Overview
The CHARTRETTES wastewater treatment plant in Bois-le-Roi, France, serves about 5,500 people with advanced treatment. It discharges 977 m³/day into the Seine River basin, supporting local water quality.
The CHARTRETTES wastewater treatment plant is located in Bois-le-Roi, a commune in the Seine-et-Marne department of the Île-de-France region. It serves a population of approximately 5,500 residents and operates under France's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant provides advanced treatment, which goes beyond the secondary treatment standard required by the EU directive for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive receiving waters. The plant has a designed capacity of 8,933 m³/day and currently discharges an average of 977 m³/day of treated effluent. Treated effluent from the plant flows into the Seine River basin, which ultimately drains into the English Channel via the Seine estuary. The Seine River and its tributaries support diverse aquatic life and are important for regional water supply and recreation. Advanced treatment at this plant helps reduce nutrient loading and protects downstream ecosystems.
Environmental context
The plant discharges into the Seine River basin, which flows through Paris and into the Seine estuary before reaching the English Channel. The Seine supports a variety of fish species and is a critical water resource for the region. Advanced treatment at this plant helps minimize eutrophication risks in the river and its downstream estuary.
Frequently asked questions
The CHARTRETTES plant is located at Quai de la Ruelle in Bois-le-Roi, a commune in the Seine-et-Marne department of the Île-de-France region, France.
The plant serves approximately 5,478 people, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive.
The plant provides advanced treatment, which includes nutrient removal beyond secondary treatment. This is typical for plants discharging into sensitive areas like the Seine basin.
Under the EU UWWTD, agglomerations with a population equivalent (PE) between 2,000 and 10,000 require secondary treatment. CHARTRETTES, serving about 5,500 PE, meets this requirement and exceeds it with advanced treatment, likely due to the sensitivity of the receiving water body.
The treated effluent discharges into the Seine River basin, which flows through Paris and into the English Channel. The Seine is a major European river supporting diverse ecosystems and water uses.
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