States › Maine › Central Maine Power Co
investor-owned utility · EIA utility 3266
Central Maine Power Co
Average price is revenue divided by sales for the sector and year; it is not a tariff rate. Reliability figures are as reported by utilities to EIA on Form 861 and may use different calculation methods. Annual figures: Form EIA-861 for 2024, final release. Monthly state figures run to July 2026.
Central Maine Power Co is an investor-owned utility that reported 577,955 residential customers in Maine on Form EIA-861 for 2024, with a service territory that touches 14 counties.
Its average residential price that year was 23.43¢ per kilowatthour, 3.5% below the Maine average of 24.29¢ and 42% above the US average of 16.48¢. The figure is residential revenue divided by residential sales, so it folds in fixed charges, riders and every rate schedule the utility bills under.
That works out to an average residential bill of $130.57 a month on average use of 557 kWh a month. Across Maine the average bill was $133.60 on 550 kWh, so a bill gap reflects how much power households use as well as what each kilowatthour costs.
The price covers the 519,295 residential customers on bundled service. A further 58,660 take delivery only and buy their energy from another supplier; EIA collects just part of their bill from this respondent, so they are left out of the average.
For reliability it reported a SAIDI of 1,893.5 minutes per customer with major event days included and 215.4 minutes with them excluded, calculated under IEEE 1366 standard. The median among Maine utilities reporting was 1,206.0 minutes with major event days; this utility's figure is 57% above that median.
The average price is up 35.3% on 2019, against up 35.8% for Maine as a whole, and down 14.6% on 2023. EIA's early release for 2025, which has not been fully edited, shows 27.41¢.
Compared with Maine, the US and other investor-owned utilities
| Measure, 2024 | This utility | Investor-owned utilities, US median | Maine | United States |
|---|---|---|---|---|
| Average residential price per kWh | 23.43¢ | 16.17¢ | 24.29¢ | 16.48¢ |
| Average monthly residential bill | $130.57 | $131.47 | $133.60 | $142.26 |
| Average monthly use, kWh | 557 | 787 | 550 | 863 |
| Residential price change, 1 year | -14.6% | — | -11.4% | +3.0% |
| Residential price change, 5 years | +35.3% | — | +35.8% | +26.7% |
| SAIDI, all events (minutes) | 1,893.5 | 278.7 | 1,206.0 median | 184.5 median |
| SAIDI, without major event days | 215.4 | 106.5 | 478.0 median | 99.8 median |
State and US prices, bills and use are EIA's own averages over every customer. The ownership column and the reliability columns are medians across utilities with at least 1,000 residential customers, computed on this site from the final 2024 file. In Maine this utility's price ranks 2 of 5, counting from the highest.
Average price by year
Central Maine Power CoMaine averageUS average
Year by year
| Year | ¢ per kWh | Maine ¢ | Monthly bill | kWh a month | Residential customers | All sales |
|---|---|---|---|---|---|---|
| 2025 early release | 27.41¢ | 27.78¢ | $147.32 | 538 | 584,462 | 8.7 TWh |
| 2024 | 23.43¢ | 24.29¢ | $130.57 | 557 | 577,955 | 8.8 TWh |
| 2023 | 27.45¢ | 27.42¢ | $155.25 | 566 | 567,972 | 8.8 TWh |
| 2022 | 22.37¢ | 22.44¢ | $132.62 | 593 | 565,172 | 9.3 TWh |
| 2021 | 16.46¢ | 17.02¢ | $98.37 | 598 | 560,186 | 9.1 TWh |
| 2020 | 16.24¢ | 16.81¢ | $94.42 | 581 | 557,067 | 8.9 TWh |
| 2019 | 17.32¢ | 17.89¢ | $98.42 | 568 | 551,512 | 9.2 TWh |
| 2018 | 16.16¢ | 16.84¢ | $94.15 | 583 | 550,974 | 9.9 TWh |
| 2017 | 15.08¢ | 15.97¢ | $83.51 | 554 | 549,555 | 8.9 TWh |
| 2016 | 14.62¢ | 15.83¢ | $80.64 | 551 | 540,499 | 9 TWh |
| 2015 | 14.61¢ | 15.61¢ | $80.86 | 553 | 541,351 | 9.2 TWh |
| 2014 | 14.91¢ | 15.27¢ | $43.49 | 292 | 549,516 | 9.3 TWh |
| 2013 | 14.30¢ | 14.35¢ | $33.06 | 231 | 547,060 | 9.2 TWh |
Bundled residential service only in the price, bill and use columns. Bill = residential revenue ÷ customers ÷ 12; use = residential sales ÷ customers ÷ 12. EIA describes its early release as not fully edited; it is shown for this utility alone and enters no average, median or rank on this site.
Month by month
Central Maine Power CoMaine average
Sales by sector, 2024
| Sector | Customers | Sales | Share of sales | Revenue | ¢ per kWh, bundled |
|---|---|---|---|---|---|
| Residential | 577,955 | 3.9 TWh | 44% | $864,098,000 | 23.43¢ |
| Commercial | 77,668 | 3.3 TWh | 37% | $364,053,000 | 21.08¢ |
| Industrial | 1,705 | 1.7 TWh | 19% | $86,322,000 | 20.36¢ |
Customers, sales and revenue count every service type the utility reported (bundled, energy-only and delivery-only). The price column uses bundled service alone, because part-bill revenue would understate it. Sources of energy: 5.5 TWh in total, of which 0% was its own net generation and 5.5 TWh was bought wholesale; summer peak demand 1,643 MW.
Reliability
Minutes of sustained interruption per customer in 2024, as the utility reported them under IEEE 1366 standard. SAIFI: 3.37 interruptions per customer with major event days, 1.83 without; CAIDI 561.9 minutes per interruption. EIA's Maine total across all reporting utilities was 1,748.6 minutes with major event days and 274.0 without. Major event days are storms and similar events that a utility's chosen method sets apart; methods differ, so treat comparisons as approximate. What SAIDI and SAIFI mean.
| Year | SAIDI, all events | SAIDI, no major events | SAIFI, all events | SAIFI, no major events | Method |
|---|---|---|---|---|---|
| 2025 early release | 318.3 | 177.0 | 2.11 | 1.74 | IEEE 1366 |
| 2024 | 1,893.5 | 215.4 | 3.37 | 1.83 | IEEE 1366 |
| 2023 | 1,656.5 | 190.3 | 3.01 | 1.82 | IEEE 1366 |
| 2022 | 856.4 | 172.5 | 2.77 | 1.71 | IEEE 1366 |
| 2021 | 327.0 | 219.6 | 2.48 | 2.04 | IEEE 1366 |
| 2020 | 1,774.8 | 220.8 | 3.74 | 2.04 | IEEE 1366 |
| 2019 | 856.0 | 189.8 | 2.37 | 1.53 | IEEE 1366 |
| 2018 | 633.3 | 235.8 | 2.64 | 1.85 | IEEE 1366 |
| 2017 | 2,693.3 | 202.2 | 2.73 | 1.81 | IEEE 1366 |
| 2016 | 404.4 | 198.6 | 2.20 | 1.76 | IEEE 1366 |
| 2015 | 171.6 | 171.6 | 1.57 | 1.57 | IEEE 1366 |
| 2014 | 745.8 | 197.4 | 5.31 | 1.80 | IEEE 1366 |
| 2013 | 715.8 | 218.4 | 2.47 | 1.74 | IEEE 1366 |
Counties in its service territory
- Androscoggin County
- Cumberland County
- Franklin County
- Hancock County
- Kennebec County
- Knox County
- Lincoln County
- Oxford County
- Penobscot County
- Piscataquis County
- Sagadahoc County
- Somerset County
- Waldo County
- York County
Counties the utility listed on Form EIA-861 for 2024. Listing a county does not mean the utility serves all of it.
Other utilities in Maine
| Utility | Ownership | Residential customers | ¢ per kWh | Monthly bill | SAIDI, all events | SAIDI, no major events |
|---|---|---|---|---|---|---|
| Versant Power | Investor-owned | 137,906 | 28.08¢ | $141.76 | 1,206.0 | 478.0 |
| Eastern Maine Electric Coop | Cooperative | 10,803 | 17.06¢ | $85.86 | 1,084.6 | 737.2 |
| Houlton Water Company | Municipal | 3,907 | 11.95¢ | $87.95 | — | — |
| Town of Madison | Municipal | 2,413 | 15.16¢ | $101.84 | — | — |
| Electricity Maine, LLC energy only | Retail power marketer | 17,749 | — | — | — | — |
| FairPoint Energy LLC energy only | Retail power marketer | 5,637 | — | — | — | — |
| XOOM Energy Maine, LLC energy only | Retail power marketer | 5,370 | — | — | — | — |
| C. N. Brown Electricity, LLC energy only | Retail power marketer | 4,843 | — | — | — | — |
All Maine utilities · Investor-owned utilities nationwide
Questions and answers
How much does electricity cost from Central Maine Power Co?
Residential customers paid an average of 23.43¢ per kilowatthour in 2024. EIA derives this by dividing residential revenue by residential sales; it is an average across all rate schedules and charges, not a tariff rate.
How does that compare with Maine?
The Maine average residential price in 2024 was 24.29¢ and the US average 16.48¢; Central Maine Power Co was 3.5% below the state figure. Among 5 utility filings with a bundled residential price in Maine, it had the 2nd highest.
What is the average Central Maine Power Co bill?
$130.57 a month in 2024, on average residential use of 557 kWh a month (annual revenue and sales divided by customers and by twelve). The Maine average was $133.60 on 550 kWh.
How reliable is Central Maine Power Co service?
It reported 1,893.5 minutes of interruption per customer (SAIDI) including major event days and 215.4 minutes excluding them, with 3.37 interruptions per customer (SAIFI) in 2024. Utilities calculate these under differing methods, so comparisons are approximate.
Is the Central Maine Power Co price rising?
The average residential price was down 14.6% in 2024 compared with 2023 and up 35.3% compared with 2019. EIA's early, not fully edited release for 2025 shows 27.41¢.
Which counties does Central Maine Power Co serve?
Its Form EIA-861 service territory lists 14 counties, including Androscoggin County, ME, Cumberland County, ME, Franklin County, ME, Hancock County, ME, Kennebec County, ME and Knox County, ME. A county can appear in several utilities' territories.
Provenance
Source: U.S. Energy Information Administration. Annual figures are from Form EIA-861 (sales to ultimate customers, reliability, operational data and service territory files), final release for 2024, respondent "Central Maine Power Co", utility number 3266; the 2025 row is from EIA's early release. Monthly utility figures are from the Form EIA-861M sample. State and US averages are from the Form EIA-861M sales and revenue workbook, published through July 2026. All are US government works in the public domain. Page built 30 Sep 2026. Errors in processing are corrected at the next build; see corrections. For tariffs and rate schedules, consult the utility or the state utility commission.