County annual report · FIPS 47089
2020 Jefferson County, TN Power Outage Report
In 2020, customers in Jefferson County, TN went without power for an average of 5.7 hours, a total of 184K customer-hours (Tennessee average 6.5 hours). That ranks 25th worst of 84 Tennessee counties and 1292nd of 3,019 nationally.
Compared with TN, the US and 2019
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Jefferson County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 31, 2020 21:45 | August 5, 2020 10:45 | 4d 13h | 5,280 | 44K |
| 2 | July 2, 2020 12:15 | July 6, 2020 23:15 | 4d 11h | 4,075 | 3,243 |
| 3 | December 24, 2020 03:15 | December 31, 2020 00:15 | 6d 21h | 2,698 | 98K |
| 4 | June 27, 2020 13:30 | June 27, 2020 16:15 | 2h 45m | 1,787 | 451 |
| 5 | June 4, 2020 19:45 | June 5, 2020 05:00 | 9h 15m | 1,713 | 4,743 |
| 6 | December 3, 2020 14:15 | December 3, 2020 20:45 | 6h 30m | 1,679 | 2,117 |
| 7 | April 12, 2020 02:00 | April 14, 2020 11:30 | 2d 9h | 1,249 | 2,880 |
| 8 | October 29, 2020 05:00 | October 29, 2020 23:15 | 18h 15m | 515 | 648 |
| 9 | January 13, 2020 14:45 | January 14, 2020 18:15 | 1d 3h | 483 | 394 |
| 10 | January 11, 2020 08:30 | January 13, 2020 13:30 | 2d 5h | 380 | 2,669 |
Outage episodes by size in 2020: 40 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 Jefferson County reported on EIA Form 861 for 2020, 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 | 2020 | 4.7 hrs | 2.11 | 2.1 hrs | 1.65 |
| Appalachian Electric Coop | 2020 | 4.9 hrs | 3.13 | 3.8 hrs | 2.84 |
| Holston Electric Coop, Inc | 2020 | 3.3 hrs | 2.50 | 2.6 hrs | 2.13 |
| Sevier County Electric System | 2020 | 26.1 hrs | 3.60 | 5.4 hrs | 2.14 |
| 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 73% of Tennessee's customers in 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 32,422 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. Jefferson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Jefferson County, TN annual power outage report, 2020, 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/2020/tennessee/jefferson-county