NorthWestern Energy is an investor-owned utility and one of the largest providers of electricity and natural gas in the upper Midwest and Northwest. The company serves approximately 650,000 customers in Montana, South Dakota and Nebraska. NorthWestern Energy actively seeks energy savings through Demand Side Management Programs (DSM). In 2007, DSM procurement activities resulted in four megawatts of energy savings. NorthWestern Energy reaches out to customers regularly to inform and educate them on energy efficiency, provides incentive programs, and sponsors workshops and demonstrations that promote energy sustainability.