TSG Water Resources lands contract for major UHP seawater desalination plant in Mexico

TSG Water Resources has been contracted to design and supply a 1.8 million-gallon-per-day ultra-high-pressure seawater reverse osmosis facility in Mexico. The project would be among the world’s largest commercial UHP desalination systems and is targeted for commissioning in September 2027.

Why it matters: - The Mexico project pushes ultra-high-pressure seawater reverse osmosis into a much larger commercial scale. - The plant is designed to produce more potable water from the same seawater intake volume. - Higher recovery should also reduce brine discharge and shrink intake and civil infrastructure needs compared with a conventional plant of similar output.

What happened: - TSG Water Resources said August 20, 2026, that it has been contracted to design and supply a 1.8 million gallon per day, or 6,813 cubic meters per day, high-recovery ultra-high-pressure seawater reverse osmosis facility in Mexico. - TSG Water Resources described the facility as one of the largest UHP SWRO systems known to be in commercial operation anywhere in the world. - Design and procurement are underway. - Commissioning is targeted to begin in September 2027.

The details: - Ultra-high-pressure reverse osmosis uses specialized high-pressure membranes and pressure vessels. - The technology operates above 1,200 psi, or 83 bar, about 50% above the ceiling of conventional seawater RO membranes. - UHP membranes have been commercially available for several years. - Prior deployments have been mainly in industrial brine concentration, zero-liquid-discharge and mineral recovery work. - Those earlier applications were typically at capacities measured in hundreds of cubic meters per day. - The Mexico plant is designed for 67% recovery. - Conventional seawater plants typically run at 40% to 45% recovery. - TSG says the higher-recovery design will produce more potable water from the same intake volume and proportionally smaller brine discharge.

Between the lines: - The contract signals that UHP membranes are moving beyond niche industrial uses into larger municipal-style desalination projects. - TSG is also extending a desalination track record in Mexico. - The company previously delivered a 1.4 MGD high-recovery SWRO facility using Biturbo technology, which was the largest of its kind in the Western Hemisphere at completion. - The shift from Biturbo to UHP suggests the new project is aimed at even higher recovery and a larger operating scale.

What's next: - TSG Water Resources will continue design and procurement work through the buildout phase. - The company is aiming to start commissioning in September 2027. - If completed as planned, the plant would become a notable reference project for commercial UHP seawater desalination.

The bottom line: - TSG Water Resources is betting that ultra-high-pressure desalination can move from specialized industrial use to one of the world’s largest seawater treatment installations.