NAUCELLE Wastewater Treatment Plant, Naucelle, Occitanie, France

The NAUCELLE wastewater treatment plant is located in Naucelle, a commune in the Aveyron department of Occitanie, southern France. The plant serves a small population of around 1,771 residents, reflecting the rural character of the area. It is situated along Chemin de la Rivière, indicating proximity to a local watercourse. 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 of 3,600 cubic meters per day is well above the current discharge volume of 315.94 cubic meters per day, suggesting ample reserve capacity. As a French facility, it operates under national regulations transposing EU directives, with permits issued by the local water agency (Agence de l'Eau). The treated effluent is discharged into a local river, likely a tributary of the Aveyron River, which flows into the Tarn River and eventually reaches the Garonne River and the Atlantic Ocean. The plant plays a key role in protecting the water quality of this river system, supporting aquatic life and downstream uses such as agriculture and recreation.

The plant discharges into a local watercourse that feeds into the Aveyron River, a tributary of the Tarn River. The Tarn flows into the Garonne River, which empties into the Gironde estuary and the Atlantic Ocean. This watershed supports diverse aquatic ecosystems, including fish species such as trout and grayling, and provides water for irrigation and drinking water downstream. The advanced treatment helps minimize nutrient and pollutant loads, protecting the ecological health of the river network.