Coal CountyPower Outage History
2014–2025 · Oklahoma
Average — typical outage frequency and duration nationally.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| May 27, 2017 | 2 hrs | 2,857 (53%) | Flash Flood |
| Jun 19, 2016 | 1 hrs | 2,640 (49%) | Unnamed event |
| Aug 22, 2017 | 2 hrs | 2,546 (47%) | Unnamed event |
| May 28, 2017 | 15 hrs | 2,364 (44%) | Hail |
| Aug 8, 2016 | 6 hrs | 2,068 (38%) | Unnamed event |
Over the 12 years from 2014 to 2025, Coal County recorded 577 distinct power outage events, averaging 1.9 hours per event.
The single worst outage on record in Coal County started May 27, 2017 (Flash Flood), lasting 2 hours and leaving up to 2,857 customers without power (53% of the county) at its peak.
May has historically been the worst month for outages in Coal County, with 79 events recorded during that month across the dataset.
Based on this history, Coal County earns a Reliability Grade of C, placing it in the 54th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Oklahoma
Counties with the closest reliability grade and national percentile to Coal County.
| County | Grade | National percentile |
|---|---|---|
| Garfield County | C | 54th |
| Nowata County | C | 53rd |
| Okfuskee County | C | 53rd |
| Choctaw County | C | 51st |
| Major County | C | 51st |
Most reliable counties in Oklahoma
The top 3 counties in Oklahoma by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Texas County | A | 96th |
| Kay County | A | 95th |
| Greer County | A | 89th |
Least reliable counties in Oklahoma
The bottom 3 counties in Oklahoma by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Caddo County | F | 4th |
| Washita County | F | 10th |
| Oklahoma County | F | 15th |
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 Coal County?
Between 2014 and 2025, Coal County recorded 577 outage events, averaging 1.9 hours each.
What is Coal County's reliability grade?
Coal County has a Reliability Grade of C, in the 54th national percentile.
What was the worst power outage in Coal County?
The worst outage on record started May 27, 2017 (Flash Flood), lasting 2 hours and affecting up to 2,857 customers.