St. Clair CountyPower Outage History
What this grade means
Average — typical outage frequency and duration nationally. This county sits in the middle of the national distribution — its outage frequency and duration over the past 12 years are close to the nationwide median, neither notably better nor worse than most other US counties. A typical amount of backup-power preparedness is reasonable here.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Oct 29, 2020 | 110 hrs | 16,066 (31%) | Tropical Storm |
| Feb 6, 2021 | <1 hr | 14,017 (27%) | Unnamed event |
| Sep 24, 2018 | 9 hrs | 13,900 (27%) | Unnamed event |
| Jul 28, 2023 | 5 hrs | 12,711 (25%) | Unnamed event |
| Oct 28, 2025 | <1 hr | 7,960 (15%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for St. Clair County, Alabama that day.
Over the 9 years from 2017 to 2025, St. Clair County recorded 1,038 distinct power outage events, averaging 2.7 hours per event.
The single worst outage on record in St. Clair County started October 29, 2020 (Tropical Storm), lasting 110 hours and leaving up to 16,066 customers without power (31% of the county) at its peak.
June has historically been the worst month for outages in St. Clair County, with 119 events recorded during that month across the dataset.
Based on this history, St. Clair County earns a Reliability Grade of C, placing it in the 44th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Alabama
Counties with the closest reliability grade and national percentile to St. Clair County.
| County | Grade | National percentile |
|---|---|---|
| Henry County | C | 44th |
| Shelby County | C | 44th |
| Hale County | C | 46th |
| Blount County | C | 41st |
| Cullman County | C | 49th |
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 St. Clair County?
Between 2017 and 2025, St. Clair County recorded 1,038 outage events, averaging 2.7 hours each.
What is St. Clair County's reliability grade?
St. Clair County has a Reliability Grade of C, in the 44th national percentile.
What was the worst power outage in St. Clair County?
The worst outage on record started October 29, 2020 (Tropical Storm), lasting 110 hours and affecting up to 16,066 customers.