ST MARTIN_VILLAGE Wastewater Treatment Plant, Saint-Martin, Valais, Switzerland

ST MARTIN_VILLAGE is an advanced wastewater treatment plant located in Saint-Martin (VS), a municipality in the Hérens district of Valais, Switzerland. The plant serves a population of 1,670 and has a designed capacity of 2,400 m³/day, with a current discharge volume of 758.05 m³/day, indicating ample reserve capacity. As an advanced treatment facility, it goes beyond secondary treatment to remove nutrients such as nitrogen and phosphorus, which is typical for plants in sensitive Alpine watersheds. Switzerland's wastewater regulations align with the EU Urban Waste Water Treatment Directive, requiring advanced treatment for agglomerations discharging into sensitive areas like the Rhône basin. The plant's treated effluent likely discharges into a local stream that feeds into the Rhône River, which flows through the Valais valley into Lake Geneva and ultimately the Mediterranean Sea. This watershed supports diverse aquatic life and is ecologically sensitive due to Alpine runoff and tourism pressures.

The plant is situated in the Rhône River basin, with treated effluent likely entering a tributary of the Rhône. The Rhône flows through the Valais valley, passes through Lake Geneva, and continues to the Mediterranean Sea. This Alpine watershed is ecologically sensitive, supporting diverse aquatic species and serving as a critical water resource for agriculture and tourism.