Platts proposes to amend El Paso, South Mainline daily natural gas index methodology

Platts, part of S&P Global Energy, proposes to change its El Paso, South Mainline natural gas daily index methodology to include all locations on the South Mainline west of Cornudas station, excluding Ehrenberg. Changing the definition would align the methodology with Platts treatment of these trades.

The current methodology definition is: Deliveries on El Paso's south mainline at points between Cornudas station in West Texas, to but not including Ehrenberg, Arizona.

The proposed methodology definition is: Deliveries on El Paso's south mainline west of the Cornudas station in West Texas, but not including Ehrenberg, Arizona.

The proposed changes would take effect on trade date Jan. 30, 2026 for delivery on Feb. 1- 2.

Platts invites all interested parties to provide feedback on this proposal. Please submit any comments to AmericasGasPricing@spglobal.com and pricegroup@spglobal.com by Dec. 23, 2025.

For written comments, please clearly indicate if any portion is not intended for publication by Platts for public viewing. Platts will consider all comments received and will make comments not marked as confidential available upon request.