Our Natural Gas and Electric Service
NorthWestern Energy serves communities in Montana, South Dakota and Yellowstone National Park with safe and reliable electricity. We serve natural gas to communities in Montana, South Dakota and Nebraska.
Our Company
For more than 100 years, NorthWestern Energy has been committed to delivering safe, reliable and innovative energy solutions.
We serve gas and electric to customers in the western two-thirds of Montana and eastern South Dakota. We also have gas service in Nebraska and serve electricity to Yellowstone National Park.
NorthWestern owns and operates a diverse generation fleet of wind, water, natural gas and coal-fired resources and the high-voltage electric transmission system and distribution system. We also own and operate natural gas production, transmission and distribution systems.
We serve gas and electric to customers in the western two-thirds of Montana and eastern South Dakota. We also have gas service in Nebraska and serve electricity to Yellowstone National Park.
NorthWestern owns and operates a diverse generation fleet of wind, water, natural gas and coal-fired resources and the high-voltage electric transmission system and distribution system. We also own and operate natural gas production, transmission and distribution systems.
Enriching Lives Through a Safe, Sustainable Energy Future
Enriching Lives Through a Safe, Sustainable Energy Future
NorthWestern Energy has provided reliable and affordable electricity and natural gas to customers in Montana, South Dakota and Nebraska for more than 100 years.
Our Commitment to Sustainability
Sustainability means meeting today’s needs while planning for tomorrow’s as well.
NorthWestern Energy at a glance
850,300
customers served across Montana, South Dakota, Nebraska and Yellowstone National Park
1,667
employees working across our service territory
52%
carbon-free electric generation
Our vision
Enriching lives through a safe and sustainable energy future.
Our mission
Working together to deliver safe, reliable and affordable energy.
Our values
SERVICE: Safety, Excellence, Respect, Value, Integrity, Community, Environment
Our Hydro Facilities
Our carbon-free hydro system is the foundation of our energy generation portfolio in Montana.
Giving Back to Our Communities
NorthWestern Energy is committed to being a good corporate citizen of all the communities we serve.
Where Does Your Energy Come From?
We provide safe, reliable energy through a balanced mix of clean energy and traditional resources.
NorthWestern Energy to Purge Natural Gas Pipeline in Great Falls
Date: Oct 12, 2026
TYPE: News
Great Falls, Mont. – Oct. 12, 2026 – NorthWestern Energy will be purging natural gas from a pipeline in the 900 block of 9th Street between 2nd Avenue North & 4th Avenue South in Great Falls, Mont. on Oct. 14.
As part of this planned work, natural gas will be safely removed from a pipeline that will no longer be in service. During the purge, people in the area may notice the odor of mercaptan, the substance NorthWestern Energy adds to natural gas to make it detectable. Mercaptan has a distinctive odor often described as a rotten egg smell.
Trained professionals following established safety procedures will conduct the work and use gas monitoring equipment, maintain controlled work zones and vent gas in a safe manner away from the public.
For the safety of crews and the public, stay clear of work areas and do not approach equipment, personnel or vehicles associated with the purging operation.
While this odor is expected during the pipeline purging work, anyone who observes conditions that may indicate a natural gas leak should leave the area immediately, move to a safe location and call 911. Do not create a spark or use anything that could ignite the gas, including telephones, cell phones, matches, lighters, electrical switches, vehicles or other electronic devices.
NorthWestern Energy appreciates the public's patience and understanding while this work is completed.
Follow us on Facebook and LinkedIn and Instagram: @NorthWesternEnergy
NorthWestern Energy - Delivering a Bright Future
NorthWestern Energy, provides essential energy infrastructure and valuable services that enrich lives and empower communities while serving as long-term partners to our customers and communities. We work to deliver safe, reliable, and innovative energy solutions that create value for customers, communities, employees, and investors. We do this by providing low-cost and reliable service performed by highly-adaptable and skilled employees. We provide electricity and / or natural gas to approximately 850,300 customers in Montana, South Dakota, Nebraska, and Yellowstone National Park. Our operations in Montana and Yellowstone National Park are conducted through our subsidiary, NW Corp, and our operations in South Dakota and Nebraska are conducted through our subsidiary, NWE Public Service. We have provided service in South Dakota and Nebraska since 1923 and in Montana since 2002.
Media Contacts:
Jo Dee Black
866-622-8081