ROSIERES_SANTERRE VRELY SE Wastewater Treatment Plant, Rosières-en-Santerre, France

ROSIERES_SANTERRE VRELY SE is a wastewater treatment plant located in Rosières-en-Santerre, a commune in the Somme department of Hauts-de-France, northern France. The plant serves a population of approximately 9,920 people, classifying it as a small to medium agglomeration under EU regulations. As a French facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size discharging into freshwater. The directive also mandates appropriate treatment to protect the receiving environment, with tertiary treatment required in sensitive areas. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Somme River and then into the English Channel. The Somme River supports diverse aquatic life and is an important ecological corridor in the region. Proper treatment helps protect water quality and downstream ecosystems.

The plant discharges into the Somme River basin, which flows into the English Channel. The Somme River supports a variety of fish species and provides habitat for migratory birds. The surrounding area includes agricultural land and small towns, making effective wastewater treatment essential to prevent nutrient pollution and maintain water quality in the river and coastal zone.