Warth Wastewater Treatment Plant | Vorarlberg, Austria

Warth wastewater treatment plant is located in the municipality of Warth, Bezirk Bregenz, Vorarlberg, Austria. This facility serves a population of approximately 1,422 residents and is part of the region's wastewater infrastructure in the Alpine setting. 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 agglomerations of this size. With a designed capacity of 5,000 m³/day and a current discharge volume of 293.15 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 Rhine River basin, flowing northward to the North Sea. The advanced treatment helps protect the sensitive Alpine streams and downstream ecosystems, including the Rhine delta and the Wadden Sea, a critical habitat for migratory birds and marine life.

The plant discharges into small streams in the Bregenz Forest region, which feed into the Bregenzer Ach river, a tributary of Lake Constance (Bodensee). Lake Constance drains via the High Rhine to the North Sea. The advanced treatment ensures minimal nutrient loading, protecting the lake's drinking water quality and the downstream Rhine ecosystem, which supports diverse aquatic life and migratory fish species.