Adams County Power Outage History
2014–2025 · Washington
Top 20% most reliable nationally — infrequent, short outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Apr 9, 2016 | 3 hrs | 2,585 (17%) | Unnamed event |
| May 7, 2015 | 1 hrs | 2,575 (17%) | Unnamed event |
| Aug 18, 2021 | 8 hrs | 2,054 (14%) | Unnamed event |
| Mar 31, 2021 | 0 hrs | 1,618 (11%) | Dust Storm |
| Feb 23, 2020 | 27 hrs | 1,462 (10%) | Unnamed event |
Over the 12 years from 2014 to 2025, Adams County recorded 210 distinct power outage events, averaging 2.5 hours per event.
The single worst outage on record in Adams County started April 9, 2016, lasting 3 hours and leaving up to 2,585 customers without power (17% of the county) at its peak.
December has historically been the worst month for outages in Adams County, with 27 events recorded during that month across the dataset.
Based on this history, Adams County earns a Reliability Grade of A, placing it in the 91st percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Adams County's outage profile
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Similar counties in Washington
Counties with the closest reliability grade and national percentile to Adams County.
| County | Grade | National percentile |
|---|---|---|
| Cowlitz County | A | 92nd |
| Benton County | A | 95th |
| Clark County | A | 85th |
| Asotin County | A | 84th |
| Okanogan County | A | 97th |
FAQ
How often does power go out in Adams County?
Between 2014 and 2025, Adams County recorded 210 outage events, averaging 2.5 hours each.
What is Adams County's reliability grade?
Adams County has a Reliability Grade of A, in the 91st national percentile.
What was the worst power outage in Adams County?
The worst outage on record started April 9, 2016, lasting 3 hours and affecting up to 2,585 customers.