Johnson CountyPower Outage History
What this grade means
Bottom 20% least reliable nationally — frequent and/or long outages. This county ranks in the least reliable fifth of all US counties in our dataset: some combination of frequent outages, long restoration times, or customers affected puts it near the bottom nationally. Backup power is worth prioritizing here rather than treating it as optional.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Sep 27, 2024 | 216 hrs | 5,645 (80%) | Hurricane Helene |
| Aug 6, 2023 | 7 hrs | 5,159 (73%) | Thunderstorm Wind |
| Oct 11, 2018 | 71 hrs | 4,835 (68%) | Hurricane Michael |
| Jun 26, 2025 | 17 hrs | 3,542 (50%) | Thunderstorm Wind |
| Jun 4, 2020 | 2 hrs | 3,532 (50%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Johnson County, Georgia that day.
Over the 12 years from 2014 to 2025, Johnson County recorded 581 distinct power outage events, averaging 3.3 hours per event.
The single worst outage on record in Johnson County started September 27, 2024 (Hurricane Helene), lasting 216 hours and leaving up to 5,645 customers without power (80% of the county) at its peak.
August has historically been the worst month for outages in Johnson County, with 85 events recorded during that month across the dataset.
Based on this history, Johnson County earns a Reliability Grade of F, placing it in the 5th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Georgia
Counties with the closest reliability grade and national percentile to Johnson County.
| County | Grade | National percentile |
|---|---|---|
| Ware County | F | 5th |
| Evans County | F | 5th |
| Candler County | F | 5th |
| McIntosh County | F | 5th |
| Glynn County | F | 5th |
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 Johnson County?
Between 2014 and 2025, Johnson County recorded 581 outage events, averaging 3.3 hours each.
What is Johnson County's reliability grade?
Johnson County has a Reliability Grade of F, in the 5th national percentile.
What was the worst power outage in Johnson County?
The worst outage on record started September 27, 2024 (Hurricane Helene), lasting 216 hours and affecting up to 5,645 customers.