˙American Electric Power
˙Consolidated ElectricCooperative
˙Dayton Power & Light
˙Direct Energy
˙Duke Energy
˙FirstEnergy (Cleveland Electric Illuminating Company, OhioEdison, Toledo Edison)
˙South Central PowerCompany
Oklahoma
˙Oklahoma Gas & Electric
˙Public Service Company of Oklahoma (part of American Electric Power)
Oregon
˙Ashland Electric
˙Avista Utilities
˙Canby Electric
˙Columbia River PublicUtility District
˙Emerald Public Utility District
˙IDACORP (Idaho Power)
˙Eugene Water & Electric Board
˙PacifiCorp (Pacific Power)
˙Portland General Electric
˙Salem Electric
˙Tillamook Public Utility District
˙Wasco Electric
˙West Oregon ElectricCooperative
˙Umatilla Electric Company Hermiston EnergyServices
Pennsylvania
˙Allegheny Power
˙Ambit Energy
˙Champion Energy
˙Citizens Electric ofLewisburg
˙Direct Energy
˙Duquesne Light
˙FirstEnergy (Penn Power, Met-Ed, Penelec)
˙PECO
˙PPL
˙Pike County Light& Power Company
˙Rural Valley Electric Co.
˙UGI Utilities, Inc.
˙Wellsboro ElectricCompany
Puerto Rico
˙Autoridad de Energía Electrica
˙EcoEléctrica
Rhode Island
˙Ambit Energy
˙National Grid (Narragansett Electric)
South Carolina
˙Berkeley ElectricCooperative
˙Central Electric PowerCooperative, Inc.
˙Duke Energy
˙Horry ElectricCooperative, Inc
˙Santee Cooper
˙South Carolina Electric & Gas Company
South Dakota
˙Black Hills Power
˙East River ElectricCooperative
˙Montana-Dakota Utilities
˙MidAmerican Energy
˙Northwestern Energy
˙Otter Tail Power Company
˙Rushmore ElectricCooperative
˙Xcel Energy
Tennessee
˙Kingsport Power(Appalachian Power)
˙Citizens Utilities Board
˙Electric Power Board
˙Jackson Energy Authority
˙Knoxville Utilities Board
˙Lenoir City UtilitiesBoard
˙Memphis Light, Gas and Water
˙Nashville Electric Service
˙Tennessee Valley Authority
Texas
