Dallam CountyPower Outage History
What this grade means
(How grades are calculated)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 |
|---|---|---|---|
| Aug 25, 2017 | <1 hr | 3,118 (80%) | Unnamed event |
| Jun 15, 2022 | <1 hr | 2,595 (67%) | Drought |
| Oct 29, 2020 | 4 hrs | 2,118 (55%) | Heavy Snow |
| May 17, 2022 | 7 hrs | 1,881 (48%) | Drought |
| Sep 2, 2017 | 5 hrs | 1,715 (44%) | Thunderstorm Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Dallam County, Texas that day.
Over the 12 years from 2014 to 2025, Dallam County recorded 359 distinct power outage events, averaging 2.9 hours per event.
The single worst outage on record in Dallam County started August 25, 2017, lasting less than 1 hour and leaving up to 3,118 customers without power (80% of the county) at its peak.
July has historically been the worst month for outages in Dallam County, with 57 events recorded during that month across the dataset.
Based on this history, Dallam County earns a Reliability Grade of B, placing it in the 64th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Texas
Counties with the closest reliability grade and national percentile to Dallam County.
| County | Grade | National percentile |
|---|---|---|
| Caldwell County | B | 64th |
| Rains County | B | 65th |
| Winkler County | B | 65th |
| Gonzales County | B | 63rd |
| Hood County | B | 63rd |
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 Dallam County?
Between 2014 and 2025, Dallam County recorded 359 outage events, averaging 2.9 hours each.
What is Dallam County's reliability grade?
Dallam County has a Reliability Grade of B, in the 64th national percentile.
What was the worst power outage in Dallam County?
The worst outage on record started August 25, 2017, lasting less than 1 hour and affecting up to 3,118 customers.