GOUAIX Wastewater Treatment Plant, Gouaix, Île-de-France

GOUAIX is a municipal wastewater treatment plant located in Gouaix, a commune in the Seine-et-Marne department of Île-de-France, France. The plant serves a population of approximately 2,070 residents and has a designed capacity of 2,000 cubic meters per day, with an average discharge volume of 369.28 m³/day. As a secondary treatment facility, GOUAIX meets the standard requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary biological treatment for agglomerations of this size. The plant operates under the French regulatory framework, which implements the directive through national legislation and local permits issued by the relevant water agency. The treated effluent from GOUAIX is discharged into the local water system, which ultimately drains into the Seine River basin. The Seine River flows through Paris and into the English Channel, supporting diverse aquatic ecosystems and serving as a critical water resource for the region. The plant's operations help protect downstream water quality and ecological health.

GOUAIX discharges treated wastewater into the Seine River basin, which flows northwest through Île-de-France and Normandy before reaching the English Channel. The Seine estuary and its associated wetlands provide important habitat for migratory birds and fish species, including the European eel. The plant's secondary treatment reduces organic pollutants and suspended solids, helping to maintain water quality in this densely populated and agriculturally active watershed.