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Energy utility companies by state
| California | Illinois | Massachusetts | New York | Texas |
| Connecticut | Maine | Michigan | Ohio | |
| Georgia | Maryland | New Jersey | Pennsylvania |
California
Connecticut
- Eversource Energy
- United Illuminating
Georgia
Illinois
Indiana
Maryland
Massachusetts
Michigan
New Jersey
New York
- Con Edison
- National Grid
- Niagara Mohawk
- NYSEG
- Orange and Rockland Utilities
- Rochester Gas and Electric (RG&E)
Ohio
- AEP Ohio
- Columbia Gas
- Dayton Power and Light
- Dominion Power
- Duke Energy
- FirstEnergy Corp.
- Ohio Edison
- Toledo Edison