Furstenstein Wastewater Treatment Plant, Neukirchen vorm Wald, Bayern

Furstenstein is a municipal wastewater treatment plant located in Neukirchen vorm Wald, in the Landkreis Passau district of Bayern, Germany. The facility serves a population of 2,638 and operates under the regulatory framework of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this scale. The plant provides secondary treatment, meeting the standard required for inland freshwater discharge under the EU directive. With a designed capacity of 4,000 m³/day and an average daily discharge of 586.95 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local watercourses that ultimately drain into the Danube River basin, contributing to the Black Sea watershed. The plant plays a key role in protecting the region's aquatic ecosystems by reducing organic load and nutrients before release.

The plant discharges into small streams that feed into the Danube River system, which flows through Central and Eastern Europe before reaching the Black Sea. The local watershed supports diverse aquatic life and is part of a larger ecological network. The secondary treatment process helps reduce biochemical oxygen demand and suspended solids, protecting downstream habitats from eutrophication and oxygen depletion.