Overview
Au Rosenbergsau wastewater treatment plant serves Heerbrugg, Switzerland, in the St. Gallen canton. It treats wastewater for approximately 59,770 people and is located within 50 km of the coast.
Au Rosenbergsau is a wastewater treatment plant located in Heerbrugg, within the municipality of Au in the St. Gallen canton of Switzerland. The plant serves a population of approximately 59,770 people, placing it in the medium-to-large agglomeration category under Swiss and EU regulatory frameworks. Its location near the Rhine Valley positions it within a region known for its industrial and agricultural activities. As a Swiss plant, Au Rosenbergsau operates under the Swiss Water Protection Act (Gewässerschutzgesetz), which mandates stringent treatment standards. For agglomerations of this size, secondary treatment with nutrient removal is typically required to protect sensitive water bodies. The plant's designed capacity is 1.00 (likely in million cubic meters per year or similar unit), indicating a substantial infrastructure investment. Swiss regulations generally ensure advanced treatment for plants serving over 10,000 people. The treated effluent from Au Rosenbergsau likely discharges into a local watercourse that flows into the Rhine River, which ultimately drains into the North Sea. The Rhine is a major European waterway supporting diverse aquatic life and providing drinking water for millions. The plant plays a crucial role in maintaining water quality in this ecologically significant basin, particularly given the industrial and urban pressures in the region.
Environmental context
The plant's treated effluent likely enters a tributary of the Rhine River, which flows through Switzerland, Germany, and the Netherlands before reaching the North Sea. The Rhine basin supports a wide range of aquatic species, including salmonids and migratory fish, and is a vital water resource for multiple countries. The plant's location within 50 km of the coast means its discharge contributes to the overall nutrient load entering the North Sea, a water body sensitive to eutrophication. Swiss regulations require advanced treatment to minimize such impacts.
Frequently asked questions
Au Rosenbergsau is located in Heerbrugg, within the municipality of Au in the St. Gallen canton of Switzerland. The full address is Espenstrasse, Heerbrugg, Au (SG), Wahlkreis Rheintal, St. Gallen, 9435.
The plant serves approximately 59,770 people, classifying it as a medium-to-large agglomeration under Swiss and EU wastewater treatment standards.
The treated effluent is likely discharged into a local watercourse that flows into the Rhine River, which eventually reaches the North Sea. The plant is within 50 km of the coast.
The plant operates under the Swiss Water Protection Act (Gewässerschutzgesetz), which sets strict standards for wastewater treatment. For plants serving over 10,000 people, secondary treatment with nutrient removal is typically required to protect sensitive water bodies like the Rhine.
In Switzerland, plants serving agglomerations of this size are generally required to provide secondary biological treatment with phosphorus and nitrogen removal. This aligns with the EU Urban Waste Water Treatment Directive's standards for sensitive areas, which Switzerland largely follows.
Nearby plants