ANDELFINGEN Wastewater Treatment Plant, Andelfingen, Zürich, Switzerland

The ANDELFINGEN wastewater treatment plant is located in Andelfingen, a municipality in the canton of Zürich, Switzerland. The facility serves a population of approximately 6,942 people, making it a small to medium-sized agglomeration under Swiss water management standards. The plant is situated in the rural Zurich Wine Country region, along the Thur River valley. Switzerland's wastewater treatment plants operate under the Swiss Water Protection Act (Gewässerschutzgesetz), which mandates advanced treatment for all plants discharging into sensitive water bodies. For agglomerations of this scale, secondary treatment with nutrient removal is typically required to meet stringent effluent quality standards. The plant's designed capacity is 1.00 (likely in thousand cubic meters per day or similar units), indicating a modest infrastructure tailored to the local population. The treated effluent from the ANDELFINGEN plant is discharged into the Thur River, a major tributary of the Rhine. The Thur flows through the canton of Zürich before joining the Rhine near Koblenz, Switzerland. The Rhine then continues through Germany and the Netherlands into the North Sea. The plant plays a key role in protecting the Thur River's water quality, which supports diverse aquatic life and is used for recreation and agriculture in the region.

The ANDELFINGEN plant discharges into the Thur River, which flows into the Rhine and ultimately the North Sea. The Thur River watershed is ecologically sensitive, supporting fish species such as brown trout and grayling, and is a vital corridor for migratory birds. The plant's treatment helps maintain water quality in this important river system, which is subject to Swiss and EU water quality standards.