American Electric Power - Provides electricity to customers in Indiana, Kentucky, Michigan, Ohio, Tennessee, Virginia, and West Virginia. Atmos Energy - Natural gas utility. Provides regulated service to customers in 12 states ranging from the Rocky Mountains to the Southeast, and manages pipelines and other industrial and municipal services in a larger region. El Paso Electric Company - Provides electricity to customers in West Texas and Southern New Mexico. Kansas City Power & Light - Provides electricity to customers in western Missouri and eastern Kansas. Xcel Energy - Utility supplier of electric power and natural gas service in Colorado, Michigan, Minnesota, New Mexico, North Dakota, South Dakota, Texas and Wisconsin. Allegheny Power System - Provides electricity to customers in Maryland, Ohio, Pennsylvania, Virginia, and West Virginia. Empire District Electric Co. - Provides electricity to southwestern Missouri and parts of Arkansas, Kansas, and Oklahoma. Idaho Power - Provides electricity to southern Idaho and eastern Oregon. Old Dominion Electric Cooperative - A power supply cooperative that supplies power to 14 locally owned electric cooperatives in Virginia, Maryland and Delaware.