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NorthWestern Energy - (SD)
Investor Owned · South Dakota · 2025 data from EIA Form 861
- Customers
- 65,396
- 2025
- Average home price
- 13.35¢/kWh
- South Dakota average 13.32¢/kWh in 2025
- Average home bill
- $125/mo
- 2025
- Counties served
- 27
About this utility
- EIA utility number
- 13809
- Ownership
- Investor Owned
- Reliability region
- MRO
- Business
- Generation, Transmission, Distribution, Wholesale sales, Bundled service
- States
- South Dakota
- Service
- Generation and delivery
Sales in South Dakota
2025. Price is revenue divided by kilowatt-hours sold
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| Customer class | Customers | Revenue | Sales | Price | Home bill |
|---|---|---|---|---|---|
| Residential | 51,787 | $77.9 million | 583 GWh | 13.35¢/kWh | $125/mo |
| Commercial | 13,551 | $89.4 million | 687 GWh | 13.02¢/kWh | |
| Industrial | 58 | $34.2 million | 386 GWh | 8.85¢/kWh | |
| All customers | 65,396 | $201.5 million | 1.66 TWh | 12.16¢/kWh |
Counties served
As reported to EIA. A utility may serve only part of a county
- Aurora County
- Beadle County
- Bon Homme County
- Brown County
- Brule County
- Charles Mix County
- Clark County
- Codington County
- Davison County
- Day County
- Deuel County
- Douglas County
- Edmunds County
- Faulk County
- Hamlin County
- Hand County
- Hanson County
- Hughes County
- Hutchinson County
- Hyde County
- Jerauld County
- Kingsbury County
- Marshall County
- Sanborn County
- Spink County
- Turner County
- Yankton County
Power plants operated
Operating capacity from the EIA-860M generator inventory
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| Plant | Fuel | Capacity |
|---|---|---|
| Aberdeen CTSouth Dakota | Natural gas | 111 MW |
| Beethoven WindSouth Dakota | Wind | 80.0 MW |
| Bob Glanzer Generating StationSouth Dakota | Natural gas | 69.0 MW |
| YanktonSouth Dakota | Natural gas | 13.4 MW |
| Clark (SD)South Dakota | Petroleum | 2.7 MW |
| FaulktonSouth Dakota | Petroleum | 2.7 MW |
Figures are what the utility reported to EIA for the year. Retail electricity providers in states with customer choice report energy sales only, and delivery companies report delivery charges only, so their prices are not a full bill.
Frequently asked questions
- How many customers does NorthWestern Energy - (SD) have?
- NorthWestern Energy - (SD) reported 65,396 electric customers (meters) in 2025.
- What does NorthWestern Energy - (SD) charge for electricity?
- Homes served by NorthWestern Energy - (SD) paid an average of 13.35¢/kWh in 2025, which is total residential revenue divided by kilowatt-hours sold. The average home bill was about $125 a month.
- What area does NorthWestern Energy - (SD) serve?
- NorthWestern Energy - (SD) reports serving 27 counties in South Dakota.
Source: U.S. Energy Information Administration, Form EIA-861 (2025) · Data for 2025