KA Varrel Wastewater Treatment Plant, Varrel, Niedersachsen, Germany

KA Varrel (2514042016) was a municipal wastewater treatment plant located in Varrel, a village in the Samtgemeinde Kirchdorf, Landkreis Diepholz, Niedersachsen, Germany. The plant served a population of approximately 1,757 people and had a designed capacity of 2,500 m³ per day, with an average discharge volume of 444.65 m³ per day. As a secondary treatment facility, KA Varrel provided biological treatment to remove organic matter and suspended solids. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations between 2,000 and 10,000 population equivalent are required to have secondary treatment, though this plant served fewer than 2,000 people. The plant is now closed, and its wastewater is likely diverted to a neighboring facility. The plant's treated effluent was discharged into local watercourses within the Weser river basin, which ultimately drains into the North Sea. The surrounding area is rural and agricultural, with small streams feeding into the Große Aue, a tributary of the Weser. The closure of this plant may have implications for local water quality management.

The plant discharged into the Weser river basin, which flows through Niedersachsen into the North Sea. The Weser supports diverse aquatic life and is an important migratory corridor for fish species. The surrounding area is characterized by agricultural land use, and the local streams are sensitive to nutrient inputs. The closure of the plant may reduce local nutrient loads but requires alternative treatment arrangements for the served population.