Overview
CASTRIES wastewater treatment plant in Castries, Occitanie, France, serves 4,700 people with advanced treatment. It discharges 838.47 m³/day and has a designed capacity of 6,300 m³/day.
The CASTRIES wastewater treatment plant is located in Castries, a commune in the Hérault department of Occitanie, southern France. The facility serves a population of approximately 4,700 residents and operates with advanced treatment processes, ensuring high-quality effluent before discharge. With a designed capacity of 6,300 m³/day and an average daily flow of 838.47 m³, the plant operates well below its capacity. As a French facility, it complies with the European Union's 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 plant is situated within 10 km of the Mediterranean coast, making its discharge potentially influential on coastal water quality. The treated effluent likely flows into local watercourses that drain into the Gulf of Lion, supporting marine ecosystems and recreational coastal areas.
Environmental context
The CASTRIES plant is located near the Mediterranean coast, within the watershed of the Lez and Mosson rivers, which drain into the Gulf of Lion. This coastal region supports diverse marine life, including seagrass meadows and fish nurseries. The advanced treatment helps protect these sensitive coastal waters from nutrient pollution and pathogens, maintaining ecological balance and supporting local tourism and fisheries.
Frequently asked questions
The CASTRIES plant is located in Castries, a commune in the Hérault department of Occitanie, southern France, near Montpellier.
The plant serves approximately 4,700 residents of Castries and surrounding areas.
The plant discharges treated effluent into local watercourses that flow toward the Mediterranean Sea, specifically the Gulf of Lion. Its advanced treatment ensures high-quality discharge to protect coastal waters.
The plant provides advanced treatment, which goes beyond secondary treatment to remove nutrients and other pollutants, meeting stringent EU standards for sensitive areas.
As a French plant serving over 2,000 people, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment as a minimum. Its advanced treatment aligns with requirements for sensitive coastal areas.
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