National Fuel Gas Company is a holding company. The Company is a diversified energy company engaged principally in the production, gathering, transportation, storage and distribution of natural gas. Its segments include Exploration and Production, Pipeline and Storage, Gathering, and Utility. The Exploration and Production segment is engaged in the exploration for, and the development and production of, primarily natural gas in the Appalachian region of the United States. The Pipeline and Storage segment provides interstate natural gas transportation services for affiliated and nonaffiliated companies through integrated gas pipeline systems in Pennsylvania and New York. The Gathering segment builds, owns, and operates natural gas processing and pipeline gathering facilities in the Appalachian region. The Utility segment provides natural gas utility services to approximately 754,000 customers through a local distribution system located in western New York and northwestern Pennsylvania.