When Rio Tinto announced in March 2026 that it had struck a 50:50 joint venture with Western Australia's state-owned Water Corporation to build an A$1.1 billion (~US$770 million) desalination plant at Dampier, the deal attracted attention for its novelty: a mining giant, not a utility, co-investing in water infrastructure alongside a state entity. What received less notice was the structural choice embedded in the arrangement. There are no availability payments, no build-own-operate-transfer provisions, no 30-year concession to a private consortium. Rio Tinto operates the plant; Water Corporation distributes the output; both parties own the asset equally from day one. The Victorian desalination PPP at Wonthaggi, Australia's most prominent water concession, costs the state more than A$650 million annually in availability charges regardless of how much water it actually draws. Dampier was structured to avoid that trap: shared equity, no availability payments, no guaranteed revenue stream to a private consortium.
The Dampier JV is an unusual case, a mining company rather than a government driving the push for direct ownership, but the structural instinct it reflects is no longer unusual at all. Across the Gulf and beyond, governments are increasingly treating desalination as infrastructure too critical to be held at arm's length. The mechanism varies: an explicit privatisation cancellation in Saudi Arabia, a procurement pivot in Kuwait, a bilateral state-to-state construction agreement in Iraq. But the direction is consistent enough to warrant a map.
The model that worked, and the cracks that appeared
The build-own-operate-transfer model emerged in the Gulf in the 1990s as a solution to a genuine problem. Governments needed desalination capacity quickly; private capital could fund construction without burdening sovereign balance sheets; competitive bidding would drive down tariffs. The logic was sound, and the results were substantial. Tariffs for seawater reverse osmosis fell from above $1.00 per cubic metre under thermal distillation to below $0.40 under competitive Independent Water Producer (IWP) procurement, a compression that would not have happened under a state monopoly. The private sector's role was real, and the efficiency gains were measurable.
Governments that can afford it are choosing to own desalination infrastructure directly, rather than conceding it to private developers.
Yet the model carried an assumption that is now being tested: that governments would remain comfortable with private entities holding legal title to infrastructure that provides the most basic of public goods. That assumption has weakened for reasons that are partly economic and partly strategic. The security dimension sharpened considerably in 2026, when a GCC Secretariat meeting convened specifically to assess water supply preparedness amid heightened regional tensions. A contemporaneous analysis in Frontiers in Water argued that Gulf desalination investments carry a "sovereignty premium" — a strategic value of supply independence that consistently exceeds what economic cost-benefit analysis alone would justify. When ninety percent of Kuwait's drinking water and the majority of Gulf domestic supply flows from coastal plants, the argument for keeping those plants in state hands is not merely financial.
Mhamed Biygautane, Senior Lecturer in Public Management at the University of Melbourne and a specialist in GCC infrastructure governance, sees the shift as structural rather than cyclical. "After two decades of IWP and Independent Water and Power Producer (IWPP) concessions, GCC governments are quietly reasserting sovereign control over the strategic core of the water system," he says. "Water is being re-classified from a tradeable utility service into a national security asset."
There is also a structural shift in who plays the "private" role in the public-private partnership. The dominant desalination developers of the 2020s are not independent Western utilities deploying commercial capital. ACWA Power, which won or was named preferred bidder for roughly two-thirds of all GCC independent water projects in 2024, is approximately 44% owned by Saudi Arabia's Public Investment Fund. TAQA, which supplies around 85% of Abu Dhabi's power and 90% of its water, is 90% owned by Abu Dhabi Power Corporation, a government entity. When the PIF's vehicle wins a 25-year BOO contract from a Ministry of Finance-backed offtaker regulated by the Saudi Water Authority, the PPP label persists while the substance of private participation has fundamentally changed.
The map, country by country
Saudi Arabia has executed the most significant reversal. The Saline Water Conversion Corporation, operator of more than 30 desalination plants producing approximately 7.5 million cubic metres per day, part of a national total that, including private IWPs, accounts for roughly 22% of the world's desalinated water, was earmarked for privatisation as far back as 2008. Under Vision 2030, the programme accelerated, with Cabinet formally approving the sell-off of 11 plants in September 2019. The flagship transaction was Ras Al Khair, the world's largest hybrid facility. Seven consortia prequalified to bid for a 60% stake. Then, in July 2021, the tender was suspended. Eleven months later, the cabinet cancelled the privatisation of SWCC, ordering the transfer of all its direct and indirect assets to the PIF or any of its companies. SWCC's governor was direct: the corporation would remain a government agency. By May 2024, SWCC had been converted into the Saudi Water Authority — not a commercial entity but the Kingdom's central water regulator.
The dominant desalination developers of the 2020s are sovereign-aligned entities, not independent private companies, redefining what partnership means.
The distribution side tells a subtler version of the same story. The National Water Company awarded six regional Management, Operation and Maintenance Contracts between 2020 and 2022 to Veolia, SUEZ, Aqualia, and Saur, with an explicit stated intention to transition them to full 25–30-year concessions. NWC's then-interim chief executive said in September 2022 that strong early performance could accelerate that transition. The third-year thresholds have now passed for several clusters. No concession has been announced. At the NWC Partners Forum in Riyadh in February 2026, Saudi minister Abdulrahman Al Fadhli presented Aqualia's country manager with the award for best Management, Operation and Maintenance Contract, recognising the Spanish operator's performance across the Southern and Northern clusters. The ceremony encapsulates the new equilibrium: the state grades and rewards its contractors; the international operators compete to be the best-managed service provider rather than to own the assets that the original reform had promised them. Sharakat, formerly the Saudi Water Partnership Company, continues to tender new desalination capacity to private developers, but as a Ministry of Finance-owned sole offtaker that retains pricing authority and regulatory control.
Biygautane identifies three factors that determine whether a government chooses direct ownership or private participation: fiscal headroom, when sovereign balance sheets are strong, the appetite for off-balance-sheet PPP structures drops sharply; strategic exposure, states bordering contested waters or reliant on a handful of coastal plants for the bulk of potable supply place a premium on direct control; and institutional capacity, only governments with the technical and financial bench strength to run utilities themselves can credibly take assets back in-house. Kuwait, where nearly all drinking water depends on desalination, has moved toward direct state procurement rather than expanding independent water and power producer concessions. Iraq, rebuilding capacity after years of underinvestment, has favoured bilateral state-to-state construction agreements over competitive private tenders, again privileging direct control and sovereign counterparties over commercial concession structures.
What it means for operators and investors
None of this signals a retreat from private capital altogether. Construction, engineering, and operations contracts continue to go to international players, and the pipeline of new desalination capacity across the Gulf remains large. What has changed is where the line sits between "private participation" and "private ownership." Governments are increasingly comfortable paying international operators for performance, as the Aqualia and Veolia contracts show, while keeping asset title, offtake pricing, and long-term strategic control in sovereign or sovereign-aligned hands. For utilities and investors accustomed to the BOT/BOO playbook of the 2000s and 2010s, the practical implication is that the most bankable role going forward may not be as concession-holder, but as the trusted operator a government pays to run infrastructure it insists on owning.
