Mitterkirchen Wastewater Treatment Plant - Oberösterreich, Austria

The Mitterkirchen wastewater treatment plant is located in the town of Mitterkirchen im Machland, within the Bezirk Perg district of Oberösterreich, Austria. This facility serves a population of approximately 1,205 residents, reflecting its role as a small-scale municipal treatment plant in a rural setting. The plant employs advanced treatment processes, which go beyond the secondary treatment standards required by the EU Urban Waste Water Treatment Directive (91/271/EEC). With a designed capacity of 2,650 m³/day and a current discharge volume of 409.66 m³/day, the plant operates well within its capacity, ensuring effective treatment of wastewater from the local community. The treated effluent is discharged into the local watershed, which ultimately drains into the Danube River basin. The plant's advanced treatment helps protect the water quality of downstream water bodies, supporting aquatic life and maintaining the ecological balance of the region's waterways.

The plant discharges into the Danube River basin, which flows through Austria and several other countries before reaching the Black Sea. The Danube is a major European waterway supporting diverse aquatic ecosystems, including fish species such as sturgeon and migratory birds. Advanced treatment at this plant helps reduce nutrient loads and pollutants, contributing to the ecological health of the river and its downstream environments.