Overview
MONTREJEAU wastewater treatment plant serves Montréjeau in Occitanie, France, treating wastewater for 3,240 people with secondary treatment and a designed capacity of 2,500 m³/day.
The MONTREJEAU wastewater treatment plant is located in Montréjeau, a commune in the Haute-Garonne department of Occitanie, southern France. It serves a population of approximately 3,240 people, classifying it as a small agglomeration under French and EU regulations. The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. The designed capacity is 2,500 m³/day, and the average daily discharge volume is 578 m³, indicating operational headroom. Treated effluent is discharged into the local watershed, which ultimately drains to the Garonne River via the Gesse or Neste tributaries. The Garonne flows into the Gironde estuary and the Atlantic Ocean, supporting diverse aquatic life and agricultural water use in the region.
Environmental context
The plant discharges into a tributary of the Garonne River, which flows through southwestern France to the Gironde estuary and the Atlantic Ocean. The Garonne basin supports migratory fish species such as Atlantic salmon and European eel, and the estuary is a critical nursery for marine life. Secondary treatment helps reduce organic pollution and protect downstream water quality.
Frequently asked questions
The plant is located in Montréjeau, in the Haute-Garonne department of Occitanie, southern France.
The plant serves approximately 3,240 people, classifying it as a small agglomeration under EU regulations.
The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive for freshwater discharges from agglomerations of this size.
The treated effluent is discharged into a local tributary that flows into the Garonne River, eventually reaching the Gironde estuary and the Atlantic Ocean.
As a small agglomeration (under 10,000 population equivalent) discharging to freshwater, the EU Urban Waste Water Treatment Directive requires at least secondary treatment. The plant meets this requirement.
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