Alagasco
Air Products and Chemicals
Baltimore Gas & electric Company
Bangor Gas Company
Bay State Gas Company
Berkshire Gas Company
BOC Gas Company
Boston Thermal Energy
Central Hudson Gas & Electric
Chevron USA
Colonial Gas Co.
Commonwealth Gas
CNG Transmission Corporation
Distrigas LNG Terminal
Dow Pipelilne Company
Duke Energy/Maritimes Northeast
Energy East
Energy North Natural Gas
Fall River Gas Company
Fitchburg Gas & Electric Company
Granite State Transmission Corporation
Holyoke Gas and Electric Department
Honeywell, Inc.
Inland Steel Company
Intermountain Gas

Keyspan
Korea Gas Corporation
Lower Valley Energy
Metropolitan Utility District
MG Industries
Monsanto
N-Star
NISource
Northern Illinois Gas
Northeast Utilities/Yankee Gas
North Shore Gas Company
Northwest Natural Gas
Norwich Public Utilities
Peoples Gas Light & Coke Company
Philadelphia Electric Company
Public Service Electric & Gas Company
Savannah Gas Company
Shell Oil
Southern CT Gas Company
Taunton Municipal Light
Valley Gas company
Vermont Gas
Washington Gas Light Company
Westfield Gas & Electric Department