KA Wanna Wastewater Treatment Plant, Wanna, Niedersachsen

KA Wanna is a wastewater treatment plant located in Wanna, a municipality in the Samtgemeinde Land Hadeln, Landkreis Cuxhaven, Niedersachsen, Germany. The plant served a population of 1,380 and had a designed capacity of 2,200 m³/day, with an average discharge volume of 349.24 m³/day. It is now closed. 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 to protect sensitive water bodies. As a German plant, it operated under the national Wasserhaushaltsgesetz (WHG) and Abwasserverordnung (AbwV), which set strict effluent standards. The plant's discharge likely entered local streams draining into the North Sea via the Weser or Elbe estuaries, given its proximity to the coast (within 50 km). The region's flat, low-lying terrain and agricultural land use mean that nutrient removal was important for protecting downstream coastal ecosystems.

The plant's discharge likely flowed into small streams in the Land Hadeln region, which drain into the North Sea via the Weser or Elbe estuaries. These estuaries support diverse aquatic life and are important for migratory fish and bird species. The advanced treatment level suggests the plant was designed to reduce nutrient loads, helping to prevent eutrophication in the sensitive coastal waters of the Wadden Sea, a UNESCO World Heritage site.