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|           Exhibit12                                          |   |
|---------------------------------------------------------------------------------------|--------|
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| EL PASO NATURAL GAS COMPANY                                                           |   |
| COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES                                     |   |
| (DOLLARS IN MILLIONS)                                                                 |   |
|                                                                                  |   |
|                                                                                  |   | For the Six Months Ended June 30, |   |
|                                                                                  |   | 2009 |   |   |   | 2008 |   |
| Earnings                                                                              |   |   |   |   |
|     Pre-tax income                                                |   | $ | 113 |   |   |   | $ | 118 |   |
|     Fixed charges                                                 |   |   | 46 |   |   |   |   | 46 |   |
|        Totals earnings available for fixed charges |   | $ | 159 |   |   |   | $ | 164 |   |
|                                                                                  |   |   |   |   |   |   |   |   |   |
| Fixed charges                                                                         |   |   |   |   |   |   |   |   |   |
|     Interest and debt costs                                       |   | $ | 46 |   |   |   | $ | 46 |   |
|                                                                                  |   |   |   |   |   |   |   |   |   |
| Ratio of earnings to fixed charges                                                    |   |   | 3.5 |   |   |   |   | 3.6 |   |
|                                                                                  |   |

| For purposes of computing these ratios, earnings means pre-tax income before:                                                                                                                                        |   |   |   |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|--------|--------|
|     - fixed charges;                                                                                                                                                                             |   |   |   |   |   |   |   |   |   |   |
| less                                                                                                                                                                                                            |   |   |   |   |   |   |   |   |   |   |   |   |
|     - allowance for funds used during construction, which was not material for the six months       ended June 30, 2009 and 2008.                             |   |   |   |   |   |   |
|                                                                                                                                                                                                                 |   |   |   |   |   |   |   |   |   |   |   |   |
| Fixed charges means the sum of the following:                                                                                                                                                                        |   |   |   |   |   |   |   |   |   |
|     - interest costs, not including interest on tax liabilities which is included in income tax expense on our income statement;                                                                 |
|     - amortization of debt costs; and                                                                                                                                                            |   |   |   |   |   |   |   |   |   |   |
|     - that portion of rental expense which we believe represents an interest factor, which was not material for the six months       ended June 30, 2009 and 2008. |   |   |
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