Grundy County Power Outage History
2020–2025 · Tennessee
Worse than average — more frequent or longer outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Nov 5, 2025 | 111 hrs | 3,989 (45%) | Unnamed event |
| Apr 28, 2025 | 6 hrs | 3,703 (42%) | Unnamed event |
| May 9, 2024 | 21 hrs | 3,651 (41%) | Thunderstorm Wind |
| Apr 6, 2025 | 33 hrs | 3,641 (41%) | Tornado |
| Mar 8, 2024 | 6 hrs | 3,638 (41%) | Unnamed event |
Over the 6 years from 2020 to 2025, Grundy County recorded 287 distinct power outage events, averaging 4.2 hours per event.
The single worst outage on record in Grundy County started November 5, 2025, lasting 111 hours and leaving up to 3,989 customers without power (45% of the county) at its peak.
June has historically been the worst month for outages in Grundy County, with 37 events recorded during that month across the dataset.
Based on this history, Grundy County earns a Reliability Grade of D, placing it in the 37th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Grundy County's outage profile
See more picks in our Best Dual-Fuel Portable Generators for Power Outages roundup.
Champion Power Equipment 4375-Watt Dual Fuel RV Ready Portable Generator with Free 3-Year Warranty
Outage-prep kit
See our outage-prep guides.
Similar counties in Tennessee
Counties with the closest reliability grade and national percentile to Grundy County.
| County | Grade | National percentile |
|---|---|---|
| Hancock County | D | 36th |
| Fayette County | D | 36th |
| Davidson County | D | 35th |
| Moore County | D | 39th |
| Fentress County | D | 33rd |
FAQ
How often does power go out in Grundy County?
Between 2020 and 2025, Grundy County recorded 287 outage events, averaging 4.2 hours each.
What is Grundy County's reliability grade?
Grundy County has a Reliability Grade of D, in the 37th national percentile.
What was the worst power outage in Grundy County?
The worst outage on record started November 5, 2025, lasting 111 hours and affecting up to 3,989 customers.