Clackamas 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 12, 2021 | 144 hrs | 104,608 (56%) | Unnamed event |
| Apr 7, 2017 | 61 hrs | 57,520 (31%) | Unnamed event |
| Feb 18, 2021 | 17 hrs | 50,055 (27%) | Unnamed event |
| Sep 8, 2020 | 43 hrs | 47,773 (26%) | Unnamed event |
| Dec 27, 2022 | 86 hrs | 37,223 (20%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Clackamas County, Oregon that day.
Over the 12 years from 2014 to 2025, Clackamas County recorded 1,721 distinct power outage events, averaging 5.0 hours per event.
The single worst outage on record in Clackamas County started February 12, 2021, lasting 144 hours and leaving up to 104,608 customers without power (56% of the county) at its peak.
December has historically been the worst month for outages in Clackamas County, with 204 events recorded during that month across the dataset.
Based on this history, Clackamas County earns a Reliability Grade of F, placing it in the 8th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Oregon
Counties with the closest reliability grade and national percentile to Clackamas County.
| County | Grade | National percentile |
|---|---|---|
| Marion County | F | 12th |
| Lincoln County | F | 19th |
| Tillamook County | D | 20th |
| Clatsop County | D | 25th |
| Wallowa County | D | 26th |
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 Clackamas County?
Between 2014 and 2025, Clackamas County recorded 1,721 outage events, averaging 5.0 hours each.
What is Clackamas County's reliability grade?
Clackamas County has a Reliability Grade of F, in the 8th national percentile.
What was the worst power outage in Clackamas County?
The worst outage on record started February 12, 2021, lasting 144 hours and affecting up to 104,608 customers.