Arenac CountyPower Outage History
What this grade means
Bottom 20% least reliable nationally — frequent and/or long outages. This county ranks in the least reliable fifth of all US counties in our dataset: some combination of frequent outages, long restoration times, or customers affected puts it near the bottom nationally. Backup power is worth prioritizing here rather than treating it as optional.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 29, 2018 | 96 hrs | 8,089 (67%) | Tornado |
| Aug 11, 2021 | 18 hrs | 7,295 (60%) | Thunderstorm Wind |
| Aug 12, 2021 | 5 hrs | 7,139 (59%) | Thunderstorm Wind |
| Aug 12, 2021 | <1 hr | 6,435 (53%) | Thunderstorm Wind |
| Aug 12, 2021 | 76 hrs | 6,350 (52%) | Thunderstorm Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Arenac County, Michigan that day.
Over the 12 years from 2014 to 2025, Arenac County recorded 658 distinct power outage events, averaging 5.6 hours per event.
The single worst outage on record in Arenac County started August 29, 2018 (Tornado), lasting 96 hours and leaving up to 8,089 customers without power (67% of the county) at its peak.
July has historically been the worst month for outages in Arenac County, with 83 events recorded during that month across the dataset.
Based on this history, Arenac County earns a Reliability Grade of F, placing it in the 3rd percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Michigan
Counties with the closest reliability grade and national percentile to Arenac County.
| County | Grade | National percentile |
|---|---|---|
| Iosco County | F | 3rd |
| Cheboygan County | F | 3rd |
| Otsego County | F | 4th |
| Crawford County | F | 4th |
| Clare County | F | 2nd |
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 Arenac County?
Between 2014 and 2025, Arenac County recorded 658 outage events, averaging 5.6 hours each.
What is Arenac County's reliability grade?
Arenac County has a Reliability Grade of F, in the 3rd national percentile.
What was the worst power outage in Arenac County?
The worst outage on record started August 29, 2018 (Tornado), lasting 96 hours and affecting up to 8,089 customers.