Spink CountyPower Outage History
2019–2025 · South Dakota
Top 20% most reliable nationally — infrequent, short outages.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Apr 22, 2020 | 3 hrs | 2,219 (48%) | Flood |
| Dec 10, 2025 | 4 hrs | 1,192 (26%) | High Wind |
| Sep 2, 2021 | 2 hrs | 969 (21%) | Drought |
| Aug 28, 2020 | 3 hrs | 880 (19%) | Tornado |
| Aug 26, 2021 | 5 hrs | 806 (17%) | Drought |
Over the 7 years from 2019 to 2025, Spink County recorded 112 distinct power outage events, averaging 2.7 hours per event.
The single worst outage on record in Spink County started April 22, 2020 (Flood), lasting 3 hours and leaving up to 2,219 customers without power (48% of the county) at its peak.
April has historically been the worst month for outages in Spink County, with 16 events recorded during that month across the dataset.
Based on this history, Spink County earns a Reliability Grade of A, placing it in the 89th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Spink 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 Spink County.
| County | Grade | National percentile |
|---|---|---|
| Brown County | A | 90th |
| Aurora County | A | 87th |
| Charles Mix County | A | 90th |
| Davison County | A | 90th |
| Hutchinson County | A | 90th |
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 Spink County?
Between 2019 and 2025, Spink County recorded 112 outage events, averaging 2.7 hours each.
What is Spink County's reliability grade?
Spink County has a Reliability Grade of A, in the 89th national percentile.
What was the worst power outage in Spink County?
The worst outage on record started April 22, 2020 (Flood), lasting 3 hours and affecting up to 2,219 customers.