HSI Water is a water treatment company that has been serving customers since 1955, delivering practical, reliable solutions to complex water challenges.
Built on a foundation of technical expertise and strong customer relationships, the company has earned a reputation for dependable systems, responsive service, and a commitment to solving real-world problems.
At its core, HSI Water is committed to practical innovation, trusted partnerships, and water solutions that benefit the world.
Over the decades, HSI Water has focused on providing effective treatment solutions that help customers manage water quality, improve system performance, and operate more efficiently.
Now, with Derek Gonseaux and Jake Manchaca joined with pioneer Terry Gong and family founder John Harmon, as partners, they bring additional operational, commercial, and strategic leadership to the business. Together, the leadership team is focused on strengthening HSI Water’s core services while expanding the reach and capabilities of its technologies.
A Legacy of Water Innovation
AGRICULTURE
VINEYARDS
GOLF COURSES
Today, HSI Water is actively exploring innovative, real-world applications for advanced water treatment, including solutions for:
By combining proven systems with practical field experience, the company works alongside customers to turn complex water challenges into reliable, sustainable solutions.
Serving Customers Since 1955
Global Installations
2,000+
Systems Installed
Where Our Systems Make
an Impact
Soil reflects the quality of the water applied to it. Over time, poor irrigation water can degrade agronomic conditions.
The Harmon SO₂ Generator helps improve water quality by managing:
pH levels
alkalinity
water penetration
sodium adsorption ratio (SAR)
This creates more optimal growing conditions for a wide range of crops—including pH-sensitive varieties like blueberries and cranberries—while providing a safe, cost-effective solution for soil and water management.
AGRICULTURE
Maintaining consistent irrigation water quality is critical for healthy turf, plants, and overall course conditions—especially when using effluent water sources.
The Harmon SO₂ Generator helps improve water quality by managing:
pH control in water and soil
Neutralize Bicarbonates
algae growth in ponds and lakes
This supports healthier turf and more consistent playing conditions while providing a reliable solution for courses worldwide—including installations at St. Andrews in Scotland.
GOLF COURSES
Lower sodium absorption ratio (SAR) in the root zone by leaching harmful salts to deeper depths
The vineyard irrigation management goal is to supply grapevines with the right amount of water at the right time to support healthy growth while optimizing fruit quality—not simply to maximize yield.
The Harmon SO2 Generator helps improve the vineyard irrigation process by:
Reducing oxidation after harvest
Suppress pathogens in the soil
Neutralizes bicarbonates and corrects water pH levels helping to improve nutrient uptake by the plant roots
This promotes stronger vine health, cleaner fruit development, and improved quality at harvest and beyond.
VINEYARDS
Keep irrigation lines clear of biofilm and buildup for efficient water delivery
INSPIRED BY NATURE • ENGINEERED FOR YOU INSPIRED BY NATURE • ENGINEERED FOR YOU INSPIRED BY NATURE • ENGINEERED FOR YOU INSPIRED BY NATURE • ENGINEERED FOR YOU INSPIRED BY NATURE • ENGINEERED FOR YOU INSPIRED BY NATURE • ENGINEERED FOR YOU INSPIRED BY NATURE • ENGINEERED FOR YOU INSPIRED BY NATURE • ENGINEERED FOR YOU INSPIRED BY NATURE • ENGINEERED FOR YOU INSPIRED BY NATURE • ENGINEERED FOR YOU INSPIRED BY NATURE • ENGINEERED FOR YOU INSPIRED BY NATURE • ENGINEERED FOR YOU INSPIRED BY NATURE • ENGINEERED FOR YOU INSPIRED BY NATURE • ENGINEERED FOR YOU INSPIRED BY NATURE • ENGINEERED FOR YOU INSPIRED BY NATURE • ENGINEERED FOR YOU
