IOU · Massachusetts · EIA 11804
Massachusetts Electric Co
IOU · Massachusetts · 635K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 349 minutes/customer.
Reliability verdict
Massachusetts Electric Co shows above-average chronic reliability in 2023: 95 minutes SAIDI excluding major events (349 minutes including them) across 635K customers.
- 349 min
- SAIDI 2023
- 1.16
- SAIFI 2023
- 95 min
- SAIDI ex-MED
- 635K
- Customers
Chronic reliability judged on SAIDI excluding major event days when reported (IEEE 1366). Source: EIA Form 861 · August 2026.
Signature read: long interruption minutes vs the 911 utility cohort (>258 min tercile cut).
What long-outage Massachusetts Electric Co filings show
Massachusetts Electric Co is an investor-owned utility operating in Massachusetts under EIA identifier 11804. It reports service to approximately 635,003 customer accounts and generated about $1.50 billion in annual electric revenue, with a service footprint spanning 383 ZIP codes. Investor ownership puts this utility under the regulatory authority of the state public utility commission, which reviews its rate requests and reliability record.
In 2023, the average Massachusetts Electric Co customer experienced 349.4 minutes of power interruptions, a measure known as SAIDI, or System Average Interruption Duration Index. Excluding major weather events from that total, that keeps this utility below the typical 120–180 minute national benchmark, consistent with a well-hardened distribution system and fast restoration crews. SAIFI, the average number of outage events per customer, was 1.16 for the same period, so customers statistically faced roughly 1 distinct interruption that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 94.9 minutes, the gap between that figure and the headline 349.4 reveals how much weather, not day-to-day infrastructure, drove outages.
The EIA dataset includes 4 years of continuous reporting (2020–2023) for Massachusetts Electric Co, which lets you see whether reliability is trending up or down rather than judging from a single snapshot. Over that window, SAIDI moved from 452.2 down to 349.4 minutes, a trend worth noting for anyone weighing capital investment outcomes.
Based on this utility's own EIA Form 861 reliability record -- baseline (major-event- excluded) outage duration, total outage duration, and outage frequency -- each benchmarked against every reporting utility nationwide. Not a measure of electricity rates or customer service, which this portal does not track.
349 minutes per customer per year
Minutes without power per year (2023)
SAIDI by year (2020-2023)
Minutes per customer-year · EIA Form 861
Year-by-year SAIDI for Massachusetts Electric Co from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.
Massachusetts Electric Co SAIDI trend
Massachusetts Electric Co vs the nationwide SAIDI distribution
Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure
349 Around the middle fewer outage minutes than 26% of 911 utilities
Utilities nationwide, banded by latest reported SAIDI (minutes)
Each bar is a band; taller bars hold more utilities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source U.S. EIA Form 861 reliability filings · August 2026
Price vs. reliability
Where Massachusetts Electric Co sits on price vs. reliability
Among the 781 U.S. utilities large enough to report both revenue per customer and a recent outage record, Massachusetts Electric Co charges more per customer than 39% of them, and is more reliable (lower SAIDI) than 29% of them, placing it in the quadrant where it pays less and is less reliable. Revenue per customer and outage minutes are independent figures: paying more does not guarantee fewer outages.
Revenue per customer: $2,355/year · Latest SAIDI: 349.4 minutes/year.
SAIDI 2023 breakdown: 349.4 minutes
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 452.2 | 301.3 | 1.449 | - |
| 2021 | 471.5 | 97.6 | 1.260 | 1,320,238 |
| 2022 | 143.0 | 106.4 | 1.160 | 1,326,212 |
| 2023 | 349.4 | 94.9 | 1.162 | 1,331,051 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
Massachusetts Electric Co serves 383 ZIP codes in Massachusetts.
Frequently Asked Questions
How reliable is Massachusetts Electric Co?
Massachusetts Electric Co had a SAIDI of 349.4 minutes in 2023 including major weather events, but 94.9 minutes excluding them (the IEEE-standard day-to-day reliability measure, the difference points to a major storm that year rather than an ongoing problem). Excluding major weather events, this is below the national average, indicating above-average reliability.
What type of utility is Massachusetts Electric Co?
Massachusetts Electric Co is classified as a IOU serving Massachusetts.
How many customers does Massachusetts Electric Co serve?
Massachusetts Electric Co serves approximately 635,003 customers in Massachusetts.
How has Massachusetts Electric Co's reliability changed over time?
Massachusetts Electric Co has 4 years of reliability data (2020-2023). This utility's SAIDI has stayed fairly flat over the period. Review the trend table above for year-by-year detail.
Utility Profile
- Type
- IOU
- State
- Massachusetts
- Customers
- 635,003
- Annual Revenue
- $1.50B
- EIA ID
- 11804
Explore
Utilities with similar EIA profiles
Two cross-state peer sets for Massachusetts Electric Co. Same-state SAIDI neighbors stay in Read-with below; these neighborhoods are nearest other-state utilities with at least 10,000 reported customers.
Similar customer count
Nearest utilities by Form 861 customers (635K here), outside Massachusetts.
Similar chronic SAIDI
Nearest utilities by latest SAIDI minutes (349.4 here), outside Massachusetts, excluding the customer-peer set.
Source: U.S. Energy Information Administration Form 861 annual electric power industry survey · ZIP service territory: OpenEI. Disclaimer: informational only, not professional advice. See full disclaimer · methodology.