Data center water use has become a bigger concern as AI infrastructure grows. But there’s a lot of confusion around how much water data centers actually use and whether AI data centers always consume more. 

The reality is that water use depends heavily on the cooling system, location, IT load, climate, and water source. 

Here are a few common myths worth looking at: 

  • Myth: Every data center uses large amounts of drinking water. 
  • Fact: Some facilities use reclaimed or recycled water, while others rely on different water sources. 
  • Myth: AI data centers always use more water. 

Fact: AI increases heat and power density, but actual water use depends on the cooling design. 

  • Myth: Liquid cooling means higher water consumption. 

Fact: Direct-to-chip liquid cooling can use a recirculating loop. Water consumption mainly depends on how the heat is ultimately rejected. 

  • Myth: Water withdrawal and water consumption are the same. 

Fact: Withdrawal is the amount taken from a water source, while consumption is the portion that isn’t returned for immediate reuse. 

So, what should data center teams look at? 

Water source, cooling technology, peak demand, local water availability, rack density, and the trade-off between water and energy efficiency all matter. 

There isn’t one number that tells the whole story. 

How much water does a data center use per day? Data center water usage depends on design

How much water does a data center use? No universal daily figure is defensible. IT load, cooling architecture, climate, WUE, water source, utilization, and electricity source change the answer. Berkeley Lab found more than a 10,000-fold spread in workload-level water use across various modeled conditions. The 2025 workload-level review shows why single-number estimates fail.

A transparent estimate starts with IT energy and site WUE. Using 0.36 L/kWh, close to Berkeley Lab’s modeled U.S. fleet average around 2023, a 10 MW IT load running for full 24 hours implies about 86,400 liters, or 22,800 gallons of water, per day. A 100 MW load implies about 864,000 liters, or 228,000 gallons. These are arithmetic examples, not typical-facility benchmarks. Data center water use changes with weather and cooling mode.

The question how much water a data center use per day needs assumptions. Dry cooling might use little cooling water on a mild day, while cooling towers consume more during hot periods. Annual averages also hide peak-day demand, which often matters most to utilities.

👉 Read the full blog to learn more about data center water use, cooling options, and the facts behind the common myths.