County annual report · FIPS 47173
2020 Union County, TN Power Outage Report
In 2020, customers in Union County, TN went without power for an average of 11.3 hours, a total of 107K customer-hours (Tennessee average 6.5 hours). That ranks 9th worst of 84 Tennessee counties and 707th 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 Union 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 | March 13, 2020 13:30 | March 13, 2020 14:00 | 30m | 8,591 | 2,154 |
| 2 | September 11, 2020 22:30 | September 11, 2020 22:45 | 15m | 2,960 | 740 |
| 3 | July 28, 2020 02:15 | July 28, 2020 02:45 | 30m | 1,898 | 475 |
| 4 | December 24, 2020 12:00 | December 28, 2020 19:00 | 4d 7h | 1,898 | 26K |
| 5 | January 11, 2020 18:15 | January 12, 2020 09:45 | 15h 30m | 1,707 | 6,681 |
| 6 | April 13, 2020 03:15 | April 13, 2020 14:30 | 11h 15m | 1,322 | 2,582 |
| 7 | October 29, 2020 09:15 | October 30, 2020 14:45 | 1d 5h | 1,192 | 3,714 |
| 8 | July 24, 2020 20:30 | July 25, 2020 21:00 | 1d | 1,173 | 3,016 |
| 9 | September 28, 2020 13:15 | September 28, 2020 13:30 | 15m | 1,081 | 270 |
| 10 | September 3, 2020 10:00 | September 4, 2020 20:30 | 1d 10h | 1,075 | 1,106 |
Outage episodes by size in 2020: 70 reached 100+ customers, 11 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 Union 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 |
|---|---|---|---|---|---|
| Powell Valley Electric Coop | 2018 | 2.8 hrs | 1.77 | 88 min | 1.44 |
| Knoxville Utilities Board | 2020 | 4.7 hrs | 2.11 | 2.1 hrs | 1.65 |
| City of Clinton - (TN) | 2020 | 1.7 hrs | 1.29 | 1.7 hrs | 1.28 |
| City of LaFollette | 2020 | 9.6 hrs | 5.30 | 5.6 hrs | 4.90 |
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 ÷ 9,474 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. Union County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Union 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/union-county