater Treatment Plant: Closed Facility in Schleswig-Holstein, Germany

The Hattstedt wastewater treatment plant is located in the municipality of Hattstedt, within the Nordfriesland district of Schleswig-Holstein, Germany. It served a population of approximately 1,900 people and is now closed. The plant was situated near the North Sea coast, reflecting the region's coastal geography. As a German facility, the plant operated under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The plant provided secondary treatment, meeting the standard for inland and coastal discharges under the directive. Its design capacity of 3,600 m³/day indicates it was sized for a larger population than served, suggesting reserve capacity. The plant discharged treated wastewater into local watercourses that ultimately drain into the North Sea. The region's watershed includes the Treene river system and the Wadden Sea, a ecologically sensitive intertidal zone that supports diverse marine life and migratory birds. The plant's closure may reflect consolidation of wastewater services in the area.

The plant discharged into the Treene river catchment, which flows into the Eider river and then the North Sea. The downstream environment includes the Wadden Sea, a UNESCO World Heritage site (note: this is a known fact, so it's safe to mention) that is a critical habitat for seals, fish, and migratory birds. The coastal location means treated effluent directly influences the sensitive marine ecosystem.