Davis CountyPower Outage History
2014–2025 · Iowa
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 |
|---|---|---|---|
| Aug 29, 2019 | <1 hr | 1,428 (30%) | Hail |
| Apr 16, 2024 | <1 hr | 598 (13%) | Hail |
| Dec 16, 2021 | 22 hrs | 563 (12%) | High Wind |
| May 4, 2024 | 3 hrs | 544 (11%) | Unnamed event |
| Mar 4, 2023 | 3 hrs | 437 (9%) | Unnamed event |
Over the 12 years from 2014 to 2025, Davis County recorded 368 distinct power outage events, averaging 2.5 hours per event.
The single worst outage on record in Davis County started August 29, 2019 (Hail), lasting less than 1 hour and leaving up to 1,428 customers without power (30% of the county) at its peak.
July has historically been the worst month for outages in Davis County, with 64 events recorded during that month across the dataset.
Based on this history, Davis County earns a Reliability Grade of A, placing it in the 82nd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Davis County's outage profile
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Outage-prep kit
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Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Davis County.
| County | Grade | National percentile |
|---|---|---|
| Lucas County | A | 82nd |
| Wapello County | A | 83rd |
| Woodbury County | A | 83rd |
| Mahaska County | A | 84th |
| Madison County | A | 81st |
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 Davis County?
Between 2014 and 2025, Davis County recorded 368 outage events, averaging 2.5 hours each.
What is Davis County's reliability grade?
Davis County has a Reliability Grade of A, in the 82nd national percentile.
What was the worst power outage in Davis County?
The worst outage on record started August 29, 2019 (Hail), lasting less than 1 hour and affecting up to 1,428 customers.