Contact US

Friars Hill

P.O. Box W219,

St. John’s, 

Antigua & Barbuda

T: (268)-462-6565

F: (268) 460-9929


"In everything we do, we find the most energy efficient solution" -Mario Bento



Caribbean Water Treatment Ltd. was incorporated in St. John’s in August, 1992 under the Companies Act of Antigua & Barbuda.  It is a privately held, 100% Antiguan owned corporation.  Since 1992, the company has grown locally and regionally to become a leading provider of water and wastewater treatment services in the Eastern Caribbean. 


In 2006, the company separated its growing swimming pool business into a wholly owned subsidiary called CWT Caribbean Pools Ltd.  CWT Caribbean Pools Ltd. is the leading swimming pool construction and maintenance company in Antigua, and also provides its services in other Easter Caribbean islands.


In 2013, the company moved from its original location on Lower Dickenson Bay Street in St. John’s.  Our new 11,000 square feet facility is located at Friars Hill, St. Johns, Antigua housing a retail store, offices, warehouse and specialized chemical storage rooms.


The company’s founder and managing director, Mr. J. Mario Bento, has over 27 years of experience in water treatment in North America and the Caribbean.  He holds a Bachelor of Applied Science degree in Chemical Engineering from the University of Toronto and a Masters in Environmental Systems Engineering from McMaster University in Canada. 


In addition to work-terms at ESSO Chemical in Canada and the Antigua Public Utilities Authority (APUA) Crabbs Desalination Plant, Mr. Bento also worked four years as a process development engineer for Zenon Environmental Inc. in Canada, a worldwide leader in the development and manufacture of membrane based systems for water and wastewater treatment.  At Zenon, Mr. Bento managed process development projects for several large industrial clients across Canada and the U.S., including IBM, Maxwell House, Procter & Gamble and Kraft General Foods. 


The company now specializes in swimming pool, water and wastewater treatment services, serving commercial, residential and industrial customers in Antigua and other Caribbean islands.  We provide a full range of services including:

  • Design and consulting services

  • Equipment sales and procurement

  • Equipment installation

  • Repairs

  • Operation/maintenance contracts

  • Sales of water treatment chemicals and supplies


Reverse Osmosis Desalination

Reverse Osmosis Desalination Caribbean Water Treatment Ltd. represents ITT-Water Equipment Technologies (WET) exclusively in the Eastern Caribbean. WET is a leading manufacturer of brackish and seawater reverse osmosis (RO) desalination plants, providing membrane systems solutions since 1975. RO systems are available from 100 GPD to capacities of several million gallons per day. WET’s durable and reliable Seawater Reverse Osmosis systems are designed to perform in the harsh and corrosive environments we experience in the Caribbean. Their manufacturing facilities are located in Dallas, Texas. See


We have installed WET RO plants at resorts throughout the Caribbean. Specifically in this region, Antigua, Barbuda, St. Martin, and Tortola. We are currently installing a three 250,000 gpd reverse osmosis desalination plants for a resort venture in Antigua with seawater and brine outfall infrastructure to increase to 2.25 million gpd. Installation was completed in February, 2007 on a 750,000 gpd capacity for the Antigua Public Utilities Authority in the north of the island.

Activated Sludge Sewage Treatment

Caribbean Water Treatment Ltd. designs and constructs simple, extended aeration SBR, all custom built to meet our customers’ requirements. We also design and construct sewage collection systems for resorts and commercial developments. We have installed over 40 plants ranging in size from 500 gpd to 70,000 gpd for hotels, resorts and commercial facilities in Antigua and St. Kitts. Technology and expertise is available through ITT Advanced Water Group to provide more sophisticated wastewater treatment processes.

Water Treatment

Caribbean Water Treatment Ltd. supplies and installs UV sterilizers, ozonators, sediment filters, activated carbon filters, ion exchange systems and chlorination systems. Our experience covers potable water treatment, bottle water production and industrial pure water applications. UV Sterilizer for residential and commercial potable water applications are available from Trojan Technologies. Ozonation and UV equipment is also available from ITT Wedeco. In addition, we provide water pumps and distribution systems for residential, commercial and industrial applications. We are dealers for STA-Rite pumps and pressure tanks, and ITT Goulds Water (sewage and effluent pump products).