County annual report · FIPS 47187
2024 Williamson County, TN Power Outage Report
In 2024, customers in Williamson County, TN went without power for an average of 1.1 hours, a total of 132K customer-hours (Tennessee average 4.8 hours). That ranks 66th worst of 84 Tennessee counties and 2713th of 2,990 nationally.
Compared with TN, the US and 2023
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Williamson County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 23, 2024 00:45 | June 23, 2024 04:30 | 3h 45m | 6,497 | 3,267 |
| 2 | June 15, 2024 22:00 | June 16, 2024 03:45 | 5h 45m | 6,230 | 2,712 |
| 3 | April 19, 2024 12:45 | April 19, 2024 18:00 | 5h 15m | 5,176 | 2,604 |
| 4 | May 4, 2024 11:45 | May 5, 2024 06:15 | 18h 30m | 4,837 | 3,075 |
| 5 | April 9, 2024 13:45 | April 10, 2024 05:30 | 15h 45m | 4,365 | 11K |
| 6 | October 13, 2024 18:15 | October 13, 2024 18:30 | 15m | 3,817 | 954 |
| 7 | June 26, 2024 10:30 | June 27, 2024 10:15 | 23h 45m | 3,586 | 4,048 |
| 8 | July 9, 2024 02:30 | July 9, 2024 22:45 | 20h 15m | 3,368 | 3,024 |
| 9 | January 17, 2024 04:45 | January 17, 2024 16:45 | 12h | 3,251 | 4,614 |
| 10 | January 9, 2024 04:00 | January 10, 2024 01:15 | 21h 15m | 3,175 | 2,000 |
Outage episodes by size in 2024: 104 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 Williamson County reported on EIA Form 861 for 2024, 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 |
|---|---|---|---|---|---|
| Duck River Elec Member Corp | 2024 | 4.6 hrs | 2.46 | 2.7 hrs | 2.08 |
| Middle Tennessee E M C | 2024 | 49 min | 0.93 | 42 min | 0.88 |
| City of Dickson | 2024 | 5.2 hrs | 3.39 | 4.8 hrs | 3.26 |
| Nashville Electric Service | 2024 | 0 min | 0.00 | 87 min | 1.01 |
| Columbia Power System - (TN) | 2024 | 2.9 hrs | 2.77 | 2.7 hrs | 2.53 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Tennessee's customers in 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 123,583 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. Williamson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Williamson County, TN annual power outage report, 2024, 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/2024/tennessee/williamson-county