Overview
Montady wastewater treatment plant in Occitanie, France serves 3,700 people with advanced treatment. It discharges 660 m³/day and has a designed capacity of 5,500 m³/day.
The Montady wastewater treatment plant is located in the commune of Montady, within the Hérault department of Occitanie, southern France. It serves a population of approximately 3,700 residents and operates with advanced treatment processes, ensuring high-quality effluent before discharge. With a designed capacity of 5,500 m³/day and an average daily discharge volume of 660 m³, the plant operates well below its capacity. As a French facility, it complies with national regulations transposing the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates advanced treatment for sensitive areas and secondary treatment for all agglomerations above 2,000 population equivalent. The treated effluent is discharged into the local watershed, which ultimately drains into the Mediterranean Sea via the Orb River and the Thau lagoon basin. The plant's advanced treatment helps protect the ecologically sensitive coastal and lagoon environments, supporting biodiversity and water quality in the region.
Environmental context
The plant discharges into the Orb River catchment, which flows into the Thau lagoon and then the Mediterranean Sea. The Thau lagoon is a large coastal lagoon supporting shellfish farming and diverse aquatic life. Advanced treatment at Montady reduces nutrient loads, protecting the lagoon's sensitive ecosystem from eutrophication.
Frequently asked questions
The Montady WWTP is located at D 162E1, Montady, in the Hérault department of Occitanie, southern France.
The plant serves approximately 3,700 residents in the Montady area.
The plant discharges treated effluent into the local watershed, which flows into the Orb River and eventually reaches the Thau lagoon and the Mediterranean Sea.
The Montady plant provides advanced treatment, which includes nutrient removal to protect sensitive receiving waters.
The plant operates under French regulations implementing the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations of this size (3,700 people), secondary treatment is required, and advanced treatment is applied in sensitive areas.
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