Power Plants in ISO New England

1,498 plants · 41.8 GW total capacity

The ISO New England grid region encompasses 1,498 power plants with 41.8 GW total capacity across 7 states.

Largest is Millstone (2260 MW Nuclear); oldest active is Cabot Holyoke (1893); newest is Woodstock Solar One (2026); top state is Massachusetts (700 plants); top owner is AES Distributed Energy (50 plants).