Massachusetts Electric Co

What This Utility Data Tells You

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.