For properties without a public sewer connection, Geotech Caraïbes partners with Guamikeni — Water Management Company, a specialist in decentralized wastewater treatment across the Caribbean. Together, we handle every stage: design, excavation, treatment system installation, commissioning, and maintenance.
Not every property in Saint-Martin is served by a public sewer system. For a remote villa, a residential development beyond the sewer network, or a facility in a rural area, an onsite wastewater treatment system treats wastewater directly on the property, with capacity tailored to the site and its use.
This work brings together civil construction and wastewater treatment. That is why Geotech Caraïbes partners with Guamikeni, a recognized Caribbean specialist, to deliver a complete service from design through ongoing maintenance.
Guamikeni — Water Management Company specializes in decentralized wastewater collection and treatment. Based in Saint-Martin / Sint Maarten and Antigua, the company serves clients throughout the Caribbean. Its mission: “Protect Caribbean land and water”.
A member of the Caribbean Water & Wastewater Association (CWWA), Guamikeni designs environmentally responsible solutions for hotels, residential communities, villas, industrial facilities, and marinas.
Explore Guamikeni →Hydraulic calculations, treatment system sizing, equipment selection, and technical drawings — by Guamikeni.
Excavation, bedding, backfilling, and connections, carried out by Geotech Caraïbes crews using our own equipment fleet.
Tank and equipment installation, mechanical, electrical, and plumbing (MEP) work, and treatment system startup.
Maintenance agreements, system cleaning, CCTV inspections, water quality testing, and emergency response seven days a week — by Guamikeni.
Every installation starts with excavation, bedding, and leveling. The treatment tanks are then lowered into place by crane and precisely positioned and secured, even on the steep sites commonly found across the island.
The service life of a wastewater system depends on the quality of its civil works. That is where the Geotech Caraïbes team excels.
Trenching, equipment alignment, and pipe connections: each component is installed in sequence and checked before backfilling.
Guamikeni sizes the complete system to match the project's actual wastewater flow and soil conditions, ensuring compliance and lasting performance.
Once the work is complete, only the inspection covers remain accessible for maintenance. The system is concealed beneath the restored grounds, ready to provide lasting protection for the lagoon, groundwater, and coastline.
Heavy lifting, tight sites, and night work when needed: we adapt our equipment and crews to each project's constraints to stay on schedule while maintaining quality.
We work with homeowners and businesses on both new installations and upgrades to existing systems:
A public sewer system carries wastewater from your property to a centralized treatment plant. An onsite wastewater treatment system treats wastewater directly on your property using a self-contained system when a public sewer connection is not available. For public sewer systems, visit our sewer services page.
Onsite wastewater treatment requires two areas of expertise: civil construction — excavation, installation, and connections — which is Geotech Caraïbes' core business; and wastewater treatment engineering — system sizing, equipment, commissioning, and maintenance — which is Guamikeni's specialty. By bringing both together, we provide a single point of contact for a reliable, compliant system with ongoing support.
Yes. We upgrade or replace outdated or noncompliant systems for homes, villas, and facilities open to the public. We assess the existing installation, recommend a suitable treatment system, and carry out the work.
Yes. Geotech Caraïbes works across the entire island, on both the French and Dutch sides. Guamikeni also has a presence in Saint-Martin / Sint Maarten and Antigua, and serves the wider Caribbean.
Geotech Caraïbes and Guamikeni support your onsite wastewater treatment project in Saint-Martin, from design through maintenance. Free estimates and a prompt response.