County annual report · FIPS 47037
2021 Davidson County, TN Power Outage Report
In 2021, customers in Davidson County, TN went without power for an average of 6.4 hours, a total of 2.3M customer-hours (Tennessee average 3.7 hours). That ranks 18th worst of 84 Tennessee counties and 1096th 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 Davidson 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 | December 10, 2021 13:00 | December 18, 2021 05:45 | 7d 16h | 83,500 | 1.3M |
| 2 | March 25, 2021 12:00 | April 4, 2021 06:45 | 9d 18h | 16,567 | 280K |
| 3 | July 31, 2021 07:45 | August 3, 2021 03:30 | 2d 19h | 12,398 | 88K |
| 4 | June 29, 2021 07:15 | June 30, 2021 02:15 | 19h | 8,260 | 3,095 |
| 5 | July 17, 2021 11:00 | July 18, 2021 09:30 | 22h 30m | 7,810 | 4,752 |
| 6 | March 5, 2021 10:00 | March 6, 2021 07:15 | 21h 15m | 7,454 | 11K |
| 7 | June 1, 2021 11:00 | June 2, 2021 03:00 | 16h | 7,445 | 6,373 |
| 8 | March 14, 2021 09:00 | March 15, 2021 00:00 | 15h | 7,435 | 9,843 |
| 9 | May 3, 2021 03:15 | May 8, 2021 08:15 | 5d 5h | 6,885 | 66K |
| 10 | May 26, 2021 11:00 | May 27, 2021 07:45 | 20h 45m | 6,311 | 7,187 |
Outage episodes by size in 2021: 178 reached 100+ customers, 81 reached 1,000+ customers, 3 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 Davidson 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 |
|---|---|---|---|---|---|
| Middle Tennessee E M C | 2021 | 65 min | 1.00 | 55 min | 0.96 |
| Nashville Electric Service | 2021 | 12.8 hrs | 1.82 | 1.7 hrs | 1.27 |
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 ÷ 359,052 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. Davidson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Davidson 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2021/tennessee/davidson-county