County annual report · FIPS 21111
2025 Jefferson County, KY Power Outage Report
In 2025, customers in Jefferson County, KY went without power for an average of 4.6 hours, a total of 1.8M customer-hours (Kentucky average 7.0 hours). That ranks 92nd worst of 120 Kentucky counties and 1612th of 3,000 nationally.
Compared with KY, the US and 2024
Coverage line is EAGLE-I's share of Kentucky customers tracked each year.
Biggest outages in Jefferson County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | November 4, 2025 12:00 | December 8, 2025 11:45 | 33d 23h | 141,810 | 142K |
| 2 | May 16, 2025 08:15 | May 20, 2025 06:00 | 3d 21h | 30,299 | 701K |
| 3 | March 31, 2025 01:45 | April 2, 2025 08:15 | 2d 6h | 24,061 | 117K |
| 4 | April 29, 2025 12:00 | April 30, 2025 01:45 | 13h 45m | 13,611 | 7,509 |
| 5 | February 13, 2025 05:15 | February 26, 2025 09:45 | 13d 4h | 11,646 | 55K |
| 6 | May 9, 2025 04:45 | May 10, 2025 04:45 | 1d | 10,754 | 2,883 |
| 7 | April 2, 2025 10:45 | April 17, 2025 23:00 | 15d 12h | 7,045 | 193K |
| 8 | August 19, 2025 05:00 | August 21, 2025 08:30 | 2d 3h | 6,489 | 32K |
| 9 | June 30, 2025 10:45 | July 2, 2025 05:45 | 1d 19h | 4,745 | 3,469 |
| 10 | June 24, 2025 21:45 | June 27, 2025 21:30 | 2d 23h | 4,494 | 36K |
Outage episodes by size in 2025: 212 reached 100+ customers, 60 reached 1,000+ customers, 6 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 Jefferson County reported on EIA Form 861 for 2025, 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 |
|---|---|---|---|---|---|
| Salt River Electric Coop Corp | 2024 | 6.0 hrs | 2.60 | 2.2 hrs | 1.60 |
| Shelby Energy Coop, Inc - (KY) | 2024 | 8.8 hrs | 2.00 | 3.0 hrs | 1.25 |
| Louisville Gas & Electric Co | 2024 | 7.2 hrs | 1.30 | 83 min | 0.85 |
| Kentucky (statewide) | - | - | - | - | - |
| LG&E and KU | - | - | - | - | - |
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 Kentucky's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 390,033 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. Jefferson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Jefferson County, KY annual power outage report, 2025, 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/2025/kentucky/jefferson-county