County annual report · FIPS 47089
2018 Jefferson County, TN Power Outage Report
In 2018, customers in Jefferson County, TN went without power for an average of 0.4 hours, a total of 12K customer-hours (Tennessee average 2.1 hours). That ranks 43rd worst of 71 Tennessee counties and 2564th of 2,798 nationally.
Compared with TN, the US and 2017
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Jefferson County, 2018
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 6, 2018 21:45 | July 6, 2018 23:00 | 1h 15m | 2,298 | 1,945 |
| 2 | June 26, 2018 21:15 | June 27, 2018 05:45 | 8h 30m | 1,348 | 2,968 |
| 3 | May 27, 2018 07:30 | May 27, 2018 16:30 | 9h | 1,215 | 988 |
| 4 | February 16, 2018 19:30 | February 16, 2018 19:45 | 15m | 498 | 125 |
| 5 | February 11, 2018 12:00 | February 11, 2018 19:45 | 7h 45m | 180 | 973 |
| 6 | July 6, 2018 23:45 | July 7, 2018 06:00 | 6h 15m | 170 | 610 |
| 7 | September 2, 2018 00:45 | September 2, 2018 03:30 | 2h 45m | 151 | 415 |
| 8 | August 9, 2018 22:15 | August 10, 2018 00:15 | 2h | 91 | 182 |
| 9 | November 9, 2018 22:30 | November 10, 2018 02:30 | 4h | 74 | 296 |
| 10 | November 26, 2018 13:00 | November 26, 2018 15:15 | 2h 15m | 69 | 155 |
Outage episodes by size in 2018: 7 reached 100+ customers, 3 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 2018, 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 | 2018 | 3.5 hrs | 1.84 | 2.1 hrs | 1.49 |
| Appalachian Electric Coop | 2018 | 4.9 hrs | 3.34 | 4.9 hrs | 3.34 |
| Holston Electric Coop, Inc | 2018 | 6.0 hrs | 2.49 | 2.2 hrs | 1.83 |
| Sevier County Electric System | 2018 | 4.7 hrs | 2.99 | 4.3 hrs | 2.88 |
| 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 55% of Tennessee's customers in 2018; 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, 2018, 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/2018/tennessee/jefferson-county