Nameplate capacity
4,210 MW
Rank in Arizona
#1
of 200 plants
In service since
1986
January 1986
Details
- Primary fuel
- Nuclear
- Technology
- Nuclear
- Operator
- Arizona Public Service Co
- County
- Maricopa County
- Generating units
- 3
- Share of state capacity
- 9.85%
- Rank among nuclear plants in Arizona
- #1 of 1
- EIA plant code
- 6008
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Nuclear | 1,403 MW | 1,311 MW | 1986 | Operating |
| 2 | Nuclear | 1,403 MW | 1,314 MW | 1986 | Operating |
| 3 | Nuclear | 1,403 MW | 1,312 MW | 1988 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Arizona
| Springerville | Coal | 1,779 MW |
| Santan | Natural gas | 1,326 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 4,210 MW solar plant and a 4,210 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Arizona power plants · What Arizona actually generates