State Consumer Advocates
- Arizona Residential Utility Consumer Office
- Connecticut Office of Consumer Counsel
- DC Office of People’s Counsel
- Indiana Office of Utility Consumer Counselor
- Maine Office of Public Advocate
- Maryland Office of People’s Counsel
- Massachusetts Attorney General
- New Hampshire Office of Consumer Advocate.
- New Jersey Ratepayer Advocate
- Nova Scotia Consumer Advocate
- Ohio Consumers’ Counsel
- South Carolina Department of Consumer Affairs
- Utah Committee (later Office) of Consumer Services
- Vermont Department of Public Service
- Washington Office of the Attorney General
- West Virginia Consumer Advocate
- Wisconsin Citizens’ Utilities Board
Public Interest Groups
- AARP
- Alliance Against Power Plant Location, Brockton
- Alliance for Affordable Energy, Louisiana
- Campaign for an Energy-Efficient Ohio
- Citizens Action Coalition, Indiana
- Energy Coordinating Agency of Philadelphia
- PennFuture
- Residential Ratepayers Consortium, Michigan
- Vermont Public Interest Research Group
Other government agencies
- Connecticut Department of Public Utilities Control
- Massachusetts Department of Energy Resources
- Massachusetts Energy Facilities Siting Council
- Pennsylvania Energy Office
- Public Utilities Commission of Ohio
Local governments
- City of Chicago
- City of Cincinnati
- City of Claremont, N.H.
- City of New York
- Town of Eastchester and City of New Rochelle, New York
- Town of Killingly, Connecticut
- Town of Sandwich, Massachusetts
- Town of Wilbraham, Massachusetts
Environmental Groups
- British Columbia Sustainable Energy Association
- Center for Biological Diversity, Puerto Rico
- Coalition of Environmental and Energy Organizations, Quebec
- Conservation Law Foundation
- EarthJustice
- Floridians for Responsible Utility Growth
- Green Action Centre/Resource Conservation Manitoba
- Green Energy Coalition, Ontario
- Izaak Walton League
- Legal Environmental Assistance Foundation
- Michigan United Conservation Clubs
- National Audubon Society
- Natural Resources Council of Maine
- Natural Resources Defense Council
- Pace Energy Project
- Penobscot River Coalition
- Sierra Club (US and Canada)
- Southern Environmental Law Center
- The Climate and Energy Project, Kansas
- Vermont Natural Resources Council
Other Market Participants
- Alberta Federation of Rural Electrical Associations and Association of Municipal Districts & Counties
- Boston Gas Company
- Cape Light Compact
- Destec Energy
- Efficiency Vermont
- Equitable Resources
- Freehold Cogeneration Associates
- Gas Recovery Systems LLC
- Green Mountain Energy
- North Carolina Hydro-Electric Power Producers’ Group
- Philadelphia Gas Works
- Potomac Electric Power Company
- Providence Gas and Valley Gas, Rhode Island
- Refusetech Massachusetts
- Riverside Steam and Electric Company
- School Energy Coalition of Ontario
- Utility Workers Union of America