Mahnomen CountyPower Outage History
What this grade means
(How grades are calculated)Top 20% most reliable nationally — infrequent, short outages. This county ranks in the most reliable fifth of all US counties in our dataset, based on 12 years of real DOE outage records: outages happen less often here, and when they do occur they tend to be resolved quickly compared to the rest of the country. Baseline outage risk is low, though a severe local storm can still occasionally cause a longer-than-usual outage regardless of the long-term track record.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Oct 11, 2025 | 46 hrs | 1,887 (46%) | Unnamed event |
| Jun 21, 2025 | 12 hrs | 1,070 (26%) | Thunderstorm Wind |
| Jul 27, 2023 | 2 hrs | 787 (19%) | Unnamed event |
| Dec 14, 2020 | 1 hrs | 367 (9%) | Unnamed event |
| Apr 23, 2022 | 6 hrs | 367 (9%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Mahnomen County, Minnesota that day.
Over the 6 years from 2020 to 2025, Mahnomen County recorded 67 distinct power outage events, averaging 3.7 hours per event.
The single worst outage on record in Mahnomen County started October 11, 2025, lasting 46 hours and leaving up to 1,887 customers without power (46% of the county) at its peak.
June has historically been the worst month for outages in Mahnomen County, with 14 events recorded during that month across the dataset.
Based on this history, Mahnomen County earns a Reliability Grade of A, placing it in the 90th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Minnesota
Counties with the closest reliability grade and national percentile to Mahnomen County.
| County | Grade | National percentile |
|---|---|---|
| Polk County | A | 90th |
| Renville County | A | 91st |
| Scott County | A | 91st |
| Houston County | A | 91st |
| Winona County | A | 89th |
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 Mahnomen County?
Between 2020 and 2025, Mahnomen County recorded 67 outage events, averaging 3.7 hours each.
What is Mahnomen County's reliability grade?
Mahnomen County has a Reliability Grade of A, in the 90th national percentile.
What was the worst power outage in Mahnomen County?
The worst outage on record started October 11, 2025, lasting 46 hours and affecting up to 1,887 customers.