- Data centers generate significant heat, and cooling systems often use water (evaporative or closed-loop), raising concerns in Northern Nevada’s semi-arid, water-limited environment.
- Cooling technologies are advancing, and water demand can now be better tailored to local climate and available resources.
- Google reported that its Storey County data center uses no water for cooling (only domestic use), even at high energy loads — illustrating the potential for low-water or no-water cooling strategies.
- Data from three recently approved Reno data centers show an average water use of about 0.45 acre-feet per MW, substantially lower than earlier assumptions.
- The Oppidan facility uses evaporative cooling, resulting in higher water use — approximately 1.6 acre-feet per MW for computing equipment alone.
- This equates to roughly the annual water use of 8–16 single-family homes per MW of evaporative-cooled computing load.
- The Webb and Keystone data centers have much lower water demands, at approximately 0.07 and 0.29 acre-feet per MW, respectively, demonstrating wide variability based on technology choice.
- The data center industry uses standardized metrics such as Power Usage Effectiveness (PUE) and Water Usage Effectiveness (WUE) to assess energy and water tradeoffs.
- High PUE indicates inefficient use of power for cooling and overhead in addition to powering the computer systems themselves. When available, water used for cooling can reduce PUE and increase energy efficiency.
- The current Project of Regional Significance (PRS) review threshold of 625 AF would apply to approval requests for large water users, including data centers.
- Some water-based cooling for industrial uses like data centers can be met using treated effluent from our Region’s wastewater treatment facilities. Currently, the Tahoe-Reno Industrial Center (TRI) uses about 350 AF of treated effluent for cooling needs. The agreement with TRI allows for up to 4.000 acre feet of treated effluent to be delivered if available.
The table below shows recently approved data centers in the City of Reno with key statistics on building size, employment, water use, and energy demand (data courtesy of City of Reno planning staff).

Note: Variation in water use reflects differences in cooling technologies and facility design.