The world of data centers is facing a critical challenge: water scarcity. As the demand for data storage and processing soars, particularly with the rise of AI, tech giants are grappling with the environmental and ethical implications of their operations. The issue is not just about the amount of water used, but also the potential strain on local water resources and the broader environmental impact.
One of the primary concerns is the use of water for cooling server racks, a process that generates massive amounts of heat. Evaporative cooling, a popular method, uses fresh water to absorb heat, which is then transferred to cooling towers for evaporation. While this technique can reduce energy costs and emissions, it comes with a significant water footprint.
For instance, Google's Council Bluffs facility in Iowa consumed over 1 billion gallons of water in 2024. Lawrence Berkeley National Laboratory predicts that hyperscale data centers could consume up to 33 billion gallons of water by 2030 if they continue to rely heavily on evaporative cooling. This is a significant concern, especially in regions with limited water resources, where data centers could exacerbate an already strained supply.
The situation is further complicated by the fact that water use is becoming a contentious issue. A Gallup poll revealed that seven out of ten Americans oppose data center development, with water scarcity as the top resource concern. This public resistance is forcing tech companies to reassess their water usage and explore alternative cooling methods.
Some tech giants, like Microsoft, OpenAI, and Oracle, have made public commitments to move away from evaporative cooling. This shift is particularly notable in water-stressed regions, such as Texas, where these companies are expanding their operations. However, Google has taken a different approach, focusing on water replenishment and recycling.
Google's strategy includes investing in local water projects to replenish freshwater, scaling up the use of reclaimed and recycled water, and disclosing annual water use in data centers. Ben Townsend, Google's global head of infrastructure and sustainability, emphasizes the need for a tailored approach to data center design, considering the varying water availability in different regions.
Despite these efforts, the challenge remains significant. Even as companies transition away from evaporative cooling, they face internal and external pressures. For example, Microsoft's water use is projected to increase, and Google had to pause plans for a data center in Chile due to water concerns. The industry is also under scrutiny for its water usage, with companies like Google being sued for failing to disclose water usage.
The key to addressing this issue lies in a multi-faceted approach. As Priscilla Johnson, a former Microsoft water strategy director, suggests, companies must be challenged to design more efficient systems that use less water and energy. Public pushback and regulation are essential to driving this change, ensuring that the data center industry becomes more sustainable and environmentally responsible.
