Smith County Power Outage History
2015–2025 · Tennessee
Top 20% most reliable nationally — infrequent, short outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Mar 24, 2019 | 3 hrs | 3,448 (28%) | Unnamed event |
| Aug 6, 2017 | 1 hrs | 3,392 (28%) | Unnamed event |
| Jan 2, 2018 | 1 hrs | 3,378 (28%) | Unnamed event |
| Jan 2, 2018 | 0 hrs | 3,378 (28%) | Unnamed event |
| Sep 30, 2018 | 2 hrs | 3,368 (28%) | Unnamed event |
Over the 11 years from 2015 to 2025, Smith County recorded 163 distinct power outage events, averaging 2.3 hours per event.
The single worst outage on record in Smith County started March 24, 2019, lasting 3 hours and leaving up to 3,448 customers without power (28% of the county) at its peak.
June has historically been the worst month for outages in Smith County, with 23 events recorded during that month across the dataset.
Based on this history, Smith County earns a Reliability Grade of A, placing it in the 92nd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Smith County's outage profile
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Similar counties in Tennessee
Counties with the closest reliability grade and national percentile to Smith County.
| County | Grade | National percentile |
|---|---|---|
| Hardeman County | A | 92nd |
| Rutherford County | A | 92nd |
| Anderson County | A | 91st |
| Williamson County | A | 90th |
| Hamblen County | A | 90th |
FAQ
How often does power go out in Smith County?
Between 2015 and 2025, Smith County recorded 163 outage events, averaging 2.3 hours each.
What is Smith County's reliability grade?
Smith County has a Reliability Grade of A, in the 92nd national percentile.
What was the worst power outage in Smith County?
The worst outage on record started March 24, 2019, lasting 3 hours and affecting up to 3,448 customers.