Directory of Power Plants in Arizona
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Hoover Dam (AZ) | U S Bureau of Reclamation | Boulder City, AZ | Western Area Power Administration - Desert Southwest Region (WALC) | 898.4 GWh | Aug 1936 | Sep 2025 | Water |
| H Wilson Sundt Generating Station | Tucson Electric Power Co | Tucson, AZ | Tucson Electric Power (TEPC) | 1.8 TWh | Nov 1958 | Sep 2025 | Natural Gas |
| Horse Mesa | Salt River Project | Apache Junction, AZ | Salt River Project Agricultural Improvement and Power District (SRP) | 96.4 GWh | Mar 1927 | Sep 2025 | Water |
| Harquahala Generating Project | New Harquahala Generating Co, LLC | Tonopah, AZ | New Harquahala Generating Company, LLC (HGMA) | 3.5 TWh | May 2004 | Sep 2025 | Natural Gas |
| Harquahala Sun Solar Project | Copia Power | Tonopah, AZ | Arizona Public Service Company (AZPS) | 228.0 GWh | - | Sep 2025 | Solar |
| Harquahala 2 | Copia Power | Tonopah, AZ | Arizona Public Service Company (AZPS) | 494.8 GWh | - | Sep 2025 | Solar |
| Headgate Rock | Colorado River Indian Irr Proj | Parker, AZ | Western Area Power Administration - Desert Southwest Region (WALC) | 35.7 GWh | Feb 1993 | Dec 2024 | Water |
| Hyder Solar Hybrid | Arizona Public Service Co | Hyder, AZ | Arizona Public Service Company (AZPS) | 35.3 GWh | Oct 2011 | Dec 2024 | Solar |
| Hyder II Hybrid | Arizona Public Service Co | Hyder, AZ | Arizona Public Service Company (AZPS) | 32.5 GWh | Nov 2013 | Dec 2024 | Solar |
Browse Power Plants By Arizona Counties
Figures are based on September 2025 generation numbers.| County | State Rank | Active Plants | Sep 2025 Generation |
|---|---|---|---|
| Santa Cruz County, AZ | # 13 | 2 | 4.8 GWh |
| Gila County, AZ | # 12 | 2 | 50.2 GWh |
| Yavapai County, AZ | # 11 | 7 | 97.8 GWh |
| La Paz County, AZ | # 10 | 13 | 118.9 GWh |
| Navajo County, AZ | # 9 | 8 | 1.8 TWh |
| Yuma County, AZ | # 8 | 17 | 2.5 TWh |
| Cochise County, AZ | # 7 | 11 | 2.8 TWh |
| County | State Rank | Active Plants | Sep 2025 Generation |
|---|---|---|---|
| Pima County, AZ | # 6 | 39 | 2.8 TWh |
| Coconino County, AZ | # 5 | 12 | 4.7 TWh |
| Pinal County, AZ | # 4 | 26 | 5.8 TWh |
| Apache County, AZ | # 3 | 4 | 7.8 TWh |
| Mohave County, AZ | # 2 | 16 | 9.0 TWh |
| Maricopa County, AZ | # 1 | 88 | 81.0 TWh |