Sankt Englmar Wastewater Treatment Plant, Hilm, Bavaria

The Sankt Englmar wastewater treatment plant is located in the Hilm district of Sankt Englmar, in the Landkreis Straubing-Bogen region of Bavaria, Germany. It serves a population of approximately 2,267 residents, providing secondary treatment for municipal wastewater. The plant's designed capacity is 5,000 m³/day, with an average discharge volume of 997.17 m³/day, indicating it operates well below its capacity. As a German wastewater treatment facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The plant's secondary treatment level meets the directive's standards for inland areas, ensuring effective removal of organic matter and suspended solids before discharge. The treated effluent is discharged into local watercourses that eventually drain into the Danube River basin, contributing to the broader hydrological network of Bavaria. The plant plays a key role in protecting the region's water quality, supporting aquatic life in downstream rivers and streams.

The plant discharges into local streams that flow into the Danube River basin, ultimately reaching the Black Sea. The surrounding Bavarian Forest region is ecologically sensitive, with streams supporting diverse aquatic life, including fish species such as brown trout and grayling. The plant's secondary treatment helps maintain water quality in these water bodies, reducing nutrient loads and preventing eutrophication in downstream environments.