Mercer County Power Outage History
2015–2025 · Kentucky
Better than average — fewer or shorter outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jan 12, 2023 | 4 hrs | 6,309 (47%) | Tornado |
| Nov 5, 2025 | 1 hrs | 3,744 (28%) | Unnamed event |
| Mar 3, 2023 | 97 hrs | 3,261 (24%) | High Wind |
| Jun 25, 2016 | 3 hrs | 3,080 (23%) | Unnamed event |
| May 26, 2024 | 57 hrs | 2,878 (22%) | Thunderstorm Wind |
Over the 11 years from 2015 to 2025, Mercer County recorded 376 distinct power outage events, averaging 2.6 hours per event.
The single worst outage on record in Mercer County started January 12, 2023 (Tornado), lasting 4 hours and leaving up to 6,309 customers without power (47% of the county) at its peak.
July has historically been the worst month for outages in Mercer County, with 61 events recorded during that month across the dataset.
Based on this history, Mercer County earns a Reliability Grade of B, placing it in the 67th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Mercer County's outage profile
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Similar counties in Kentucky
Counties with the closest reliability grade and national percentile to Mercer County.
| County | Grade | National percentile |
|---|---|---|
| Franklin County | B | 67th |
| Madison County | B | 67th |
| Larue County | B | 66th |
| Kenton County | B | 66th |
| Boyle County | B | 69th |
FAQ
How often does power go out in Mercer County?
Between 2015 and 2025, Mercer County recorded 376 outage events, averaging 2.6 hours each.
What is Mercer County's reliability grade?
Mercer County has a Reliability Grade of B, in the 67th national percentile.
What was the worst power outage in Mercer County?
The worst outage on record started January 12, 2023 (Tornado), lasting 4 hours and affecting up to 6,309 customers.