County annual report · FIPS 47163
2024 Sullivan County, TN Power Outage Report
In 2024, customers in Sullivan County, TN went without power for an average of 13.6 hours, a total of 941K customer-hours (Tennessee average 4.8 hours). That ranks 9th worst of 84 Tennessee counties and 717th of 2,990 nationally.
Compared with TN, the US and 2023
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Sullivan County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 23, 2024 12:45 | October 5, 2024 00:45 | 11d 12h | 21,584 | 779K |
| 2 | February 13, 2024 03:15 | February 13, 2024 22:15 | 19h | 6,335 | 13K |
| 3 | January 12, 2024 14:00 | January 15, 2024 00:30 | 2d 10h | 2,912 | 12K |
| 4 | July 16, 2024 12:45 | July 16, 2024 16:30 | 3h 45m | 2,049 | 3,970 |
| 5 | May 10, 2024 09:15 | May 11, 2024 11:30 | 1d 2h | 1,390 | 2,245 |
| 6 | December 10, 2024 14:00 | December 12, 2024 23:15 | 2d 9h | 1,249 | 4,554 |
| 7 | April 17, 2024 11:30 | April 17, 2024 19:30 | 8h | 1,183 | 4,027 |
| 8 | July 29, 2024 10:00 | July 30, 2024 10:00 | 1d | 1,123 | 8,908 |
| 9 | October 29, 2024 11:30 | October 30, 2024 16:45 | 1d 5h | 1,104 | 5,532 |
| 10 | August 31, 2024 22:00 | September 1, 2024 19:00 | 21h | 1,081 | 1,660 |
Outage episodes by size in 2024: 99 reached 100+ customers, 11 reached 1,000+ customers, 1 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 Sullivan County reported on EIA Form 861 for 2024, 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 Power Co | 2024 | 29.5 hrs | 2.79 | 7.7 hrs | 2.07 |
| Johnson City - (TN) | 2024 | 11.0 hrs | 2.20 | 2.5 hrs | 1.24 |
| Kingsport Power Co | 2024 | 17.1 hrs | 1.80 | 2.7 hrs | 1.19 |
| City of Bristol - (TN) | 2024 | 9.1 hrs | 2.78 | 86 min | 1.57 |
| City of Elizabethton - (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 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 69,352 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. Sullivan County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sullivan County, TN annual power outage report, 2024, 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/2024/tennessee/sullivan-county