Clermont CountyPower Outage History
What this grade means
Worse than average — more frequent or longer outages than most counties. This county's recorded history shows more frequent outages and/or longer restoration times than most US counties over the same 12-year period. If you live here, it's worth taking backup power more seriously than an average household would.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 11, 2017 | <1 hr | 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 |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Clermont County, Ohio that day.
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 less than 1 hour 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).
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 |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
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 less than 1 hour and affecting up to 22,437 customers.