FOIX LABARRE Wastewater Treatment Plant, Foix, Occitanie, France

FOIX LABARRE is a wastewater treatment plant located in Foix, in the Occitanie region of southern France. The facility serves a population of approximately 1,292 people, classifying it as a small agglomeration under French and EU regulations. It is situated along the D 919 road, within the Ariège department. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Its designed capacity is 3,500 m³/day, with an actual discharge volume of 230.49 m³/day, indicating ample reserve capacity. The plant operates under France's national water law, which implements EU directives and sets stringent effluent quality standards. The treated effluent is discharged into the local watershed, which ultimately drains into the Ariège River, a tributary of the Garonne River. The Garonne flows into the Gironde estuary and then the Atlantic Ocean. The plant plays a key role in protecting the water quality of the Ariège River, which supports diverse aquatic life and is used for recreation and agriculture downstream.

The plant discharges into the Ariège River basin, which flows into the Garonne River and eventually the Gironde estuary on the Atlantic coast. The Ariège River supports a variety of fish species and is an important ecological corridor in the Pyrenees foothills. Advanced treatment helps minimize nutrient loading and protects downstream water quality in this sensitive river system.