SAIDI
145 min per year
Average outage minutes (2023)
City of Morristown - (TN) is a municipally-owned utility operating in Tennessee under EIA identifier 12988. It reports service to approximately 16,321 customer accounts and generated about $0.08 billion in annual electric revenue, with a service footprint spanning 4 ZIP codes. 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 City of Morristown - (TN) customer experienced 145.2 minutes of power interruptions — a metric called SAIDI (System Average Interruption Duration Index). That sits within the 120–180 minute national benchmark range, indicating performance typical of U.S. distribution utilities. SAIFI — the average number of outage events per customer — was 2.00 for the same period, so customers statistically faced roughly 2 distinct interruptions that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 56.1 minutes — the gap between that figure and the headline 145.2 reveals how much weather, not day-to-day infrastructure, drove outages.
The EIA dataset includes 4 years of continuous reporting (2020–2023) for City of Morristown - (TN), which lets you see whether reliability is trending up or down rather than judging from a single snapshot. SAIDI has improved from 184.5 to 145.2 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, with service territory ZIPs sourced from OpenEI — you can cross-reference them with your own utility bill or use them when comparing providers before relocating.
SAIDI
145 min per year
Average outage minutes (2023)
SAIFI
2.00 interruptions/yr
Outage frequency (2023)
Customers
16,321
Served in Tennessee
145 minutes per customer per year
Minutes without power per year (2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 184.5 | 43.0 | 2.270 | 14,382 |
| 2021 | 101.8 | 51.1 | 1.597 | 14,382 |
| 2022 | 146.3 | 69.6 | 1.480 | 15,387 |
| 2023 | 145.2 | 56.1 | 2.000 | 16,321 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
City of Morristown - (TN) serves 4 ZIP codes in Tennessee.
City of Morristown - (TN) had a SAIDI of 145.2 minutes in 2023, meaning the average customer experienced about 145 minutes of outages that year. This is near the national average.
City of Morristown - (TN) is classified as a Municipal serving Tennessee. 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 City of Morristown - (TN) experiences power outages. A lower SAIDI indicates better reliability. The national average is roughly 120-180 minutes per year, so comparing City of Morristown - (TN)'s SAIDI to that benchmark shows whether this utility is above or below average.
City of Morristown - (TN) serves approximately 16,321 customers in Tennessee. Customer count can affect reliability metrics because larger utilities may face different infrastructure challenges compared to smaller ones.
City of Morristown - (TN) 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.