County annual report · FIPS 47189
2021 Wilson County, TN Power Outage Report
In 2021, customers in Wilson County, TN went without power for an average of 1.5 hours, a total of 100K customer-hours (Tennessee average 3.7 hours). That ranks 58th worst of 84 Tennessee counties and 2475th 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 Wilson 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 11, 2021 09:45 | December 14, 2021 23:15 | 3d 13h | 7,628 | 38K |
| 2 | September 1, 2021 12:45 | September 2, 2021 02:15 | 13h 30m | 7,469 | 2,134 |
| 3 | March 15, 2021 12:30 | March 15, 2021 21:00 | 8h 30m | 5,884 | 7,385 |
| 4 | February 10, 2021 13:00 | February 10, 2021 18:00 | 5h | 3,240 | 1,629 |
| 5 | August 14, 2021 22:45 | August 14, 2021 23:15 | 30m | 3,077 | 770 |
| 6 | August 19, 2021 20:00 | August 20, 2021 04:00 | 8h | 3,068 | 2,490 |
| 7 | March 27, 2021 11:15 | March 28, 2021 21:15 | 1d 10h | 2,807 | 2,846 |
| 8 | December 18, 2021 23:45 | December 19, 2021 05:15 | 5h 30m | 2,785 | 1,100 |
| 9 | September 28, 2021 12:45 | September 28, 2021 21:45 | 9h | 2,559 | 704 |
| 10 | March 22, 2021 11:45 | March 22, 2021 20:45 | 9h | 2,530 | 735 |
Outage episodes by size in 2021: 74 reached 100+ customers, 31 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 Wilson 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 ÷ 67,214 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. Wilson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Wilson 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/wilson-county