Overview
Lassigny wastewater treatment plant serves the commune of Lassigny in Hauts-de-France, France. It provides secondary treatment for a population of 1,604 with a designed capacity of 5,000 m³/day.
The Lassigny wastewater treatment plant is located in the commune of Lassigny, within the Oise department of the Hauts-de-France region in northern France. It serves a population of approximately 1,604 residents, making it a small-scale municipal facility. The plant is situated on Rue des Senteurs, near the center of the commune. As a secondary treatment facility, Lassigny employs biological processes to reduce organic matter and suspended solids from wastewater, in compliance with the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant has a designed capacity of 5,000 m³/day, with an average daily discharge volume of 286.15 m³, indicating a capacity utilization of about 5.7%. This suggests the plant is operating well below its design capacity, which is typical for small agglomerations with stable or declining populations. The treated effluent is discharged into the local watershed, which ultimately drains into the Oise River, a major tributary of the Seine. The Oise River flows through the Hauts-de-France region before joining the Seine near Paris, and the Seine then empties into the English Channel. The plant plays a key role in protecting the Oise River and downstream aquatic ecosystems from nutrient pollution and organic loading.
Environmental context
The Lassigny plant discharges into the Oise River basin, which flows into the Seine River and eventually the English Channel. The Oise River supports diverse aquatic life and is an important water resource for the region. Secondary treatment helps reduce biochemical oxygen demand and suspended solids, mitigating eutrophication risks in downstream waters. The plant's location inland, away from the coast, reduces direct marine impact, but its discharge contributes to the overall nutrient load in the Seine estuary.
Frequently asked questions
The Lassigny wastewater treatment plant is located at Rue des Senteurs, Lassigny, in the Oise department of the Hauts-de-France region, France.
The plant serves approximately 1,604 residents of the commune of Lassigny and surrounding areas.
The plant provides secondary treatment, which typically involves biological processes such as activated sludge or trickling filters to reduce organic matter and suspended solids before discharge.
The treated effluent is discharged into the local watershed that drains into the Oise River, a tributary of the Seine, which flows into the English Channel.
As a small agglomeration (under 2,000 population equivalent), the plant is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment (secondary or equivalent) for discharges into freshwater.
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