Greene 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 |
|---|---|---|---|
| May 12, 2019 | 2 hrs | 15,903 (38%) | Unnamed event |
| May 17, 2025 | 20 hrs | 9,221 (22%) | Thunderstorm Wind |
| Sep 27, 2024 | 27 hrs | 8,785 (21%) | Tropical Storm Helene |
| Dec 24, 2022 | 5 hrs | 8,053 (19%) | Winter Storm Elliott |
| Sep 27, 2024 | 9 hrs | 5,767 (14%) | Tropical Storm Helene |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Greene County, Tennessee that day.
Over the 9 years from 2017 to 2025, Greene County recorded 440 distinct power outage events, averaging 1.6 hours per event.
The single worst outage on record in Greene County started May 12, 2019, lasting 2 hours and leaving up to 15,903 customers without power (38% of the county) at its peak.
December has historically been the worst month for outages in Greene County, with 62 events recorded during that month across the dataset.
Based on this history, Greene County earns a Reliability Grade of B, placing it in the 76th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Tennessee
Counties with the closest reliability grade and national percentile to Greene County.
| County | Grade | National percentile |
|---|---|---|
| Marion County | B | 77th |
| Marshall County | B | 77th |
| Franklin County | B | 78th |
| Cannon County | B | 78th |
| McMinn County | B | 78th |
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 Greene County?
Between 2017 and 2025, Greene County recorded 440 outage events, averaging 1.6 hours each.
What is Greene County's reliability grade?
Greene County has a Reliability Grade of B, in the 76th national percentile.
What was the worst power outage in Greene County?
The worst outage on record started May 12, 2019, lasting 2 hours and affecting up to 15,903 customers.