Grossgarnstadt Wastewater Treatment Plant, Bayern, Germany

The Grossgarnstadt wastewater treatment plant is located in Großgarnstadt, a locality in the municipality of Ebersdorf bei Coburg, in the Bavarian district of Landkreis Coburg, Germany. It served a population of approximately 1,100 people, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). The plant is now closed. As a secondary treatment facility, Grossgarnstadt provided biological treatment to reduce organic matter and suspended solids, meeting the EU UWWTD requirements for small agglomerations in normal areas. The plant had a designed capacity of 1,400 m³/day, with an average discharge volume of 278.38 m³/day, indicating a low utilization rate prior to closure. The plant's treated effluent was discharged into the local watershed, which ultimately drains into the Main River via the Itz River system. The Main River flows into the Rhine, one of Europe's major waterways, supporting diverse aquatic ecosystems and providing drinking water for millions. The closure of this plant likely means wastewater is now treated at a larger regional facility, improving overall treatment efficiency and environmental protection.

The plant discharged into the Itz River basin, a tributary of the Main River, which flows into the Rhine. The Rhine is a critical European waterway supporting diverse fish species, including salmon and eel, and provides drinking water for over 20 million people. The region's watershed is ecologically sensitive, with agricultural runoff and urban pressures affecting water quality. The plant's secondary treatment helped reduce nutrient loads, protecting downstream habitats from eutrophication.