Overton CountyPower Outage History
What this grade means
Top 20% most reliable nationally — infrequent, short outages. This county ranks in the most reliable fifth of all US counties in our dataset, based on 12 years of real DOE outage records: outages happen less often here, and when they do occur they tend to be resolved quickly compared to the rest of the country. Baseline outage risk is low, though a severe local storm can still occasionally cause a longer-than-usual outage regardless of the long-term track record.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| May 13, 2015 | 2 hrs | 2,714 (20%) | Unnamed event |
| Oct 18, 2016 | 6 hrs | 2,701 (20%) | Unnamed event |
| Jul 4, 2015 | <1 hr | 2,697 (20%) | Thunderstorm Wind |
| May 2, 2018 | 3 hrs | 2,660 (20%) | Unnamed event |
| Jul 20, 2018 | <1 hr | 2,651 (20%) | Thunderstorm Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Overton County, Tennessee that day.
Over the 11 years from 2015 to 2025, Overton County recorded 221 distinct power outage events, averaging 2.0 hours per event.
The single worst outage on record in Overton County started May 13, 2015, lasting 2 hours and leaving up to 2,714 customers without power (20% of the county) at its peak.
July has historically been the worst month for outages in Overton County, with 44 events recorded during that month across the dataset.
Based on this history, Overton County earns a Reliability Grade of A, placing it in the 88th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Tennessee
Counties with the closest reliability grade and national percentile to Overton County.
| County | Grade | National percentile |
|---|---|---|
| Hamilton County | A | 88th |
| Gibson County | A | 88th |
| Hamblen County | A | 90th |
| Williamson County | A | 90th |
| Anderson County | A | 91st |
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 Overton County?
Between 2015 and 2025, Overton County recorded 221 outage events, averaging 2.0 hours each.
What is Overton County's reliability grade?
Overton County has a Reliability Grade of A, in the 88th national percentile.
What was the worst power outage in Overton County?
The worst outage on record started May 13, 2015, lasting 2 hours and affecting up to 2,714 customers.