Seven Seas Water Group is a multinational developer, focused on owning and operating decentralized water and wastewater treatment plants and businesses
Our team has extensive experience in the global water sector, pioneering the Water-as-a-Service® approach, which we believe is superior to traditional equipment sales, engineering, procurement, construction (EPC), and outsourced operations and maintenance (O&M) business models, because our goals are fully aligned with the goals of our customers.
Headquartered in Tampa and Houston, with operations across the U.S., Caribbean, and Latin America, Seven Seas delivers water and wastewater treatment solutions to governmental, municipal, industrial, and hospitality customers and owns more than 200 water and wastewater treatment plants. The Seven Seas Water-as-a-Service® model has been successfully deployed for over 20 years, demonstrating our leading capabilities with project execution, financing, risk management, and operations. In addition to building new plants, the company is actively acquiring existing water and wastewater treatment plant operations.
In 2018, Seven Seas acquired Houston-based AUC Group, a leading provider of decentralized water and wastewater treatment plants throughout the U.S., with over 2,000 installations since 1970.
Seven Seas is a portfolio company of EQT, a purpose-driven global investment organization that partners with companies worldwide through its Private Capital and Real Assets strategies, supporting them in achieving sustainable growth, operational excellence, and market leadership.
Our Mission
Our priority is to provide safe, reliable, and cost-effective water and wastewater treatment solutions through our Water-as-a-Service® approach. We form long-lasting partnerships with our customers for a sustainable future by addressing water management challenges through our engineering experience, operational excellence, and financial resources. We design, build, acquire, refurbish, and operate our plants to perform at maximum efficiency, guaranteeing price, water quality, and quantity.
US Water Prize 2025 Outstanding Private Sector Organization
The US Water Alliance presented the 2025 US Water Prize for Outstanding Private Sector Organization to Seven Seas for our brackish water P3 with the City of Alice, Texas. This partnership model is proof that collaboration drives change, creating a replicable model for sustainable, integrated water management across the American Southwest.
The History of Seven Seas Water Group
In 1997, Seven Seas Water Group was established in the United States Virgin Islands with a mission of providing water management services to customers in the fresh water-scarce Caribbean.
In 2007, the company built one of the strongest teams of professionals in the water industry, quickly attracting investors. The company raised the capital needed to expand throughout the Caribbean, entered the South American market, and began exploring opportunities in the Middle East. Seven Seas became one of the fastest-growing privately-owned companies in the water industry and has continued to expand year after year.
In 2018, the company acquired, AUC Group, one of the industry’s leading wastewater treatment corporations, to further expand its offering.
In 2020, Seven Seas was acquired by funds managed by Morgan Stanley Infrastructure Partners, a leading global infrastructure investment platform.
In 2025, Seven Seas was acquired by EQT, a purpose-driven global investment organization.
Today, the company has corporate offices in Houston and Tampa, as well as a local presence in all of our markets.
Explore some of our case studies, or visit our blog to discover more about our water and wastewater solutions.
Our Commitment to
Sustainability Is Measurable
Each year, our operations are responsible for:
Learn more about our commitment to sustainability.
Connect With Seven Seas Water Group
Sign up for the latest news and trends in water production and wastewater treatment.