Making Data Centers Less Water-Intensive: Finding the Right Balance
The rapid acceleration of digital transformation, cloud adoption, and the rise of artificial intelligence has led to an unprecedented expansion of data center infrastructure. Facilities are being developed at a remarkable pace to support growing digital demand. Recent market indicators highlight this surge:
-
Colocation vacancy rates have dropped to around 2.3%, compared with 9.8% in 2020.
-
The data center construction pipeline has increased nearly tenfold between 2020 and 2025, with a large portion of capacity already pre-leased.
-
Market valuations within the sector have grown by over 160% during the same period.
While this expansion reflects the increasing reliance on digital services, it also brings significant environmental challenges. One of the most pressing concerns is water consumption. A large data center can consume as much water daily as a town of roughly 50,000 residents, primarily for cooling systems. As facilities expand into regions with limited freshwater resources, communities and regulators are increasingly raising concerns about sustainability and resource management.
The Cooling Challenge
Data centers must effectively cool both their IT equipment areas (often called white space) and the supporting infrastructure (gray space). As computing densities rise, maintaining stable temperatures becomes even more critical.
Emerging cooling approaches such as immersion cooling and direct-to-chip cooling are gaining attention for high-density computing environments. However, the broader infrastructure surrounding the IT equipment still relies heavily on either air-based or water-based heat exchange systems.
Air-based cooling systems use fans and refrigerant coils to remove heat from circulating air. These systems typically consume electricity rather than water to perform the cooling process.
Shifting the Resource Burden
While air-based cooling may reduce water consumption within the data center facility itself, it can unintentionally shift the environmental burden elsewhere. Increased reliance on electrically driven cooling systems significantly raises power demand—sometimes doubling or even tripling energy consumption compared with water-based cooling approaches.
Higher electricity demand often requires additional power generation capacity. Many power plants rely on large cooling towers that use significant volumes of water to dissipate heat during electricity production. As a result, the total water footprint may simply move upstream to the power generation process rather than being eliminated.
This creates a complex sustainability challenge: reducing water use at the facility level may increase resource consumption elsewhere in the energy supply chain.
Cooling Strategies Based on Scale
Achieving sustainable cooling requires solutions tailored to the size and power capacity of the facility.
Large-scale facilities with power capacities reaching hundreds of megawatts may benefit from exploring on-site power generation or microgrid solutions. These systems can provide several advantages:
-
Reduced transmission losses during power delivery
-
Lower stress on regional power grids
-
Greater flexibility in integrating efficient cooling technologies
Such localized power solutions may also allow experimentation with emerging technologies, including hydrogen-based energy systems or advanced renewable integrations, though these solutions are still evolving for large-scale deployments.
Regional and edge data centers, operating at moderate power levels, can often achieve efficiency through optimized water-based cooling systems designed specifically for their scale. Modern cooling tower technologies can improve resource utilization, reduce operational risks, and simplify installation while maintaining effective thermal performance.
Micro data centers, which can range from the size of a large cabinet to a shipping container, typically rely on air-based cooling due to their smaller thermal loads. In these cases, traditional cooling towers would significantly exceed the required capacity.
Planning for Long-Term Sustainability
True sustainability requires a holistic approach rather than shifting resource consumption from one system to another. Effective strategies must aim to reduce both water use and energy demand simultaneously, ensuring that efficiency gains in one area do not create unintended environmental impacts elsewhere.
As the industry continues to evolve, long-term planning and investment in innovative cooling technologies, renewable energy integration, and resource-efficient infrastructure will be essential. Until highly sustainable energy sources become widely available at scale, data center operators must prioritize balanced solutions that responsibly manage both water and power consumption.
Achieving this balance will be key to supporting the continued growth of digital infrastructure while protecting the natural resources on which it depends.
Building sustainable data centers requires the right expertise and technology. PRASA supports organizations in developing efficient, future-ready infrastructure that optimizes cooling performance while reducing environmental impact.
Connect with our experts to explore how we can help power your next data center project. Contact here: marketing@prasa-pl.com or +918806660084
