Skip to main content
Skip to main content
Microsoft in your community

Understanding energy use and sustainability investments at the Arizona datacenters

In each building at every campus and datacenter, sustainability is a key priority for Microsoft across all phases of a project— from site selection to design and construction to operations and decommissioning.  Microsoft datacenters, including our facilities in Arizona, are key to our sustainability goals.

Carbon negative by 2030

Microsoft operates datacenters near Goodyear and El Mirage, and we are expanding these sites during the next three years. For our datacenters in this region, Microsoft is procuring approximately 55 percent renewable energy from wind, solar, and hydro resources. We have signed power purchase agreements with AES and Longroad Energy.

Power usage effectiveness (PUE) measures cloud energy efficiency. The calculation is total power consumption divided by IT power consumption. A lower PUE score indicates more energy efficient datacenters, with a PUE of 1.0 being the best score. Our datacenter facilities in Phoenix have a design average PUE of 1.15 for the operational datacenters and new datacenters will have a design average PUE of 1.12.

Globally, Microsoft datacenters use fossil fuel generators for backup power and account for less than 1 percent of our overall emissions. In Phoenix and other specific regions, Microsoft is piloting running backup generators with renewable blend, cleaner-burning fuels, and is also piloting the replacement of datacenter generators with long-duration batteries.

Leadership in Energy and Environmental Design (LEED) is the world’s largest green building certification program. LEED provides the framework for healthy, highly efficient, and cost-saving green buildings with lower carbon emissions. LEED certification is a globally recognized symbol of sustainability achievement and leadership. All the datacenters in Phoenix will be LEED Gold certified.

Microsoft operations in Arizona comply with applicable air quality requirements.

Water positive by 2030

Water usage effectiveness (WUE) is another key metric relating to the efficient and sustainable operations of our datacenters and is a crucial aspect as we work towards our commitment to be water positive by 2030. WUE is calculated by dividing the number of liters of water used for humidification and cooling by the total annual amount of power (measured in kWh) needed to operate our datacenter IT equipment.

Microsoft uses outdoor air with direct evaporative cooling at our Phoenix datacenters. This method of cooling uses outside air and zero water for cooling when temperatures are below 29.4 degree Celsius, reducing water for cooling to less than 50 percent of the year. This system is highly efficient, using less electricity and a fraction of water used by other water-based cooling systems, such as cooling towers.

For our datacenters in Arizona, the operating WUE during 2021 was 2.69 L/kWh. This higher operating WUE is typical with newly operational datacenters, like in Phoenix, as it takes some time to gain efficiencies with power and water usage.

Zero waste by 2030

Microsoft has a goal to achieve 90 percent diversion of datacenter operational waste by 2030. To reach this goal, we’re working closely with our waste haulers to optimize waste diversion programs across our global datacenter portfolio. We have achieved Zero Waste certifications for our San Antonio, Texas; Quincy, Washington; Boydton, Virginia; and Dublin, Ireland datacenter locations.

In 2020, we opened our first Microsoft Circular Center in our North Holland datacenters, which is designed to extend the life cycle of servers through reuse and to support a circular economy for the Microsoft Cloud. Because it takes five to six years from when a datacenter is operational to generate reusable assets, we are planning an Arizona Circular Center to open once the new datacenters are in use and servers are ready to be decommissioned. Microsoft Circular Centers are able to process 12,000 servers per month for reuse.

Globally, Microsoft datacenters reuse 78 percent of our end-of-life assets and components; the remaining 22 percent of materials are recycled. Additionally, Microsoft is conducting research and development to improve waste diversion by determining new recycling solutions for used air filters and fiber optic cables.