Schweich GKA Riol Wastewater Treatment Plant, Longuich, Rhineland-Palatinate

Schweich GKA Riol is a wastewater treatment plant located in Longuich, near Schweich an der Römischen Weinstraße, in the Trier-Saarburg district of Rhineland-Palatinate, Germany. The plant serves a population of approximately 39,291, classifying it as a medium-sized agglomeration under EU regulations. As a German facility, the plant is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for inland plants serving between 10,000 and 150,000 population equivalents. The plant's treatment processes are designed to meet these standards, ensuring compliance with national water quality goals. The treated effluent is discharged into the local watershed, which ultimately drains into the Moselle River, a tributary of the Rhine. The Moselle flows through the wine-growing region of Rhineland-Palatinate before joining the Rhine at Koblenz. The plant plays a key role in protecting the Moselle's water quality, supporting aquatic life and downstream ecosystems.

The plant discharges into the Moselle River basin, which flows through the Rhine Valley and eventually into the North Sea. The Moselle is an ecologically sensitive river that supports diverse fish populations, including salmonids, and is an important corridor for migratory species. The plant's treatment helps maintain water quality in this region, which is also known for its vineyards and tourism.