Louisa CountyPower Outage History
2014–2025 · Iowa
Average — typical outage frequency and duration nationally.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jul 20, 2016 | 7 hrs | 1,884 (41%) | Thunderstorm Wind |
| Mar 27, 2015 | 1 hrs | 1,711 (37%) | Unnamed event |
| Jan 16, 2015 | 1 hrs | 1,457 (32%) | Unnamed event |
| Jan 16, 2015 | <1 hr | 1,457 (32%) | Unnamed event |
| May 30, 2017 | 1 hrs | 1,441 (31%) | Unnamed event |
Over the 12 years from 2014 to 2025, Louisa County recorded 542 distinct power outage events, averaging 2.5 hours per event.
The single worst outage on record in Louisa County started July 20, 2016 (Thunderstorm Wind), lasting 7 hours and leaving up to 1,884 customers without power (41% of the county) at its peak.
July has historically been the worst month for outages in Louisa County, with 71 events recorded during that month across the dataset.
Based on this history, Louisa County earns a Reliability Grade of C, placing it in the 44th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Louisa County's outage profile
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Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Louisa County.
| County | Grade | National percentile |
|---|---|---|
| Adams County | C | 43rd |
| Jones County | C | 45th |
| Grundy County | C | 46th |
| Ringgold County | C | 42nd |
| Calhoun County | C | 47th |
Most reliable counties in Iowa
The top 3 counties in Iowa by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Clay County | A | 97th |
| Emmet County | A | 95th |
| Bremer County | A | 94th |
Least reliable counties in Iowa
The bottom 3 counties in Iowa by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Marshall County | F | 6th |
| Tama County | F | 12th |
| Jasper County | F | 14th |
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 Louisa County?
Between 2014 and 2025, Louisa County recorded 542 outage events, averaging 2.5 hours each.
What is Louisa County's reliability grade?
Louisa County has a Reliability Grade of C, in the 44th national percentile.
What was the worst power outage in Louisa County?
The worst outage on record started July 20, 2016 (Thunderstorm Wind), lasting 7 hours and affecting up to 1,884 customers.