Overview
Mundaun Flond is a secondary treatment plant in Obersaxen-Mundaun, Graubünden, Switzerland, serving 256 people. It discharges 116.20 m³/day of treated wastewater into the local watershed.
Mundaun Flond is a municipal wastewater treatment plant located in the village of Flond, part of the Obersaxen-Mundaun municipality in the Surselva region of Graubünden, Switzerland. The plant serves a small population of 256 residents, reflecting the rural and alpine character of the area. The plant provides secondary treatment, which is the standard biological treatment stage required under Swiss wastewater regulations for communities of this size. With a designed capacity of 600 m³/day, the plant operates well below its capacity, treating an average of 116.20 m³/day. Swiss federal water protection law (Gewässerschutzgesetz) mandates that all wastewater receive at least secondary treatment before discharge, and Mundaun Flond complies with this requirement. Treated effluent from the plant is discharged into a local stream that flows into the Rhine River system, ultimately reaching the North Sea. The plant plays a key role in protecting the sensitive alpine aquatic ecosystems of the Surselva valley, which support diverse fish populations and are important for regional biodiversity.
Environmental context
The plant discharges into a small tributary of the Vorderrhein (Anterior Rhine), which joins the Hinterrhein to form the Rhine River. The Rhine flows through Lake Constance and eventually into the North Sea. The local watershed is characterized by alpine streams with high water quality, supporting brown trout and other cold-water species. The plant's secondary treatment helps maintain the ecological integrity of these sensitive mountain waters.
Frequently asked questions
Mundaun Flond is located in the village of Flond, part of the Obersaxen-Mundaun municipality in the Surselva district of Graubünden, Switzerland.
The plant provides secondary treatment, which includes biological processes to remove organic matter and nutrients, meeting Swiss standards for wastewater treatment.
Treated effluent is discharged into a local stream that flows into the Vorderrhein (Anterior Rhine), part of the Rhine River basin, eventually reaching the North Sea.
The plant operates under the Swiss Federal Water Protection Act (Gewässerschutzgesetz), which requires secondary treatment for all wastewater discharges to protect water quality.
For small communities in Switzerland, secondary treatment is standard, often using activated sludge or trickling filter systems, with disinfection if required for sensitive receiving waters.
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