Delta CountyPower Outage History
What this grade means
Average — typical outage frequency and duration nationally. This county sits in the middle of the national distribution — its outage frequency and duration over the past 12 years are close to the nationwide median, neither notably better nor worse than most other US counties. A typical amount of backup-power preparedness is reasonable here.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Apr 2, 2024 | 57 hrs | 6,367 (24%) | Winter Storm |
| Feb 27, 2019 | <1 hr | 5,046 (19%) | Winter Storm |
| Aug 25, 2015 | <1 hr | 4,681 (18%) | Unnamed event |
| Sep 15, 2015 | 3 hrs | 4,680 (18%) | Unnamed event |
| Aug 31, 2015 | 2 hrs | 4,670 (18%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Delta County, Michigan that day.
Over the 12 years from 2014 to 2025, Delta County recorded 245 distinct power outage events, averaging 3.8 hours per event.
The single worst outage on record in Delta County started April 2, 2024 (Winter Storm), lasting 57 hours and leaving up to 6,367 customers without power (24% of the county) at its peak.
June has historically been the worst month for outages in Delta County, with 33 events recorded during that month across the dataset.
Based on this history, Delta County earns a Reliability Grade of C, placing it in the 60th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Michigan
Counties with the closest reliability grade and national percentile to Delta County.
| County | Grade | National percentile |
|---|---|---|
| Bay County | B | 61st |
| Luce County | C | 57th |
| Schoolcraft County | C | 57th |
| Presque Isle County | C | 54th |
| Saginaw County | C | 52nd |
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 Delta County?
Between 2014 and 2025, Delta County recorded 245 outage events, averaging 3.8 hours each.
What is Delta County's reliability grade?
Delta County has a Reliability Grade of C, in the 60th national percentile.
What was the worst power outage in Delta County?
The worst outage on record started April 2, 2024 (Winter Storm), lasting 57 hours and affecting up to 6,367 customers.