Power Plants in ISO New England

1,477 plants · 41 GW total capacity

The ISO New England grid region encompasses 1,477 power plants with 41 GW total capacity across 7 states.

Largest is Millstone (2260 MW Nuclear); oldest active is Cabot Holyoke (1893); newest is Benz Solar 1 (2025); top state is Massachusetts (693 plants); top owner is AES Distributed Energy (50 plants).