Overview
LA CROIX SAINT OUEN wastewater treatment plant serves approximately 120,667 people in Lacroix-Saint-Ouen, Hauts-de-France, France. It operates under the EU Urban Waste Water Treatment Directive.
LA CROIX SAINT OUEN is a wastewater treatment plant located in Lacroix-Saint-Ouen, a commune in the Oise department of Hauts-de-France, northern France. The plant serves a population of around 120,667, classifying it as a large agglomeration under EU regulations. It is situated near the city of Compiègne and lies within the Seine-Normandy river basin. As a facility serving over 100,000 people, LA CROIX SAINT OUEN is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment as a minimum and tertiary treatment in sensitive areas. The regulatory framework ensures compliance with stringent discharge standards for large agglomerations. The plant discharges treated wastewater into the local watershed, which ultimately drains into the Oise River, a major tributary of the Seine. The Seine River flows through Paris and into the English Channel, supporting diverse aquatic ecosystems and providing water for agriculture and industry. The plant plays a key role in protecting water quality in this densely populated and economically important region.
Environmental context
The plant's treated effluent enters the Oise River, which flows into the Seine River and eventually reaches the English Channel. The Seine basin supports a variety of fish species, including salmon and eels, and is an important migratory corridor. The plant's discharge contributes to the overall water quality in this heavily urbanized and industrialized watershed, where nutrient pollution and oxygen depletion are key concerns.
Frequently asked questions
The plant is located in Lacroix-Saint-Ouen, a commune in the Oise department of Hauts-de-France, northern France. Its address is Allée George et Bernard Woimant, Lacroix-Saint-Ouen, Compiègne, Oise, Hauts-de-France, 60610.
The plant serves approximately 120,667 people, classifying it as a large agglomeration under the EU Urban Waste Water Treatment Directive.
The plant discharges treated effluent into the local watershed, which flows into the Oise River, a tributary of the Seine River. The Seine ultimately drains into the English Channel.
As a French plant serving over 100,000 people, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment and potentially tertiary treatment in sensitive areas. Compliance is enforced by French authorities.
For large agglomerations in France, the EU UWWTD mandates secondary treatment (biological treatment) as a minimum. In sensitive areas like the Seine basin, tertiary treatment for nutrient removal is often required to protect water quality.
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