Muhlacker Muhlhausen Wastewater Treatment Plant, Mühlacker, Germany

Muhlacker Muhlhausen is a wastewater treatment plant located in Mühlacker, Baden-Württemberg, Germany. The plant served a population of 1,100 and had a designed capacity of 2,000 m³/day. It is currently closed. The plant provided secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The directive mandates secondary treatment for populations between 2,000 and 10,000, and more stringent treatment for sensitive areas. The plant's discharge volume was 278.38 m³/day. The treated effluent was discharged into the local water system, which ultimately drains into the Enz River, a tributary of the Neckar River, and then into the Rhine River. The Rhine basin supports diverse aquatic life and is an important ecological corridor in Europe.

The plant discharged into the Enz River, which flows into the Neckar River and then the Rhine River. The Rhine basin is a major European watershed supporting diverse aquatic ecosystems and migratory fish species. The plant's location inland, away from the coast, reduces direct marine impact, but its discharge contributed to the nutrient load in the river system.