Flawil Oberglatt Wastewater Treatment Plant, Flawil, St. Gallen, Switzerland

Flawil Oberglatt is a wastewater treatment plant located in Flawil, in the canton of St. Gallen, Switzerland. It serves a population of around 19,555, placing it in the medium agglomeration category. The plant is situated in the Glatt valley, an area characterized by rolling hills and agricultural land. As a Swiss facility, Flawil Oberglatt operates under the Swiss Water Protection Act (Gewässerschutzgesetz), which mandates advanced treatment for plants serving over 10,000 people. This typically includes biological treatment with nutrient removal to protect sensitive water bodies. The plant's designed capacity is 1.00 (likely in thousands of cubic meters per day), indicating it is sized to handle the local wastewater load. The treated effluent from Flawil Oberglatt is discharged into the local water system, which drains into the Glatt River and eventually into the Rhine River basin. The Rhine is a major European waterway that flows into the North Sea. The plant plays a key role in maintaining water quality in the region, supporting aquatic life and downstream ecosystems.

Flawil Oberglatt discharges treated wastewater into the Glatt River, a tributary of the Thur River, which flows into the Rhine River. The Rhine basin is ecologically significant, supporting diverse fish species and migratory birds. The plant's nutrient removal helps prevent eutrophication in downstream lakes and the North Sea.