Marshall 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, 2024 | 1 hrs | 7,712 (42%) | Unnamed event |
| May 8, 2024 | 25 hrs | 6,697 (37%) | Tornado |
| Jun 28, 2018 | 7 hrs | 5,394 (29%) | Thunderstorm Wind |
| Jun 4, 2024 | 1 hrs | 4,498 (25%) | Unnamed event |
| Dec 15, 2025 | 2 hrs | 4,329 (24%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Marshall County, Tennessee that day.
Over the 12 years from 2014 to 2025, Marshall County recorded 322 distinct power outage events, averaging 2.0 hours per event.
The single worst outage on record in Marshall County started April 17, 2024, lasting 1 hours and leaving up to 7,712 customers without power (42% of the county) at its peak.
June has historically been the worst month for outages in Marshall County, with 42 events recorded during that month across the dataset.
Based on this history, Marshall County earns a Reliability Grade of B, placing it in the 77th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Tennessee
Counties with the closest reliability grade and national percentile to Marshall County.
| County | Grade | National percentile |
|---|---|---|
| Marion County | B | 77th |
| Franklin County | B | 78th |
| Cannon County | B | 78th |
| McMinn County | B | 78th |
| Greene County | B | 76th |
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 Marshall County?
Between 2014 and 2025, Marshall County recorded 322 outage events, averaging 2.0 hours each.
What is Marshall County's reliability grade?
Marshall County has a Reliability Grade of B, in the 77th national percentile.
What was the worst power outage in Marshall County?
The worst outage on record started April 17, 2024, lasting 1 hours and affecting up to 7,712 customers.