Northern States Power Co
Investor Owned electric utility · Wisconsin · #132 of 3,199 U.S. utilities by customers · EIA utility #13780
Northern States Power Co is a investor owned electric utility serving 273,992 customers in Michigan, Wisconsin. In 2025 it sold 6,872 gigawatt-hours of electricity for $804.54M in revenue, an average realized rate of 11.71¢ per kWh across all customer classes and 15.55¢ per kWh for residential customers. Its reported service territory covers 30 counties. EIA records its activities as: generation, transmission, buying transmission, distribution, wholesale marketing, bundled.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 230,313 | 1,994 | $310.10M | 15.55¢ | |
| Commercial | 43,560 | 2,777 | $322.22M | 11.60¢ | |
| Industrial | 119 | 2,101 | $172.21M | 8.20¢ | |
| Total | 273,992 | 6,872 | $804.54M | 11.71¢ |
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 (721 kWh/month).
Operations by state
| State | Customers | Sales (GWh) | Residential rate |
|---|---|---|---|
| Wisconsin | 265,062 | 6,742 | 15.56¢ |
| Michigan | 8,930 | 130 | 15.48¢ |
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 265,213 | 6,788 | $717.33M | 13.77¢ |
| 2022 | 266,930 | 6,967 | $803.61M | 15.07¢ |
| 2023 | 268,811 | 6,888 | $834.88M | 15.99¢ |
| 2024 | 271,298 | 6,726 | $794.24M | 15.80¢ |
| 2025 | 273,992 | 6,872 | $804.54M | 15.55¢ |
Reliability (2025)
Average outage time (SAIDI): 309 minutes per customer per year
Average outages (SAIFI): 1.15 per customer
Average restoration time (CAIDI): 269 minutes
As reported for Wisconsin 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: 958 GWh
Wholesale power purchased: 6,285 GWh
Winter peak demand: 1,117 MW
Energy losses: 5.1% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 97.7% of 276,493 meters
Customer-sited generation (net metering): 1,093 installations, 21.0 MW of capacity
Counties served
Ashland, WIBarron, WIBayfield, WIBuffalo, WIChippewa, WIClark, WICrawford, WIDunn, WIEau Claire, WIGogebic, MIIron, WIJackson, WILa Crosse, WILincoln, WIMarathon, WIMonroe, WIOneida, WIOntonagon, MIPepin, WIPierce, WIPolk, WIPrice, WIRusk, WISawyer, WISt Croix, WITaylor, WITrempealeau, WIVernon, WIVilas, WIWashburn, WI
Other large utilities in Wisconsin
- Wisconsin Electric Power Co - 1,179,163 customers, residential 20.53¢
- Wisconsin Power & Light Co - 505,706 customers, residential 18.47¢
- Wisconsin Public Service Corp - 472,199 customers, residential 17.20¢
- Madison Gas & Electric Co - 168,439 customers, residential 21.11¢
- Adams-Columbia Electric Coop - 39,826 customers, residential 18.98¢
- Polk-Burnett Electric Coop - 22,408 customers, residential 15.96¢
- Riverland Energy Cooperative - 20,219 customers, residential 16.19¢
- Barron Electric Coop - 19,794 customers, residential 16.02¢
All Wisconsin utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #13780 in the EIA frame.