GUITRES Wastewater Treatment Plant, Guîtres, Nouvelle-Aquitaine, France

The GUITRES wastewater treatment plant is located in Guîtres, a commune in the Gironde department of Nouvelle-Aquitaine, southwestern France. It serves a small population of approximately 1,944 residents, reflecting its role in a rural or peri-urban setting. The plant is situated inland, more than 10 km from the coast, and contributes to local water management in the region. The facility employs advanced treatment processes, meeting high standards for effluent quality. With a design capacity of 2,000 m³/day and an average discharge volume of 346.81 m³/day, it operates well below its capacity, indicating potential for future growth. As a French plant, it operates under the national transposition of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates appropriate treatment levels based on population equivalents and receiving water sensitivity. The treated effluent is discharged into a local watercourse, likely a tributary of the Dordogne River or the Isle River, which flows into the Gironde estuary and ultimately the Atlantic Ocean. The plant's advanced treatment helps protect the downstream aquatic ecosystem, supporting biodiversity and water quality in the region's rivers and estuaries.

The plant discharges into a local water body that drains into the Isle River, a tributary of the Dordogne River. The Dordogne flows into the Gironde estuary, a major European estuary that supports diverse aquatic life, including migratory fish species such as salmon and eels. The advanced treatment ensures minimal nutrient and pollutant loading, protecting the ecological integrity of these downstream waters.