How Much Water Do Data Centers Consume?

Key Takeaways

✓ North American data centers used nearly 264 billion gallons (1 trillion liters) of water in 2025 — equivalent to New York City's entire annual water demand (Mordor Intelligence / Insurance Journal, December 2025)

✓ By 2027, global AI-driven data center water withdrawal is projected to reach 1.1–1.7 trillion gallons annually — 4 to 6 times Denmark's total annual water consumption (Cloud Computing News, 2025)

✓ Indirect water use through electricity generation adds an estimated 211 billion gallons (800 billion liters) per year on top of direct cooling consumption in the U.S. alone

✓ A single large hyperscale facility can consume up to 5 million gallons of water per day — as much as a city of 50,000 people

✓ Each 100-word AI prompt uses roughly 17.5 fl oz (519 ml) of water (UC Riverside) — multiplied across billions of daily queries, the cumulative demand is enormous

✓ About 30% of data centers being built today are located in regions where water scarcity is expected to intensify by 2050. (MSCI, 2025)

✓ Chemical-free water treatment technologies like Cavitation Non-Thermal Plasma™ (CNTP) can help data center operators treat and recycle cooling water, reducing freshwater intake without operational downtime

Short answer: North American data centers used nearly 264 billion gallons (1 trillion liters) of water in 2025 — roughly equivalent to the entire annual water demand of New York City (Mordor Intelligence, December 2025). That figure is only set to climb: by 2027, global AI-driven data centers alone are projected to account for 1.1 to 1.7 trillion gallons of water withdrawal annually. And direct cooling consumption is only part of the story — indirect water use through electricity generation adds an estimated 800 billion liters (211 billion gallons) on top in the U.S. alone.

As the global count of data centers surpasses 11,800 facilities (with an additional 47+ GW of capacity under construction as of late 2025) the pressure on freshwater supplies is becoming one of the defining infrastructure challenges of the AI era. Companies like Cavitation Technologies, Inc. (CVAT) have developed chemical-free water treatment systems specifically designed to help operators manage and recycle cooling water more sustainably, without adding chemicals or creating secondary waste.

1. Why Do Data Centers Need So Much Water?

Data centers house thousands of servers running 24/7. Those servers generate enormous amounts of heat, and that heat has to go somewhere.

The most common and cost-effective solution is evaporative cooling: cold water is circulated through the facility, absorbs heat from the servers, and then evaporates, thus carrying the heat away. It works well. But it consumes enormous volumes of water in the process.

There are two main types of cooling systems:

Air-cooled systems — use fans and chillers to remove heat. Lower water use, but higher electricity consumption.
Evaporative/water-cooled systems — use cooling towers where water evaporates to dissipate heat. More energy-efficient, but highly water-intensive.

The tradeoff is real: the more energy-efficient a data center's cooling system, the more water it tends to consume. And with newer hyperscale AI facilities requiring 10–40x the power of pre-2015 data centers (AGU Advances, 2026), this trend is becoming harder to ignore.

"Data centers typically evaporate about 80% of the water they draw."

— NASUCA, 2025

2. How Much Water Does a Typical Data Center Use?

The numbers vary significantly by facility size, cooling method, and climate, but the scale is striking.

Data Center Type	Daily Water Consumption
Mid-sized data center	Equivalent to a small town
Large hyperscale facility	Up to 5 million gallons/day
Google's Council Bluffs, Iowa facility (2024)	~2.7 million gallons/day
Google's Pflugerville, Texas (air-cooled, 2024)	~10,000 gallons/day
Average across all U.S. data centers	Varies widely by cooling method

Source: Lincoln Institute of Land Policy; Google 2024 Environmental Report

The gap between those two Google facilities illustrates the single biggest lever available to operators: cooling technology choice. The air-cooled Texas site uses roughly 270 times less water per day than its evaporatively cooled Iowa counterpart.

3. Major Tech Companies: Water Consumption By the Numbers

Google

Google's data center water consumption has grown significantly, driven by AI expansion:

2021: 4.3 billion gallons consumed
2024: 6.1 billion gallons consumed — a 42% increase from 2021 (Google 2025 Environmental Report)

Google withdrew a total of 7.8 billion gallons in 2024, consuming 78% of that through evaporation. Its largest facility, in Council Bluffs, Iowa, consumed 1 billion gallons in 2024 alone — enough to supply all of Iowa's residential water for five days.

Source: Google 2025 Environmental Report; MOST Policy Initiative, April 2026

Microsoft

Microsoft consumed approximately 1.69 billion gallons (6.4 million cubic meters) of water in 2022 — a 34% increase from the prior year, explicitly attributed to AI infrastructure scaling. The company operates more than 300 data centers worldwide and has set an average WUE target of 0.30 L/kWh. Starting in 2026, Microsoft is rolling out closed-loop water recycling systems that eliminate freshwater top-ups across new facilities.

Source: Cloud Computing News, July 2025; Water Education Foundation, September 2023

Equinix

Equinix, which operated 268 data centers worldwide in 2024, reported withdrawing 1.4 billion gallons and consuming 1.2 billion gallons — an 85% consumption rate.

Source: MOST Policy Initiative

Amazon

Amazon has committed to becoming water-positive by 2030. An investigation by SourceMaterial and The Guardian found that three of Amazon's proposed data centers in Spain are licensed to use approximately 755,720 cubic meters of water per year — enough to irrigate over 200 hectares of crops.

4. The AI Factor: How Artificial Intelligence Is Making the Problem Worse

AI workloads are fundamentally different from standard cloud computing. They require:

Higher rack densities — more processing power per square foot, generating more heat
More intensive cooling — pushing air-based cooling systems past their designed limits
Longer continuous operation — model training runs can last days or weeks without interruption

The numbers are striking. Training GPT-3 consumed an estimated 185,000 gallons (700,000 liters) of freshwater for direct cooling alone — and roughly 1.4 million gallons when including water used for electricity generation.

At the inference level (the billions of daily queries sent to ChatGPT, Gemini, Copilot, and other AI tools) researchers at UC Riverside estimated that each 100-word AI prompt consumes approximately 17.5 fl oz of water. Aggregated across billions of daily queries, inference now accounts for more total water consumption than the original training runs.

A peer-reviewed study published in December 2025 (Cell Reports Sustainability) estimated that AI systems' water footprint reached between 82.6 and 202 billion gallons in 2025 — comparable in scale to the global annual consumption of bottled water. Looking ahead, by 2027, global AI demand is projected to account for 1.1 to 1.7 trillion gallons of water withdrawal annually — four to six times Denmark's total annual water consumption.

Source: EESI; Cloud Computing News, July 2025

5. Direct vs. Indirect Water Consumption: What's the Difference?

When discussing data center water use, it's important to distinguish between two types of consumption:

Type	Definition	Scale (North America, 2025)
Direct consumption	Water used on-site for cooling towers and liquid systems	264 billion gallons / ~1 trillion liters
Indirect consumption (U.S.)	Water used to generate the electricity that powers the facility	211 billion gallons / ~800 billion liters
Total estimated footprint	Combined water footprint (U.S., LBNL baseline)	~228+ billion gallons

Source: Mordor Intelligence / Insurance Journal, April 2026; Lawrence Berkeley National Laboratory, 2016; MOST Policy Initiative, April 2026

Indirect consumption dwarfs direct use, yet it is rarely discussed in corporate sustainability reports. The water intensity of electricity generation varies dramatically by source: fossil fuel plants consume far more water per kilowatt-hour than solar or wind energy.

6. What Happens to the Water After Use?

Not all data center water simply disappears. There are three typical outcomes:

Evaporation — the most common outcome in cooling tower systems. The water is gone, carrying heat with it. On average, approximately 80% of all drawn water is lost this way and never returned to the water supply.
Discharge — used water is released back into local waterways or wastewater systems. However, it returns with higher concentrations of dissolved solids (calcium, chloride, silica), which can raise salinity, reduce aquatic oxygen levels, and affect downstream agriculture.
Recirculation — closed-loop systems cool and continuously reuse the same water rather than evaporating it. This dramatically reduces freshwater intake but requires effective water treatment to prevent buildup of contaminants and biofilm.

Source: MOST Policy Initiative

7. Geographic Hotspots: Where the Water Crisis Is Sharpest

Data center water demand is not evenly distributed. As of late 2025, about 30% of data centers currently under construction are located in regions where water scarcity is expected to intensify by 2050 (MSCI, 2025). Several areas are already under acute pressure:

Texas — Data centers in Texas were projected to use 49 billion gallons of water in 2025, rising to as much as 399 billion gallons by 2030 — enough to draw down Lake Mead by more than 16 feet in a single year (HARC / University of Houston).
Northern Virginia — Loudoun County, home to over 27 million sq ft of data center space, expected nearly $900 million in data center tax revenue in FY2025.
The Dalles, Oregon — Google's data centers consume roughly a third of all city water. A 13-month legal battle was required before usage data was made public.
Chile — An environmental tribunal partially revoked Google's data center permit in Santiago's Cerrillos district over water concerns, forcing a redesign with air cooling.
Netherlands — Permanently banned new hyperscale data centers above 70 MW, effective January 2024.
Arizona — Municipalities have imposed water caps on new data center development, forcing zero-water cooling commitments.

Source: Lincoln Institute of Land Policy; MSCI, 2025; ModulEdge

8. Mini-Case: Google's Council Bluffs, Iowa

Google's Council Bluffs campus in Iowa has become one of the most studied examples of data center water use — and a flashpoint in the debate over transparency.

In 2024, it withdrew an average of 3.9 million gallons per day and consumed 2.8 million gallons per day
Over the full year, the facility consumed 1 billion gallons — equivalent to Iowa's entire residential water supply for five days
The facility uses evaporative cooling towers, which explains its high consumption rate relative to air-cooled alternatives
By contrast, Google's air-cooled Pflugerville, Texas facility consumed just 10,000 gallons per day — illustrating the scale of difference that cooling technology choice makes

Source: Google 2024 Environmental Report

9. What Are Data Centers Doing to Reduce Water Use?

Emerging Cooling Technologies

Closed-loop cooling systems — Recirculate water rather than evaporating it. No continuous freshwater replenishment needed, but this requires water treatment to stay effective.
Direct-to-chip liquid cooling — Delivers coolant directly to processors, significantly reducing the volume of water needed to manage heat.
Immersion cooling — Servers submerged in dielectric fluid. Highly energy-efficient but introduces a new challenge: fluid degrades over time, requiring treatment or replacement.
Air-based mechanical cooling — Lower water use but higher electricity consumption. Best suited to cooler climates.

Policy and Regulatory Pressure

The EU requires data centers above 500 kW to report water usage annually
In 2025, over 190 data center-related bills were introduced across U.S. state legislatures
Between March and June 2025 alone, community opposition led to $98 billion in data center projects being blocked or delayed (Data Center Watch)

10. How Advanced Water Treatment Can Help

One of the most effective and underutilized approaches to data center water sustainability is not reducing consumption alone, but treating and recycling cooling water continuously so that the same water can be reused rather than discharged or evaporated.

This is an area where Cavitation Technologies, Inc. (OTCQB: CVAT) — a nanotechnology company founded in 2007 and holding over 40 patents — has developed a purpose-built solution: Cavitation Non-Thermal Plasma™ (CNTP). CNTP is the company's newest technology and, notably, the world's first plasma-based water treatment system that is scalable for industrial applications — a milestone no other company has achieved. CNTP is a chemical-free, flow-through system that purifies and regenerates industrial process water at the molecular level, and is already in active pilot installations.

How It Works

CNTP combines two simultaneous mechanisms in a single compact system:

Hydrodynamic Cavitation — Water flows through a nano-reactor, creating rapid pressure changes that generate and collapse microscopic bubbles. This produces hydroxyl radicals (OH·) that break down organic and inorganic contaminants.
Non-Thermal Plasma — Simultaneously generates additional reactive species including hydrogen peroxide (H₂O₂) and further hydroxyl radicals, eliminating microorganisms and complex pollutants without any chemical additives.

Why This Matters for Data Center Cooling Water

Cooling water in data centers degrades over time in several predictable ways:

Total Dissolved Solids (TDS) accumulate — increasing conductivity, scaling risk on heat exchangers, and reducing cooling efficiency
Biofilms form on cooling tower surfaces — reducing performance and typically treated with chemical biocides
Organic contaminants build up — raising discharge compliance concerns and operational costs

CNTP addresses all of these simultaneously and continuously:

Reduces TDS (Total Dissolved Solids) and lowers turbidity
Eliminates bacteria, viruses, and biofilms — without any chemical additives
Reduces water conductivity
Breaks down organic and inorganic compounds, extending the usable life of cooling water
Currently operates at 20 GPM and is scalable to a larger flow, making it suitable for integration into existing cooling loop systems
Has demonstrated TDS reduction from 65,000+ PPM to under 1,000 PPM in comparable industrial applications
100% chemical-free

"I foresee ten years down the line that plasmas will become a bit more mainstream in water treatment, just like UV light is now almost standard in most wastewater plants."

— John Foster, Professor of Nuclear Engineering and Radiological Sciences, University of Michigan

Learn more at cvatinfo.com or hydroplasma.tech.

11. Water Usage Effectiveness (WUE): The Key Metric

WUE measures liters of water consumed per kilowatt-hour of IT load — the water equivalent of Power Usage Effectiveness (PUE) for energy. A lower WUE indicates a more water-efficient facility.

WUE Value	What It Means
~1.9 L/kWh	Industry average (EESI, 2024)
0.2–0.5 L/kWh	Modern efficient facilities
0.30 L/kWh	Microsoft's stated average target
0 L/kWh	Ideal — only achievable with full air cooling

Source: EESI; ModulEdge; Malota Studio

WUE remains largely invisible in corporate sustainability reporting compared to PUE — a gap regulators are beginning to close. The EU's new mandatory reporting requirements for facilities above 500 kW represent the first major step toward standardized, comparable water efficiency data across the industry.

FAQ

How much water does a data center use per day?

It varies enormously by size and cooling method. A mid-sized facility uses water equivalent to a small town. Large hyperscale facilities can consume up to 5 million gallons per day. Google's most water-intensive U.S. data center averaged 2.7 million gallons per day in 2024.

Why do data centers use so much water?

Primarily for cooling. Servers generate continuous heat, and evaporative cooling — where water absorbs heat and evaporates — is among the most energy-efficient removal methods. The tradeoff is high water consumption: approximately 80% of all drawn water is lost through evaporation.

How does AI increase data center water use?

AI workloads generate significantly more heat per rack than conventional computing. This pushes cooling systems harder. Microsoft reported a 34% increase in water consumption tied directly to AI infrastructure. Research at UC Riverside found that each 100-word AI prompt consumes roughly 17.5 fl oz of water — a figure that adds up rapidly across billions of daily queries.

What is Water Usage Effectiveness (WUE)?

WUE measures liters of water consumed per kilowatt-hour of IT load. The industry average sits at approximately 1.9 L/kWh. Modern efficient facilities can achieve 0.2–0.5 L/kWh. A score of 0 is the theoretical ideal, achievable only with full air cooling.

How much water does the U.S. data center industry use in total?

North American data centers used nearly 264 billion gallons (1 trillion liters) of water in 2025, according to Mordor Intelligence (April 2026) — roughly equivalent to New York City's entire annual demand. Adding indirect consumption through electricity generation pushes the U.S. total estimated footprint to over 228 billion gallons for cooling alone. By 2027, global AI-driven demand is projected to reach 1.1–1.7 trillion gallons annually.

Can data center cooling water be treated and reused?

Yes. Closed-loop systems that continuously recirculate and treat cooling water are one of the most effective strategies for reducing freshwater intake. Chemical-free technologies like Cavitation Non-Thermal Plasma™ (CNTP) from Cavitation Technologies, Inc. are designed specifically for this application — removing dissolved solids, biofilms, and organic contaminants to extend water usability without chemical additives.

Which states are most affected by data center water consumption?

Texas, Virginia, and Arizona face the most acute pressure. Texas data centers were projected to consume 49 billion gallons in 2025 and up to 399 billion gallons by 2030. Arizona municipalities have already imposed water caps forcing zero-water cooling commitments on new developments.

Are any countries restricting water-intensive data centers?

Yes. The Netherlands permanently banned new hyperscale data centers above 70 MW in January 2024. Singapore has set mandatory WUE targets for new builds. Chile partially revoked a Google data center permit over water concerns. In the U.S., community opposition blocked or delayed $98 billion in projects between March and June 2025 alone.

Cavitation Technologies, Inc. (OTCQB: CVAT) designs and manufactures chemical-free, flow-through nanotechnology systems for fluid processing across water treatment, agriculture, pharmaceuticals, semiconductors, and industrial applications. The company holds over 40 patents issued domestically and internationally. Learn more at cvatinfo.com | hydroplasma.tech | Twitter/X | LinkedIn

2026-05-20 01:07