Unna Hemmerde Wastewater Treatment Plant, Unna, Nordrhein-Westfalen

Unna Hemmerde is a wastewater treatment plant located in the Hemmerde district of Unna, in the state of Nordrhein-Westfalen, Germany. The plant serves a population of approximately 6,360 residents, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive (91/271/EEC). The facility is situated inland, away from coastal areas, and its operations are integrated into the regional water management infrastructure of the Ruhr basin. As a German wastewater treatment plant serving a population under 10,000, Unna Hemmerde is subject to the requirements of the EU Urban Waste Water Treatment Directive, which mandates appropriate treatment based on the sensitivity of the receiving waters. For small agglomerations in inland areas, secondary treatment is typically required to reduce organic matter and suspended solids. The plant's treatment processes are designed to meet national standards set by the German Water Resources Act (Wasserhaushaltsgesetz) and state-level regulations. The treated effluent from Unna Hemmerde is discharged into local watercourses that ultimately drain into the Lippe River, a tributary of the Rhine. The Rhine basin is one of Europe's most important river systems, supporting diverse aquatic life and providing water for agriculture, industry, and drinking water. The plant plays a key role in protecting the water quality of these downstream environments by ensuring that pollutants are removed before discharge.

The Unna Hemmerde plant discharges into local streams that flow into the Lippe River, which eventually joins the Rhine River. The Rhine basin is a major European watershed that supports diverse ecosystems, including fish populations such as salmon and eel. The plant's treatment helps maintain water quality in this ecologically sensitive river system, which is also used for drinking water abstraction and recreation downstream.