Avista Utilities: Avista is involved in the production, transmission and distribution of energy. We provide energy services a ... nd electricity to 360,000 customers and natural gas to 321,000 customers in a service territory that covers 30,000 square miles in eastern Washington, northern Idaho and parts of southern and eastern Oregon, with a population of 1.5 million. Avista is an operating division of Avista Corp. www.myavista.com read more