County annual report · FIPS 47063
2025 Hamblen County, TN Power Outage Report
In 2025, customers in Hamblen County, TN went without power for an average of 0.7 hours, a total of 27K customer-hours (Tennessee average 4.3 hours). That ranks 66th worst of 81 Tennessee counties and 2831st 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 Hamblen 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 | June 5, 2025 20:30 | June 5, 2025 20:45 | 15m | 2,135 | 534 |
| 2 | September 4, 2025 12:30 | September 8, 2025 12:30 | 4d | 2,134 | 3,280 |
| 3 | December 3, 2025 14:00 | December 3, 2025 19:15 | 5h 15m | 1,259 | 335 |
| 4 | December 17, 2025 19:00 | December 17, 2025 21:45 | 2h 45m | 1,254 | 316 |
| 5 | June 30, 2025 13:15 | June 30, 2025 17:00 | 3h 45m | 1,250 | 635 |
| 6 | July 7, 2025 12:45 | July 7, 2025 15:45 | 3h | 1,250 | 322 |
| 7 | August 11, 2025 12:30 | August 15, 2025 21:00 | 4d 8h | 1,167 | 766 |
| 8 | February 17, 2025 18:45 | March 7, 2025 12:15 | 17d 17h | 734 | 1,877 |
| 9 | June 8, 2025 18:30 | June 8, 2025 21:00 | 2h 30m | 556 | 483 |
| 10 | December 19, 2025 05:00 | December 19, 2025 09:30 | 4h 30m | 471 | 696 |
Outage episodes by size in 2025: 25 reached 100+ customers, 7 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 Hamblen 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 |
|---|---|---|---|---|---|
| Appalachian Electric Coop | 2024 | 15.5 hrs | 3.67 | 4.9 hrs | 2.86 |
| Holston Electric Coop, Inc | 2024 | 14.9 hrs | 3.45 | 3.3 hrs | 2.31 |
| City of Morristown - (TN) | 2024 | 4.0 hrs | 2.45 | 69 min | 1.16 |
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 ÷ 38,657 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. Hamblen County has data for 2016–2025.
Cite this report
MassOutage (massoutage.com), Hamblen 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/hamblen-county