Power outages in Tennessee
In 2025, the average Tennessee customer was without power for 229.9 minutes (3.8 hours) over the year. That is below the US median of 258.7 minutes (4.3 hours) across 50 states compared.
Trend
Yearly outage time has swung widely since 2020, from 588.0 minutes (9.8 hours) down to 302.7, up to a peak, then down again. The worst year was 2023 at 14.3 hours, and 2024 and 2025 were both much lower.
Utilities in 2025
In 2025, Nashville Electric Service reported the lowest SAIDI at 0.0 minutes, followed by Meriwether Lewis Electric Coop at 9.0 minutes. The highest was City of LaFollette at 791.0 minutes (13.2 hours).
| Utility | Customers | Hours / yr | Interruptions |
|---|---|---|---|
| City of LaFollette | 23,287 | 13.2 | 5.1 |
| Pickwick Electric Coop | 21,506 | 9.7 | — |
| City of Rockwood - (TN) | 15,415 | 9.6 | 3.5 |
| Bolivar Energy Authority | 11,441 | 9.4 | 2.4 |
| Fort Loudoun Electric Coop | 36,120 | 8.8 | 2.8 |
| Tri-County Elec Member Corp (TN) | 26,277 | 8.8 | 3.9 |
| City of Paris - (TN) | 22,934 | 8.1 | 5.1 |
| Forked Deer Electric Coop, Inc | 10,094 | 7.8 | 3.3 |
| City of Pulaski - (TN) | 15,329 | 7.4 | 3.8 |
| City of Dickson | 39,833 | 6.5 | 2.5 |
| Sevier County Electric System | 63,888 | 6.3 | 2.6 |
| City of Memphis - (TN) | 430,114 | 5.8 | 2.2 |
| Caney Fork Electric Coop, Inc | 36,495 | 5.4 | 2.7 |
| Sequachee Valley Electric Coop | 39,977 | 5.1 | 2.1 |
| Appalachian Electric Coop | 51,976 | 5.0 | 3.2 |
| Knoxville Utilities Board | 225,030 | 4.6 | 1.3 |
| City of Greeneville - (TN) | 40,975 | 4.0 | 1.9 |
| City of Fayetteville | 19,745 | 3.8 | 3.0 |
| Cumberland Elec Member Corp | 113,563 | 3.7 | 2.7 |
| Duck River Elec Member Corp | 86,690 | 3.2 | 2.1 |
| City of Jackson - (TN) | 39,029 | 3.1 | 1.5 |
| Holston Electric Coop, Inc | 32,726 | 3.1 | 2.5 |
| Kingsport Power Co | 49,690 | 3.0 | 1.1 |
| Powell Valley Electric Coop | 26,578 | 3.0 | 4.6 |
| City of Clinton - (TN) | 31,429 | 2.6 | 2.0 |
What this means for backup power
For everyday outages, enter 2.4 hours in the calculator, which is the average length of one interruption. To ride out a year like 2023, size for 14.3 hours, which is all of that year's outage time added together.
FAQ
What does SAIDI mean?
SAIDI is the total time the average customer spends without power in a year. It is not the length of one outage. Tennessee's 2025 figure was 229.9 minutes, or 3.8 hours.
How long does a typical outage last in Tennessee?
One interruption lasts about 2.4 hours on average. For everyday backup planning, use that number in the calculator.
How many outages should I expect in a year?
In 2025, the average Tennessee customer had 1.6 interruptions. For a harsher year like 2023, plan for 14.3 total outage hours.
Utility pages
Source: U.S. EIA Form 861 Reliability file. Data snapshot 2026-11-05.