Iowa 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 | 177 hrs | 6,828 (80%) | Thunderstorm Wind |
| Dec 16, 2021 | 7 hrs | 6,623 (78%) | Unnamed event |
| May 3, 2021 | 1 hrs | 4,896 (57%) | Unnamed event |
| Aug 21, 2017 | 5 hrs | 4,655 (55%) | Unnamed event |
| Aug 4, 2016 | 22 hrs | 4,064 (48%) | Unnamed event |
Over the 12 years from 2014 to 2025, Iowa County recorded 828 distinct power outage events, averaging 1.9 hours per event.
The single worst outage on record in Iowa County started August 10, 2020 (Thunderstorm Wind), lasting 177 hours and leaving up to 6,828 customers without power (80% of the county) at its peak.
May has historically been the worst month for outages in Iowa County, with 98 events recorded during that month across the dataset.
Based on this history, Iowa County earns a Reliability Grade of D, placing it in the 27th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Iowa County's outage profile
See more picks in our Best Dual-Fuel Portable Generators for Power Outages roundup.
Champion Power Equipment 4375-Watt Dual Fuel RV Ready Portable Generator with Free 3-Year Warranty
Outage-prep kit
See our outage-prep guides.
Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Iowa County.
| County | Grade | National percentile |
|---|---|---|
| Clinton County | D | 23rd |
| Boone County | D | 32nd |
| Cedar County | D | 22nd |
| Monroe County | D | 21st |
| Greene County | D | 20th |
FAQ
How often does power go out in Iowa County?
Between 2014 and 2025, Iowa County recorded 828 outage events, averaging 1.9 hours each.
What is Iowa County's reliability grade?
Iowa County has a Reliability Grade of D, in the 27th national percentile.
What was the worst power outage in Iowa County?
The worst outage on record started August 10, 2020 (Thunderstorm Wind), lasting 177 hours and affecting up to 6,828 customers.