Jefferson Davis 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 |
|---|---|---|---|
| Oct 26, 2019 | 57 hrs | 5,670 (74%) | Tropical Storm Olga |
| Dec 8, 2017 | 59 hrs | 5,455 (71%) | Heavy Snow |
| Feb 15, 2021 | 73 hrs | 4,408 (57%) | Winter Storm Uri |
| Oct 26, 2019 | 3 hrs | 3,629 (47%) | Tropical Storm Olga |
| May 26, 2025 | 17 hrs | 3,229 (42%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Jefferson Davis County, Mississippi that day.
Over the 12 years from 2014 to 2025, Jefferson Davis County recorded 1,237 distinct power outage events, averaging 3.0 hours per event.
The single worst outage on record in Jefferson Davis County started October 26, 2019 (Tropical Storm Olga), lasting 57 hours and leaving up to 5,670 customers without power (74% of the county) at its peak.
July has historically been the worst month for outages in Jefferson Davis County, with 157 events recorded during that month across the dataset.
Based on this history, Jefferson Davis County earns a Reliability Grade of F, placing it in the 9th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Mississippi
Counties with the closest reliability grade and national percentile to Jefferson Davis County.
| County | Grade | National percentile |
|---|---|---|
| Walthall County | F | 9th |
| Simpson County | F | 9th |
| Tallahatchie County | F | 10th |
| Pike County | F | 8th |
| Smith County | F | 8th |
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 Jefferson Davis County?
Between 2014 and 2025, Jefferson Davis County recorded 1,237 outage events, averaging 3.0 hours each.
What is Jefferson Davis County's reliability grade?
Jefferson Davis County has a Reliability Grade of F, in the 9th national percentile.
What was the worst power outage in Jefferson Davis County?
The worst outage on record started October 26, 2019 (Tropical Storm Olga), lasting 57 hours and affecting up to 5,670 customers.