Sioux Valley SW Elec Coop
Cooperative electric utility · South Dakota · #538 of 3,199 U.S. utilities by customers · EIA utility #17267
Sioux Valley SW Elec Coop is a cooperative electric utility serving 30,059 customers in Minnesota, South Dakota. In 2025 it sold 960 gigawatt-hours of electricity for $113.81M in revenue, an average realized rate of 11.85¢ per kWh across all customer classes and 13.87¢ per kWh for residential customers. Its reported service territory covers 15 counties. EIA records its activities as: distribution.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 26,360 | 434 | $60.11M | 13.87¢ | |
| Commercial | 3,008 | 56.9 | $9.62M | 16.90¢ | |
| Industrial | 691 | 470 | $44.08M | 9.38¢ | |
| Total | 30,059 | 960 | $113.81M | 11.85¢ |
Average realized rate = revenue divided by sales as reported on EIA Form 861. It blends fixed charges, demand charges and riders into one per-kWh figure; it is not the utility's tariff rate. Estimated residential bill assumes the average residential customer's actual 2025 usage (1,371 kWh/month).
Operations by state
| State | Customers | Sales (GWh) | Residential rate |
|---|---|---|---|
| South Dakota | 26,164 | 820 | 13.94¢ |
| Minnesota | 3,895 | 140 | 13.54¢ |
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 27,141 | 868 | $91.16M | 12.15¢ |
| 2022 | 27,860 | 897 | $94.65M | 12.06¢ |
| 2023 | 28,652 | 933 | $97.21M | 11.97¢ |
| 2024 | 29,186 | 924 | $101.97M | 12.87¢ |
| 2025 | 30,059 | 960 | $113.81M | 13.87¢ |
Reliability (2025)
Average outage time (SAIDI): 59 minutes per customer per year
Average outages (SAIFI): 1.64 per customer
Average restoration time (CAIDI): 36 minutes
As reported for South Dakota under the IEEE standard, with major event days included where the standard reports them. Lower is better; see the reliability rankings.
Energy supply (2025)
Net generation: — GWh
Wholesale power purchased: 991 GWh
Winter peak demand: 170 MW
Energy losses: 2.9% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 100.0% of 30,059 meters
Customer-sited generation (net metering): 91 installations, 1.7 MW of capacity
Counties served
Brookings, SDDeuel, SDHamlin, SDKingsbury, SDLake, SDLincoln, MNMcCook, SDMiner, SDMinnehaha, SDMoody, SDMurray, MNNobles, MNPipestone, MNRock, MNTurner, SD
Other large utilities in South Dakota
- Black Hills Power, Inc. - 85,804 customers, residential 15.07¢
- NorthWestern Energy - (SD) - 65,396 customers, residential 13.35¢
- Southeastern Electric Coop Inc - (SD) - 24,428 customers, residential 12.98¢
- West River Electric Assn Inc - 21,332 customers, residential 15.16¢
- Watertown Municipal Utilities - 14,497 customers, residential 9.29¢
- City of Brookings - (SD) - 12,568 customers, residential 10.69¢
- Black Hills Electric Coop, Inc - 11,478 customers, residential 14.79¢
- Butte Electric Coop, Inc - 7,472 customers, residential —
All South Dakota utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #17267 in the EIA frame.