NorthWestern_Energy
NorthWestern Energy
American utility company
NorthWestern Energy Group, Inc. is a utility company that serves South Dakota, Nebraska, and Montana that is based in Sioux Falls. As of 2019[update], the company serves approximately 718,000 customers.[1] The company's corporate headquarters are located in Sioux Falls while the headquarters for the South Dakota operations (and which was the headquarters for the old NorthWestern Public Service Company) are in Huron, South Dakota.
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