AI data centers need water for cooling. WaterPearls suppress evaporation on the surrounding farms, in the field and on irrigation reservoirs, so that water stays in the basin. It is metered, independently verified and allocated to your facility through a 25-year Water Replenishment Infrastructure Agreement (WRIA™).
Evaporation-suppression range from RHST laboratory and field measurements; irrigation and yield figures are site-specific, measured against a baseline. Context: 25–50% of irrigation water is lost to evaporation (UN FAO); reservoir evaporation is estimated at ~20% of global consumptive water use (Zhao et al., Nature Communications, 2022).
North America
Nearly half of the world's data centers are in the United States, and hyperscalers have made public water-replenishment commitments for 2030. Those pledges need what permitting needs: verified, in-basin volume.
Worldwide
From community approvals in North America to environmental permits in Europe, regulators and neighbours now ask the water question before the build.
The gap
Traditional water offsets are expensive, slow to deploy, or hard to verify. A metered, in-basin water benefit is what permitting and disclosure actually need.
North American data centers use water on the order of 1.08 trillion litres a year (2025), projected to reach ~1.69 trillion by 2030 (Mordor Intelligence).
WaterPearls suppress evaporation in the field and on open water, turning losses into recoverable water yield.
In the field, on perennial-crop irrigation and on reservoirs, WaterPearls suppress evaporation: conserved water stays in the basin instead of being lost to the air.
The conserved water is metered net of return flows, using WRI's VWBA 2.0 water-benefit accounting.
Third-party verification under WRI's VWBA 2.0 methodology, with SCS Global Services as designated verifier, aligned with the basin's water-management plan.
The verified benefit is allocated to your facility under a 25-year take-or-pay contract. Participating farmers pay nothing.
WaterPearls are organic, super-hydrophobic beads the size of a small grape. They float on open water and suppress evaporation from the surface. Deployed once, they keep working on their own, with no power and no moving parts.
Like a solar farm, a WRIA™ is built once and delivers for decades: a verified water benefit, every year for 25 years, sold as water-as-a-service on a take-or-pay contract, funded by the data center and infrastructure capital, never by the farmer.
01 · Hardware
Deployed once, a single capital event that creates a durable, no-moving-parts evaporation barrier.
02 · Deployment
Installation, integration and optimization, designed around the irrigation systems already in place.
03 · MRV
Independent MRV verifies the metered water savings, disclosure-ready under IFRS S2 and EU CSRD where it applies.
04 · Financialization
The verified benefit underpins a 25-year indexed cash flow, the kind institutional capital underwrites once an investment-grade offtaker is contracted.
Farms draw roughly 70% of the world's fresh water, and a large share of it is lost to evaporation, in the field and on open water. Suppress that loss and the water stays in the catchment, in the basins your facilities depend on.
01 · Proactive water stewardship
Put verified, metered water stewardship on the table, for siting and community approvals in North America, and permitting in stressed basins worldwide.
02 · Enhanced ESG performance
A verified, same-basin water benefit that counts toward public water-replenishment commitments, and feeds IFRS S2 and EU CSRD disclosure.
03 · Community alignment
Measurable local water benefits delivered with the basin's water agencies, building the community trust new builds depend on.
04 · Risk management
Reduced exposure to drought restrictions and water-shortage risk, the exposure specialty insurers assess and underwrite.
05 · Long-term supply resilience
Stronger watershed sustainability in the basins your facilities depend on, for the life of the contract.
North America is the largest data-center market, and its hyperscalers are publicly committed to replenishing water by 2030. A WRIA™ delivers a verified, same-basin water benefit that maps directly to those 2030 replenishment commitments.
Why now
Credentials
An NCPD Innovative Technology Excellence Prize 2025 (Saudi Arabia), a Solar Impulse Efficient Solution label (2020 and 2023), a U.S. patent granted in 2018 (active to 2034), an ISO 14046-based water impact assessment, pilot trials in six countries since 2016 with UC Davis and NAIT, and selection in VivaTech's 2026 Top 400 Tech for Change.
The asset
A 25-year contracted water benefit, backed by a verifiable water resource, a structure institutional capital can fund once an investment-grade offtaker signs.
Early-stage discussions underway; pilot and quantification partners being engaged. RHST licenses its technology to strategic operating partners. Partners & licensing →
In the United States, investors and communities increasingly press operators on water. Europe already gates new data centers on water permitting and disclosure. Île-de-France, home to more than half of France's data-center capacity, is the sharpest example, and Québec's LQE / REAFIE regime follows the same logic. Wherever water gates the build, a WRIA™ gives the operator a verified, same-basin water benefit to put on the table.
