Prackenbach Wastewater Treatment Plant, Krailing, Bavaria, Germany

Prackenbach wastewater treatment plant is located in Krailing, a district of Prackenbach in the Bavarian region of Germany. The plant served a population of 1,754 people, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive (91/271/EEC). The facility is now closed. The plant provided secondary treatment, which is the minimum standard required by the EU UWWTD for freshwater discharges from agglomerations of this size. With a designed capacity of 1,900 m³/day and an average discharge volume of 443.90 m³/day, the plant operated well below its capacity. As a German facility, it was subject to the national Wasserhaushaltsgesetz (Water Resources Act) and the Abwasserverordnung (Wastewater Ordinance), which implement EU directives. The treated effluent was discharged into a local water body that ultimately drains into the Danube River basin via the Regen River. The Danube flows through several Central and Eastern European countries before reaching the Black Sea. The plant's operation contributed to protecting the water quality of the Regen River and downstream ecosystems.

The plant discharged into a tributary of the Regen River, which flows into the Danube near Regensburg. The Danube is Europe's second-longest river, supporting diverse aquatic life and providing water for millions of people. The Regen River valley is ecologically sensitive, with habitats for fish species like brown trout and grayling. Downstream, the Danube Delta is a major wetland ecosystem. The plant's secondary treatment helped reduce organic pollution and protect these waters.