Avista Utilities is a part of the Avista Corporation, a largest maker, supplier and transmission of the electricity and natural gas based in America. Avista Utilities was created in the year of 1889 by the Avista Corporation which provides energy services to approximately 600,000 natural gas and electric clients in northern Idaho, eastern Washington and some areas of eastern and southern Oregon with more than 1,500 employees. The company main office is situated in Spokane, Washington, United States. Today, it is providing energy solutions to the various clients including industrial, commercial, residential and business. The postal and official address, email address and phone number (helpline) of Avista Utilities service center is given above. The helpline of Avista Utilities service center may or may not be toll free.