Hillsdale 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 |
|---|---|---|---|
| Feb 23, 2023 | 118 hrs | 17,856 (58%) | Ice Storm |
| Feb 23, 2023 | 1 hrs | 16,725 (54%) | Ice Storm |
| Feb 23, 2023 | <1 hr | 15,279 (49%) | Ice Storm |
| Aug 12, 2021 | 5 hrs | 13,663 (44%) | Thunderstorm Wind |
| Aug 12, 2021 | 141 hrs | 13,659 (44%) | Thunderstorm Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Hillsdale County, Michigan that day.
Over the 12 years from 2014 to 2025, Hillsdale County recorded 430 distinct power outage events, averaging 5.9 hours per event.
The single worst outage on record in Hillsdale County started February 23, 2023 (Ice Storm), lasting 118 hours and leaving up to 17,856 customers without power (58% of the county) at its peak.
July has historically been the worst month for outages in Hillsdale County, with 58 events recorded during that month across the dataset.
Based on this history, Hillsdale County earns a Reliability Grade of F, placing it in the 7th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Michigan
Counties with the closest reliability grade and national percentile to Hillsdale County.
| County | Grade | National percentile |
|---|---|---|
| Lake County | F | 7th |
| Sanilac County | F | 8th |
| Livingston County | F | 8th |
| Mackinac County | F | 7th |
| Gladwin County | F | 8th |
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 Hillsdale County?
Between 2014 and 2025, Hillsdale County recorded 430 outage events, averaging 5.9 hours each.
What is Hillsdale County's reliability grade?
Hillsdale County has a Reliability Grade of F, in the 7th national percentile.
What was the worst power outage in Hillsdale County?
The worst outage on record started February 23, 2023 (Ice Storm), lasting 118 hours and affecting up to 17,856 customers.