Ternberg Wastewater Treatment Plant, Oberösterreich, Austria

The Ternberg wastewater treatment plant is located in the municipality of Ternberg, Bezirk Steyr-Land, in the state of Oberösterreich, Austria. It serves a population of approximately 2,756 residents, classifying it as a small agglomeration under Austrian and EU wastewater regulations. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for inland areas. With a designed capacity of 4,900 m³/day and an actual discharge volume of 472.96 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. Treated effluent is discharged into a local watercourse, which ultimately drains into the Danube River basin. The plant plays a key role in protecting the water quality of the region's rivers and downstream ecosystems, including the Danube, which supports diverse aquatic life and is an important migratory corridor for fish.

The plant discharges into a tributary of the Enns River, which flows into the Danube River. The Danube is a major European waterway that supports diverse aquatic life and provides critical habitat for migratory fish species. The advanced treatment at Ternberg helps reduce nutrient and pollutant loads, protecting downstream water quality in the Danube basin.