Yukon-KoyukukPower Outage History
2016–2025 · Alaska
Top 20% most reliable nationally — infrequent, short outages. This county ranks in the most reliable fifth of all US counties in our dataset, based on 12 years of real DOE outage records: outages happen less often here, and when they do occur they tend to be resolved quickly compared to the rest of the country. Baseline outage risk is low, though a severe local storm can still occasionally cause a longer-than-usual outage regardless of the long-term track record.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Oct 18, 2018 | <1 hr | 683 (18%) | Unnamed event |
| Dec 24, 2025 | <1 hr | 408 (11%) | Winter Storm |
| Jul 3, 2025 | 134 hrs | 407 (11%) | Unnamed event |
| Jun 6, 2025 | 3 hrs | 406 (11%) | Unnamed event |
| Jun 19, 2024 | 4 hrs | 404 (11%) | Unnamed event |
Over the 10 years from 2016 to 2025, Yukon-Koyukuk recorded 110 distinct power outage events, averaging 3.8 hours per event.
The single worst outage on record in Yukon-Koyukuk started October 18, 2018, lasting less than 1 hour and leaving up to 683 customers without power (18% of the county) at its peak.
July has historically been the worst month for outages in Yukon-Koyukuk, with 16 events recorded during that month across the dataset.
Based on this history, Yukon-Koyukuk earns a Reliability Grade of A, placing it in the 88th percentile nationally for grid reliability (higher percentile = more reliable).
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Read our mission →Similar counties in Alaska
Counties with the closest reliability grade and national percentile to Yukon-Koyukuk.
| County | Grade | National percentile |
|---|---|---|
| Valdez-Cordova | A | 99th |
| Anchorage | C | 59th |
| Fairbanks North Star | D | 33rd |
| Kenai Peninsula | D | 27th |
| Matanuska-Susitna | D | 23rd |
Most reliable counties in Alaska
The top 3 counties in Alaska by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Valdez-Cordova | A | 99th |
| Yukon-Koyukuk | A | 88th |
| Anchorage | C | 59th |
Least reliable counties in Alaska
The bottom 3 counties in Alaska by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Denali | F | 14th |
| Southeast Fairbanks | D | 23rd |
| Matanuska-Susitna | D | 23rd |
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 Yukon-Koyukuk?
Between 2016 and 2025, Yukon-Koyukuk recorded 110 outage events, averaging 3.8 hours each.
What is Yukon-Koyukuk's reliability grade?
Yukon-Koyukuk has a Reliability Grade of A, in the 88th national percentile.
What was the worst power outage in Yukon-Koyukuk?
The worst outage on record started October 18, 2018, lasting less than 1 hour and affecting up to 683 customers.