Overview
CAYENNE HORTH MONTABO is an advanced wastewater treatment plant in Cayenne, French Guiana, serving 1,490 people. It discharges 265.81 m³/day and is located within 10 km of the coast.
CAYENNE HORTH MONTABO is an advanced wastewater treatment plant located in Cayenne, the capital of French Guiana, an overseas department of France. The plant serves a small population of 1,490 residents and operates with a designed capacity of 638.00 m³/day, currently discharging 265.81 m³/day of treated wastewater. As a French territory, the plant operates under the European Union's Urban Waste Water Treatment Directive (91/271/EEC), which requires advanced treatment for sensitive areas. The plant's advanced treatment level exceeds the secondary treatment standard typically mandated for small agglomerations under 2,000 population equivalents, reflecting the sensitivity of the local environment. The plant is situated near the coast of the Atlantic Ocean, within 10 km of the shoreline. Its treated effluent likely drains into the Cayenne River or directly into the Atlantic, impacting the coastal waters of French Guiana. The region's tropical climate and proximity to the Amazon basin make the local watershed ecologically significant, supporting diverse marine and estuarine habitats.
Environmental context
The plant discharges into the coastal waters of the Atlantic Ocean near Cayenne, French Guiana. The local watershed includes the Cayenne River and surrounding mangrove ecosystems, which are critical for fish nurseries and migratory bird species. The Atlantic Ocean in this region is part of the larger Amazon-Orinoco coastal zone, known for high biodiversity and sensitive coral reef systems. The advanced treatment helps protect these downstream environments from nutrient pollution and pathogens.
Frequently asked questions
The plant is located at 3 Rue Parépou, Résidence Auguste Horth, Cité Grant, Cayenne, Guyane, 97300, France, in the capital city of French Guiana.
The plant serves approximately 1,490 residents in the Cayenne area.
The plant discharges treated wastewater into the coastal waters of the Atlantic Ocean, likely via the Cayenne River or direct outfall, given its proximity to the coast.
As a French facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates advanced treatment in sensitive coastal areas to protect marine ecosystems.
For small agglomerations under 2,000 population equivalents, the EU directive requires secondary treatment, but in sensitive coastal zones like French Guiana, advanced treatment is often implemented to reduce nutrient loads and protect biodiversity.
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