Cooperative · Georgia · EIA 18305
Sumter Electric Member Corp
Cooperative · Georgia · 21K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 352 minutes/customer.
Reliability verdict
Sumter Electric Member Corp shows near-benchmark chronic reliability in 2023: 148 minutes SAIDI excluding major events (352 minutes including them) across 21K customers.
- 352 min
- SAIDI 2023
- 148 min
- SAIDI ex-MED
- 21K
- Customers
Chronic reliability judged on SAIDI excluding major event days when reported (IEEE 1366). Source: EIA Form 861 · August 2026.
Signature read: long interruption minutes vs the 911 utility cohort (>258 min tercile cut).
What long-outage Sumter Electric Member Corp filings show
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.
Based on this utility's own EIA Form 861 reliability record -- baseline (major-event- excluded) outage duration, total outage duration, and outage frequency -- each benchmarked against every reporting utility nationwide. Not a measure of electricity rates or customer service, which this portal does not track.
352 outage minutes per customer annually
Annual minutes without electric service (2023)
SAIDI by year (2021-2023)
Minutes per customer-year · EIA Form 861
Year-by-year SAIDI for Sumter Electric Member Corp from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.
Sumter Electric Member Corp SAIDI trend
Sumter Electric Member Corp vs the nationwide SAIDI distribution
Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure
352 Around the middle fewer outage minutes than 26% of 911 utilities
Utilities nationwide, banded by latest reported SAIDI (minutes)
Each bar is a band; taller bars hold more utilities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source U.S. EIA Form 861 reliability filings · August 2026
Price vs. reliability
Where Sumter Electric Member Corp sits on price vs. reliability
Among the 781 U.S. utilities large enough to report both revenue per customer and a recent outage record, Sumter Electric Member Corp charges more per customer than 43% of them, and is more reliable (lower SAIDI) than 29% of them, placing it in the quadrant where it pays less and is less reliable. Revenue per customer and outage minutes are independent figures: paying more does not guarantee fewer outages.
Revenue per customer: $2,412/year · Latest SAIDI: 351.6 minutes/year.
SAIDI 2023 breakdown: 351.6 minutes
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.
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
Utilities with similar EIA profiles
Two cross-state peer sets for Sumter Electric Member Corp. Same-state SAIDI neighbors stay in Read-with below; these neighborhoods are nearest other-state utilities with at least 10,000 reported customers.
Similar customer count
Nearest utilities by Form 861 customers (21K here), outside Georgia.
Similar chronic SAIDI
Nearest utilities by latest SAIDI minutes (351.6 here), outside Georgia, excluding the customer-peer set.
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 · methodology.