SAIDI
53 min per year
Yearly outage minutes, on average (2023)
Town of Mansfield - (MA) is a municipally-owned utility operating in Massachusetts under EIA identifier 11586. It reports service to approximately 10,553 customer accounts and generated about $0.04 billion in annual electric revenue, with a service footprint spanning 8 ZIP codes. Municipal ownership means a local board or city council typically oversees this utility, and it is exempt from federal income tax.
In 2023, the average Town of Mansfield - (MA) customer experienced 52.9 minutes of power interruptions, the industry-standard SAIDI metric (System Average Interruption Duration Index). Excluding major weather events from that total, that is comfortably under the 120–180 minute national benchmark range, a sign of solid grid resilience and quick outage response. Over the same period, SAIFI (outage events per customer) was 0.53, putting the typical customer at roughly 1 distinct interruption that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 9.7 minutes, the gap between that figure and the headline 52.9 reveals how much weather, not day-to-day infrastructure, drove outages.
The EIA dataset includes 4 years of continuous reporting (2020–2023) for Town of Mansfield - (MA), which lets you see whether reliability is trending up or down rather than judging from a single snapshot. SAIDI has increased from 8.7 to 52.9 minutes, which may reflect either worsening weather exposure or delayed grid modernization.
SAIDI
53 min per year
Yearly outage minutes, on average (2023)
SAIFI
0.53 interruptions/yr
Outage frequency (2023)
Customers
10,553
Served in Massachusetts
53 outage minutes per customer annually
Minutes without power per year (2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 8.7 | 4.6 | 0.071 | 9,950 |
| 2021 | 2.4 | 2.4 | 0.031 | 9,750 |
| 2022 | 33.9 | 5.3 | 0.391 | 10,400 |
| 2023 | 52.9 | 9.7 | 0.525 | 10,504 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Town of Mansfield - (MA) serves 8 ZIP codes in Massachusetts.
Town of Mansfield - (MA) had a SAIDI of 52.9 minutes in 2023 including major weather events, but 9.7 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). Leaving aside major weather events, that figure comes in under the national average, pointing to above-average reliability.
Town of Mansfield - (MA) is classified as a Municipal serving Massachusetts.
Town of Mansfield - (MA) serves approximately 10,553 customers in Massachusetts.
Town of Mansfield - (MA) has 4 years of reliability data (2020-2023). SAIDI has remained relatively stable over this period. Review the trend table above for year-by-year detail.
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.
Every figure on PlainUtility is rendered directly from the U.S. Energy Information Administration's Form 861 reliability data, no number is typed in by an editor. This utility's SAIDI/SAIFI figures are rendered directly from EIA Form 861 reliability files. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2020-2023.