Realgy Energy Services is your natural gas and electricity marketer and can answer all your questions regarding natural gas and/or electric usage. However your local utility is still the regulated delivery company.
For all emergencies please contact your local utility at the following numbers:
| Ameren Illinois | 1-800-755-5000 |
| ComEd | 1-800-334-7661 |
| MidAmerican Energy | 800-799-4443 |
| Nicor Gas | 1-888-642-6748 |
| North Shore Gas | 866-556-6005 |
| Peoples Gas | 866-556-6002 |
| Citizens Gas | 1-800-427-4217 OR 317-924-3311 |
| Consumers Energy | 1-800-477-5050 |
| DTE | 1-800-477-4747 OR 1-800-947-5000 |
| MGU | 1-800-401-6451 |
| SEMCO | 1-888-427-1427 |