Central Maine Power Co
Investor Owned electric utility · Maine · #64 of 3,199 U.S. utilities by customers · EIA utility #3266
Central Maine Power Co is a investor owned electric utility serving 592,687 customers in Maine. In 2025 it sold 4,602 gigawatt-hours of electricity for $1.22B in revenue, an average realized rate of 26.48¢ per kWh across all customer classes and 27.41¢ per kWh for residential customers. Its reported service territory covers 14 counties. EIA records its activities as: transmission, buying transmission, distribution.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 537,632 | 3,468 | $950.48M | 27.41¢ | |
| Commercial | 54,177 | 1,040 | $247.13M | 23.76¢ | |
| Industrial | 878 | 93.4 | $20.89M | 22.38¢ | |
| Total | 592,687 | 4,602 | $1.22B | 26.48¢ |
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 (538 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 554,139 | 4,889 | $766.57M | 16.46¢ |
| 2022 | 565,417 | 4,964 | $1.07B | 22.37¢ |
| 2023 | 566,581 | 4,623 | $1.24B | 27.45¢ |
| 2024 | 572,303 | 4,548 | $1.04B | 23.43¢ |
| 2025 | 592,687 | 4,602 | $1.22B | 27.41¢ |
Reliability (2025)
Average outage time (SAIDI): 318 minutes per customer per year
Average outages (SAIFI): 2.11 per customer
Average restoration time (CAIDI): 151 minutes
As reported for Maine 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: 5,709 GWh
Winter peak demand: 1,584 MW
Meters & rooftop solar (2025)
Smart (AMI) meters: 99.5% of 680,947 meters
Customer-sited generation (net metering): 75,892 installations, 1,577.9 MW of capacity
This utility also reported 72,288 delivery-only customers (4,105 GWh delivered) in 2025. Delivery figures are excluded from the totals above because the same electricity is also reported by the energy supplier - see Methodology.
Counties served
Androscoggin, MECumberland, MEFranklin, MEHancock, MEKennebec, MEKnox, MELincoln, MEOxford, MEPenobscot, MEPiscataquis, MESagadahoc, MESomerset, MEWaldo, MEYork, ME
Other large utilities in Maine
- Versant Power - 155,317 customers, residential 30.15¢
- Electricity Maine, LLC - 15,645 customers, residential 15.65¢
- Eastern Maine Electric Coop - 13,231 customers, residential 19.36¢
- Kennebunk Light & Power Dist - 7,596 customers, residential 13.46¢
- FairPoint Energy LLC - 5,560 customers, residential 17.68¢
- C. N. Brown Electricity, LLC - 5,516 customers, residential 11.28¢
- Houlton Water Company - 5,496 customers, residential 14.16¢
- XOOM Energy Maine, LLC - 4,016 customers, residential 13.61¢
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #3266 in the EIA frame.