Grid Overview

Arizona operates outside organized wholesale markets, with vertically-integrated utilities managing generation, transmission, and distribution. The state sits at the crossroads of the Western Interconnection, with significant power flows to California and Nevada.

Generation Mix (2024)

35%
28%
18%
12%
7%
Natural Gas (35%)
Nuclear (28%)
Solar (18%)
Coal (12%)
Other (7%)
☢️ Palo Verde Nuclear: The nation's largest power plant by net generation. Three units produce 3.9 GW, enough to power 4 million homes. Uniquely, it's the only nuclear plant in the world not located near a large body of water, using treated wastewater for cooling.

Data Center Market

Phoenix has emerged as a major data center market, driven by available power, land, favorable tax environment, and proximity to California, without California's regulatory overhead.

Key Markets

  • Phoenix Metro, Mesa, Goodyear, Chandler emerging as hyperscale corridors
  • Mesa, Major Meta/Facebook campus, Apple operations
  • Goodyear, Microsoft's massive expansion (multiple campuses)
  • Chandler, Intel fab + supporting infrastructure

Major Players

  • Microsoft, Goodyear mega-campus, billions invested
  • Meta, Mesa data center campus
  • Google, Mesa facility
  • Apple, Mesa global command center
  • CyrusOne, Phoenix campus
  • Stream Data Centers, Phoenix operations
⚠️ Opposition Alert: Tucson/Pima County has seen organized opposition to Amazon's "Project Blue" data center. See our tracker →

Water-Energy Nexus

Arizona's energy future is inseparable from its water challenges. As the Colorado River faces unprecedented stress, energy planners must balance:

  • Cooling demands, Data centers and power plants compete for water
  • Hydropower decline, Glen Canyon Dam generation dropping with Lake Powell levels
  • Groundwater pumping, Energy-intensive to extract; legal limits in many areas
  • Agricultural trade-offs, Water for energy vs. food production

The good news: solar requires minimal water (except for cleaning), making Arizona's abundant sunshine a strategic advantage as water becomes scarcer.

Key Facilities

  • Palo Verde Nuclear, 3.9 GW, nation's largest nuclear plant
  • Navajo Generating Station, Retired 2019 (was 2.25 GW coal)
  • Four Corners, 1.5 GW coal, retirement timeline TBD
  • Sundance Solar, 250 MW, one of state's largest solar farms
  • Red Rock Solar, 250 MW, utility-scale solar

Issues to Watch

  • Data Center Water Use, Growing scrutiny of evaporative cooling demands
  • Clean Energy Standard, APS committed to 100% clean by 2050, no state mandate
  • Coal Retirements, Four Corners and Cholla plant futures uncertain
  • Grid Reliability, Summer peak demands straining system during heatwaves
  • Transmission Constraints, Limited export capacity to California during surplus solar
  • Battery Storage Growth, Rapidly deploying to capture solar overgeneration