Alabama Power

Alectra Utilities

Austin Energy

Avista

Black Hills Energy

Cascade Natural Gas

Central Hudson

Central Maine Power

Chesapeake Utilities

Citizens Energy Group

CLECO

Columbia Gas (PA)

ComEd

ConEdison

Connexus

Consumers Energy

CoServ

CPS Energy

Dayton Pwr & Light (Now AES Ohio)

Dominion Energy (SC)

DTE

Duquesne Light

El Paso Electric

Enbridge Union Gas

Entergy

EPB

EPCOR

Evergy

Eversource (MA)

Eversource (NH)

Florida Public Utilities

Georgia Power

Great Plains Natural Gas

Green Mountain Power

GreyStone Power

GRU

Hawaiian Electric

Hydro One

Hydro Ottawa

Idaho Power

Intermountain Gas

IPL (Now AES Indiana)

Jackson EMC

JEA

Kentucky Utilities & ODP

KUB

Lansing Board of Water & Light

LCEC

LG&E

London Hydro

Manitoba Hydro

MidAmerican Energy

Minnesota Power

Montana-Dakota Utilities

Nashville Electric Service

NB Power

New Mexico Gas

Newfoundland Power

Nicor Gas

North Indiana Public Service Co.

Northwest Natural

NorthWestern Energy

Nova Scotia Power

NV Energy - North

NV Energy - South

NYSEG

OG&E

Oklahoma Natural Gas

Orange & Rockland Utilities

Ozarks Electric Cooperative

Pacific Gas & Electric

PacifiCorp (Pacific Pwr / Rocky Mtn Pwr)

Peoples Natural Gas

Philadelphia Gas Works

Piedmont Natural Gas

PNM

Puget Sound Energy

Rappahannock Electric Coop

Rochester Gas & Electric

Saskatoon L&P

SaskPower

SDG&E

Seattle City Light

SMECO

SMUD

SoCalGas

Southern California Edison

Southwest Gas

Tacoma Public Utilities

Tampa Elec & Peoples Gas

Texas Gas Service

Toronto Hydro

Tucson Electric

UGI Utilities

Unitil

Versant Power

We Energies

Wisconsin Public Service

Xcel Energy