Alabama Gas Corporation Arkansas Western Gas Company
Bay State Gas Company
Cascade Natural Gas Corporation Columbia Gas of Kentucky, Inc. Columbia Gas of Ohio, Inc. Columbia Gas of Pennsylvania, Inc. Columbia Gas of Virginia, Inc.
Distrigas S.A.
Florida Public Utilities Company
GAIL (India) Limited Gaz Métropolitain Limited Partnership
Hope Gas, Inc.
Intermountain Gas Company Italgas S.p.A.
Michigan Consolidated Gas Company Missouri Gas Energy MMC Corporation Berhad
National Grid Gas plc New Jersey Natural Gas Company
Osaka Gas Co., Ltd.
Pacific Northern Gas Ltd. Phoenix Natural Gas Limited Powerco Limited Public Utilities of the City of Indianapolis
Questar Gas Company
SEMCO Energy, Inc. Shell Gas & Power International B.V. Snam Rete Gas S.p.A. South Jersey Gas Company Southern California Gas Company Southern Connecticut Gas Company
Tennessee Gas Pipeline Company Terasen Gas Inc. The Berkshire Gas Company The East Ohio Gas Company The Peoples Natural Gas Company TOHO GAS CO., LTD. Tokyo Gas Co., Ltd.
Union Gas Limited
Vectren Energy Delivery of Ohio Inc. Vermont Gas Systems, Inc. Virginia Natural Gas, Inc.
West Texas Gas, Inc. Wisconsin Gas LLC
Yankee Gas Services Company