Natural Gas Transmission & Storage
Our Service Territory
NorthWestern Energy provides natural gas service to customers in Montana, South Dakota and Nebraska.
Open Season Notice
North Pool to South Pool Firm Transportation Open Season
NorthWestern Energy has nearly 2,300 miles of natural gas transmission pipeline.
NorthWestern Energy has about 7,700 miles of distribution pipeline serving 305,000 customers in Montana, Nebraska and South Dakota.
NorthWestern Energy owns and operates natural gas storage fields and contracts with a firm natural gas storage service.
South Dakota Natural Gas Expansion
NorthWestern Energy is excited to bring commercial and residential natural gas service to the quickly developing areas of South Sioux Falls - the Tea and Harrisburg areas.