Fonsorbes 1 communale Wastewater Treatment Plant, Occitanie, France

Fonsorbes 1 communale is a municipal wastewater treatment plant located in Fonsorbes, a commune in the Haute-Garonne department of Occitanie, southern France. The plant serves a population of around 6,113 people, classifying it as a small agglomeration under EU classifications. As a French facility, the plant operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for agglomerations of this size discharging into freshwater. The plant's treatment processes and capacity align with national implementation of this directive, ensuring compliance with European standards for organic matter and nutrient removal. The treated effluent is discharged into the local watershed, which ultimately drains into the Garonne River via the Touch River or other tributaries. The Garonne flows into the Gironde estuary and the Atlantic Ocean, supporting diverse aquatic ecosystems and regional water quality.

The plant discharges into the Garonne River basin, a major watercourse in southwestern France that flows into the Gironde estuary and the Atlantic Ocean. The watershed supports diverse aquatic life, including migratory fish species such as salmon and eels. Downstream ecosystems rely on effective nutrient removal to prevent eutrophication and maintain water quality for agricultural and recreational uses.