What's Happening?
California's data centers are experiencing a significant increase in water consumption, with an estimated 13.2 billion gallons used in 2023, nearly double the 6.7 billion gallons consumed in 2019. This surge is primarily driven by the cooling demands
of thousands of computer servers, especially with the growing adoption of artificial intelligence (AI) workloads. A November 2025 study by Next 10, titled 'An Assessment of California Data Centers' Environmental and Public Health Impacts,' revealed that while direct on-site water consumption accounted for about 750 million gallons in 2023, the majority of the water footprint was associated with electricity generation. Many data centers utilize evaporative cooling systems, which are effective but require continuous water replenishment. The California Energy Commission reports over 200 active data centers in the state, and projections indicate that the total water footprint could reach between 19.7 billion and 30.8 billion gallons annually by 2028.
Why It's Important?
This escalating water consumption by data centers poses a critical challenge for California, a state already grappling with strained water resources due to droughts and increasing demand from agriculture, residential communities, and natural ecosystems. The significant water footprint of data centers, particularly the indirect consumption linked to electricity generation, highlights the broader environmental impact of the digital economy. Without proper oversight and transparent reporting, communities may struggle to understand the exact water usage of individual data centers and the potential effects of new developments on local supplies. This situation underscores the urgent need for sustainable practices and policies to ensure that technological growth does not compromise the state's vital water security.
What's Next?
The growth of AI is expected to further intensify the demand for data center resources, including water. A February 2026 report from UC Berkeley's Center for Law, Energy & the Environment points to gaps in California's data center water reporting and oversight, suggesting a need for improved transparency. Technology companies are encouraged to invest in recycled water systems, advanced cooling technologies, and energy efficiency to mitigate their environmental footprint. However, the report also notes that some water-saving cooling systems may increase electricity consumption, necessitating a holistic evaluation of both resources. The state will likely face increasing pressure to implement more robust regulations and planning strategies to manage the water demands of its expanding data center infrastructure.
Beyond the Headlines
The issue of data center water consumption in California extends beyond mere resource management; it touches upon the broader societal implications of technological advancement. The 'cloud' that powers AI and other digital services has a very tangible physical footprint, demanding significant amounts of water and energy. This raises questions about the environmental responsibility of tech giants and the need for sustainable innovation. The challenge lies in fostering economic growth through technology while ensuring responsible resource management and equitable access to essential services for all Californians. The situation also highlights the interconnectedness of energy and water systems, emphasizing that solutions must address both in tandem to achieve true sustainability.
