County annual report · FIPS 47077
2021 Henderson County, TN Power Outage Report
In 2021, customers in Henderson County, TN went without power for an average of 1.0 hours, a total of 17K customer-hours (Tennessee average 3.7 hours). That ranks 65th worst of 84 Tennessee counties and 2657th of 2,974 nationally.
Compared with TN, the US and 2020
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Henderson County, 2021
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 6, 2021 21:00 | May 7, 2021 12:00 | 15h | 1,263 | 3,366 |
| 2 | March 28, 2021 01:45 | March 28, 2021 13:15 | 11h 30m | 1,219 | 1,705 |
| 3 | December 11, 2021 07:45 | December 12, 2021 15:15 | 1d 7h | 740 | 6,793 |
| 4 | July 21, 2021 06:00 | July 21, 2021 12:15 | 6h 15m | 473 | 716 |
| 5 | August 1, 2021 03:45 | August 2, 2021 12:30 | 1d 8h | 461 | 2,122 |
| 6 | July 12, 2021 12:00 | July 12, 2021 14:15 | 2h 15m | 179 | 403 |
| 7 | July 31, 2021 11:45 | July 31, 2021 16:30 | 4h 45m | 178 | 504 |
| 8 | August 9, 2021 11:15 | August 9, 2021 14:15 | 3h | 178 | 189 |
| 9 | September 13, 2021 02:00 | September 13, 2021 12:15 | 10h 15m | 55 | 339 |
| 10 | June 28, 2021 23:45 | June 29, 2021 00:00 | 15m | 45 | 11 |
Outage episodes by size in 2021: 8 reached 100+ customers, 2 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 Henderson County reported on EIA Form 861 for 2021, 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 |
|---|---|---|---|---|---|
| Southwest Tennessee E M C | - | - | - | - | - |
| City of Lexington - (TN) | - | - | - | - | - |
| Carroll County - (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 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 16,597 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. Henderson County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Henderson County, TN annual power outage report, 2021, 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/). https://massoutage.com/reports/2021/tennessee/henderson-county