County annual report · FIPS 47165
2018 Sumner County, TN Power Outage Report
In 2018, customers in Sumner County, TN went without power for an average of 1.2 hours, a total of 102K customer-hours (Tennessee average 2.1 hours). That ranks 31st worst of 71 Tennessee counties and 2229th 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 Sumner 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 3, 2018 17:15 | July 4, 2018 06:30 | 13h 15m | 4,974 | 3,026 |
| 2 | August 21, 2018 03:15 | August 21, 2018 06:45 | 3h 30m | 4,863 | 4,615 |
| 3 | August 3, 2018 12:30 | August 3, 2018 13:15 | 45m | 3,658 | 1,894 |
| 4 | December 9, 2018 07:30 | December 10, 2018 09:30 | 1d 2h | 3,376 | 18K |
| 5 | February 19, 2018 13:30 | February 20, 2018 01:00 | 11h 30m | 2,866 | 2,415 |
| 6 | June 27, 2018 18:00 | June 28, 2018 07:45 | 13h 45m | 2,704 | 4,471 |
| 7 | August 21, 2018 13:15 | August 21, 2018 17:00 | 3h 45m | 1,646 | 1,654 |
| 8 | May 27, 2018 16:45 | May 27, 2018 17:45 | 1h | 1,470 | 1,470 |
| 9 | December 15, 2018 13:15 | December 15, 2018 16:30 | 3h 15m | 1,463 | 2,197 |
| 10 | July 23, 2018 12:00 | July 23, 2018 13:30 | 1h 30m | 1,402 | 356 |
Outage episodes by size in 2018: 81 reached 100+ customers, 19 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 Sumner 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 |
|---|---|---|---|---|---|
| Tri-County Elec Member Corp (TN) | 2018 | 4.7 hrs | 3.38 | 3.3 hrs | 3.12 |
| Nashville Electric Service | 2018 | 1.8 hrs | 1.56 | 1.8 hrs | 1.56 |
| Cumberland Elec Member Corp | - | - | - | - | - |
| City of Gallatin - (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 ÷ 85,061 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. Sumner County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sumner 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/sumner-county