Johnson 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 |
|---|---|---|---|
| Jun 11, 2019 | 4 hrs | 6,008 (32%) | Flash Flood |
| May 1, 2019 | 30 hrs | 3,506 (18%) | Thunderstorm Wind |
| May 20, 2024 | 2 hrs | 3,161 (17%) | Unnamed event |
| May 18, 2019 | 26 hrs | 2,831 (15%) | Thunderstorm Wind |
| Oct 25, 2025 | 3 hrs | 2,480 (13%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Johnson County, Arkansas that day.
Over the 10 years from 2016 to 2025, Johnson County recorded 313 distinct power outage events, averaging 3.4 hours per event.
The single worst outage on record in Johnson County started June 11, 2019 (Flash Flood), lasting 4 hours and leaving up to 6,008 customers without power (32% of the county) at its peak.
May has historically been the worst month for outages in Johnson County, with 36 events recorded during that month across the dataset.
Based on this history, Johnson County earns a Reliability Grade of B, placing it in the 64th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Arkansas
Counties with the closest reliability grade and national percentile to Johnson County.
| County | Grade | National percentile |
|---|---|---|
| Cleburne County | B | 62nd |
| Sebastian County | B | 67th |
| Searcy County | B | 67th |
| Crawford County | B | 60th |
| Lincoln County | B | 72nd |
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 2016 and 2025, Johnson County recorded 313 outage events, averaging 3.4 hours each.
What is Johnson County's reliability grade?
Johnson County has a Reliability Grade of B, in the 64th national percentile.
What was the worst power outage in Johnson County?
The worst outage on record started June 11, 2019 (Flash Flood), lasting 4 hours and affecting up to 6,008 customers.