Chelan CountyPower Outage History
What this grade means
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 |
|---|---|---|---|
| Dec 10, 2025 | 80 hrs | 14,176 (28%) | Flood |
| Dec 17, 2025 | 2 hrs | 6,972 (14%) | Flood |
| Dec 26, 2024 | 5 hrs | 5,884 (12%) | Heavy Snow |
| May 8, 2024 | 1 hrs | 4,427 (9%) | Unnamed event |
| Sep 9, 2025 | 11 hrs | 3,834 (8%) | Wildfire |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Chelan County, Washington that day.
Over the 7 years from 2019 to 2025, Chelan County recorded 143 distinct power outage events, averaging 2.9 hours per event.
The single worst outage on record in Chelan County started December 10, 2025 (Flood), lasting 80 hours and leaving up to 14,176 customers without power (28% of the county) at its peak.
July has historically been the worst month for outages in Chelan County, with 24 events recorded during that month across the dataset.
Based on this history, Chelan County earns a Reliability Grade of A, placing it in the 83rd percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Washington
Counties with the closest reliability grade and national percentile to Chelan County.
| County | Grade | National percentile |
|---|---|---|
| Asotin County | A | 84th |
| Douglas County | A | 82nd |
| Clark County | A | 85th |
| Yakima County | B | 80th |
| Whitman County | B | 78th |
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 Chelan County?
Between 2019 and 2025, Chelan County recorded 143 outage events, averaging 2.9 hours each.
What is Chelan County's reliability grade?
Chelan County has a Reliability Grade of A, in the 83rd national percentile.
What was the worst power outage in Chelan County?
The worst outage on record started December 10, 2025 (Flood), lasting 80 hours and affecting up to 14,176 customers.