Clackamas County Power Outage History
2014–2025 · Oregon
Bottom 20% least reliable nationally — frequent and/or long outages. How grades are calculated
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 |
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).
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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 |
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.