States › Massachusetts › Plymouth County
Electric utilities serving Plymouth County, Massachusetts
Utilities that list the county in their Form EIA-861 service territory for 2024, with each one's average price, bill and outage minutes.
5 utilities list Plymouth County, Massachusetts, in the service territory they reported to EIA for 2024, the largest by residential customers statewide being NSTAR Electric Company, Massachusetts Electric Co and Town of Middleborough.
Their average residential prices ran from 15.84¢ to 33.60¢ per kilowatthour, with a median of 29.91¢, against a Massachusetts average of 29.35¢ and a US average of 16.48¢. Each price is the utility's figure for all of its Massachusetts customers, not for this county alone.
The median SAIDI they reported was 80.6 minutes per customer including major event days; the median among all Massachusetts utilities reporting was 53.8.
The Census Bureau estimates the county's population at 546,829. EIA does not publish customers by county, so which utility serves a given address has to be confirmed with the utility or the state utility commission.
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. Figures are for each utility's whole Massachusetts operation; EIA publishes nothing at county level.
Utilities and their 2024 figures
| Utility | Ownership | Residential customers | ¢ per kWh | Monthly bill | SAIDI, all events | SAIDI, no major events |
|---|---|---|---|---|---|---|
| NSTAR Electric Company mostly delivery | Investor-owned | 1,303,076 | 29.91¢ | $137.02 | 80.6 | 66.1 |
| Massachusetts Electric Co mostly delivery | Investor-owned | 1,210,113 | 33.60¢ | $165.44 | 133.7 | 90.7 |
| Town of Middleborough | Municipal | 14,884 | 15.84¢ | $125.38 | 19.1 | 19.1 |
| City of Hingham short form | Municipal | 10,175 | — | — | — | — |
| Hull Municipal Light Plant short form | Municipal | 6,193 | — | — | — | — |
Ordered by residential customers in Massachusetts. Short-form filers are small utilities that report only totals to EIA, so no residential price is available; their all-sector revenue per kWh was City of Hingham 16.95¢, Hull Municipal Light Plant 18.97¢. A utility with no customers shown reported its retail sales elsewhere or delivers power that other companies bill for.
Against the state and the country
| Measure, 2024 | Utilities listing Plymouth County | Massachusetts | United States |
|---|---|---|---|
| Average residential price per kWh | 29.91¢ median | 29.35¢ | 16.48¢ |
| Average monthly residential bill | $137.02 median | $167.20 | $142.26 |
| SAIDI, all events (minutes) | 80.6 median | 53.8 median | 184.5 median |
| SAIDI, without major event days | 66.1 median | 35.5 median | 99.8 median |
| Utilities counted | 5 | 56 | 1,413 |
Outage minutes reported
SAIDI for 2024 across each utility's whole system, including major event days (paler bars: only the figure without major event days was reported). Not a measure of outages in Plymouth County itself.
Population: 546,829 (U.S. Census Bureau, Vintage 2025 estimate). Statewide, residential sales came to 2,795 kWh per resident in 2024.
Other Massachusetts counties
- Franklin County 2
- Hampden County 7
- Hampshire County 4
- Middlesex County 11
- Nantucket County 1
- Norfolk County 6
- Suffolk County 3
- Worcester County 11
All 14 counties and every Massachusetts utility
Questions and answers
Who provides electricity in Plymouth County?
NSTAR Electric Company, Massachusetts Electric Co, Town of Middleborough, City of Hingham and Hull Municipal Light Plant list the county in their Form EIA-861 service territory for 2024. Territories overlap, and a utility may cover only a corner of the county.
What is the electricity price in Plymouth County?
EIA has no county-level prices. The utilities serving the county reported average residential prices of 15.84¢ to 33.60¢ per kilowatthour across their Massachusetts customers in 2024; the state average was 29.35¢.
How reliable is power in Plymouth County?
Reliability is reported per utility, not per county. The utilities listed reported a median of 80.6 minutes of interruption per customer in 2024 including major event days and 66.1 minutes excluding them.
Provenance
Source: U.S. Energy Information Administration, Form EIA-861 for 2024, final release: service territory file (counties by utility), sales to ultimate customers, reliability and short form files. State and US averages: Form EIA-861M workbook. Population: U.S. Census Bureau. Public domain. To confirm the utility at an address, ask the utility or the state utility commission.