Wisconsin Public Service Corp
Investor Owned electric utility · Wisconsin · #86 of 3,199 U.S. utilities by customers · EIA utility #20860
Wisconsin Public Service Corp is a investor owned electric utility serving 472,199 customers in Wisconsin. In 2025 it sold 11,081 gigawatt-hours of electricity for $1.30B in revenue, an average realized rate of 11.73¢ per kWh across all customer classes and 17.20¢ per kWh for residential customers. Its reported service territory covers 22 counties. EIA records its activities as: generation, buying transmission, distribution, buying distribution, wholesale marketing, bundled.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 415,643 | 3,072 | $528.36M | 17.20¢ | |
| Commercial | 56,366 | 4,090 | $478.27M | 11.69¢ | |
| Industrial | 190 | 3,919 | $293.19M | 7.48¢ | |
| Total | 472,199 | 11,081 | $1.30B | 11.73¢ |
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 (616 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 454,892 | 11,046 | $1.06B | 13.94¢ |
| 2022 | 458,948 | 11,065 | $1.17B | 15.07¢ |
| 2023 | 463,129 | 10,817 | $1.24B | 16.57¢ |
| 2024 | 467,910 | 10,803 | $1.21B | 16.23¢ |
| 2025 | 472,199 | 11,081 | $1.30B | 17.20¢ |
Reliability (2025)
Average outage time (SAIDI): 630 minutes per customer per year
Average outages (SAIFI): 1.44 per customer
Average restoration time (CAIDI): 438 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: 11,446 GWh
Wholesale power purchased: 2,748 GWh
Winter peak demand: 1,652 MW
Energy losses: 3.5% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 100.0% of 479,003 meters
Customer-sited generation (net metering): 2,627 installations, 90.8 MW of capacity
Counties served
Brown, WICalumet, WIDoor, WIFlorence, WIFond Du Lac, WIForest, WIIron, WIKewaunee, WILanglade, WILincoln, WIManitowoc, WIMarathon, WIMarinette, WIOconto, WIOneida, WIOutagamie, WIPortage, WIShawano, WIVilas, WIWaupaca, WIWaushara, WIWinnebago, 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¢
- Northern States Power Co - 273,992 customers, residential 15.55¢
- 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 #20860 in the EIA frame.