Skip Ribbon Commands
Skip to main content
Sign In
Home > Stay Informed > RegionalCollaboration


The Western Energy Imbalance Market (EIM)

The EIM is a real-time energy-only market offered by the ISO to any balancing authority area in the western United States. It provides a low-cost, low-risk option that balances load and resources automatically and economically.


Exploring a regional independent system operator

A regional ISO would consolidate balancing authority areas to create an integrated transmission planning process and optimization of energy and ancillary services in the day-ahead and in real-time.