REQUISTA Wastewater Treatment Plant, Réquista, Occitanie, France

The REQUISTA wastewater treatment plant is located in Réquista, a commune in the Aveyron department of Occitanie, southern France. The facility serves a population of approximately 1,987 residents and operates with advanced treatment processes, ensuring high-quality effluent standards. As an advanced treatment plant, REQUISTA goes beyond secondary treatment to remove nutrients and other pollutants, meeting stringent French and European standards. The plant has a designed capacity of 2,900 m³/day and currently discharges 354.48 m³/day, indicating ample reserve capacity. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations of this size are required to provide secondary treatment, but REQUISTA exceeds this with advanced treatment. The treated effluent is discharged into local waterways within the Tarn River basin, which flows into the Garonne River and ultimately to the Atlantic Ocean. The plant's advanced treatment helps protect the sensitive aquatic ecosystems of the region, supporting biodiversity and water quality downstream.

The plant discharges into the Tarn River basin, a tributary of the Garonne River, which drains into the Atlantic Ocean via the Gironde estuary. The local watershed supports diverse aquatic life, including fish species such as trout and salmon. Advanced treatment at REQUISTA reduces nutrient loading, helping to prevent eutrophication in downstream water bodies and maintaining ecological balance.