Superior Water and Light Co
Investor Owned electric utility · Wisconsin · #870 of 3,199 U.S. utilities by customers · EIA utility #18336
Superior Water and Light Co is a investor owned electric utility serving 15,626 customers in Wisconsin. In 2025 it sold 1,076 gigawatt-hours of electricity for $95.64M in revenue, an average realized rate of 8.89¢ per kWh across all customer classes and 15.78¢ per kWh for residential customers. Its reported service territory covers 1 counties. EIA records its activities as: bundled.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 13,290 | 88.5 | $13.96M | 15.78¢ | |
| Commercial | 2,222 | 121 | $13.94M | 11.55¢ | |
| Industrial | 114 | 867 | $67.73M | 7.82¢ | |
| Total | 15,626 | 1,076 | $95.64M | 8.89¢ |
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 (555 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 15,198 | 795 | $71.71M | 13.99¢ |
| 2022 | 15,242 | 920 | $84.00M | 14.19¢ |
| 2023 | 16,180 | 1,003 | $89.05M | 14.90¢ |
| 2024 | 15,691 | 1,024 | $94.45M | 15.44¢ |
| 2025 | 15,626 | 1,076 | $95.64M | 15.78¢ |
Reliability (2025)
Average outage time (SAIDI): 25 minutes per customer per year
Average outages (SAIFI): 0.32 per customer
Average restoration time (CAIDI): 79 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: — GWh
Wholesale power purchased: 1,086 GWh
Winter peak demand: 149 MW
Energy losses: 0.9% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 96.9% of 15,626 meters
Counties served
Douglas, 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¢
- 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¢
All Wisconsin utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #18336 in the EIA frame.