Oldendorf Wastewater Treatment Plant, Krummendiek, Schleswig-Holstein

Oldendorf is a former wastewater treatment plant located in Krummendiek, a municipality in the Steinburg district of Schleswig-Holstein, Germany. The plant served a small population of 1,124 people and had a designed capacity of 2,000 cubic meters per day, with an average discharge volume of 284.46 cubic meters per day. As a German plant, it 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 directive's standards for smaller communities. The facility is now closed, and wastewater management has likely been consolidated to a larger regional plant. The plant discharged treated wastewater into local watercourses within the Elbe River basin, which ultimately drains into the North Sea. The region's aquatic ecosystems benefit from the treatment standards that protect water quality and support biodiversity in the downstream environment.

The plant discharged into small streams within the Elbe River basin, which flows into the North Sea. The watershed supports diverse aquatic life and is part of a region with sensitive coastal ecosystems. Proper treatment helps prevent nutrient loading and protects the ecological balance of the downstream estuary and marine environment.