Fall River CountyPower Outage History
2016–2025 · South Dakota
Better than average — fewer or shorter outages than most counties.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Nov 13, 2025 | 5 hrs | 4,310 (72%) | Unnamed event |
| Feb 11, 2016 | <1 hr | 3,277 (55%) | High Wind |
| Dec 18, 2025 | 115 hrs | 2,302 (38%) | High Wind |
| Sep 23, 2023 | 2 hrs | 2,235 (37%) | Unnamed event |
| Sep 11, 2023 | <1 hr | 2,233 (37%) | Unnamed event |
Over the 10 years from 2016 to 2025, Fall River County recorded 228 distinct power outage events, averaging 3.9 hours per event.
The single worst outage on record in Fall River County started November 13, 2025, lasting 5 hours and leaving up to 4,310 customers without power (72% of the county) at its peak.
July has historically been the worst month for outages in Fall River County, with 36 events recorded during that month across the dataset.
Based on this history, Fall River County earns a Reliability Grade of B, placing it in the 65th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Fall River County's outage profile
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Outage-prep kit
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Similar counties in South Dakota
Counties with the closest reliability grade and national percentile to Fall River County.
| County | Grade | National percentile |
|---|---|---|
| Yankton County | B | 65th |
| Hanson County | B | 65th |
| Lake County | B | 65th |
| Day County | B | 65th |
| Turner County | B | 64th |
Most reliable counties in South Dakota
The top 3 counties in South Dakota by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Clay County | A | 100th |
| Codington County | A | 98th |
| Tripp County | A | 98th |
Least reliable counties in South Dakota
The bottom 3 counties in South Dakota by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Harding County | D | 21st |
| Perkins County | D | 29th |
| Custer County | D | 30th |
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 Fall River County?
Between 2016 and 2025, Fall River County recorded 228 outage events, averaging 3.9 hours each.
What is Fall River County's reliability grade?
Fall River County has a Reliability Grade of B, in the 65th national percentile.
What was the worst power outage in Fall River County?
The worst outage on record started November 13, 2025, lasting 5 hours and affecting up to 4,310 customers.