Overview
Castelsarrasin wastewater treatment plant serves approximately 21,845 people in Occitanie, France. The facility discharges into the Tarn River basin, contributing to the Garonne River watershed.
The Castelsarrasin wastewater treatment plant is located in the commune of Castelsarrasin in the Tarn-et-Garonne department of Occitanie, southern France. It serves a population of around 21,845 residents, classifying it as a medium-sized agglomeration under French and EU regulations. As a French wastewater facility, the plant operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for agglomerations of this size. The plant's treatment processes and capacity are managed to meet national standards set by the French Ministry of Ecology and local water agencies. The treated effluent is discharged into the Tarn River, a major tributary of the Garonne River, which flows into the Gironde estuary and ultimately the Atlantic Ocean. The plant plays a key role in protecting the water quality of the Tarn and Garonne rivers, supporting aquatic ecosystems and downstream uses such as agriculture and recreation.
Environmental context
The plant discharges into the Tarn River, which flows into the Garonne River, a major watercourse in southwestern France. The Garonne feeds the Gironde estuary, one of Europe's largest estuaries, supporting diverse aquatic life and migratory fish species. The watershed is ecologically sensitive, with areas of high biodiversity along the river corridors.
Frequently asked questions
The plant is located at 657, Chemin du Bac, in Castelsarrasin, Tarn-et-Garonne, Occitanie, France.
The plant serves approximately 21,845 people, classifying it as a medium-sized agglomeration under EU regulations.
The plant discharges treated effluent into the Tarn River, a tributary of the Garonne River, which flows into the Gironde estuary and the Atlantic Ocean.
As a French facility serving over 10,000 people, it operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which mandates secondary treatment for such agglomerations.
French plants of this scale typically provide secondary biological treatment, often with nutrient removal, to meet national water quality standards and EU directive requirements.
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