DIMP Plan Member Companies
- New Jersey Natural Gas Company
- Alabama Gas Corp
- SCANA
- TECO Peoples Gas
- Memphis Gas, Light & Water Division
- LG&E Energy, LLC
- NSTAR Gas
- South Jersey Gas Company
- Rochester Gas & Electric Corp.
- New York State Electric & Gas Corp
- Yankee Gas Services Company
- Unitil
- Vermont Gas Systems, Inc.
- Berkshire Gas Company
- City of Holyoke Gas and Electric Department
- St. Lawrence Gas Company, Inc.
- Corning Natural Gas Corporation
- Westfield Gas and Electric Light Dept
- Norwich Public Utilities
- Wakefield Municipal Gas and Light Dept
- Middleborough Gas and Electric Department
- Maine Natural Gas
- Blackstone Gas Company
- National Grid
- NiSource
- Atmos Energy Corp
- AGL Resources
- Nicor Gas
- ONEOK, Inc.
- PSE&G
- Consolidated Edison of New York
- Piedmont Natural Gas
- Washington Gas
- National Fuel
- NW Natural
- Laclede Gas Company
- Southern Connecticut Gas Company
- Connecticut Natural Gas Corp
- Arkansas Western Gas Company
- Entergy New Orleans, Inc.
- Orange & Rockland Utilities, Inc.
- Mobile Gas
- Florida Public Utilities Company
- Central Hudson Gas and Electric Corp
- Arkansas Oklahoma Natural Gas Corp
- Roanoke Natural Gas
- New England Gas Company