Pretzier Wastewater Treatment Plant, Salzwedel, Saxony-Anhalt, Germany

The Pretzier wastewater treatment plant is located in the village of Pretzier, part of the city of Salzwedel in Saxony-Anhalt, Germany. It serves a population of approximately 1,647 people, making it a small-scale municipal facility. The plant is situated in the Altmarkkreis Salzwedel district, a rural area in northern Saxony-Anhalt. The plant operates with secondary treatment, which is the standard biological treatment stage required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The directive mandates secondary treatment for all discharges from agglomerations with a population equivalent (PE) between 2,000 and 10,000, and Pretzier's population of 1,647 falls below this threshold, yet the plant still provides secondary treatment. The designed capacity of 3,100 units indicates the plant has room for growth. The treated effluent from the plant is discharged into the local water system, which ultimately drains into the Jeetzel River, a tributary of the Elbe River. The Elbe flows into the North Sea, making this plant part of the Elbe basin. The surrounding region is characterized by agricultural land and small settlements, and the plant plays a key role in protecting local water quality and the downstream aquatic environment.

The Pretzier plant discharges into the Jeetzel River, which flows into the Elbe River and eventually reaches the North Sea. The Elbe basin supports diverse aquatic life, including fish species such as salmon and eel, and is an important migratory corridor. The plant's secondary treatment helps reduce organic pollution and nutrient loads, protecting the ecological health of the Jeetzel and downstream waters.