Power Out Map

Investor Owned utility · · MT

NorthWestern Energy LLC

In 2025, the average NorthWestern Energy LLC customer in Montana was without power for 125 minutes (2.1 hours), 48% less than the median Montana utility.

Outage minutes per customer 125min 2025, including major storms
Excluding major storm days 117min The everyday reliability of the network
Outages per customer a year 1.10 SAIFI, 2025
Residential price 14.4¢/kWh 2025 · Montana median 12.3¢

Reliability

Minutes in the dark, year by year

Average minutes without power per customer in Montana (SAIDI), with and without major event days, against the median Montana utility.

0 200 400 600 800 20182019202020212022202320242025 All days 125 No major storms 117 MT median 241

Price

Residential cents per kWh

Revenue from full-service residential customers divided by their sales, as reported to the EIA.

0.0 5.0 10.0 15.0 20.0 20182019202020212022202320242025 This utility 14.4 MT median 12.3

Territory

Counties served

Counties where NorthWestern Energy LLC reports customers. Open one for its full outage history.

Montana

BeaverheadBig HornBlaineBroadwaterCarbonCascadeChouteauDeer LodgeFergusGallatinGolden ValleyGraniteHillJeffersonJudith BasinLewis and ClarkLibertyMadisonMeagherMineralMissoulaMusselshellParkPhillipsPonderaPowellRavalliRosebudSandersSilver BowStillwaterSweet GrassTetonValleyWheatlandYellowstone

Wyoming

ParkTeton

Source: U.S. Energy Information Administration, Form EIA-861, 2018–2025. Reliability uses the IEEE 1366 standard where the utility reports it. Residential customers in 2025: 334,012.