Power plants in the PJM Interconnection balancing area
The PJM Interconnection balancing area takes in 2,049 power plants with 226.9 GW of nameplate capacity, the largest of the 40 areas covered here. Its plants sit in 15 states, with Pennsylvania holding 23% of the capacity. Natural gas makes up 47% of the mix, and the largest plant is John E Amos (2,933 MW). Since 2020, 27.8 GW has come online here, 53% of it solar.
- Natural gas106,248 MW47%
- Coal37,985 MW17%
- Nuclear35,447 MW16%
- Solar18,050 MW8.0%
- Wind11,732 MW5.2%
- Oil and petroleum5,963 MW2.6%
- Pumped-storage hydro5,046 MW2.2%
- Hydroelectric3,334 MW1.5%
- Biomass and waste2,039 MW0.9%
- Other sources557 MW0.2%
- Battery storage536 MW0.2%
Capacity by decade it came online
NuclearCoalNatural gasOil and petroleumHydroelectricPumped-storage hydroWindSolarBattery storageBiomass and wasteOther sources
Above the line: capacity operating in 2025. Below: capacity retired at plants that still run.
The 25 largest plants in the area
| Rank | Plant | State | Runs on | Capacity | First unit |
|---|---|---|---|---|---|
| 1 | John E Amos | West Virginia | Coal | 2,933 MW | 1971 |
| 2 | Peach Bottom | Pennsylvania | Nuclear | 2,876 MW | 1974 |
| 3 | Bath County | Virginia | Pumped-storage hydro | 2,862 MW | 1985 |
| 4 | Gavin Power, LLC | Ohio | Coal | 2,600 MW | 1974 |
| 5 | Rockport | Indiana | Coal | 2,600 MW | 1984 |
| 6 | TalenEnergy Susquehanna | Pennsylvania | Nuclear | 2,532 MW | 1983 |
| 7 | Braidwood Generation Station | Illinois | Nuclear | 2,450 MW | 1988 |
| 8 | Byron Generating Station | Illinois | Nuclear | 2,450 MW | 1985 |
| 9 | PSEG Salem Generating Station | New Jersey | Nuclear | 2,382 MW | 1971 |
| 10 | LaSalle Generating Station | Illinois | Nuclear | 2,340 MW | 1984 |
| 11 | Donald C Cook | Michigan | Nuclear | 2,285 MW | 1975 |
| 12 | Limerick | Pennsylvania | Nuclear | 2,277 MW | 1986 |
| 13 | Guernsey Power Station | Ohio | Natural gas | 2,055 MW | 2023 |
| 14 | FirstEnergy Harrison Power Station | West Virginia | Coal | 2,052 MW | 1972 |
| 15 | Dresden Generating Station | Illinois | Nuclear | 2,019 MW | 1970 |
| 16 | Quad Cities Generating Station | Illinois | Nuclear | 2,019 MW | 1972 |
| 17 | Conemaugh | Pennsylvania | Coal | 1,963 MW | 1970 |
| 18 | North Anna | Virginia | Nuclear | 1,960 MW | 1978 |
| 19 | Keystone | Pennsylvania | Coal | 1,883 MW | 1967 |
| 20 | Cardinal | Ohio | Coal | 1,880 MW | 1967 |
| 21 | Calvert Cliffs Nuclear Power Plant | Maryland | Nuclear | 1,850 MW | 1975 |
| 22 | Beaver Valley | Pennsylvania | Nuclear | 1,847 MW | 1976 |
| 23 | Chalk Point Power | Maryland | Natural gas | 1,825 MW | 1967 |
| 24 | Powerton | Illinois | Coal | 1,786 MW | 1972 |
| 25 | Greensville County Power Station | Virginia | Natural gas | 1,773 MW | 2018 |
States
| State | Plants | Capacity |
|---|---|---|
| Pennsylvania | 273 | 53.1 GW |
| Illinois | 329 | 35.1 GW |
| Ohio | 215 | 34.4 GW |
| Virginia | 257 | 31.3 GW |
| New Jersey | 410 | 16.5 GW |
| West Virginia | 42 | 16.1 GW |
| Maryland | 236 | 13.4 GW |
| Indiana | 57 | 9,835 MW |
| Kentucky | 29 | 6,112 MW |
| Michigan | 14 | 4,686 MW |
| North Carolina | 128 | 3,167 MW |
| Delaware | 38 | 3,020 MW |
Operators with the most capacity
| Operator | Plants | Capacity |
|---|---|---|
| Virginia Electric & Power Co | 36 | 20.2 GW |
| Constellation Nuclear | 9 | 19.3 GW |
| Appalachian Power Co | 16 | 6,863 MW |
| Indiana Michigan Power Co | 13 | 4,943 MW |
| Energy Harbor Nuclear Generation LLC | 3 | 4,084 MW |
| KeyCon Operating LLC | 2 | 3,846 MW |
| PSEG Nuclear LLC | 2 | 3,672 MW |
| Constellation Power, Inc | 11 | 3,517 MW |
| East Kentucky Power Coop, Inc | 10 | 3,495 MW |
| Invenergy Services LLC | 12 | 3,374 MW |