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Power Plants in Arizona
All 205 operable plants · EIA inventory, August 2026.
Total capacity
45 GW
6th largest of the 50 states and DC
Plants
205
201 in service
Largest plant
4,210 MW
Palo Verde
Capacity by fuel
40%
25%
| Fuel | Capacity | Share | Plants |
|---|---|---|---|
| Natural gas | 18,066 MW | 40.2% | 33 |
| Solar | 11,154 MW | 24.8% | 119 |
| Battery storage | 4,260 MW | 9.5% | 26 |
| Nuclear | 4,210 MW | 9.4% | 1 |
| Hydro | 2,914 MW | 6.5% | 11 |
| Coal | 2,601 MW | 5.8% | 2 |
| Wind | 1,705 MW | 3.8% | 9 |
| Other | 60 MW | 0.1% | 4 |
Nameplate capacity — what the fleet could produce running flat out — not what it actually generated. A plant is filed under the fuel carrying most of its capacity. See what Arizona actually generated →
Largest plants in Arizona
| # | Plant | Fuel | Capacity | Online |
|---|---|---|---|---|
| 1 | Palo VerdeMaricopa County | Nuclear | 4,210 MW | 1986 |
| 2 | SpringervilleApache County | Coal | 1,779 MW | 1985 |
| 3 | SantanMaricopa County | Natural gas | 1,326 MW | 1974 |
| 4 | Glen Canyon DamCoconino County | Hydro | 1,312 MW | 1964 |
| 5 | Harquahala Generating ProjectMaricopa County | Natural gas | 1,277 MW | 2004 |
| 6 | West PhoenixMaricopa County | Natural gas | 1,207 MW | 1972 |
| 7 | Red HawkMaricopa County | Natural gas | 1,127 MW | 2002 |
| 8 | Hoover Dam (AZ)Mohave County | Hydro | 1,039 MW | 1936 |
| 9 | Coolidge Generation StationPinal County | Natural gas | 1,023 MW | 2011 |
| 10 | CoronadoApache County | Coal | 822 MW | 1979 |
Arizona's generating fleet in context
Arizona's generating fleet holds 44,969 megawatts of nameplate capacity, ranking sixth among the 50 states and DC. This is capacity—what the equipment could produce running flat out—not generation, which depends on how often plants actually run. The state operates 201 plants in service out of 205 tracked.
Natural gas dominates the fleet at 40.2%, followed by solar at 24.8%. Battery storage accounts for 9.5%, nuclear for 9.4%, hydro for 6.5%, coal for 5.8%, and wind for 3.8%. The largest plant is Palo Verde, a nuclear facility with 4,210 megawatts. Springerville, a coal plant with 1,779 megawatts, is second. The Santan natural gas plant holds 1,326 megawatts; Glen Canyon Dam, a hydro installation, provides 1,312 megawatts; and the Harquahala Generating Project, a natural gas facility, contributes 1,277 megawatts.
Arizona's fleet spans a century of equipment. The oldest plant still listed, Mormon Flat, came online in May 1926. The newest, Maricopa Solar, entered service in July 2026.
Written from the EIA figures on this page, covering data through August 2026.
Every plant in Arizona, by fuel
Natural gas33 plants · 18,066 MW
All US natural gas plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Santan | Maricopa | 1,326 MW | 9 | 1974 |
| Harquahala Generating Project | Maricopa | 1,277 MW | 6 | 2004 |
| West Phoenix | Maricopa | 1,207 MW | 10 | 1972 |
| Red Hawk | Maricopa | 1,127 MW | 6 | 2002 |
| Coolidge Generation Station | Pinal | 1,023 MW | 18 | 2011 |
| Ocotillo | Maricopa | 806 MW | 7 | 1972 |
| Apache Station | Cochise | 782 MW | 9 | 1963 |
| Desert Basin | Pinal | 745 MW | 5 | 2001 |
| Agua Fria | Maricopa | 738 MW | 10 | 1957 |
| Arlington Valley Energy Facility | Maricopa | 713 MW | 3 | 2002 |
| South Point Energy Center | Mohave | 708 MW | 3 | 2001 |
| Sundance | Pinal | 695 MW | 12 | 2002 |
| Mesquite Generating Station Block 1 | Maricopa | 692 MW | 3 | 2003 |
| Mesquite Generating Station Block 2 | Maricopa | 692 MW | 3 | 2003 |
| Griffith Energy LLC | Mohave | 655 MW | 3 | 2002 |
| Gila River Power Block 1 | Maricopa | 619 MW | 3 | 2003 |
| Gila River Power Block 2 | Maricopa | 619 MW | 3 | 2003 |
| Gila River Power Block 3 | Maricopa | 619 MW | 3 | 2003 |
| Gila River Power Block 4 | Maricopa | 619 MW | 3 | 2003 |
| Kyrene | Maricopa | 596 MW | 7 | 1952 |
| H Wilson Sundt Generating Station | Pima | 529 MW | 14 | 1962 |
| Yucca | Yuma | 422 MW | 8 | 1959 |
| Saguaro | Pinal | 185 MW | 3 | 1972 |
| Copper Crossing Energy and Research Cent | Pinal | 153 MW | 5 | 2024 |
| Black Mountain Generating Station | Mohave | 121 MW | 2 | 2008 |
| Valencia | Santa Cruz | 108 MW | 4 | 1989 |
| North Loop | Pima | 108 MW | 4 | 1972 |
| Demoss Petrie | Pima | 85 MW | 1 | 2001 |
| Yuma Cogeneration Associates | Yuma | 63 MW | 2 | 1994 |
| Arizona State University CHP | Maricopa | 17 MW | 2 | 2006 |
| Cogeneration 1 | Pima | 9.0 MW | 1 | 2002 |
| Cogeneration 2 | Pima | 5.5 MW | 1 | 2002 |
| University of Arizona - Biosphere 2 | Pinal | 3.1 MW | 2 | 1990 |
Solar119 plants · 11,154 MW
All US solar plants →Battery storage26 plants · 4,260 MW
All US battery storage plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Catclaw Solar | Maricopa | 450 MW | 2 | 2026 |
| Serrano | Pima | 384 MW | 2 | 2025 |
| Atlas VII | La Paz | 300 MW | 2 | 2025 |
| Papago Energy Storage | Maricopa | 300 MW | 1 | 2025 |
| Beehive Energy Storage | Maricopa | 250 MW | 1 | 2026 |
| Pediment BESS I | Maricopa | 250 MW | 1 | 2026 |
| Sierra Estrella Energy Storage | Maricopa | 250 MW | 1 | 2024 |
| Flatland Storage | Pinal | 200 MW | 1 | 2025 |
| Roadrunner Reserve Phase 1 | Pima | 200 MW | 1 | 2025 |
| Roadrunner Reserve Phase 2 | Pima | 200 MW | 1 | 2026 |
| Westwing | Maricopa | 200 MW | 2 | 2024 |
| McFarland C | Yuma | 185 MW | 1 | 2025 |
| Scatter Wash 1 | Maricopa | 170 MW | 1 | 2025 |
| Atlas IX | La Paz | 150 MW | 1 | 2025 |
| Justice Energy Storage | Maricopa | 150 MW | 1 | 2026 |
| Sierra Pinta BESS | Yuma | 113 MW | 1 | 2025 |
| Saint Energy Storage II LLC | Pinal | 100 MW | 1 | 2023 |
| Superstition Energy Storage | Maricopa | 90 MW | 1 | 2024 |
| Scatter Wash 2 | Maricopa | 85 MW | 1 | 2025 |
| Pluto Energy Storage | Maricopa | 75 MW | 1 | 2025 |
| El Sol BESS | Maricopa | 50 MW | 1 | 2023 |
| Kingman Energy Storage | Mohave | 50 MW | 1 | 2025 |
| Mohave Electric Cooperative at Joy Lane | Mohave | 26 MW | 2 | 2016 |
| Iron Horse Battery Storage Hybrid | Pima | 12 MW | 2 | 2017 |
| AES ES GILBERT | Maricopa | 10 MW | 1 | 2019 |
| Pima Energy Storage System | Pima | 10 MW | 1 | 2017 |
Nuclear1 plant · 4,210 MW
All US nuclear plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Palo Verde | Maricopa | 4,210 MW | 3 | 1986 |
Hydro11 plants · 2,914 MW
All US hydro plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Glen Canyon Dam | Coconino | 1,312 MW | 8 | 1964 |
| Hoover Dam (AZ) | Mohave | 1,039 MW | 10 | 1936 |
| Davis Dam | Mohave | 255 MW | 5 | 1951 |
| Horse Mesa | Maricopa | 131 MW | 4 | 1927 |
| Mormon Flat | Maricopa | 64 MW | 2 | 1926 |
| Waddell | Maricopa | 40 MW | 4 | 1993 |
| Roosevelt | Maricopa | 36 MW | 1 | 1973 |
| Headgate Rock | La Paz | 20 MW | 3 | 1993 |
| Stewart Mountain | Maricopa | 13 MW | 1 | 1930 |
| Crosscut | Maricopa | 3.0 MW | 1 | 1939 |
| South Consolidated | Maricopa | 1.4 MW | 1 | 1981 |
Coal2 plants · 2,601 MW
All US coal plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Springerville | Apache | 1,779 MW | 7 | 1985 |
| Coronado | Apache | 822 MW | 2 | 1979 |
Wind9 plants · 1,705 MW
All US wind plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| West Camp Wind Farm | Navajo | 500 MW | 1 | 2026 |
| Mohave County Wind Farm | Mohave | 350 MW | 1 | 2020 |
| Chevelon Butte Wind Farm | Coconino | 238 MW | 1 | 2023 |
| Chevelon Butte Phase 2 | Coconino | 216 MW | 1 | 2024 |
| Babbitt Ranch Energy Center | Coconino | 163 MW | 1 | 2024 |
| Perrin Ranch Wind LLC | Coconino | 99 MW | 1 | 2012 |
| Poseidon Wind, LLC | Navajo | 65 MW | 1 | 2010 |
| Dry Lake Wind LLC | Navajo | 63 MW | 1 | 2009 |
| Kingman 1 | Mohave | 11 MW | 2 | 2011 |
Other4 plants · 60 MW
All US other plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Novo BioPower Plant | Navajo | 27 MW | 1 | 2008 |
| Douglas | Cochise | 26 MW | 1 | 1972 |
| Northwest Regional | Maricopa | 3.2 MW | 2 | 2012 |
| Western Renewable Energy | Apache | 3.0 MW | 1 | 2004 |
Sorted by nameplate capacity within each fuel. “Online” is the year the plant’s earliest surviving unit entered service.
Frequently asked questions
›How many power plants are there in Arizona?
Arizona has 205 operable power plants with a combined nameplate capacity of 45 GW, the 6th largest generating fleet of the 50 states and DC. 201 of them are currently in service.
›What is the largest power plant in Arizona?
Palo Verde in Maricopa County, a nuclear plant with 4,210 MW of capacity across 3 generating units, first online in January 1986.
›What fuel do Arizona's power plants use?
Natural gas accounts for the largest share of Arizona's generating capacity — 18,066 MW, or 40.2% of the total, across 33 plants. Solar follows at 24.8%, Battery storage follows at 9.5%, Nuclear follows at 9.4%. Note this is capacity, not generation — what the fleet could produce, not what it did.
›What is the oldest power plant in Arizona?
Mormon Flat is the oldest still operable, with its earliest unit entering service in May 1926. The most recent addition is Maricopa Solar, online since July 2026.