County annual report · FIPS 47155
2025 Sevier County, TN Power Outage Report
In 2025, customers in Sevier County, TN went without power for an average of 5.5 hours, a total of 389K customer-hours (Tennessee average 4.3 hours). That ranks 29th worst of 81 Tennessee counties and 1397th 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 Sevier 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 | February 16, 2025 03:45 | March 20, 2025 01:00 | 31d 21h | 7,825 | 183K |
| 2 | May 3, 2025 22:30 | May 4, 2025 23:45 | 1d 1h | 6,386 | 7,501 |
| 3 | February 2, 2025 18:30 | February 2, 2025 21:00 | 2h 30m | 5,389 | 8,083 |
| 4 | June 28, 2025 11:45 | June 30, 2025 03:45 | 1d 16h | 3,598 | 6,373 |
| 5 | October 1, 2025 18:45 | October 2, 2025 00:15 | 5h 30m | 3,477 | 1,685 |
| 6 | August 3, 2025 12:45 | August 3, 2025 15:45 | 3h | 3,100 | 2,352 |
| 7 | September 4, 2025 12:15 | September 6, 2025 00:15 | 1d 12h | 3,000 | 9,067 |
| 8 | December 18, 2025 20:30 | December 20, 2025 19:30 | 1d 23h | 2,802 | 18K |
| 9 | June 1, 2025 21:00 | June 2, 2025 00:15 | 3h 15m | 2,734 | 3,976 |
| 10 | August 15, 2025 01:15 | August 15, 2025 08:15 | 7h | 2,578 | 4,167 |
Outage episodes by size in 2025: 139 reached 100+ customers, 27 reached 1,000+ customers, 0 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 Sevier 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 |
| Appalachian Electric Coop | 2024 | 15.5 hrs | 3.67 | 4.9 hrs | 2.86 |
| Sevier County Electric System | 2024 | 5.5 hrs | 2.42 | 3.8 hrs | 2.12 |
| City of Newport - (TN) | - | - | - | - | - |
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 ÷ 71,320 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. Sevier County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sevier 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/sevier-county