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|           Exhibit 12                                        |   |
|--------------------------------------------------------------------------------------|--------|
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| EL PASO NATURAL GAS COMPANY                                                     |   |
| COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES                                    |   |
| (DOLLARS IN MILLIONS)                                                                |   |
|                                                                                 |   |
|                                                                                 |   | For the Six Months endedJune 30, |   |
|                                                                                 |   | 2010 |   |   |   | 2009 |   |
| Earnings                                                                             |   |   |   |   |
|    Income before income taxes                                         |   | $ | 83 |   |   |   | $ | 113 |   |
|    Fixed charges                                                      |   |   | 47 |   |   |   |   | 46 |   |
|        Total earnings available for fixed charges |   | $ | 130 |   |   |   | $ | 159 |   |
|                                                                                 |   |   |   |   |   |   |   |   |   |
| Fixed charges                                                                        |   |   |   |   |   |   |   |   |   |
|    Interest and debt expense                                          |   | $ | 47 |   |   |   | $ | 46 |   |
|                                                                                 |   |   |   |   |   |   |   |   |   |
| Ratio of earnings to fixed charges                                                   |   |   | 2.8 |   |   |   |   | 3.5 |   |

| For purposes of computing these ratios, earnings means income before income taxes:                                                                                                                        |   |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|
|     - fixed charges;                                                                                                                                                                       |   |   |   |   |   |   |   |   |
| less                                                                                                                                                                                                      |   |   |   |   |   |   |   |   |
|     -allowance for funds used during construction, which was not material for the six months ended June 30, 2010 and 2009.                                                                 |
|                                                                                                                                                                                                           |   |   |   |   |   |   |   |   |   |   |
| 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, 2010 and 2009. |

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