Power Plants in Pennsylvania

Pennsylvania's generating fleet held 53.3 gigawatts of nameplate capacity as of August 2026, ranking 4th among the 50 states and DC. This is capacity — what the equipment could produce running flat out — not generation, which varies widely depending on fuel type and operating patterns. Of 281 plants tracked, 278 were in service.

Natural gas dominates the fleet at 56.5% of capacity across 73 plants, followed by nuclear at 19.7% across 5 plants. Coal supplies 10% through 13 plants, while hydro contributes 4.6% from 19 plants. Wind, solar, and other sources together make up the remainder, with wind at 3.1% from 28 plants, solar at 2.3% from 81 plants, and other fuels at 3.8% from 58 plants. Battery storage accounts for 0.1% of capacity.

The largest plants are the nuclear stations Peach Bottom at 2,876 megawatts, TalenEnergy Susquehanna at 2,532 megawatts, and Limerick at 2,277 megawatts, followed by coal plants Conemaugh at 1,963 megawatts and Keystone at 1,883 megawatts. The oldest plant still listed came online in December 1905 at York Haven, while the newest, Potter Solar, entered service in July 2026, spanning over a century of fleet development.