Brookings County Power Outage History
2017–2025 · South Dakota
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 |
|---|---|---|---|
| May 12, 2022 | 95 hrs | 3,433 (16%) | Hail |
| Jul 21, 2020 | 3 hrs | 2,232 (10%) | Thunderstorm Wind |
| May 25, 2021 | 2 hrs | 2,002 (9%) | Unnamed event |
| Apr 23, 2022 | 3 hrs | 1,865 (9%) | High Wind |
| Jul 20, 2019 | 5 hrs | 858 (4%) | Flood |
Over the 9 years from 2017 to 2025, Brookings County recorded 139 distinct power outage events, averaging 2.7 hours per event.
The single worst outage on record in Brookings County started May 12, 2022 (Hail), lasting 95 hours and leaving up to 3,433 customers without power (16% of the county) at its peak.
May has historically been the worst month for outages in Brookings County, with 19 events recorded during that month across the dataset.
Based on this history, Brookings County earns a Reliability Grade of A, placing it in the 91st percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Brookings County's outage profile
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Similar counties in South Dakota
Counties with the closest reliability grade and national percentile to Brookings County.
| County | Grade | National percentile |
|---|---|---|
| Douglas County | A | 90th |
| Hutchinson County | A | 90th |
| Davison County | A | 90th |
| Charles Mix County | A | 90th |
| Brown County | A | 90th |
FAQ
How often does power go out in Brookings County?
Between 2017 and 2025, Brookings County recorded 139 outage events, averaging 2.7 hours each.
What is Brookings County's reliability grade?
Brookings County has a Reliability Grade of A, in the 91st national percentile.
What was the worst power outage in Brookings County?
The worst outage on record started May 12, 2022 (Hail), lasting 95 hours and affecting up to 3,433 customers.