Pornbach Wastewater Treatment Plant, Pörnbach, Bavaria | Germany

The Pornbach wastewater treatment plant is located in the town of Pörnbach, in the Bavarian district of Pfaffenhofen an der Ilm, Germany. It served a population equivalent of approximately 1,803 people, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). The plant is currently closed and no longer operational. The plant provided advanced treatment, which goes beyond the secondary treatment standard required by the EU UWWTD for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive water bodies. The plant had a designed capacity of 4,999 m³/day and an average discharge volume of 456.30 m³/day, indicating it operated well below capacity. The treated effluent was discharged into the local watershed, which ultimately drains into the Danube River basin via the Ilm River. The Danube flows into the Black Sea, making this plant part of a large international river system. The advanced treatment level helped protect downstream aquatic ecosystems from eutrophication and other pollution impacts.

The Pornbach plant discharged into the Ilm River, a tributary of the Danube, which flows through Bavaria and eventually into the Black Sea. The Danube basin supports diverse aquatic life and is an important ecological corridor in Europe. Advanced treatment at this plant helped reduce nutrient loads that could otherwise contribute to algal blooms and oxygen depletion in downstream waters.