Beyond WUE: Assessing Data Center Water Resilience
Water stewardship claims and WUE scores don’t guarantee reliability under heatwaves or water shortages. A site-specific resilience assessment matters more.
Data centers are increasingly evaluated on Water Use Effectiveness (WUE) scores and water efficiency claims, but these metrics may not reflect how facilities perform during extreme conditions like heatwaves or local water shortages. A meaningful assessment of water resilience requires examining site-specific factors including how cooling systems perform under peak stress, local water availability and competing claims on water resources, and whether reclaimed water sources are actually accessible and suitable for use. The Imperial Valley case demonstrates this challenge, as a proposed data center initially planned to use reclaimed wastewater but later sought access to Colorado River water when alternatives proved unavailable. Understanding water resilience demands moving beyond average efficiency metrics to evaluate whether a facility can operate reliably without straining local water systems during periods of greatest demand.
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