KA Oberndorf (3524012028) - Closed Advanced Treatment Plant in Oberndorf, Niedersachsen

KA Oberndorf (3524012028) is a former wastewater treatment plant located in Oberndorf, a municipality in the Samtgemeinde Land Hadeln, Landkreis Cuxhaven, Niedersachsen, Germany. The plant served a population of 841 and had a design capacity of 2000 m³/day, with an average discharge volume of 212.84 m³/day. It is now closed and no longer operational. The plant provided advanced treatment, which goes beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive water bodies. Although the plant is closed, its historical operation reflects Germany's commitment to high wastewater treatment standards. The plant is located within 10 km of the North Sea coast, indicating that its treated effluent likely discharged into a coastal or estuarine environment. The region is part of the Elbe-Weser triangle, with drainage ultimately reaching the North Sea. The plant's advanced treatment would have helped protect the sensitive coastal ecosystem from eutrophication.

The plant is situated in the Elbe-Weser region of Niedersachsen, less than 10 km from the North Sea coast. The treated effluent likely entered a small tributary or drainage canal that flows into the Elbe or Weser estuaries, which are ecologically important for migratory fish and bird populations. The North Sea coast in this area includes tidal flats and salt marshes that are sensitive to nutrient pollution. Advanced treatment at this plant would have reduced nitrogen and phosphorus loads, helping to prevent algal blooms and maintain water quality in the Wadden Sea ecosystem.