Power Out Map

Investor Owned utility · · SD

NorthWestern Energy

In 2025, the average NorthWestern Energy customer in South Dakota was without power for 120 minutes (2.0 hours), about the same as the median South Dakota utility.

Outage minutes per customer 120min 2025, including major storms
Excluding major storm days 82min The everyday reliability of the network
Outages per customer a year 1.14 SAIFI, 2025
Residential price 13.3¢/kWh 2025 · South Dakota median 12.9¢

Reliability

Minutes in the dark, year by year

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

0 50 100 150 200 20182019202020212022202320242025 All days 120 No major storms 82 SD median 130

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 20182019202020212022202320242025 This utility 13.4 SD median 12.9

Territory

Counties served

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

South Dakota

AuroraBeadleBon HommeBrownBruleCharles MixClarkCodingtonDavisonDayDeuelDouglasEdmundsFaulkHamlinHandHansonHughesHutchinsonHydeJerauldKingsburyMarshallSanbornSpinkTurnerYankton

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: 51,787.