PLOEMEL Pont Laurence, Ploemel

Overview

PLOEMEL Pont Laurence is a secondary treatment plant in Ploemel, Brittany, France, serving 3,300 people. It discharges treated wastewater near the coast, with a design capacity of 6,300 m³/day.

PLOEMEL Pont Laurence is a municipal wastewater treatment plant located in Ploemel, in the Brittany region of northwestern France. The facility serves a population of approximately 3,300 people, placing it within the small agglomeration category under French and EU regulations. The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. Its design capacity is 6,300 m³/day, and the reported discharge volume is 588.71 m³/day, indicating operational headroom. The treated effluent is discharged into the local hydrological network, which ultimately drains into the Atlantic Ocean via the Gulf of Morbihan or nearby coastal waters. The plant's proximity to the coast (within 10 km) means its discharge contributes to the nutrient load in a sensitive coastal environment, where eutrophication is a concern.

Environmental context

The plant discharges into a watershed that flows into the Gulf of Morbihan, a semi-enclosed marine inlet connected to the Bay of Biscay and the Atlantic Ocean. This coastal zone supports diverse marine life, including seagrass beds and shellfish fisheries, and is ecologically sensitive to nutrient enrichment from wastewater. The region's temperate maritime climate and tidal dynamics influence the dispersion and impact of treated effluent.

Frequently asked questions

The plant is located at 5, Kerran, Ploemel, in the Morbihan department of Brittany, France.

The plant serves approximately 3,300 people in the Ploemel area.

The plant provides secondary treatment before discharging into the local watershed, which flows toward the Gulf of Morbihan and the Atlantic Ocean.

As a French facility, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size discharging into freshwater or coastal waters.

For small agglomerations (under 10,000 population equivalent) in France, secondary treatment is the standard requirement under the EU directive, unless the receiving water is a sensitive area requiring more advanced treatment.