U.S. data centers directly drank 17.4 billion gallons of water in 2023, and a single large facility can use up to 5 million gallons a day. That is enough water for a town of 30,000 to 50,000 people, running around the clock to keep servers from overheating.
The number is climbing fast. AI has pushed water demand so hard that direct consumption is projected to more than double by 2028. Yet data centers still account for only about 0.2% of all U.S. water use, and the fight over that water is playing out one county at a time. Here are 58 sourced statistics on how much water data centers use, where it goes, and why it has become one of the most contested numbers in tech.
Key Takeaways
- U.S. data centers directly consumed 17.4 billion gallons of water in 2023, roughly what 160,000 American households use, and that figure is projected to reach 38 to 73 billion gallons by 2028.
- A large data center can use up to 5 million gallons a day. The average site uses about 300,000 gallons a day, while a modern air-cooled facility uses almost none. Cooling design, not size, decides the number.
- Most of the water is hidden. Direct cooling used 17.4 billion gallons in 2023, but the power plants supplying data centers consumed about 211 billion gallons, roughly 12 times more.
- AI is the accelerant. U.S. data centers used an estimated 264 billion gallons of water in 2025 with the electricity behind them counted, and demand keeps climbing as AI sites open in water-scarce regions.
- It is a local problem, not a national one. Data centers are about 0.2% of U.S. water use, but roughly 40% sit in high water-stress areas, which has triggered moratoriums in more than 50 cities.
How Much Water Does a Data Center Use?
A large data center uses 1 to 5 million gallons of water per day for cooling. The average facility uses about 300,000 gallons a day, a medium site uses up to 110 million gallons a year, and a fully air-cooled data center uses almost none. The range is enormous because it depends entirely on the cooling system and the local climate.
| Facility type | Approximate water use | Household equivalent |
|---|---|---|
| Air-cooled | Near zero | 0 |
| Average data center | ~300,000 gallons/day | ~1,000 households/day |
| Medium (10 to 20 MW) | ~110 million gallons/year | ~1,000 households/year |
| Large hyperscale (~100 MW) | Up to 5 million gallons/day (1.8 billion/year) | ~16,000 households/day |
1. A large data center can use up to 5 million gallons of water per day, or about 1.8 billion gallons a year, according to the Environmental and Energy Study Institute. That single-day figure matches the daily water use of a town of 30,000 to 50,000 residents.
2. The average data center consumes about 300,000 gallons of water per day for cooling, the equivalent of roughly 1,000 households, per the University of Georgia College of Agricultural and Environmental Sciences.
3. A medium-sized data center can consume up to 110 million gallons of water a year, about what 1,000 households use annually, according to the Environmental and Energy Study Institute.
4. A single hyperscale facility using 5 million gallons a day uses as much water as more than 16,000 average U.S. households, Consumer Reports found.
5. Roughly 80% of the water withdrawn by an evaporative-cooled data center is lost to evaporation and never returned, according to the research paper Making AI Less Thirsty. This is why “water use” and “water consumption” are not the same thing.
6. Enterprise data centers consume 300,000 to 500,000 gallons of water per day on average, and demand can nearly triple during hot summer months, according to Nature Forward.
7. Streaming one hour of high-definition video uses an estimated 0.1 to 3 gallons of water at the data centers behind it, per the University of Georgia.
How Much Water Do U.S. Data Centers Use in Total?
U.S. data centers directly consumed 17.4 billion gallons of water in 2023, according to Lawrence Berkeley National Laboratory. That is a small share of national water use, but it is rising quickly as AI expands. For the electricity side of the same story, see our data center energy consumption statistics.
8. U.S. data centers directly consumed 17.4 billion gallons of water in 2023, equal to the water used by about 160,000 American households, according to Lawrence Berkeley National Laboratory.
9. Direct water consumption is projected to rise to between 38 and 73 billion gallons a year by 2028, per Lawrence Berkeley National Laboratory.
10. On-site water use at U.S. data centers could increase two to four times between 2023 and 2028, reaching roughly 150 to 280 billion liters, the same report projects.
11. As of 2021, U.S. data centers consumed an estimated 449 million gallons of water per day, or 163.7 billion gallons a year, according to research published in Nature.
12. The roughly 449 million gallons a day that U.S. data centers use directly is only about 0.14% of total U.S. water consumption, which runs near 322 billion gallons a day, per the University of Georgia.
13. As of 2016, fewer than one-third of data center operators tracked their water consumption at all, according to the Uptime Institute. Poor disclosure is why national totals still vary so widely.
The Hidden Water Footprint: Power Plants and Chips
Most of a data center’s water is used somewhere else. The electricity that powers the servers is generated at power plants that consume far more water than the cooling towers do, and the chips inside require millions of gallons to manufacture.
14. Power plants supplying U.S. data centers consumed an estimated 211 billion gallons of water in 2023, according to the Environmental and Energy Study Institute. That is about 12 times the 17.4 billion gallons used directly for cooling.
15. Indirect water use runs about 1.2 gallons per kilowatt-hour of data center electricity, the same source estimates.
16. Coal power plants consume about 19,185 gallons of water per megawatt-hour, and natural gas plants about 2,800 gallons, according to the U.S. Energy Information Administration.
17. About 56% of the electricity used to power U.S. data centers comes from fossil fuels, according to a research analysis of the environmental burden of U.S. data centers, which ties data center power to water-intensive generation.
18. A typical chip-fabrication plant uses about 10 million gallons of ultrapure water a day, as much as 33,000 U.S. households, according to the World Economic Forum.
19. Producing one gallon of the ultrapure water used to make chips takes about 1.5 gallons of regular water, according to the World Economic Forum, adding to the supply-chain water cost of every server.
Cooling Systems Decide How Much Water a Data Center Uses
The cooling system is the single biggest factor in how much water a data center uses, and it is a direct tradeoff with electricity. Evaporative systems use a lot of water and little power. Air-cooled systems use almost no water but more power, which pushes water use back upstream to the power plant.
| Cooling type | Water profile | Tradeoff |
|---|---|---|
| Evaporative / open-loop | 70 to 80% of withdrawal consumed | Lowest energy, highest water |
| Closed-loop | Only 5 to 10% of withdrawal consumed | Cuts freshwater up to 70% |
| Air-cooled | Near zero on-site water | More electricity, higher indirect water |
| Immersion / direct-to-chip | Near zero evaporation | Highest efficiency, newest |
20. Roughly 75% to 90% of data centers worldwide rely on water-based cooling as their primary method, according to the Florida Water and Pollution Control Operators Association.
21. In evaporative cooling, 70% to 80% of the water is lost as evaporation, while the remaining 20% to 30% is discharged as wastewater, per Making AI Less Thirsty.
22. A closed-loop data center may consume only 5% to 10% of its water withdrawal, because the same water recirculates instead of evaporating, according to the Florida Water and Pollution Control Operators Association.
23. Closed-loop and circular water systems can reduce a data center’s freshwater use by up to 70%, according to the World Economic Forum.
24. The average data center reports a Water Usage Effectiveness of about 1.9 liters per kilowatt-hour, according to Data Center Knowledge. A perfect score is zero, which only air-cooled sites approach.
25. About 57% of the direct water used by data centers is potable drinking water, according to research published in Nature. Drawing treated drinking water for cooling is the core of most community objections.
26. At Microsoft data centers, evaporative cooling only switches on when outdoor temperatures exceed 85°F, and the water then cycles through the system two to five times before leaving, per Microsoft.
AI and Water: Does ChatGPT Really Waste It?
AI is the fastest-growing driver of data center water use, but the popular “a bottle of water per email” claim is misleading. The real per-query number is small and shrinking, even as the total water used by AI grows quickly. For more on AI infrastructure specifically, see our AI data center statistics.
27. U.S. data centers were estimated to consume around 264 billion gallons of water in 2025 once the electricity powering them is counted, a total AI demand is pushing higher every year, according to research firm Mordor Intelligence.
28. About 30 minutes of AI use consumes roughly 0.16 gallons of water, close to a standard water bottle, according to a Xylem water-technology report.
29. Every 20 to 50 ChatGPT queries consume the equivalent of a 500-milliliter bottle of water, according to the peer-reviewed paper Making AI Less Thirsty in Communications of the ACM.
30. Generating a single 100-word AI response is estimated to use about 519 milliliters of water, roughly one bottle, because a full response runs far more computation than a short query, based on University of California research cited by the Environmental and Energy Study Institute.
31. More recent 2025 estimates put a typical GPT-4 query far lower, at about 15 milliliters of water, and only 5 milliliters inside the data center itself, according to updated analysis reported by Undark, which also notes OpenAI’s own claim of roughly one-fifteenth of a teaspoon per query.
32. Training GPT-3 in U.S. data centers was estimated to consume 5.4 million liters of water total, including 700,000 liters on-site, per Making AI Less Thirsty.
33. Global AI demand could drive annual water withdrawals of 1.1 to 1.7 trillion gallons by 2027, according to the University of California, Riverside researchers behind the Making AI Less Thirsty analysis.
34. More than 160 new AI data centers were built across the U.S. in three years, a 70% increase, and many sit in water-scarce regions, according to Bloomberg.
Which Companies Use the Most Data Center Water?
Google is the largest disclosed data center water user, Microsoft has moved most of its fleet to low-water cooling, and Amazon runs the lowest reported Water Usage Effectiveness of the major cloud providers. The numbers below come from each company’s own environmental reporting, though independent reporting suggests real totals are often higher.
| Company | Disclosed water use | Water Usage Effectiveness | Reclaimed / recycled water |
|---|---|---|---|
| 7.7 billion gallons (2024) | Not standardized | 25%+ of campuses | |
| Microsoft | Water positive in 2025 | 0.30 L/kWh (2024) | ~90% low/zero-water fleet |
| Meta | 813 million gallons (2023) | Not standardized | Restoration projects |
| Amazon (AWS) | Water-positive target 2030 | 0.12 L/kWh (2025) | 24 sites, growing to 120+ |
35. Google’s data centers consumed 7.7 billion gallons of water globally in 2024, up from more than 6 billion gallons in 2023, according to Google’s environmental reporting.
36. About 31% of Google’s freshwater withdrawals came from watersheds with medium or high water scarcity, per the same reporting, as summarized by the Lincoln Institute of Land Policy.
37. Google’s single data center in Council Bluffs, Iowa withdrew an average of 3.9 million gallons and consumed 2.8 million gallons of water per day, according to the MOST Policy Initiative.
38. Microsoft says it reduced its data center water-use intensity by 25% against a 2022 baseline and now runs about 90% of its 2025 fleet on low-water or zero-water cooling, according to Data Center Dynamics.
39. Microsoft reported an average Water Usage Effectiveness of 0.30 liters per kilowatt-hour, down 39% from 0.49 in 2021, per Data Centre Magazine.
40. Amazon Web Services reported a global Water Usage Effectiveness of 0.15 liters per kilowatt-hour in 2024, improving to 0.12 in 2025, among the lowest of any major cloud provider, according to Amazon.
41. Amazon uses recycled water for cooling at 24 data centers and plans to expand to more than 120 by 2030, saving an estimated 530 million gallons of fresh water a year, per the same disclosure.
42. Meta consumed 813 million gallons of water globally in 2023, with 95% used in its data centers, and its restoration projects returned more than 1.59 billion gallons in 2024, according to Meta.
43. Google uses reclaimed or non-potable water at more than 25% of its data center campuses and has pledged to replenish 120% of the freshwater it uses by 2030, according to Google’s environmental reporting.
Where Data Centers Strain Local Water
Data center water use is a local issue before it is a national one. A handful of counties in Virginia, Texas, Georgia, Arizona, and Oregon carry most of the strain, and many of them are already short on water. For the broader buildout, see our data center growth statistics.
44. Data centers in Northern Virginia consumed close to 2 billion gallons of water in 2023, a 63% increase from 2019, according to the Financial Times.
45. Loudoun County, Virginia, home to about 200 data centers, used roughly 1 billion gallons of mostly potable water in 2023, about 2.75 million gallons a day, per the University of Georgia.
46. Data centers make up about 3% of all water consumption in the Potomac River Basin, according to Nature Forward.
47. Data centers in Texas are projected to use 49 billion gallons of water in 2025 and as much as 399 billion gallons by 2030, according to a Houston Advanced Research Center study.
48. A single Meta data center in Newton County, Georgia uses 500,000 gallons of water a day, about 10% of the entire county’s water use, and newer permits allow up to 6 million gallons a day, according to the New York Times.
49. Data centers in Arizona used an estimated 905 million gallons of water in 2025, and the Tucson City Council voted to reject the Project Blue data center complex over water concerns, per the Manhattan Institute and Fortune.
50. A Google data center in The Dalles, Oregon consumed more than 25% of the city’s total water supply in 2021, according to records reported by The Oregonian.
51. About 40% of U.S. data centers are located in areas of high or extreme water stress, according to Business Insider.
52. As of mid-2026, nearly 63% of the U.S. was experiencing drought conditions while AI data centers expanded, according to the U.S. Drought Monitor.
53. More than 50 American cities have enacted bans or moratoriums on new data center construction, many citing water, according to Fortune.
Is Data Center Water Use Actually a Problem?
Both things are true at once: data center water use is small nationally and serious locally. The national share is tiny next to farms and lawns, but the water is often treated drinking water, drawn from a few stressed regions, which is what turns a rounding error into a local crisis.
54. Data centers account for roughly 0.2% of total U.S. freshwater consumption, most of it indirect through electricity, according to the Manhattan Institute.
55. Americans use more than 500 billion gallons of water a year to irrigate golf courses and over 2 trillion gallons on lawns, far more than data centers use, per figures compiled by the Lincoln Institute of Land Policy from Golf Course Superintendents Association and EPA data.
The counterargument is location. A golf course in a wet state is not the same as a hyperscale campus pulling potable water from a desert aquifer. Water is local, and about 40% of U.S. data centers sit where it is already scarce. The honest read: the national total is not the emergency, but the concentration in drought zones is real, and weak historical tracking let it grow unwatched.
How Data Centers Are Cutting Water Use
Operators are cutting water use through reclaimed water, closed-loop cooling, air and liquid cooling that use almost no water, and replenishment pledges. The gains are real, though they often shift the cost to electricity.
56. Microsoft has begun designing data centers that consume zero water for cooling by circulating liquid directly to each chip in a closed loop, which eliminates evaporation, according to Data Centre Magazine.
57. A Microsoft water-reuse project in Quincy, Washington cut potable water use by 97% and returns 1.5 million cubic meters of water a year for community use, according to Microsoft.
58. Design changes cut water use at Microsoft’s Phoenix-area desert data centers by up to 60%, according to Data Center Frontier.
The physics of these fixes matter for anyone building or retrofitting a facility. Liquid cooling and direct-to-chip designs change what runs through the white space, and the higher rack densities they enable demand more from the structured cabling and fiber backbone underneath. Water efficiency and infrastructure design are now part of the same conversation.
Frequently Asked Questions
How much water does a data center use per day?
A data center uses anywhere from near zero to 5 million gallons of water per day. The average site uses about 300,000 gallons a day, a large hyperscale facility can use up to 5 million gallons a day, and a fully air-cooled data center uses almost none. The cooling system and local climate drive the difference.
Do data centers recycle water?
Yes, and it is becoming standard. Closed-loop systems recirculate the same water and can cut freshwater use by up to 70%. Major operators also use reclaimed or non-potable water: Google at more than 25% of its campuses, Amazon at 24 data centers expanding to over 120 by 2030, and Microsoft’s Quincy site cutting potable use by 97%.
Why don’t data centers use ocean or sea water?
Most data centers avoid seawater because salt corrodes cooling equipment, marine organisms foul the pipes, and few large facilities sit close enough to the coast to make it practical. Discharging warm saltwater also requires environmental permits. A small number of coastal projects do use seawater cooling, but it remains the exception.
How much water does ChatGPT use?
Estimates range widely and are shrinking as the science improves. Early University of California research put a long 100-word response at about 519 milliliters, roughly a bottle, and 20 to 50 shorter queries at the same bottle. More recent 2025 estimates put a typical GPT-4 query far lower, at about 15 milliliters, with only 5 milliliters used inside the data center itself.
How much water do Amazon data centers use?
Amazon does not publish a single national gallons figure, but it reports the lowest Water Usage Effectiveness of the major cloud providers, at 0.12 liters per kilowatt-hour in 2025. It uses recycled water at 24 data centers, plans to reach more than 120 by 2030, and has committed to becoming water-positive by 2030.
The Bottom Line
Data center water use is a real number that is easy to exaggerate in both directions. The U.S. total was 17.4 billion gallons directly in 2023 and is heading toward 38 to 73 billion by 2028, yet that is still a fraction of what the country pours on lawns and golf courses. What makes it matter is where the water comes from: treated drinking water, pulled from a few fast-growing regions that are already in drought. Cooling design and location decide whether a data center is a quiet neighbor or a front-page fight.
The infrastructure choices that lower water use, from liquid cooling to higher-density racks, also reshape the cabling and connectivity inside the building. The Network Installers engineers and installs the commercial structured cabling and fiber optic backbones that high-density facilities depend on, with BICSI-certified technicians and more than 19 years of nationwide project work. When a build or retrofit changes what runs through the white space, talk with the team about the infrastructure underneath.
Sources
- Lawrence Berkeley National Laboratory: U.S. Data Center Energy Usage Report
- Environmental and Energy Study Institute: Data Centers and Water Consumption
- University of Georgia College of Agricultural and Environmental Sciences: How Data Centers Impact Surface and Ground Waters
- Consumer Reports: AI Data Centers and Their Impact
- Making AI Less Thirsty (research paper)
- Environmental Burden of United States Data Centers in the AI Era (research paper)
- Nature: The Environmental Footprint of Data Centers
- Uptime Institute: Don’t Ignore Water Consumption
- U.S. Energy Information Administration: Water Use at Power Plants
- World Economic Forum: The Water Challenge for Semiconductor Manufacturing
- World Economic Forum: Circular Water Solutions for Data Centres
- Florida Water and Pollution Control Operators Association: Myths vs. Reality on Data Centers and Water
- Data Center Knowledge: A Guide to Water Usage Effectiveness
- Microsoft: Understanding Water Use at Microsoft Datacenters
- Communications of the ACM: Making AI Less Thirsty
- Undark: Reassessing AI’s Water Footprint
- Bloomberg: AI Data Centers and Water
- Google: Environmental Report
- Lincoln Institute of Land Policy: The Land and Water Impacts of Data Centers
- MOST Policy Initiative: Data Center Water Use
- Data Centre Magazine: Microsoft Zero-Water Cooling
- Data Center Dynamics: Microsoft Water Positivity Across Data Center Operations
- Amazon: Data Center Water Usage
- Meta: Advancing Water Stewardship
- Financial Times: Northern Virginia Data Center Water Use
- Nature Forward: Data Centers and Water Use
- Houston Advanced Research Center: Powering Texas’s Digital Economy
- New York Times: Meta Data Center Water Use
- Manhattan Institute: The Data Center Water Panic
- Fortune: Data Center Water Wars
- The Oregonian: Google’s Water Use in The Dalles
- Business Insider: Data Centers and the Water Crisis
- Mordor Intelligence: United States Data Center Water Consumption Market
- Xylem: Watering the New Economy
- U.S. Drought Monitor
- Data Center Frontier: Microsoft Aims to Slash Data Center Water Use
