Jefferson 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 1, 2025 | 1 hrs | 10,920 (67%) | Unnamed event |
| Dec 11, 2022 | 29 hrs | 8,569 (53%) | Heavy Snow |
| Aug 13, 2018 | <1 hr | 5,145 (32%) | Unnamed event |
| May 30, 2020 | 64 hrs | 4,761 (29%) | Thunderstorm Wind |
| Nov 13, 2020 | 5 hrs | 4,223 (26%) | Winter Storm |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Jefferson County, Oregon that day.
Over the 9 years from 2017 to 2025, Jefferson County recorded 307 distinct power outage events, averaging 3.6 hours per event.
The single worst outage on record in Jefferson County started April 1, 2025, lasting 1 hours and leaving up to 10,920 customers without power (67% of the county) at its peak.
August has historically been the worst month for outages in Jefferson County, with 61 events recorded during that month across the dataset.
Based on this history, Jefferson County earns a Reliability Grade of C, placing it in the 53rd percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Oregon
Counties with the closest reliability grade and national percentile to Jefferson County.
| County | Grade | National percentile |
|---|---|---|
| Washington County | C | 53rd |
| Lane County | C | 53rd |
| Jackson County | C | 52nd |
| Coos County | C | 55th |
| Sherman County | C | 56th |
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 Jefferson County?
Between 2017 and 2025, Jefferson County recorded 307 outage events, averaging 3.6 hours each.
What is Jefferson County's reliability grade?
Jefferson County has a Reliability Grade of C, in the 53rd national percentile.
What was the worst power outage in Jefferson County?
The worst outage on record started April 1, 2025, lasting 1 hours and affecting up to 10,920 customers.