County annual report · FIPS 21111
2023 Jefferson County, KY Power Outage Report
In 2023, customers in Jefferson County, KY went without power for an average of 18.0 hours, a total of 7.0M customer-hours (Kentucky average 14.9 hours). That ranks 40th worst of 120 Kentucky counties and 467th of 2,977 nationally.
Compared with KY, the US and 2022
Coverage line is EAGLE-I's share of Kentucky customers tracked each year.
Biggest outages in Jefferson County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 3, 2023 08:30 | March 11, 2023 04:00 | 7d 19h | 82,578 | 5.1M |
| 2 | August 25, 2023 12:15 | August 29, 2023 10:15 | 3d 22h | 26,444 | 507K |
| 3 | June 25, 2023 05:45 | June 29, 2023 08:30 | 4d 2h | 23,449 | 377K |
| 4 | April 4, 2023 11:00 | April 8, 2023 07:30 | 3d 20h | 20,296 | 315K |
| 5 | March 31, 2023 15:00 | April 4, 2023 09:00 | 3d 18h | 10,928 | 218K |
| 6 | March 20, 2023 12:30 | March 20, 2023 22:30 | 10h | 10,496 | 2,824 |
| 7 | November 3, 2023 13:00 | November 4, 2023 00:00 | 11h | 10,287 | 3,973 |
| 8 | November 18, 2023 04:30 | November 18, 2023 07:00 | 2h 30m | 7,122 | 1,800 |
| 9 | February 27, 2023 13:30 | March 1, 2023 02:30 | 1d 13h | 7,040 | 41K |
| 10 | August 19, 2023 11:15 | August 19, 2023 19:15 | 8h | 6,731 | 6,176 |
Outage episodes by size in 2023: 228 reached 100+ customers, 53 reached 1,000+ customers, 7 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 2023, 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 | 2023 | 15.1 hrs | 2.32 | 2.6 hrs | 1.32 |
| Shelby Energy Coop, Inc - (KY) | 2023 | 7.2 hrs | 2.06 | 3.1 hrs | 1.38 |
| Louisville Gas & Electric Co | 2023 | 19.4 hrs | 1.47 | 69 min | 0.70 |
| 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 2023; 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, 2023, 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/2023/kentucky/jefferson-county