Defiance CountyPower Outage History
What this grade means
Better than average — fewer or shorter outages than most counties. This county's outage history is better than the national median: recorded outages are less frequent and/or shorter in duration than a typical US county experienced over the same 12-year period. It isn't in the top tier nationally, but its track record points to lower-than-average outage risk.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Apr 17, 2015 | 2 hrs | 6,724 (36%) | Unnamed event |
| May 30, 2024 | 3 hrs | 6,097 (33%) | Unnamed event |
| Sep 24, 2022 | 7 hrs | 6,086 (33%) | Unnamed event |
| Apr 7, 2019 | <1 hr | 5,794 (31%) | Unnamed event |
| May 7, 2021 | 3 hrs | 5,610 (30%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Defiance County, Ohio that day.
Over the 12 years from 2014 to 2025, Defiance County recorded 354 distinct power outage events, averaging 2.9 hours per event.
The single worst outage on record in Defiance County started April 17, 2015, lasting 2 hours and leaving up to 6,724 customers without power (36% of the county) at its peak.
June has historically been the worst month for outages in Defiance County, with 46 events recorded during that month across the dataset.
Based on this history, Defiance County earns a Reliability Grade of B, placing it in the 71st percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Ohio
Counties with the closest reliability grade and national percentile to Defiance County.
| County | Grade | National percentile |
|---|---|---|
| Butler County | B | 71st |
| Medina County | B | 72nd |
| Henry County | B | 73rd |
| Madison County | B | 74th |
| Miami County | B | 74th |
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 Defiance County?
Between 2014 and 2025, Defiance County recorded 354 outage events, averaging 2.9 hours each.
What is Defiance County's reliability grade?
Defiance County has a Reliability Grade of B, in the 71st national percentile.
What was the worst power outage in Defiance County?
The worst outage on record started April 17, 2015, lasting 2 hours and affecting up to 6,724 customers.