SAIDI
354 min per year
Mean outage duration per year (2023)
Weakley County Mun Elec Sys is a municipally-owned utility operating in Tennessee under EIA identifier 20228. It reports service to approximately 20,751 customer accounts and generated about $0.05 billion in annual electric revenue, with a service footprint spanning 22 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 Weakley County Mun Elec Sys customer experienced 354.4 minutes of power interruptions, the industry-standard SAIDI metric (System Average Interruption Duration Index). Excluding major weather events from that total, that falls inside the typical 120–180 minute national benchmark, in line with what most U.S. distribution utilities report. The SAIFI figure, which tracks average outage events per customer, came in at 13.40 for the same period, meaning customers statistically saw about 13 distinct interruptions that year. Once major event days (hurricanes, ice storms) are excluded, SAIDI comes down to 176.4 minutes, and the spread against the headline 354.4 indicates how much weather, versus routine infrastructure, drove the outage total.
With 4 consecutive years of EIA data (2020–2023), Weakley County Mun Elec Sys's reliability record can be judged on trend rather than one isolated year. SAIDI has increased from 161.0 to 354.4 minutes, which may reflect either worsening weather exposure or delayed grid modernization.
SAIDI
354 min per year
Mean outage duration per year (2023)
SAIFI
13.40 interruptions/yr
Outage frequency (2023)
Customers
20,751
Tennessee service territory
354 minutes per customer per year
Minutes without power per year (2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 161.0 | 161.0 | 2.000 | 20,534 |
| 2021 | 215.7 | 215.4 | 8.309 | 20,534 |
| 2022 | 149.0 | 79.5 | 10.534 | 20,717 |
| 2023 | 354.4 | 176.4 | 13.400 | - |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Weakley County Mun Elec Sys serves 22 ZIP codes in Tennessee.
Weakley County Mun Elec Sys had a SAIDI of 354.4 minutes in 2023 including major weather events, but 176.4 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 sits close to the national average.
Weakley County Mun Elec Sys is classified as a Municipal serving Tennessee.
Weakley County Mun Elec Sys serves approximately 20,751 customers in Tennessee.
Weakley County Mun Elec Sys 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.