Google · Mesa, Arizona

Google Mesa

237MW

The power of 190,000 US homes.

Drawing power since Jul 2025.

Capital cost
$6.9B
Chips
TPU v6e, TPU v5p
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Power over time

facility power · 5 milestones
Every milestone
  1. 1 Jul 2023 — Land clearing begins for the entire site.
  2. 1 Jul 2025 126 MW Building 1 is operational. This is based on the state of construction on 2025-03-02 as seen on Google Earth, where building shell and external components seems to have been completed, but there is still a lot of construction equipment present. That equipment appears to have been cleared up by this date, 4 months later, with the 2025-09-07 satellite imagery providing an upper bound. Construction has begun on the Building 2 roof, with work beginning on the areas for cooling and generators as well.
  3. 7 Sep 2025 126 MW Building 2 roof is mostly completed. Building 2's backup generators are almost complete, and cooling is a little more than halfway complete. The Building 2 substation is also under construction.
  4. 15 May 2026 126 MW Building 2 is close to being operational. There is only construction left on the backup generators, which are almost complete. Some equipment is also strewn around the building, especially near the air-cooled chillers. Preparation seems to have begun for Building 3 at the site.
  5. 15 Aug 2026 237 MW Building 2 is operational. This is estimated based on the close-to-complete construction status from May 2026.

Nuclear and gas lead the three grids that serve Maricopa County

net generation by fuel · Oct 2025 to Sep 2026

Salt River Project SRP · balancing authority

  1. Gas 33%
  2. Coal 8%
  3. Nuclear 51%
  4. Wind 1%
  5. Solar 7%
  6. Hydro <1%
  7. Other 0%

Arizona Public Service Company AZPS · balancing authority

  1. Gas 39%
  2. Coal 26%
  3. Nuclear 0%
  4. Wind 10%
  5. Solar 24%
  6. Hydro 0%
  7. Other 1%

Western Area Power Administration - Desert Southwest Region WALC · balancing authority

  1. Gas 48%
  2. Coal 0%
  3. Nuclear 0%
  4. Wind 9%
  5. Solar 6%
  6. Hydro 37%
  7. Other 0%

The utilities that serve Maricopa County, AZ, report to 3 grids; the data does not show which one feeds the site. Each grid is a balancing authority. Generation only; imports are excluded. Every grid behind an AI site.

Owners plan 3.6 GW of new power in Maricopa County, mostly storage

power plants in Maricopa County · EIA-860M, September 2026
  1. Saddleback Generation Station Gas · 1.3 GW · Dec 2030 · proposed · Copia Power
  2. Desert Sand BESS Solar · 600 MW · Dec 2028 · proposed · DESA bn, LLC
  3. Maricopa Solar Storage · 550 MW · Dec 2026 · being built · Maricopa Solar
  4. Red Hawk Gas · 392 MW · Oct 2027 · being built · Arizona Public Service Co
  5. Romero Energy Center Storage · 225 MW · Jun 2027 · being built · Romero Energy Center, LLC

In service in Maricopa County today: 24.0 GW. Since January 2023: 6.4 GW added, 0 MW retired. Owners plan to retire 3 MW more. 4 more planned plants are listed on the county’s row. A plant in the same county does not mean it feeds the site. Power plants near every AI site.

Sources

selected by Epoch AI
  1. DCD article on the site breaking ground
  2. DCD article on announcement to build Building 2

Data: Epoch AI, “AI data centers”, CC BY 4.0, retrieved 22 Oct 2026. Facility power adds cooling and other overhead to the IT power the servers draw. Placed at the centre of Mesa. Grid: U.S. Energy Information Administration, Hourly Electric Grid Monitor (Form EIA-930), public domain, retrieved 16 Oct 2026; utilities by county from Form EIA-861 and the U.S. Census Bureau Geocoder, public domain. Power plants: U.S. Energy Information Administration, Form EIA-860M, public domain, inventory as of September 2026. All sources.