SAIDI
352 min per year
Average outage minutes (2023)
What This Utility Data Tells You
Sumter Electric Member Corp is a member-owned electric cooperative operating in Georgia under EIA identifier 18305. It reports service to approximately 21,154 customer accounts and generated about $0.05 billion in annual electric revenue, with a service footprint spanning 39 ZIP codes. Being member-owned, this cooperative answers to its ratepayers rather than outside shareholders, a structure that tends to influence how rate cases and capital spending get decided.
In 2023, the average Sumter Electric Member Corp customer experienced 351.6 minutes of power interruptions, the industry-standard SAIDI metric (System Average Interruption Duration Index). Excluding major weather events from that total, that sits within the 120–180 minute national benchmark range, indicating performance typical of U.S. distribution utilities. Excluding major event days (hurricanes, ice storms), SAIDI drops to 148.4 minutes, the gap between that figure and the headline 351.6 reveals how much weather, not day-to-day infrastructure, drove outages.
With 3 consecutive years of EIA data (2021–2023), Sumter Electric Member Corp's reliability record can be judged on trend rather than one isolated year. SAIDI climbed from 178.0 to 351.6 minutes over that window, a shift that can point to worsening weather exposure or delayed grid modernization.
SAIFI
N/A interruptions/yr
Outage frequency (2023)
Customers
21,154
Customers across Georgia
SAIDI vs. National Average (180 min) 87.9%
352 outage minutes per customer annually
Annual minutes without electric service (2023)
Reliability Trend (2021–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2021 | 178.0 | 178.0 | - | 20,500 |
| 2022 | 187.2 | 178.1 | - | 21,046 |
| 2023 | 351.6 | 148.4 | - | 21,154 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
Sumter Electric Member Corp serves 39 ZIP codes in Georgia.
310073109231709317113171931721317353174331763317643177231780317873179631801318033180531806318143181531820318213182431825318273182931832319033190531907398263984039842398543986239867398773988539886
Frequently Asked Questions
How reliable is Sumter Electric Member Corp?
Sumter Electric Member Corp had a SAIDI of 351.6 minutes in 2023 including major weather events, but 148.4 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.
What type of utility is Sumter Electric Member Corp?
Sumter Electric Member Corp is classified as a Cooperative serving Georgia.
How many customers does Sumter Electric Member Corp serve?
Sumter Electric Member Corp serves approximately 21,154 customers in Georgia.
How has Sumter Electric Member Corp's reliability changed over time?
Sumter Electric Member Corp has 3 years of reliability data (2021-2023). SAIDI has remained relatively stable over this period. Review the trend table above for year-by-year detail.
Utility Profile
- Type
- Cooperative
- State
- Georgia
- Customers
- 21,154
- Annual Revenue
- $0.05B
- EIA ID
- 18305
Explore
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.