County annual report · FIPS 47163
2023 Sullivan County, TN Power Outage Report
In 2023, customers in Sullivan County, TN went without power for an average of 6.6 hours, a total of 458K customer-hours (Tennessee average 11.1 hours). That ranks 33rd worst of 83 Tennessee counties and 1198th of 2,977 nationally.
Compared with TN, the US and 2022
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Sullivan County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 3, 2023 14:30 | January 5, 2023 01:00 | 1d 10h | 15,053 | 75K |
| 2 | July 29, 2023 00:15 | August 1, 2023 22:15 | 3d 22h | 12,565 | 176K |
| 3 | March 3, 2023 09:30 | March 6, 2023 03:30 | 2d 18h | 2,980 | 25K |
| 4 | April 1, 2023 17:15 | April 3, 2023 23:15 | 2d 6h | 2,925 | 27K |
| 5 | November 7, 2023 14:15 | November 7, 2023 18:15 | 4h | 2,329 | 629 |
| 6 | April 21, 2023 14:45 | April 21, 2023 22:00 | 7h 15m | 2,080 | 6,285 |
| 7 | June 19, 2023 03:15 | June 19, 2023 16:30 | 13h 15m | 1,860 | 1,353 |
| 8 | September 21, 2023 08:45 | September 21, 2023 09:15 | 30m | 1,850 | 925 |
| 9 | January 12, 2023 07:15 | January 14, 2023 03:00 | 1d 19h | 1,839 | 6,110 |
| 10 | July 14, 2023 04:45 | July 15, 2023 06:45 | 1d 2h | 1,790 | 6,235 |
Outage episodes by size in 2023: 91 reached 100+ customers, 20 reached 1,000+ customers, 2 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 2023, 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 | 2023 | 11.5 hrs | 2.12 | 6.9 hrs | 1.77 |
| Johnson City - (TN) | 2023 | 1.8 hrs | 1.04 | 40 min | 0.67 |
| Kingsport Power Co | 2023 | 8.3 hrs | 2.07 | 3.2 hrs | 1.44 |
| City of Bristol - (TN) | 2023 | 2.3 hrs | 1.79 | - | - |
| 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 2023; 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, 2023, 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/2023/tennessee/sullivan-county