SAIDI
3 min per year
Average outage minutes (2023)
Town of Sterling - (MA) is a municipally-owned utility operating in Massachusetts under EIA identifier 18087. It reports service to approximately 4,077 customer accounts and generated about $0.01 billion in annual electric revenue. As a municipal utility, it is typically governed by a local board or city council and is exempt from federal income tax.
In 2023, the average Town of Sterling - (MA) customer experienced 3.2 minutes of power interruptions — a metric called SAIDI (System Average Interruption Duration Index). That places this utility well below the 120–180 minute national benchmark, signaling strong grid hardening and fast restoration practices. SAIFI — the average number of outage events per customer — was 0.06 for the same period, so customers statistically faced roughly 0 distinct interruptions that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 3.2 minutes — the gap between that figure and the headline 3.2 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 Sterling - (MA), which lets you see whether reliability is trending up or down rather than judging from a single snapshot. SAIDI has improved from 54.2 to 3.2 minutes over that window — a meaningful direction for prospective customers and regulators watching capital investment outcomes. All figures on this page come directly from EIA Form 861, the federal annual electric power industry survey — you can cross-reference them with your own utility bill or use them when comparing providers before relocating.
SAIDI
3 min per year
Average outage minutes (2023)
SAIFI
0.06 interruptions/yr
Outage frequency (2023)
Customers
4,077
Served in Massachusetts
3 minutes per customer per year
Minutes without power per year (2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 54.2 | 8.7 | 1.250 | — |
| 2021 | 53.3 | 12.1 | 0.640 | — |
| 2022 | 47.8 | 12.8 | 0.720 | — |
| 2023 | 3.2 | 3.2 | 0.060 | — |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Town of Sterling - (MA) had a SAIDI of 3.2 minutes in 2023, meaning the average customer experienced about 3 minutes of outages that year. This is below the national average, indicating above-average reliability.
Town of Sterling - (MA) is classified as a Municipal serving Massachusetts. Municipal utilities are owned and operated by local governments.
SAIDI (System Average Interruption Duration Index) measures the average total minutes per year that a customer of Town of Sterling - (MA) experiences power outages. A lower SAIDI indicates better reliability. The national average is roughly 120-180 minutes per year, so comparing Town of Sterling - (MA)'s SAIDI to that benchmark shows whether this utility is above or below average.
Town of Sterling - (MA) serves approximately 4,077 customers in Massachusetts. Customer count can affect reliability metrics because larger utilities may face different infrastructure challenges compared to smaller ones.
Town of Sterling - (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.
SAIDI "without major event days" (SAIDI nMED) excludes outages caused by hurricanes, ice storms, and other catastrophic weather events. It better reflects day-to-day infrastructure reliability rather than vulnerability to extreme weather. Both standard SAIDI and SAIDI nMED are shown in the reliability trend table above.
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the U.S. Energy Information Administration (EIA) Form 861. Consult a qualified professional before making decisions based on this data.
Read our methodology — how this data is sourced, computed, and verified.