Overview
Castelnau-d'Estrétefonds wastewater treatment plant serves approximately 5,890 people in Occitanie, France. It operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
The Castelnau-d'Estrétefonds wastewater treatment plant is located in the commune of Castelnau-d'Estrétefonds, in the Haute-Garonne department of Occitanie, southern France. The facility serves a population of approximately 5,890, classifying it as a small to medium agglomeration under European Union regulations. As a French plant serving fewer than 10,000 people, it is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment before discharge. The plant discharges treated wastewater into the local watershed, which ultimately drains into the Garonne River via smaller tributaries. The Garonne flows through southwestern France and into the Gironde estuary, supporting diverse aquatic life and agricultural water use downstream.
Environmental context
The plant discharges into the Garonne River basin, which flows through the Occitanie region and eventually reaches the Gironde estuary on the Atlantic coast. The Garonne supports important fisheries and migratory fish species such as Atlantic salmon and European eel. The watershed is ecologically sensitive due to agricultural runoff and urban pressures, making effective wastewater treatment critical for maintaining water quality.
Frequently asked questions
The plant is located at D 820, Castelnau-d'Estrétefonds, in the Haute-Garonne department of Occitanie, France.
The plant serves approximately 5,890 people, classifying it as a small to medium agglomeration under EU regulations.
Treated wastewater is discharged into the local watershed, which flows into the Garonne River and eventually reaches the Gironde estuary on the Atlantic coast.
The plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size in France.
For agglomerations between 2,000 and 10,000 population equivalent, the EU UWWTD mandates secondary treatment, which typically involves biological processes to reduce organic matter and suspended solids.
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