UESSLINGEN Wastewater Treatment Plant, Uesslingen-Buch, Thurgau, Switzerland

The UESSLINGEN wastewater treatment plant is located in Uesslingen-Buch, a municipality in the canton of Thurgau, Switzerland. It serves a population of approximately 1,175 residents, classifying it as a small-scale facility within the Swiss wastewater infrastructure. The plant is situated inland, more than 10 km from the coast, and discharges into local water bodies that ultimately drain into the Rhine River basin. The plant operates with secondary treatment, which is the standard level required under Swiss regulations for agglomerations of this size. Switzerland's water protection legislation, based on the Federal Water Protection Act (GSchG), mandates secondary treatment for all wastewater plants to reduce organic load and protect receiving waters. The designed capacity of 1,250 m³/day indicates the facility is sized to handle peak flows, with a current discharge volume of 533.36 m³/day reflecting typical operational levels. The treated effluent from UESSLINGEN is discharged into nearby streams that flow into the Thur River, a tributary of the Rhine. The Rhine ultimately drains into the North Sea. This plant plays a key role in protecting the local aquatic ecosystem, including the Thur River, which supports diverse fish populations and serves as an important corridor for migratory species. By maintaining secondary treatment standards, the facility helps prevent nutrient pollution and safeguards water quality in the downstream environment.

The plant discharges into local watercourses that feed the Thur River, a major tributary of the Rhine. The Rhine basin is ecologically significant, supporting diverse aquatic life and providing habitat for species such as salmon and eel. The Thur River itself is a regulated waterway that flows through agricultural and urban areas, making nutrient control critical to prevent eutrophication in downstream lakes and the Rhine delta.