San Juan County Power Outage History
2018–2025 · 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 |
|---|---|---|---|
| Sep 26, 2023 | 8 hrs | 14,753 (94%) | Unnamed event |
| Sep 28, 2023 | 5 hrs | 14,738 (94%) | Unnamed event |
| Sep 27, 2023 | 6 hrs | 14,738 (94%) | Unnamed event |
| Dec 24, 2022 | 9 hrs | 14,732 (94%) | Winter Weather |
| Dec 23, 2022 | 18 hrs | 14,728 (94%) | Winter Weather |
Over the 8 years from 2018 to 2025, San Juan County recorded 357 distinct power outage events, averaging 3.9 hours per event.
The single worst outage on record in San Juan County started September 26, 2023, lasting 8 hours and leaving up to 14,753 customers without power (94% of the county) at its peak.
August has historically been the worst month for outages in San Juan County, with 52 events recorded during that month across the dataset.
Based on this history, San Juan County earns a Reliability Grade of F, placing it in the 20th 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 San Juan County.
| County | Grade | National percentile |
|---|---|---|
| Skagit County | D | 21st |
| Stevens County | F | 18th |
| Island County | F | 17th |
| Lincoln County | D | 23rd |
| Whatcom County | D | 24th |
FAQ
How often does power go out in San Juan County?
Between 2018 and 2025, San Juan County recorded 357 outage events, averaging 3.9 hours each.
What is San Juan County's reliability grade?
San Juan County has a Reliability Grade of F, in the 20th national percentile.
What was the worst power outage in San Juan County?
The worst outage on record started September 26, 2023, lasting 8 hours and affecting up to 14,753 customers.