CHEVRIERES 2 Wastewater Treatment Plant, Chevrières, Hauts-de-France

CHEVRIERES 2 is an advanced wastewater treatment plant located in Chevrières, a commune in the Oise department of Hauts-de-France, France. The plant serves a population of approximately 4,872 people and has a designed capacity of 5,650 m³/day, with an average discharge volume of 869.16 m³/day. As an advanced treatment facility, CHEVRIERES 2 goes beyond secondary treatment to remove nutrients and other pollutants, meeting stringent standards under the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations of this size (under 10,000 PE), the directive requires appropriate treatment, and France's national regulations often mandate advanced treatment in sensitive areas to protect water quality. The plant discharges treated wastewater into local watercourses that ultimately drain into the Oise River, a major tributary of the Seine River. The Seine basin supports diverse aquatic life and is an important ecological corridor in northern France. The plant's advanced treatment helps reduce nutrient loading and protect downstream ecosystems, including the Seine estuary and the English Channel.

The treated effluent from CHEVRIERES 2 flows into local streams that feed the Oise River, which joins the Seine River near Paris. The Seine River then discharges into the English Channel via the Seine estuary. This watershed supports diverse aquatic habitats and is a critical migratory corridor for fish species. The plant's advanced treatment helps minimize nutrient pollution, protecting downstream water quality and ecological balance in the Seine basin.