Reischach Wastewater Treatment Plant, Reischach, Bayern

The Reischach wastewater treatment plant is located in the municipality of Reischach, in the Landkreis Altötting district of Bayern, Germany. It served a population of approximately 1,900 people, classifying it as a small agglomeration under German and EU regulations. The plant is now closed, but during its operation it provided advanced treatment, which exceeds the secondary treatment standard required by the EU Urban Waste Water Treatment Directive for plants of this size. As an advanced treatment facility, Reischach likely employed processes such as biological nutrient removal or chemical precipitation to reduce nitrogen and phosphorus loads. The plant had a designed capacity of 3,000 cubic meters per day, with an average discharge volume of about 484 cubic meters per day, indicating it operated well below capacity. Under the EU UWWTD, small agglomerations like this are typically required to provide appropriate treatment based on the sensitivity of the receiving waters. The plant's treated effluent was discharged into a local water body that drains into the Inn River, a major tributary of the Danube. The Danube ultimately flows into the Black Sea, making this plant part of a large international river basin. Advanced treatment helps protect downstream ecosystems, including the Danube Delta, a region of high ecological value that supports diverse aquatic life and migratory bird populations.

The plant discharged into a small stream within the Danube basin, which flows via the Inn River to the Danube and eventually the Black Sea. The downstream environment includes ecologically sensitive areas such as floodplain forests and wetlands that support diverse aquatic species. Advanced treatment at this plant helped reduce nutrient loads, protecting water quality in the broader Danube catchment.