Hardeman 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 |
|---|---|---|---|
| Aug 8, 2025 | 2 hrs | 1,482 (11%) | Unnamed event |
| May 26, 2023 | <1 hr | 1,472 (11%) | Unnamed event |
| Nov 23, 2019 | <1 hr | 1,467 (11%) | Unnamed event |
| Aug 21, 2022 | 2 hrs | 1,461 (11%) | Unnamed event |
| May 16, 2024 | 8 hrs | 1,459 (11%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Hardeman County, Tennessee that day.
Over the 9 years from 2017 to 2025, Hardeman County recorded 137 distinct power outage events, averaging 2.9 hours per event.
The single worst outage on record in Hardeman County started August 8, 2025, lasting 2 hours and leaving up to 1,482 customers without power (11% of the county) at its peak.
May has historically been the worst month for outages in Hardeman County, with 19 events recorded during that month across the dataset.
Based on this history, Hardeman County earns a Reliability Grade of A, placing it in the 92nd percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Tennessee
Counties with the closest reliability grade and national percentile to Hardeman County.
| County | Grade | National percentile |
|---|---|---|
| Rutherford County | A | 92nd |
| Smith County | A | 92nd |
| Anderson County | A | 91st |
| Williamson County | A | 90th |
| Hamblen County | A | 90th |
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 Hardeman County?
Between 2017 and 2025, Hardeman County recorded 137 outage events, averaging 2.9 hours each.
What is Hardeman County's reliability grade?
Hardeman County has a Reliability Grade of A, in the 92nd national percentile.
What was the worst power outage in Hardeman County?
The worst outage on record started August 8, 2025, lasting 2 hours and affecting up to 1,482 customers.