Plougastel Daoulas Toull ar Ranig Wastewater Treatment Plant, Plougastel-Daoulas, Brittany

Plougastel Daoulas Toull ar Ranig is a wastewater treatment plant located in Plougastel-Daoulas, a commune in the Finistère department of Brittany, France. The plant serves a population of about 7,966 and is situated near the coast of the Atlantic Ocean. As part of France's wastewater infrastructure, it plays a key role in protecting local water quality. The plant operates under the European Union's Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The designed capacity is 1.00 (likely in thousands of cubic meters per day), indicating a facility scaled to handle the community's wastewater. French plants typically employ biological treatment to meet EU standards. The treated effluent is discharged into the local watershed, which ultimately drains into the Atlantic Ocean via the Rade de Brest. This coastal environment supports diverse marine life, including shellfish beds and migratory fish species. The plant's proximity to the coast underscores the importance of effective treatment to prevent nutrient pollution and protect marine ecosystems.

The plant discharges into the local watershed that flows into the Rade de Brest, a large natural harbor connected to the Atlantic Ocean. This coastal area supports ecologically sensitive habitats, including seagrass beds and shellfish farming zones. Effective wastewater treatment is critical to prevent eutrophication and maintain water quality for marine biodiversity and human activities such as fishing and tourism.