Clermont County Power Outage History
2014–2025 · Ohio
Worse than average — more frequent or longer 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 |
|---|---|---|---|
| Aug 11, 2017 | 0 hrs | 22,437 (23%) | Unnamed event |
| Jul 6, 2022 | 74 hrs | 21,010 (21%) | Hail |
| Sep 27, 2024 | 36 hrs | 19,484 (20%) | Hurricane Helene |
| Nov 5, 2022 | 9 hrs | 18,327 (19%) | Unnamed event |
| Jul 14, 2015 | 11 hrs | 17,977 (18%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Clermont County recorded 1,242 distinct power outage events, averaging 2.8 hours per event.
The single worst outage on record in Clermont County started August 11, 2017, lasting 0 hours and leaving up to 22,437 customers without power (23% of the county) at its peak.
July has historically been the worst month for outages in Clermont County, with 139 events recorded during that month across the dataset.
Based on this history, Clermont County earns a Reliability Grade of D, placing it in the 34th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Ohio
Counties with the closest reliability grade and national percentile to Clermont County.
| County | Grade | National percentile |
|---|---|---|
| Tuscarawas County | D | 34th |
| Ross County | D | 33rd |
| Trumbull County | D | 36th |
| Holmes County | D | 36th |
| Clinton County | D | 37th |
FAQ
How often does power go out in Clermont County?
Between 2014 and 2025, Clermont County recorded 1,242 outage events, averaging 2.8 hours each.
What is Clermont County's reliability grade?
Clermont County has a Reliability Grade of D, in the 34th national percentile.
What was the worst power outage in Clermont County?
The worst outage on record started August 11, 2017, lasting 0 hours and affecting up to 22,437 customers.