Gilliam CountyPower Outage History
2018–2025 · Oregon
Better than average — fewer or shorter outages than most counties. This county's outage history is better than the national median: recorded outages are less frequent and/or shorter in duration than a typical US county experienced over the same 12-year period. It isn't in the top tier nationally, but its track record points to lower-than-average outage risk.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| May 28, 2025 | 3 hrs | 567 (31%) | Unnamed event |
| Jul 11, 2025 | <1 hr | 567 (31%) | Unnamed event |
| Jul 3, 2025 | 4 hrs | 567 (31%) | Unnamed event |
| Sep 9, 2025 | 6 hrs | 551 (30%) | Unnamed event |
| Sep 9, 2025 | 3 hrs | 551 (30%) | Unnamed event |
Over the 8 years from 2018 to 2025, Gilliam County recorded 68 distinct power outage events, averaging 4.1 hours per event.
The single worst outage on record in Gilliam County started May 28, 2025, lasting 3 hours and leaving up to 567 customers without power (31% of the county) at its peak.
June has historically been the worst month for outages in Gilliam County, with 9 events recorded during that month across the dataset.
Based on this history, Gilliam County earns a Reliability Grade of B, placing it in the 77th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Gilliam County's outage profile
See more picks in our Best Small Power Stations (Under 1,000Wh) roundup.
Outage-prep kit
See our outage-prep guides.
No ads. No data selling. This site runs entirely on Amazon affiliate commissions — buying through our links costs you nothing extra and keeps it free for everyone.
Read our mission →Similar counties in Oregon
Counties with the closest reliability grade and national percentile to Gilliam County.
| County | Grade | National percentile |
|---|---|---|
| Union County | B | 74th |
| Umatilla County | B | 73rd |
| Morrow County | A | 81st |
| Hood River County | A | 82nd |
| Malheur County | A | 83rd |
Most reliable counties in Oregon
The top 3 counties in Oregon by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Harney County | A | 94th |
| Wasco County | A | 93rd |
| Deschutes County | A | 87th |
Least reliable counties in Oregon
The bottom 3 counties in Oregon by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Clackamas County | F | 8th |
| Marion County | F | 12th |
| Lincoln County | F | 19th |
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 Gilliam County?
Between 2018 and 2025, Gilliam County recorded 68 outage events, averaging 4.1 hours each.
What is Gilliam County's reliability grade?
Gilliam County has a Reliability Grade of B, in the 77th national percentile.
What was the worst power outage in Gilliam County?
The worst outage on record started May 28, 2025, lasting 3 hours and affecting up to 567 customers.