Natural Gas

Note: For certified and registered electric suppliers, click Electric Choice/Plug In Illinois®.

• Atmos Energy Corporation
  Activated: Before January 1, 2000
• Central Illinois Light Company
  d/b/a AmerenCILCO
  Activated: November 3, 2004
• Central Illinois Public Service Company
  d/b/a AmerenCIPS
  Activated: November 3, 2004
• Consumers Gas Company
  Activated: Before January 1, 2000
• Illinois Gas Company
  Activated: Before January 1, 2000
• Illinois Power Company
  d/b/a AmerenIP
  Activated: November 3, 2004
• MidAmerican Energy Company
  Activated: Before January 1, 2000
• Mt. Carmel Public Utility Co.
  Activated: Before January 1, 2000
• North Shore Gas Company
  Activated: Before January 1, 2000
• Northern Illinois Gas Company
  d/b/a Nicor Gas Company
  Activated: May 11, 1998
• Peoples Gas Light and Coke Company, The
  Activated: Before January 1, 2000