County annual report · FIPS 47093
2025 Knox County, TN Power Outage Report
In 2025, customers in Knox County, TN went without power for an average of 3.9 hours, a total of 962K customer-hours (Tennessee average 4.3 hours). That ranks 43rd worst of 81 Tennessee counties and 1786th of 3,000 nationally.
Compared with TN, the US and 2024
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Knox County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 18, 2025 12:30 | December 21, 2025 02:45 | 2d 14h | 19,649 | 114K |
| 2 | May 17, 2025 03:45 | May 20, 2025 03:45 | 3d | 17,546 | 146K |
| 3 | September 3, 2025 11:45 | September 6, 2025 06:15 | 2d 18h | 12,212 | 61K |
| 4 | January 1, 2025 00:00 | February 19, 2025 02:30 | 49d 2h | 10,233 | 113K |
| 5 | April 8, 2025 02:15 | April 15, 2025 07:00 | 7d 4h | 6,943 | 14K |
| 6 | July 20, 2025 17:30 | July 22, 2025 23:45 | 2d 6h | 6,745 | 23K |
| 7 | July 30, 2025 01:45 | August 2, 2025 06:30 | 3d 4h | 5,646 | 22K |
| 8 | August 25, 2025 08:00 | August 26, 2025 04:15 | 20h 15m | 5,171 | 8,058 |
| 9 | May 20, 2025 08:00 | May 23, 2025 05:15 | 2d 21h | 4,928 | 31K |
| 10 | June 6, 2025 06:15 | June 7, 2025 23:15 | 1d 17h | 4,468 | 16K |
Outage episodes by size in 2025: 177 reached 100+ customers, 69 reached 1,000+ customers, 4 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Knox County reported on EIA Form 861 for 2025, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Knoxville Utilities Board | 2024 | 5.9 hrs | 1.86 | 3.2 hrs | 1.40 |
| City of Clinton - (TN) | 2024 | 4.4 hrs | 1.23 | 3.0 hrs | 1.02 |
| Fort Loudoun Electric Coop | 2024 | 7.9 hrs | 2.85 | 6.4 hrs | 2.60 |
| City of Lenoir - (TN) | 2021 | 2.6 hrs | 1.57 | 2.6 hrs | 1.57 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Tennessee's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 244,081 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Knox County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Knox County, TN annual power outage report, 2025, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2025/tennessee/knox-county