County annual report · FIPS 47173
2023 Union County, TN Power Outage Report
In 2023, customers in Union County, TN went without power for an average of 6.8 hours, a total of 64K customer-hours (Tennessee average 11.1 hours). That ranks 32nd worst of 83 Tennessee counties and 1176th 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 Union 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 | July 13, 2023 18:00 | July 13, 2023 23:45 | 5h 45m | 2,862 | 742 |
| 2 | September 14, 2023 12:30 | September 14, 2023 16:00 | 3h 30m | 2,034 | 1,028 |
| 3 | September 14, 2023 17:15 | September 14, 2023 17:30 | 15m | 2,030 | 508 |
| 4 | January 12, 2023 08:30 | January 12, 2023 12:00 | 3h 30m | 1,949 | 1,806 |
| 5 | April 1, 2023 09:15 | April 4, 2023 00:30 | 2d 15h | 1,572 | 16K |
| 6 | August 22, 2023 01:00 | August 22, 2023 08:15 | 7h 15m | 1,265 | 1,343 |
| 7 | July 6, 2023 19:00 | July 6, 2023 22:15 | 3h 15m | 1,004 | 273 |
| 8 | July 25, 2023 20:00 | July 26, 2023 03:15 | 7h 15m | 882 | 792 |
| 9 | July 23, 2023 12:00 | July 23, 2023 12:45 | 45m | 859 | 433 |
| 10 | July 3, 2023 19:30 | July 4, 2023 01:45 | 6h 15m | 842 | 729 |
Outage episodes by size in 2023: 46 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 Union 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 |
|---|---|---|---|---|---|
| Powell Valley Electric Coop | 2023 | 4.3 hrs | 4.66 | 3.5 hrs | 4.60 |
| Knoxville Utilities Board | 2023 | 6.0 hrs | 2.42 | 2.1 hrs | 1.50 |
| City of Clinton - (TN) | 2023 | 2.7 hrs | 1.55 | 83 min | 1.20 |
| City of LaFollette | 2023 | 8.1 hrs | 5.00 | - | - |
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 ÷ 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, 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/union-county