- Allegheny Power System
Provides electricity to customers in Maryland, Ohio, Pennsylvania, Virginia, and West Virginia.
- American Electric Power
Provides electricity to customers in Indiana, Kentucky, Michigan, Ohio, Tennessee, Virginia, and West Virginia.
- Atmos Energy
Natural gas utility serving customers in 12 states, mostly in the Southeast.
- Dominion Resources
Providing electricity to customers in Virginia and North Carolina.
- Duke Energy Corporation
Provides electricity to customers in North and South Carolina. Also provides natural gas to customers in the Northeast, Midwest, and Gulf Coast areas.
- ECONnergy Energy Co., Inc
Suppliers of deregulated energy. Natural gas and electricity. Programs throughout NY, NJ and PA.
- El Paso Electric Company
Provides electricity to customers in West Texas and Southern New Mexico.
- Empire District Electric Co.
Provides electricity to southwestern Missouri and parts of Arkansas, Kansas, and Oklahoma.
- Entergy Corporation
Provides electricity to customers in Arkansas, Louisiana, Mississippi, and Texas.
- ICAP Energy
An over-the-counter broker of natural gas, electricity and coal. Includes links and information about industry transportation, production and generation, financial markets, weather forecasting and hedging.
- Idaho Power
Provides electricity to Idaho, Oregon, and Nevada.
- Kansas City Power & Light
Provides electricity to customers in western Missouri and eastern Kansas.
- LG&E Energy Corp.
Provides natural gas and electricity for customers in Kentucky and Virginia.
- Northeast Utilities
An electric utility holding company that serves customers in Connecticut, western Massachusetts and New Hampshire.
- NUI Corp.
Natural gas utility servicing customers in New Jersey, Florida, North Carolina, Pennsylvania, and Maryland.
- Old Dominion Electric Cooperative
A power supply cooperative that supplies power to 14 locally owned electric cooperatives in Virginia, Maryland and Delaware.
- Tennessee Valley Authority
Government corporation. The largest power producer in the U.S.
- Xcel Energy
Formed by the merger of Minneapolis-based Northern States Power Co. and Denver-based New Century Energies, Xcel Energy serves 12 states.
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