FRENEUSE Wastewater Treatment Plant, Freneuse, Île-de-France

FRENEUSE is a wastewater treatment plant located in Freneuse, a commune in the Yvelines department of Île-de-France, France. The plant serves a population of around 15,056, placing it in the medium agglomeration category under European Union regulations. It is situated inland, more than 50 km from the coast, and discharges into the local watershed. As a French plant of this scale, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations between 10,000 and 150,000 population equivalent. The directive also mandates more stringent treatment if the receiving water body is designated as sensitive. Compliance with the directive ensures a minimum level of treatment. The plant's treated effluent likely enters the Seine River basin, which flows through the Paris region and eventually into the English Channel. The Seine supports diverse aquatic life and is an important ecological corridor. Proper treatment at FRENEUSE helps protect downstream water quality and the marine environment.

FRENEUSE discharges into the Seine River basin, which flows through Île-de-France and drains into the English Channel. The Seine supports diverse aquatic life and is an important migratory corridor for fish. The plant's location inland, over 50 km from the coast, reduces direct marine impact, but its effluent contributes to the overall water quality of the river system.