Coos 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 |
|---|---|---|---|
| Jan 20, 2018 | <1 hr | 22,393 (55%) | High Surf |
| Oct 5, 2024 | 13 hrs | 14,457 (36%) | Wildfire |
| Jan 3, 2022 | 68 hrs | 14,226 (35%) | Frost/Freeze |
| Sep 9, 2025 | <1 hr | 11,306 (28%) | Unnamed event |
| Mar 16, 2025 | 2 hrs | 11,291 (28%) | Flood |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Coos County, Oregon that day.
Over the 9 years from 2017 to 2025, Coos County recorded 412 distinct power outage events, averaging 3.1 hours per event.
The single worst outage on record in Coos County started January 20, 2018 (High Surf), lasting less than 1 hour and leaving up to 22,393 customers without power (55% of the county) at its peak.
November has historically been the worst month for outages in Coos County, with 53 events recorded during that month across the dataset.
Based on this history, Coos County earns a Reliability Grade of C, placing it in the 55th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Oregon
Counties with the closest reliability grade and national percentile to Coos County.
| County | Grade | National percentile |
|---|---|---|
| Lane County | C | 53rd |
| Sherman County | C | 56th |
| Jefferson County | C | 53rd |
| Washington County | C | 53rd |
| Jackson 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 Coos County?
Between 2017 and 2025, Coos County recorded 412 outage events, averaging 3.1 hours each.
What is Coos County's reliability grade?
Coos County has a Reliability Grade of C, in the 55th national percentile.
What was the worst power outage in Coos County?
The worst outage on record started January 20, 2018 (High Surf), lasting less than 1 hour and affecting up to 22,393 customers.