SAMER SE Wastewater Treatment Plant, Samer, Hauts-de-France

SAMER SE is a wastewater treatment plant located in Samer, a commune in the Pas-de-Calais department of the Hauts-de-France region, northern France. The plant serves a population of approximately 6,133 residents, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). As a French wastewater facility, SAMER SE operates under the national transposition of the EU UWWTD (Directive 91/271/EEC). For agglomerations of this size (under 10,000 population equivalent), the directive requires appropriate treatment, typically secondary treatment, to protect receiving water bodies. The plant's treated effluent likely discharges into local watercourses that drain toward the English Channel, given its proximity to the coast (within 50 km). The receiving environment supports diverse aquatic life and is part of the regional hydrological network. Proper treatment helps safeguard downstream water quality and marine ecosystems.

SAMER SE is situated in the Liane river basin, which flows through the Boulonnais region and discharges into the English Channel at Boulogne-sur-Mer. The downstream environment includes estuarine and coastal habitats that support migratory fish and marine biodiversity. Effective wastewater treatment is essential to prevent nutrient enrichment and protect the sensitive coastal zone.