Overview
GAMACHES SE is an advanced wastewater treatment plant in Longroy, Normandie, France, serving about 2,226 people. It discharges treated water near the coast, with a designed capacity of 3,000 m³/day.
GAMACHES SE is a wastewater treatment plant located in Longroy, a commune in the Seine-Maritime department of Normandie, France. The facility serves a population of approximately 2,226 people and is situated near the coast, reflecting the region's coastal geography. The plant is part of France's extensive wastewater infrastructure, which operates under the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant employs advanced treatment processes, ensuring a high level of pollutant removal before discharge. With a designed capacity of 3,000 m³/day and a current discharge volume of 397.11 m³/day, the facility operates well below its capacity, indicating room for future growth or seasonal variations. Advanced treatment typically includes nutrient removal, which is crucial for protecting sensitive coastal waters. The treated effluent is discharged into the local watershed, which ultimately drains into the English Channel. This coastal discharge requires careful management to prevent eutrophication and protect marine ecosystems. The plant's advanced treatment helps minimize environmental impact, supporting the ecological health of the downstream coastal environment.
Environmental context
The plant discharges into the local watershed that flows into the English Channel, a vital marine ecosystem supporting diverse aquatic life and important for fisheries. The coastal location necessitates advanced treatment to reduce nutrient loads and prevent algal blooms, safeguarding the ecological balance of the Channel's coastal waters.
Frequently asked questions
GAMACHES SE is located in Longroy, a commune in the Seine-Maritime department of Normandie, France. The address is Chemin des Prairies, Longroy, 76260.
The plant serves approximately 2,226 people, classifying it as a small agglomeration under EU regulations.
The plant discharges treated effluent into the local watershed, which ultimately flows into the English Channel. Being within 10 km of the coast, the discharge is carefully managed to protect coastal waters.
GAMACHES SE provides advanced treatment, which includes nutrient removal beyond secondary treatment. This is particularly important for coastal plants to prevent eutrophication in sensitive marine environments.
Under the EU UWWTD, plants serving small agglomerations (under 10,000 people) are generally required to provide secondary treatment. However, GAMACHES SE exceeds this requirement with advanced treatment, likely due to its coastal location in a sensitive area.
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