ATTELWIL Wastewater Treatment Plant, Attelwil, Aargau, Switzerland

ATTELWIL is a wastewater treatment plant located in Attelwil, a village in the canton of Aargau, Switzerland. It serves a population of about 2,825 residents, making it a small-scale municipal facility. The plant is situated in the Suhre River catchment area, which flows into the Aare River and ultimately the Rhine. Switzerland's Water Protection Act (GSchG) and its ordinances set stringent standards for wastewater treatment. For small agglomerations like Attelwil, secondary treatment with nutrient removal is typically required to protect sensitive water bodies. The plant's design and operation align with these national standards, ensuring compliance with Swiss environmental law. The treated effluent from ATTELWIL is discharged into local watercourses that drain into the Suhre River. The Suhre flows into the Aare, a major tributary of the Rhine. This river system supports diverse aquatic life and is an important corridor for fish migration. The plant's treatment helps maintain water quality in this ecologically significant watershed.

The plant discharges into the Suhre River catchment, which flows into the Aare River and then the Rhine. This watershed supports diverse aquatic ecosystems, including fish species such as brown trout and grayling. The Rhine is a major European waterway, and maintaining water quality here is critical for downstream habitats and biodiversity.