Island County Power Outage History
2015–2025 · Washington
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 |
|---|---|---|---|
| Nov 13, 2020 | 36 hrs | 48,356 (50%) | Unnamed event |
| Jan 13, 2021 | 87 hrs | 48,278 (50%) | Unnamed event |
| Dec 17, 2025 | 70 hrs | 47,704 (50%) | Unnamed event |
| Dec 14, 2024 | 37 hrs | 41,350 (43%) | Unnamed event |
| Nov 15, 2021 | 77 hrs | 39,506 (41%) | Unnamed event |
Over the 11 years from 2015 to 2025, Island County recorded 660 distinct power outage events, averaging 4.4 hours per event.
The single worst outage on record in Island County started November 13, 2020, lasting 36 hours and leaving up to 48,356 customers without power (50% of the county) at its peak.
December has historically been the worst month for outages in Island County, with 98 events recorded during that month across the dataset.
Based on this history, Island County earns a Reliability Grade of F, placing it in the 17th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Washington
Counties with the closest reliability grade and national percentile to Island County.
| County | Grade | National percentile |
|---|---|---|
| Stevens County | F | 18th |
| Kitsap County | F | 15th |
| San Juan County | F | 20th |
| Skagit County | D | 21st |
| Ferry County | F | 10th |
FAQ
How often does power go out in Island County?
Between 2015 and 2025, Island County recorded 660 outage events, averaging 4.4 hours each.
What is Island County's reliability grade?
Island County has a Reliability Grade of F, in the 17th national percentile.
What was the worst power outage in Island County?
The worst outage on record started November 13, 2020, lasting 36 hours and affecting up to 48,356 customers.