Overview
OBERES SIHLTAL wastewater treatment plant serves Einsiedeln, Schwyz, Switzerland, treating wastewater from approximately 9,000 residents. The plant operates under Swiss water protection regulations.
OBERES SIHLTAL is a wastewater treatment plant located in Einsiedeln, in the canton of Schwyz, Switzerland. It serves a population of approximately 9,041 people, making it a medium-sized facility within the Swiss wastewater infrastructure. The plant is situated in the Alpine foothills, an area known for its pristine water resources and strict environmental standards. Switzerland's water protection legislation, particularly the Waters Protection Act (GSchG), mandates that all wastewater treatment plants must meet high treatment standards to protect the country's lakes and rivers. For agglomerations of this size, secondary treatment with nutrient removal is typically required, ensuring that discharged water meets stringent quality criteria before being released into the environment. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Sihl River and then into Lake Zurich. This water body is ecologically sensitive, supporting diverse aquatic life and serving as a source of drinking water for the region. The plant plays a crucial role in maintaining the water quality of this important alpine ecosystem.
Environmental context
OBERES SIHLTAL discharges into the Sihl River, a tributary of the Limmat River, which flows into the Rhine River and eventually the North Sea. The Sihl River and Lake Zurich are ecologically sensitive, supporting diverse aquatic life and providing drinking water for the Zurich metropolitan area. The plant's operations are critical for protecting these water bodies from nutrient pollution and maintaining their ecological integrity.
Frequently asked questions
OBERES SIHLTAL is located in Einsiedeln, in the canton of Schwyz, Switzerland, at Rütistrasse.
The plant serves approximately 9,041 people, classifying it as a medium-sized agglomeration under Swiss water protection regulations.
Treated wastewater from OBERES SIHLTAL is discharged into the Sihl River, which flows into the Limmat River and then the Rhine, eventually reaching the North Sea.
The plant operates under Switzerland's Waters Protection Act (GSchG), which requires secondary treatment with nutrient removal for agglomerations of this size to protect sensitive water bodies.
For agglomerations around 9,000 PE, Swiss regulations typically mandate secondary biological treatment with phosphorus removal to meet strict effluent standards for discharge into alpine rivers and lakes.
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