Participating organizations in the Eastern Utilities Group
- Alliant Energy Corporation
- Ameren UE
- American Electric Power
- Baltimore Gas and Electric
- BC Hydro
- Commonwealth Edison
- Connecticut Light and Power
- DTE Energy
- Duquesne Light Co
- Entergy
- FirstEnergy
- National Grid
- Nisource
- Northeast Utilities
- New York State Electric and Gas
- PECO
- Progress Energy
- Tampa Electric
- Tennessee Valley Authority
- Vectren Corporation
- WE Energies
- Western MA
- Western Resources
- Wisconsin Public Service Corp
- Yankee Gas Services