County annual report · FIPS 47173
2019 Union County, TN Power Outage Report
In 2019, customers in Union County, TN went without power for an average of 11.3 hours, a total of 107K customer-hours (Tennessee average 2.7 hours). That ranks 4th worst of 86 Tennessee counties and 477th of 2,945 nationally.
Compared with TN, the US and 2018
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Union County, 2019
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 14, 2019 00:30 | May 14, 2019 14:00 | 13h 30m | 8,582 | 5,131 |
| 2 | June 22, 2019 03:45 | June 23, 2019 16:30 | 1d 12h | 6,918 | 18K |
| 3 | October 31, 2019 12:30 | November 2, 2019 01:45 | 1d 13h | 1,984 | 8,881 |
| 4 | September 10, 2019 16:00 | September 10, 2019 17:30 | 1h 30m | 1,313 | 907 |
| 5 | April 19, 2019 06:15 | April 19, 2019 18:30 | 12h 15m | 1,090 | 3,566 |
| 6 | March 29, 2019 16:45 | March 29, 2019 23:00 | 6h 15m | 1,032 | 536 |
| 7 | July 7, 2019 20:30 | July 8, 2019 02:15 | 5h 45m | 893 | 1,307 |
| 8 | October 16, 2019 13:45 | October 16, 2019 23:00 | 9h 15m | 843 | 3,006 |
| 9 | June 24, 2019 16:45 | June 25, 2019 10:45 | 18h | 805 | 4,077 |
| 10 | April 14, 2019 19:00 | April 15, 2019 21:00 | 1d 2h | 785 | 1,236 |
Outage episodes by size in 2019: 50 reached 100+ customers, 6 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 2019, 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 | 2018 | 3.5 hrs | 1.84 | 2.1 hrs | 1.49 |
| City of Clinton - (TN) | 2018 | 77 min | 1.51 | 77 min | 1.51 |
| City of LaFollette | 2018 | 4.0 hrs | 3.34 | 3.4 hrs | 3.08 |
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 2019; 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, 2019, 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/2019/tennessee/union-county