Arizona's local gas companies buy natural gas from producers in the supply basins and then pay the interstate pipelines to transport the gas to their local service territories. Arizona gets its natural gas from two main underground supply basins: the San Juan Basin in New Mexico and the Permian Basin in Texas. The gas is then injected into the interstate pipeline system for delivery into Arizona. Arizona is served by a number of interstate pipeline systems including Kinder Morgan's El Paso Natural Gas system, Energy Transfer Partners' Transwestern Pipeline system, Dominion Energy's Soutehrn Trails Pipeline, and TransCanada's North Baja Pipeline.The northern part of the state is served by El Paso Natural Gas Company's northern system, Cross Country Energy Corp's Transwestern pipeline, and Questar's Southern Trails pipeline. The central and southern part of Arizona is served by El Paso Natural Gas Company's southern system.

The Commission has limited jurisdiction over the propane gas industry. The Commission regulates propane systems that are also public utilities such as Alliant Gas and Copper Market. Additionally, our Pipeline Safety Section oversees state schools on Indian reservations that use propane through a distributed system serving multiple buildings. The Commission does not regulate consumer propane filling stations such as the neighborhood station where a consumer might refill a gas grill tank.