| Exhibit                12                                                                |
|------------------------------------------------------------------------------------------|
| The                Peoples                Gas Light and Coke Company                     |
| Ratio                of                Earnings to Fixed Charges                         |
|                                                                                     |   |   |   |   |   |   |
|                                                                                     |   |   |   |   |   |   |
|                                                                                     |   | Three-Month |   |   |   |   |
|                                                                                     |   | Transition |   |   |   |   |
|                                                                                     | 2007 | Period                Ended | For                Fiscal                Years Ended September 30, |
| (Millions)                                                                               | 6                months | 12/31/2006 | 2006 | 2005 | 2004 | 2003 |
| EARNINGS                                                                                 |   |   |   |   |   |   |
| Earnings                on                common stock                                   | $8.7 | $19.1 | $(35.5) | $49.3 | $45.4 | $79.6 |
| Federal                and                state income taxes                             | 2.0 | 11.6 | (26.1) | 26.7 | 24.4 | 45.7 |
|                                                                                     |   |   |   |   |   |   |
| Net                pretax                income                                          | 10.7 | 30.7 | (61.6) | 76.0 | 69.8 | 125.3 |
|                                                                                     |   |   |   |   |   |   |
| Fixed                charges                                                             | 15.3 | 7.6 | 27.9 | 24.7 | 22.3 | 24.0 |
|                                                                                     |   |   |   |   |   |   |
| Total                earnings as defined                                                 | $26.0 | $38.3 | $(33.7) | $100.7 | $92.1 | $149.3 |
|                                                                                     |   |   |   |   |   |   |
| FIXED                CHARGES                                                             |   |   |   |   |   |   |
| Interest                on                long-term debt, including related amortization | $11.3 | $5.6 | $22.2 | $21.6 | $19.7 | $20.7 |
| Other                interest                                                            | 3.1 | 1.8 | 4.8 | 2.2 | 1.4 | 1.6 |
| Interest                factor applicable to rentals                                     | 0.9 | 0.2 | 0.9 | 0.9 | 1.2 | 1.7 |
|                                                                                     |   |   |   |   |   |   |
| Fixed                charges                                                             | $15.3 | $7.6 | $27.9 | $24.7 | $22.3 | $24.0 |
|                                                                                     |   |   |   |   |   |   |
| Ratio                of                earnings to fixed charges                         | 1.7 | 5.0 | (1.2) | 4.1 | 4.1 | 6.2 |

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