SAIDI
326 min per year
Average outage minutes (2023)
What This Utility Data Tells You
Oncor Electric Delivery Company LLC is a investor-owned utility operating in Texas under EIA identifier 44372. Customer count is not reported in the current EIA filing. As an investor-owned utility, it operates under state public utility commission oversight that reviews rate cases and reliability performance.
In 2023, the average Oncor Electric Delivery Company LLC customer experienced 325.5 minutes of power interruptions — a metric called SAIDI (System Average Interruption Duration Index). That is substantially above the 120–180 minute national benchmark, indicating either storm-prone geography, aging infrastructure, or extended restoration windows. SAIFI — the average number of outage events per customer — was 1.52 for the same period, so customers statistically faced roughly 2 distinct interruptions that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 62.4 minutes — the gap between that figure and the headline 325.5 reveals how much weather, not day-to-day infrastructure, drove outages.
The EIA dataset includes 4 years of continuous reporting (2020–2023) for Oncor Electric Delivery Company LLC, which lets you see whether reliability is trending up or down rather than judging from a single snapshot. SAIDI has improved from 487.7 to 325.5 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.
SAIFI
1.52 interruptions/yr
Outage frequency (2023)
Customers
N/A
Served in Texas
SAIDI vs. National Average (180 min) 81.4%
326 minutes per customer per year
Minutes without power per year (2023)
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 487.7 | 241.8 | 3.620 | — |
| 2021 | 558.8 | 68.8 | 2.030 | — |
| 2022 | 231.9 | 67.5 | 1.620 | — |
| 2023 | 325.5 | 62.4 | 1.520 | — |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Frequently Asked Questions
How reliable is Oncor Electric Delivery Company LLC?
Oncor Electric Delivery Company LLC had a SAIDI of 325.5 minutes in 2023, meaning the average customer experienced about 326 minutes of outages that year. This is above the national average, indicating below-average reliability.
What type of utility is Oncor Electric Delivery Company LLC?
Oncor Electric Delivery Company LLC is classified as a IOU serving Texas. Investor-owned utilities (IOUs) are for-profit companies regulated by state public utility commissions.
What does SAIDI mean for Oncor Electric Delivery Company LLC?
SAIDI (System Average Interruption Duration Index) measures the average total minutes per year that a customer of Oncor Electric Delivery Company LLC experiences power outages. A lower SAIDI indicates better reliability. The national average is roughly 120-180 minutes per year, so comparing Oncor Electric Delivery Company LLC's SAIDI to that benchmark shows whether this utility is above or below average.
How many customers does Oncor Electric Delivery Company LLC serve?
Oncor Electric Delivery Company LLC serves customers in Texas. Exact customer count data is not available in the current EIA filing.
How has Oncor Electric Delivery Company LLC's reliability changed over time?
Oncor Electric Delivery Company LLC 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.
What is SAIDI without major event days?
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.
Utility Profile
- Type
- IOU
- State
- Texas
- Customers
- —
- EIA ID
- 44372
Related Data
Guides
Data Source: U.S. Energy Information Administration Form 861 annual electric power industry survey. ZIP service territory from OpenEI.
Related
Data sourced from official EIA reliability statistics and OpenEI utility rate database. See our methodology for details. Retrieved and formatted by PlainUtility Editorial
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.