Adams-Columbia Electric Coop
Cooperative electric utility · Wisconsin · #423 of 3,199 U.S. utilities by customers · EIA utility #108
Adams-Columbia Electric Coop is a cooperative electric utility serving 39,826 customers in Wisconsin. In 2025 it sold 624 gigawatt-hours of electricity for $87.53M in revenue, an average realized rate of 14.04¢ per kWh across all customer classes and 18.98¢ per kWh for residential customers. Its reported service territory covers 12 counties. EIA records its activities as: buying transmission, distribution, buying distribution.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 36,159 | 279 | $52.95M | 18.98¢ | |
| Commercial | 2,619 | 96.8 | $12.54M | 12.96¢ | |
| Industrial | 1,048 | 248 | $22.04M | 8.89¢ | |
| Total | 39,826 | 624 | $87.53M | 14.04¢ |
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 (643 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 38,384 | 557 | $72.01M | 15.82¢ |
| 2022 | 38,812 | 619 | $84.69M | 17.19¢ |
| 2023 | 39,141 | 639 | $82.98M | 17.43¢ |
| 2024 | 39,455 | 599 | $80.81M | 17.63¢ |
| 2025 | 39,826 | 624 | $87.53M | 18.98¢ |
Reliability (2025)
Average outage time (SAIDI): 108 minutes per customer per year
Average outages (SAIFI): 0.87 per customer
Average restoration time (CAIDI): 124 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: 656 GWh
Winter peak demand: 103 MW
Meters & rooftop solar (2025)
Smart (AMI) meters: 100.0% of 39,826 meters
Customer-sited generation (net metering): 362 installations, 3.1 MW of capacity
Counties served
Adams, WIColumbia, WIDane, WIDodge, WIGreen Lake, WIJefferson, WIMarquette, WIPortage, WISauk, WIWaupaca, WIWaushara, WIWood, 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¢
- 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 #108 in the EIA frame.