County annual report · FIPS 47165
2020 Sumner County, TN Power Outage Report
In 2020, customers in Sumner County, TN went without power for an average of 2.5 hours, a total of 209K customer-hours (Tennessee average 6.5 hours). That ranks 47th worst of 84 Tennessee counties and 2064th 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 Sumner 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 | May 3, 2020 18:45 | May 8, 2020 00:15 | 4d 5h | 8,262 | 98K |
| 2 | June 5, 2020 08:15 | June 5, 2020 09:45 | 1h 30m | 4,807 | 6,100 |
| 3 | August 8, 2020 11:45 | August 8, 2020 20:15 | 8h 30m | 3,764 | 3,156 |
| 4 | November 9, 2020 23:15 | November 10, 2020 01:30 | 2h 15m | 3,151 | 5,145 |
| 5 | November 15, 2020 08:15 | November 16, 2020 03:00 | 18h 45m | 3,131 | 5,157 |
| 6 | July 6, 2020 07:15 | July 6, 2020 08:30 | 1h 15m | 3,103 | 1,751 |
| 7 | July 24, 2020 11:45 | July 25, 2020 05:45 | 18h | 2,902 | 5,704 |
| 8 | May 1, 2020 19:15 | May 2, 2020 00:15 | 5h | 2,891 | 1,914 |
| 9 | November 23, 2020 01:00 | November 23, 2020 09:30 | 8h 30m | 2,634 | 5,271 |
| 10 | April 9, 2020 01:00 | April 10, 2020 00:45 | 23h 45m | 2,045 | 8,817 |
Outage episodes by size in 2020: 82 reached 100+ customers, 27 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 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 |
|---|---|---|---|---|---|
| Tri-County Elec Member Corp (TN) | 2020 | 4.6 hrs | 2.90 | 4.6 hrs | 2.90 |
| Nashville Electric Service | 2020 | 30.9 hrs | 2.52 | 1.7 hrs | 1.44 |
| 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 73% of Tennessee's customers in 2020; 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, 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/sumner-county