Boone County Power Outage History
2014–2025 · Iowa
Worse than average — more frequent or longer outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 10, 2020 | 213 hrs | 9,757 (84%) | Drought |
| Oct 11, 2023 | 0 hrs | 3,414 (29%) | Drought |
| Oct 16, 2023 | 6 hrs | 2,653 (23%) | Drought |
| Dec 15, 2021 | 65 hrs | 2,644 (23%) | Tornado |
| Aug 22, 2015 | 1 hrs | 2,578 (22%) | Unnamed event |
Over the 12 years from 2014 to 2025, Boone County recorded 464 distinct power outage events, averaging 2.3 hours per event.
The single worst outage on record in Boone County started August 10, 2020 (Drought), lasting 213 hours and leaving up to 9,757 customers without power (84% of the county) at its peak.
July has historically been the worst month for outages in Boone County, with 69 events recorded during that month across the dataset.
Based on this history, Boone County earns a Reliability Grade of D, placing it in the 32nd percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Boone County.
| County | Grade | National percentile |
|---|---|---|
| Iowa County | D | 27th |
| Clinton County | D | 23rd |
| Cedar County | D | 22nd |
| Wayne County | C | 41st |
| Ringgold County | C | 42nd |
FAQ
How often does power go out in Boone County?
Between 2014 and 2025, Boone County recorded 464 outage events, averaging 2.3 hours each.
What is Boone County's reliability grade?
Boone County has a Reliability Grade of D, in the 32nd national percentile.
What was the worst power outage in Boone County?
The worst outage on record started August 10, 2020 (Drought), lasting 213 hours and affecting up to 9,757 customers.