Water Accounting Is Coming for Your Power Procurement?: the real signal is the immediate adjustment required in cash, risk, and execution
Signals That Are Accumulating
The visible fight is about cooling towers and gallons-per-day commitments to municipal utilities. The less visible fight is about who is responsible for the water consumed upstream at the power plants supplying those data centers.
Industry analysis cited in a July 2026 report from thebrockovichreport.com suggests that roughly 80 percent of a data center’s total water footprint is indirect—consumed not on campus, but at the thermal generation sources feeding the facility’s electrical load. The International Energy Agency offered a comparable estimate in 2025: approximately two-thirds of all water used by data centers is linked to electricity generation. If that framing is directionally correct, the efficiency metrics operators currently publish—liters of water per kilowatt-hour measured at the building—are capturing the smallest portion of the real exposure.
Operational evidence is accumulating on multiple fronts. Google’s reported water consumption grew from roughly 6 billion gallons globally in 2023 to approximately 10.9 billion gallons in 2025, a near-doubling across two years that coincided with stated efficiency improvements. Public records obtained through litigation reportedly show Google’s consumption in The Dalles, Oregon grew approximately fivefold between 2012 and 2025, reaching around 550 million gallons annually—representing close to 40 percent of a town of fewer than 16,000 people’s total water supply. Residents face projected water bill increases as the city upgrades aging infrastructure, with the specific demand driver kept confidential under a non-disclosure arrangement with the operator.
In Botetourt County, Virginia, a court-ordered disclosure revealed a water supply agreement with the Western Virginia Water Authority permitting an initial draw of up to 2 million gallons per day, expandable to 8 million. That figure was redacted from publicly released documents until litigation forced disclosure. By the water authority’s own director’s account, signing confidentiality agreements on economic development projects is now routine practice at the utility—suggesting the disclosed cases are plausibly a fraction of the arrangements currently in place.
Why No One Is Naming It Yet
The energy-water nexus rarely surfaces in power procurement conversations for a structural reason: the accounting stops at the meter. When a data center reports water usage effectiveness, it measures the facility. The water consumed two counties over at the gas plant supplying that electricity is counted by no one—not the operator, not the utility, not the ISO.
This creates a clean blind spot. Amazon’s 2025 sustainability materials reportedly claim a WUE of 0.12 L/kWh against an industry benchmark of 0.84 L/kWh. What the source article notes is that Amazon’s associated 2.5-billion-gallon global consumption figure represents the company’s first-ever public disclosure of a total water number, with no prior baseline to compare it against. Whether on-site efficiency gains are real or whether the measuring frame is simply too narrow is a question the current disclosure structure does not require anyone to answer.
The pattern is also easy to miss because it crosses sector boundaries without triggering a single regulator. Water planners look at municipal draw. Energy regulators look at capacity and emissions. Data center operators report at the building. No single authority owns the indirect water question, so it has no natural escalation forum—until litigation creates one.
What Happens If the Pattern Continues
State legislators are accelerating. The source article references newly published legislative frameworks outlining four regulatory pathways for states to address data center water consumption. California’s governor vetoed water disclosure legislation for data centers, but the veto itself signals the bill achieved legislative majority. Oregon’s governor has publicly characterized data center water and energy consumption as unsustainable at current growth rates. These are governors responding to constituent pressure at public utilities, not fringe positions.
If disclosure mandates advance, they are unlikely to stop at direct facility consumption. The logical extension—consistent with how Scope 2 carbon accounting developed—is that regulators will eventually require operators to account for the water intensity of their power supply. That converts a water disclosure question into an energy procurement question: what generation sources are feeding your load, and what is their water withdrawal intensity per megawatt-hour? Gas combined-cycle and coal plants carry materially higher water intensities than solar or wind per MWh, meaning PPA structure and grid mix selection become water exposure variables.
Closed-loop cooling, often positioned as the clean solution, introduces a secondary complication. It can reduce on-site water use by up to 95 percent relative to conventional cooling towers, but it increases electricity demand. Depending on grid mix, that additional load may increase upstream water consumption at thermal generators—trading visible on-site water use for indirect upstream exposure, which satisfies today’s reporting requirements while potentially deepening tomorrow’s.
What You Can Do Before It Is Obvious
The window for proactive positioning exists precisely because the regulatory framework is fragmented and no unified accounting standard yet applies. Three moves have more value now than they will once the standard exists.
Map the water intensity of your generation mix. PPAs backed by solar and wind carry materially lower water withdrawal rates per MWh than thermal alternatives. If your portfolio carries significant gas-backed firm power or high thermal exposure in water-stressed regions, that exposure is quantifiable today with publicly available generation technology data—and understanding it before a regulator demands disclosure preserves procurement options.
Pressure-test your current WUE and water-positive claims against the indirect water question internally. If your sustainability team cannot model what fraction of total water footprint is indirect, your next disclosure cycle carries a credibility risk that a single well-framed stakeholder request could surface. Amazon’s position—strong on-site efficiency metrics, no disclosed methodology for indirect water—illustrates how quickly a first-time total disclosure becomes a scrutiny target rather than a headline achievement.
Track state-level water disclosure legislation as a leading indicator of where energy procurement transparency requirements are heading. The precedent set by Scope 2 carbon accounting—voluntary, then investor-driven, then regulatory—took roughly a decade to play out. Water disclosure for data centers appears to be compressing that curve, driven by litigation precedent and local political pressure rather than a slow policy consensus.
The source material underlying this analysis is from a single advocacy-focused publication, and the indirect water estimates cited draw on industry analyses rather than audited operator filings. Exact water intensity varies significantly by generation technology, operating region, and ambient conditions. What is not uncertain is the direction: court orders are creating disclosure precedent, legislators are drafting frameworks, and the question of who owns the upstream water embedded in every kilowatt-hour has moved from theoretical to litigable.
Sources
- Thebrockovichreport — The Data Center Water Secret (Link)
