Arizona Public Service Co.

Avista Utilities

Black Hills Power

ComEd

Consumers Energy

Edison Sault Electric

El Paso Electric

Alliant / IP&L

Green Mountain Power

Idaho Power

IMP

Montana-Dakota Utilities

Nevada Power

NorthWestern Energy

NorthWestern Energy

Otter Tail Power

PG&E

Penelec

Portland General Electric

Puget Sound Energy

RG&E

Sierra Paci�c Power

Southern California Edison

Detroit Edison

Upper Peninsula Power

AEP Texas

Alabama Power

Cap Rock Energy

Cheyenne Light, Fuel & Power

CenterPoint

Duke Energy

Mt. Carmel Public Utility Co.

Entergy New Orleans

Entergy Texas

Florida Power & Light

Tampa Electric

Georgia Power

Mississippi Power

Progress Energy Carolinas

Progress Energy Florida

Texas-New Mexico Power

Texas-New Mexico Power

Tucson Electric Power

UniSource

Central Maine Power CVPS

Duke Energy

DP&L

Entergy Louisiana

Entergy Mississippi

Gulf Power

National Grid

NYSEG

OG&E

PSO

Minnesota Power

PennPower

PNM

Xcel Energy

Xcel Energy

Superior Water, Light & Power

WPS

Ameren CILCO

Ameren CIPS

Aquila

CHG&E

Delmarva Power

Allegheny Power

Empire District Electric

Entergy Arkansas

Kansas City Power & Light

MGE

NIPSCO Ohio Edison PPL

UGI

CEI

PSC of New Hampshire

SWEPCOOncor

Xcel Energy

Alliant/ WPL

TOLED

Westar Energy

AmerenUE

Appalachian Power

Dominion

IPL

Kentucky Power Kentucky

Utilities

LG&E

AEP Ohio

Vectren

AmerenIP

UIUI

Aquila

Cleco

We Energies

Western Massachusetts Electric

Connecticut Light and Power Co.NSTAR

Pike County Light & Power Co. Orange and Rockland

Rockland Electric Co.

Metropolitan Edison Co.

Public Service Electric and Gas Co.

Jersey Central Power & Light

Atlantic City Electric

Baltimore Gas and Electric Co.

ConEd

PEPCO

PECO Energy

Alaska Hawaii

Hawaiian Electric Co.

Maui Electric Co.

Hawaii Electric Light Co. Alaska Electric Light and Power Co.

EEI U.S. Member Company Service Territories JUNE 2008

Produced by Edison Electric Institute’s Project Support Group. Data Source: Ventyx,Inc., The Velocity Suite 2008.

OG&E = OG&E Electric Services

PG&E = Paci�c Gas & Electric Company

PPL = PPL Electric Utilities Corporation

PSC of NH = Public Service Company of New Hampshire

PSO = Public Service Company of Oklahoma

RG&E = Rochester Gas and Electric Corporation

TOLED = Toledo Edison Company , The

UI = United Illuminating Company, The

UGI = UGI Utilities, Inc.

SWEPCO = Southwestern Electric Power Company

Penelec = Pennsylvania Electric Company

Penn Power = Pennsylvania Power Company

WPS = Wisconsin Public Service Corporation

NIPSCO = Northern Indiana Public Service Co.

CHG&E = Central Hudson Gas & Electric Corporation

CVPS = Central Vermont Public Service Corporation

ConEd = Consolidated Edison Company of New York, Inc

ComEd = Commonwealth Edison Company

IPL = Indianapolis Power & Light Company

Alliant/IP&L = Interstate Power and Light Company

AEP = American Electric Power, Inc.

IMP = Indiana Michigan Power

LG&E = Louisville Gas and Electric Company

MGE = Madison Gas and Electric Company

NYSEG = New York State Electric & Gas Corporation

DP&L = Dayton Power and Light Company, The

CEI = Cleveland Electric Illuminating Company, The

Alliant/WPL = Wisconsin Power and Light Company

Map Abbreviation Key

EEI Member Lookup By Parent Company

EEI Member Lookup By Operating UtilityAEP Ohio .......................................................................American Electric Power, Inc.AEP Texas .....................................................................American Electric Power, Inc.Alabama Power Company .............................................Southern CompanyAlaska Electric Light and Power Company .....................No ParentAllegheny Power .............................................................Allegheny Energy, Inc.AmerenCILCO ...............................................................Ameren CorporationAmerenCIPS ..................................................................Ameren CorporationAmerenIP .......................................................................Ameren CorporationAmerenUE .....................................................................Ameren CorporationAppalachian Power ........................................................American Electric Power, Inc.Aquila, Inc. ......................................................................No Parent Arizona Public Service Company ..................................Pinnacle West Capital CorporationAtlantic City Electric .......................................................Pepco Holdings, Inc.Avista Utilities .................................................................Avista CorporationBaltimore Gas and Electric Company .............................Constellation Energy Group, Inc.Black Hills Power ............................................................Black Hills CorporationCap Rock Energy Corporation ........................................No ParentCenterPoint Energy, Inc. .................................................No ParentCentral Hudson Gas & Electric Corporation ...................CH Energy Group, Inc.Central Maine Power Company ......................................Energy East CorporationCentral Vermont Public Service Corporation ..................No ParentCheyenne Light, Fuel & Power Company ......................Black Hills CorporationCleco Power LLC ............................................................Cleco CorporationCommonwealth Edison Company ..................................Exelon CorporationConsolidated Edison Company of New York, Inc. ........................................................Consolidated Edison, Inc.Consumers Energy .........................................................CMS Energy CorporationDelmarva Power ............................................................Pepco Holdings, Inc.Dominion ........................................................................No Parent

Duke Energy Corporation ...............................................No ParentEdison Sault Electric Company .....................................Wisconsin Energy CorporationEl Paso Electric Company ..............................................No ParentEmpire District Electric Company, The ...........................No ParentEntergy Arkansas, Inc. ...................................................Entergy CorporationEntergy Louisiana, Inc. ..................................................Entergy CorporationEntergy Mississippi, Inc. ................................................Entergy CorporationEntergy New Orleans, Inc. ..............................................Entergy CorporationEntergy Texas, Inc. .........................................................Entergy CorporationFlorida Power & Light Company .....................................FPL Group, Inc.Georgia Power Company ..............................................Southern CompanyGreen Mountain Power Corporation ...............................No ParentGulf Power Company ....................................................Southern CompanyHawaii Electric Light Company, Inc. ..............................Hawaiian Electric Industries, Inc.Hawaiian Electric Company, Inc. ...................................Hawaiian Electric Industries, Inc.Idaho Power Company ..................................................IDACORP, Inc.Indiana Michigan Power ................................................American Electric Power, Inc.Indianapolis Power & Light Company .............................AES CorporationInterstate Power and Light Company .............................Alliant Energy CorporationJersey Central Power & Light Company ........................FirstEnergy Corp.Kansas City Power & Light Company .............................Great Plains Energy, Inc.Kentucky Power .............................................................American Electric Power, Inc.Kentucky Utilities Company ............................................E.ON U.S.Louisville Gas and Electric Company ............................E.ON U.S.Madison Gas and Electric Company ..............................MGE Energy, Inc.Maui Electric Company, Ltd. ..........................................Hawaiian Electric Industries, Inc.Metropolitan Edison Company ......................................FirstEnergy Corp.Minnesota Power ...........................................................ALLETEMississippi Power Company ..........................................Southern Company

Montana-Dakota Utilities Co. ..........................................MDU Resources Group, Inc.Mt. Carmel Public Utility Company .................................No ParentNational Grid ..................................................................No ParentNevada Power Company ...............................................Sierra Pacific ResourcesNew York State Electric & Gas Corporation ..................Energy East CorporationNorthern Indiana Public Service Co (NIPSCO) ..............NiSource Inc.NorthWestern Energy .....................................................No ParentNSTAR ............................................................................No ParentOG&E Electric Services .................................................OGE Energy CorporationOhio Edison Company ...................................................FirstEnergy Corp.Oncor .............................................................................Energy Future HoldingsOrange and Rockland Utilities, Inc. ................................Consolidated Edison, Inc.Otter Tail Power Company .............................................Otter Tail CorporationPacific Gas & Electric Company ....................................PG&E CorporationPECO Energy .................................................................Exelon CorporationPennsylvania Electric Company ....................................FirstEnergy Corp.Pennsylvania Power Company .......................................FirstEnergy Corp.Pepco ............................................................................Pepco Holdings, Inc.Pike County Light & Power Company ...........................Consolidated Edison, Inc.PNM ...............................................................................PNM Resources, Inc.Portland General Electric ................................................No ParentPPL Electric Utilities Corporation ...................................PPL CorporationProgress Energy Carolinas, Inc. ....................................Progress Energy, Inc.Progress Energy Florida, Inc. .........................................Progress Energy, Inc.Public Service Company of New Hampshire .................Northeast UtilitiesPublic Service Company of Oklahoma ..........................American Electric Power, Inc.Public Service Electric and Gas Company ....................Public Service Enterprise Group, Inc.Puget Sound Energy .....................................................Puget Energy, Inc.Rochester Gas and Electric Corporation ........................Energy East Corporation

Rockland Electric Company ..........................................Consolidated Edison, Inc.Sierra Pacific Power Company ......................................Sierra Pacific ResourcesSouthern California Edison Company ............................Edison International Southwestern Electric Power Company ......................... American Electric Power, Inc.Superior Water, Light and Power Company ...................ALLETETampa Electric Company ...............................................TECO Energy, Inc.Texas-New Mexico Power Company .............................PNM Resources, Inc.The Cleveland Electric Illuminating Company ...............FirstEnergy Corp.The Connecticut Light and Power Company .................Northeast UtilitiesThe Dayton Power and Light Company ..........................DPL Inc.The Detroit Edison Company .........................................DTE Energy CompanyThe Toledo Edison Company ........................................FirstEnergy Corp.The United Illuminating Company .................................UIL Holdings CorporationTucson Electric Power Company ...................................UniSource Energy CorporationUGI Utilities, Inc. ............................................................UGI CorporationUniSource Energy Services ............................................UniSource Energy CorporationUpper Peninsula Power Company .................................Integrys Energy GroupVectren Energy Delivery-South .....................................Vectren CorporationWe Energies ..................................................................Wisconsin Energy CorporationWestar Energy Inc. .........................................................No ParentWestern Massachusetts Electric Company ...................Northeast UtilitiesWisconsin Power and Light Company ...........................Alliant Energy CorporationWisconsin Public Service Corporation ............................Integrys Energy Group

AES CorporationIndianapolis Power & Light Company

Alaska Electric Light and Power Company

Allegheny Energy, Inc.Allegheny Power

ALLETEMinnesota PowerSuperior Water, Light and Power Company

Alliant Energy CorporationInterstate Power and Light CompanyWisconsin Power and Light Company

Ameren CorporationAmerenCILCOAmerenCIPSAmerenIPAmerenUE

American Electric Power, Inc.AEP OhioAEP TexasAppalachian PowerIndiana Michigan PowerKentucky PowerPublic Service Company of OklahomaSouthwestern Electric Power Company

Aquila, Inc.

Avista CorporationAvista Utilities

Black Hills CorporationBlack Hills PowerCheyenne Light, Fuel & Power Company

Cap Rock Energy Corporation

CenterPoint Energy, Inc.

Central Vermont Public Service Corporation

CH Energy Group, Inc.Central Hudson Gas & Electric Corporation

Cleco CorporationCleco Power LLC

CMS Energy CorporationConsumers Energy

Consolidated Edison, Inc.Consolidated Edison Company of New York, Inc.Orange and Rockland Utilities, Inc. Pike County Light & Power Company Rockland Electric Company

Constellation Energy Group, Inc.Baltimore Gas and Electric Company

Dominion

DPL Inc.The Dayton Power and Light Company

DTE Energy CompanyThe Detroit Edison Company

Duke Energy Corporation

Edison International Southern California Edison Company

El Paso Electric Company

Empire District Electric Company, The

Energy East CorporationCentral Maine Power CompanyNew York State Electric & Gas CorporationRochester Gas and Electric Corporation

Energy Future Holdings Oncor

Entergy CorporationEntergy Arkansas, Inc.Entergy Louisiana, Inc.Entergy Mississippi, Inc.Entergy New Orleans, Inc.Entergy Texas, Inc.

E.ON U.S.Kentucky Utilities CompanyLouisville Gas and Electric Company

Exelon CorporationCommonwealth Edison CompanyPECO Energy

FirstEnergy Corp.Jersey Central Power & Light CompanyThe Cleveland Electric Illuminating CompanyOhio Edison CompanyThe Toledo Edison CompanyMetropolitan Edison CompanyPennsylvania Electric CompanyPennsylvania Power Company

FPL Group, Inc.Florida Power & Light Company

Great Plains Energy, Inc.Kansas City Power & Light Company

Green Mountain Power Corporation

Hawaiian Electric Industries, Inc.Hawaiian Electric Company, Inc. Hawaii Electric Light Company, Inc. Maui Electric Company, Ltd.

IDACORP, Inc.Idaho Power Company

Integrys Energy GroupUpper Peninsula Power CompanyWisconsin Public Service Corporation

MDU Resources Group, Inc.Montana-Dakota Utilities Co.

MGE Energy, Inc.Madison Gas and Electric Company

Mt. Carmel Public Utility Company

National Grid

NiSource Inc.Northern Indiana Public Service Co (NIPSCO)

Northeast UtilitiesThe Connecticut Light and Power CompanyPublic Service Company of New HampshireWestern Massachusetts Electric Company

NorthWestern Energy

NSTAR

OGE Energy CorporationOG&E Electric Services

Otter Tail CorporationOtter Tail Power Company

Pepco Holdings, Inc.Atlantic City ElectricDelmarva PowerPepco

PG&E CorporationPacific Gas & Electric Company

Pinnacle West Capital CorporationArizona Public Service Company

PNM Resources, Inc.PNM Texas-New Mexico Power Company

Portland General Electric

PPL CorporationPPL Electric Utilities Corporation

Progress Energy, Inc.Progress Energy Carolinas, Inc.Progress Energy Florida, Inc.

Public Service Enterprise Group, Inc.Public Service Electric and Gas Company

Puget Energy, Inc.Puget Sound Energy

Sierra Pacific ResourcesNevada Power CompanySierra Pacific Power Company

Southern CompanyAlabama Power CompanyGeorgia Power CompanyGulf Power CompanyMississippi Power Company

TECO Energy, Inc.Tampa Electric Company

UGI CorporationUGI Utilities, Inc.

UIL Holdings CorporationThe United Illuminating Company

UniSource Energy CorporationTucson Electric Power CompanyUniSource Energy Services

Vectren CorporationVectren Energy Delivery-South

Westar Energy Inc.

Wisconsin Energy CorporationEdison Sault Electric CompanyWe Energies

Xcel Energy Inc.

EEI Member Companies with No Service Territory

American Transmission Company LLCDynegy Inc.

Electric Energy, Inc.ITC Holdings Corp.Mirant Corporation

Ohio Valley Electric CorporationVermont Electric Power Company, Inc.

Wolf Creek Nuclear Operating Corporation

Operating Utility

Parent CompanyUpdated June 4, 2008