Power Plants in Pennsylvania

Pennsylvania's power sector in numbers

Bywatts maps 170 operating power plants with 39.2 GW of nameplate capacity in Pennsylvania. Natural Gas leads with 27% of that capacity across 28 plants, followed by Coal (27%) and Nuclear (26%). The inventory also includes 45 plants (9.2 GW) that EIA-860 lists as retired, 4 partly retired with no operable units of their recorded fuel and 6 never built; the largest retired plant is FIRSTENERGY BRUCE MANSFIELD (2,741 MW, retired 2019).

The largest operating plants are PPL SUSQUEHANNA (2,596 MW, Nuclear, PPL SUSQUEHANNA LLC), PEACH BOTTOM (2,319 MW, Nuclear, EXELON NUCLEAR) and LIMERICK (2,277 MW, Nuclear, EXELON NUCLEAR).

Of the 168 operating plants with a recorded commissioning year, 85 came online in 2000 or later and 39 in 2010 or later; the busiest decade for new capacity was the 1970s (12.5 GW).

The largest operators by operating capacity are EXELON NUCLEAR (3 plants, 5.6 GW), GENON NORTHEAST MANAGEMENT COMPANY (2 plants, 3.8 GW) and EXELON POWER (11 plants, 3.0 GW).

Retail electricity sales in Pennsylvania reached 143.3 TWh in 2025, down 2.1% over ten years and up 0.8% year on year; residential customers took 39.1% of it. The average retail price across all sectors was 14.11 cents per kWh, up 36.8% since 2015.

The database also maps 398 named substations (18 of the 100 with a recorded voltage are rated 345 kV or above), 5 data centers (operators include Citynet, Crown Castle and Equinix), 218 solar installers and 83 solar companies in Pennsylvania.

Operating capacity by fuel

Retail electricity sales

Sources: HIFLD power-plant inventory (capacity, fuel, operator), EIA-860 (commissioning year, retirements, operable capacity), EIA retail sales and revenue series through January 2026. Counts are of plants Bywatts lists, not every generator in the state.