Overview
Oberriet wastewater treatment plant serves Montlingen in St. Gallen, Switzerland, with a designed capacity of 1.00 and a population equivalent of 12,054.
The Oberriet wastewater treatment plant is located in Montlingen, within the municipality of Oberriet in the canton of St. Gallen, Switzerland. It serves a population equivalent of 12,054, placing it in the medium agglomeration category under Swiss and EU regulatory frameworks. As a Swiss plant, Oberriet operates under the Swiss Water Protection Act (Gewässerschutzgesetz), which mandates advanced treatment standards. For agglomerations of this scale, secondary treatment with nutrient removal is typically required to protect sensitive water bodies. The treated effluent from Oberriet ultimately discharges into the Rhine River basin via local tributaries. The Rhine is a major European waterway that flows into the North Sea, supporting diverse aquatic ecosystems and serving as a critical water resource for multiple countries. The plant's location within 50 km of the coast underscores its role in protecting downstream environments.
Environmental context
The Oberriet plant discharges into the Rhine River basin, which flows through Switzerland, Germany, and the Netherlands before reaching the North Sea. The Rhine supports a rich diversity of fish, invertebrates, and migratory birds, and is an important corridor for aquatic species. Nutrient loading from wastewater can contribute to eutrophication in downstream lakes and coastal zones, making advanced treatment essential for ecological health.
Frequently asked questions
The Oberriet wastewater treatment plant is located in Montlingen, within the municipality of Oberriet in the canton of St. Gallen, Switzerland. Its address is 9 Hilpertstrasse, Eichenwies, Montlingen.
The Oberriet wastewater treatment plant serves a population equivalent of 12,054, classifying it as a medium-sized agglomeration under Swiss and EU regulatory standards.
The treated wastewater from Oberriet is discharged into local tributaries that flow into the Rhine River basin, ultimately reaching the North Sea.
The Oberriet plant operates under the Swiss Water Protection Act (Gewässerschutzgesetz), which requires advanced treatment for agglomerations of this size to protect water quality in the Rhine basin.
In Switzerland, wastewater treatment plants serving around 12,000 people typically provide secondary treatment with nutrient removal to meet strict effluent standards, especially when discharging into sensitive water bodies like the Rhine.
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