Guernsey CountyPower Outage History
What this grade means
Average — typical outage frequency and duration nationally. This county sits in the middle of the national distribution — its outage frequency and duration over the past 12 years are close to the nationwide median, neither notably better nor worse than most other US counties. A typical amount of backup-power preparedness is reasonable here.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Sep 15, 2020 | <1 hr | 5,994 (22%) | Unnamed event |
| Sep 15, 2020 | <1 hr | 5,994 (22%) | Unnamed event |
| Sep 11, 2020 | <1 hr | 5,981 (22%) | Unnamed event |
| Sep 11, 2020 | <1 hr | 5,981 (22%) | Unnamed event |
| Sep 11, 2020 | <1 hr | 5,981 (22%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Guernsey County, Ohio that day.
Over the 12 years from 2014 to 2025, Guernsey County recorded 519 distinct power outage events, averaging 3.5 hours per event.
The single worst outage on record in Guernsey County started September 15, 2020, lasting less than 1 hour and leaving up to 5,994 customers without power (22% of the county) at its peak.
August has historically been the worst month for outages in Guernsey County, with 56 events recorded during that month across the dataset.
Based on this history, Guernsey County earns a Reliability Grade of C, placing it in the 48th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Ohio
Counties with the closest reliability grade and national percentile to Guernsey County.
| County | Grade | National percentile |
|---|---|---|
| Fairfield County | C | 48th |
| Washington County | C | 47th |
| Ashland County | C | 49th |
| Morrow County | C | 46th |
| Fayette County | C | 50th |
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 Guernsey County?
Between 2014 and 2025, Guernsey County recorded 519 outage events, averaging 3.5 hours each.
What is Guernsey County's reliability grade?
Guernsey County has a Reliability Grade of C, in the 48th national percentile.
What was the worst power outage in Guernsey County?
The worst outage on record started September 15, 2020, lasting less than 1 hour and affecting up to 5,994 customers.