States › Massachusetts › Norfolk County
Electric utilities serving Norfolk 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.
Norfolk County, Massachusetts, appears in the Form EIA-861 service territory of 6 utilities for 2024; NSTAR Electric Company, Massachusetts Electric Co and Town of Braintree are the largest by residential customers statewide.
Their average residential prices ran from 15.79¢ to 33.60¢ per kilowatthour, with a median of 17.67¢, 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.
Massachusetts Bay Trans Authority lists the county too but reported no residential sales in Massachusetts under its own name.
The median SAIDI they reported was 64.1 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 739,749. 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 Braintree | Municipal | 14,039 | 15.79¢ | $111.59 | 2.5 | 2.5 |
| City of Norwood | Municipal | 13,601 | 17.67¢ | $97.52 | 64.1 | 24.8 |
| Town of Wellesley | Municipal | 9,437 | 16.20¢ | $158.36 | 8.0 | — |
| Massachusetts Bay Trans Authority | Public power district | — | — | — | — | — |
Ordered by residential customers in Massachusetts. Short-form filers are small utilities that report only totals to EIA, so no residential price is available. 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 Norfolk County | Massachusetts | United States |
|---|---|---|---|
| Average residential price per kWh | 17.67¢ median | 29.35¢ | 16.48¢ |
| Average monthly residential bill | $137.02 median | $167.20 | $142.26 |
| SAIDI, all events (minutes) | 64.1 median | 53.8 median | 184.5 median |
| SAIDI, without major event days | 45.4 median | 35.5 median | 99.8 median |
| Utilities counted | 6 | 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 Norfolk County itself.
Population: 739,749 (U.S. Census Bureau, Vintage 2025 estimate). Statewide, residential sales came to 2,795 kWh per resident in 2024.
Other Massachusetts counties
- Essex County 10
- Franklin County 2
- Hampden County 7
- Hampshire County 4
- Middlesex County 11
- Nantucket County 1
- Plymouth County 5
- Suffolk County 3
- Worcester County 11
All 14 counties and every Massachusetts utility
Questions and answers
Who provides electricity in Norfolk County?
NSTAR Electric Company, Massachusetts Electric Co, Town of Braintree, City of Norwood, Town of Wellesley and Massachusetts Bay Trans Authority 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 Norfolk County?
EIA has no county-level prices. The utilities serving the county reported average residential prices of 15.79¢ to 33.60¢ per kilowatthour across their Massachusetts customers in 2024; the state average was 29.35¢.
How reliable is power in Norfolk County?
Reliability is reported per utility, not per county. The utilities listed reported a median of 64.1 minutes of interruption per customer in 2024 including major event days and 45.4 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.