Texas awarded IDE Technologies the Harbor Island seawater desalination contract for Corpus Christi Bay, a project with a combined estimated price of $6.4 billion and planned capacity of up to 100 million gallons per day, according to a Planetizen report published on 30 October 2026.
Key takeaways
- The Nueces River Authority awarded IDE Technologies the Harbor Island desalination contract in the summer of 2026, according to The Texas Observer.
- The facility is planned to produce up to 100 million gallons per day of freshwater and would be the largest desalination plant in the Western Hemisphere, according to IDE Technologies as reported by The Texas Observer.
- IDE Technologies plans to finance and build the plant while the Nueces River Authority develops the pipelines, with a combined estimated price of $6.4 billion, according to The Texas Observer.
- The Texas Commission on Environmental Quality approved its final permit for the Harbor Island plant on 23 September 2026, according to The Texas Observer.
- IDE Technologies still plans to announce the water price and ask Corpus Christi to sign a long-term purchase contract under which the city would pay for water whether or not it used the supply, according to Planetizen.
Private developer moves Harbor Island toward construction
The project is advancing on Texas’s Gulf Coast with IDE Technologies as a private, foreign water supplier rather than the owner of public infrastructure, according to The Texas Observer. The Nueces River Authority awarded the company the contract in the summer of 2026, and the facility is intended to address stretched water supplies amid rapid growth and intensifying droughts in Texas, according to The Texas Observer.
The Harbor Island proposal is the largest of five seawater desalination plants planned in Texas, according to The Texas Observer. IDE Technologies regional sales director Mark Ellison told the Nueces River Authority board that the project was the company’s global “Project One” and “Our top priority,” according to The Texas Observer.
According to IDE Technologies, the facility would be the largest desalination plant in the Western Hemisphere, eventually producing up to 100 million gallons per day of freshwater. It would include nearly seven miles of two-story-tall subsea tunnels and a system of pipelines and pump stations extending more than 200 miles inland to cities across south-central Texas, according to The Texas Observer.
Permit approved, with the water contract still ahead
The Texas Commission on Environmental Quality approved its final permit for the Harbor Island plant on 23 September 2026, according to The Texas Observer. IDE Technologies plans to finance and build the plant, while the Nueces River Authority will develop the associated pipelines, with a combined estimated cost of $6.4 billion, according to The Texas Observer.
Corpus Christi is expected to negotiate the operating cost after IDE Technologies announces the water price, according to Planetizen. The proposed long-term purchase contract would require the city to pay for the water regardless of whether it used it, and the supplied reports say the desalinated water would cost more than groundwater or freshwater, according to Planetizen.
Specification read
The reported design capacity of 100 million gallons per day converts to approximately 378,541 cubic metres per day; dividing that flow by an assumed 0.2 cubic metres per person per day gives a population-equivalent comparison of about 1.9 million people, though this conversion is an engineering comparison rather than a reported service population (The Texas Observer).
This is a seawater desalination project, not a conventional industrial wastewater treatment train. The reported scope emphasizes seawater intake, subsea tunnels, desalination, a pipeline and pump-station network, and freshwater delivery; the supplied sources do not report pretreatment, biological-treatment or disinfection capacities. For operators and buyers, the procurement distinction is important: the Harbor Island award centers on a new-build desalination and conveyance package, with IDE Technologies financing and building the plant and the Nueces River Authority developing the pipelines (The Texas Observer).
If your enquiry looks like a new seawater desalination plant at approximately 378,541 m³/day, with a large conveyance network and an unannounced water price under a take-or-pay purchase contract, this means the key evaluation points are the delivered-water price, the allocation of pipeline and plant risk, and the operating guarantees—not a standard activated-sludge or MBR capacity comparison (Planetizen).
For water-treatment planning, readers can review the Water Purification product hub and the Industries We Serve reference pages when framing future treatment requirements.
FAQ
What is the planned capacity of the Harbor Island desalination plant?
IDE Technologies says the facility would eventually produce up to 100 million gallons per day of freshwater, equivalent to approximately 378,541 cubic metres per day. That would make it the largest desalination plant in the Western Hemisphere, according to IDE Technologies as reported by The Texas Observer.
Who will build the plant and the associated pipelines?
IDE Technologies plans to finance and build the desalination plant, while the Nueces River Authority will develop the pipelines. The companies’ combined estimated price for the two elements is $6.4 billion, according to The Texas Observer.
What will buyers need to know about the water price and contract?
IDE Technologies has not yet announced the exact water price. It plans to ask Corpus Christi to sign a long-term purchase contract that would require payment for the water whether or not the city uses it, while the desalinated supply is expected to cost more than groundwater or freshwater, according to Planetizen.
Has the Harbor Island project received its final environmental permit?
Yes. The Texas Commission on Environmental Quality approved its final permit for the Harbor Island plant on 23 September 2026, according to The Texas Observer. The project remains subject to negotiation of the long-term water purchase arrangement with Corpus Christi.
