Overview
STEP DE SAINT ANDRE is a municipal wastewater treatment plant serving Saint-Benoît, La Réunion, France. It treats wastewater for approximately 40,887 people, supporting the island's sanitation infrastructure.
STEP DE SAINT ANDRE is a municipal wastewater treatment plant located in Saint-Benoît, on the French overseas department of La Réunion. The plant serves a population of approximately 40,887, making it a medium-sized agglomeration under French and EU regulations. Its location in the eastern part of the island places it within a tropical climate zone, where rainfall and volcanic terrain influence wastewater management. As a French territory, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The directive also mandates more advanced treatment if the discharge enters sensitive areas. The regulatory framework ensures compliance with European standards for effluent quality. The plant's treated effluent likely discharges into local watercourses that flow toward the Indian Ocean. La Réunion's eastern coast features several rivers and ravines that drain the volcanic slopes, supporting diverse aquatic ecosystems. The plant plays a key role in protecting these environments from untreated wastewater, particularly given the island's ecological sensitivity and reliance on coastal water quality for tourism and fisheries.
Environmental context
The plant discharges into the watershed of La Réunion's eastern coast, where rivers and streams flow from the volcanic highlands to the Indian Ocean. This coastal zone supports coral reefs, mangroves, and marine biodiversity that depend on clean water. The plant's operation helps prevent nutrient pollution and pathogen contamination in these sensitive nearshore habitats.
Frequently asked questions
STEP DE SAINT ANDRE is located in Saint-Benoît, on the island of La Réunion, a French overseas department in the Indian Ocean. The plant's address is Chemin Cabanon, Saint-François, Saint-Benoît.
The plant serves approximately 40,887 people, classifying it as a medium-sized agglomeration under EU regulations.
The treated effluent is likely discharged into local rivers or streams that flow to the Indian Ocean, supporting the island's water quality management.
As a French plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations over 2,000 population equivalent and more stringent treatment in sensitive areas.
Under the EU directive, plants serving this population typically provide secondary treatment (biological treatment) to reduce organic matter and suspended solids. In sensitive areas, tertiary treatment for nutrient removal may be required.
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